[booh] / bin / booh

#! /usr/bin/ruby
#
#                         *  BOOH  *
#
# A.k.a `Best web-album Of the world, Or your money back, Humerus'.
#
# The acronyn sucks, however this is a tribute to Dragon Ball by
# Akira Toriyama, where the last enemy beaten by heroes of Dragon
# Ball is named "Boo". But there was already a free software project
# called Boo, so this one will be it "Booh". Or whatever.
#
#
# Copyright (c) 2004 Guillaume Cottenceau <http://zarb.org/~gc/resource/gc_mail.png>
#
# This software may be freely redistributed under the terms of the GNU
# public license version 2.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

require 'getoptlong'
require 'tempfile'
require 'thread'

require 'gtk2'
require 'booh/gtkadds'
require 'booh/GtkAutoTable'

require 'gettext'
include GetText
bindtextdomain("booh")

require 'rexml/document'
include REXML

require 'booh/booh-lib'
include Booh
require 'booh/UndoHandler'


#- options
$options = [
    [ '--help',          '-h', GetoptLong::NO_ARGUMENT,       _("Get help message") ],

    [ '--verbose-level', '-v', GetoptLong::REQUIRED_ARGUMENT, _("Set max verbosity level (0: errors, 1: warnings, 2: important messages, 3: other messages)") ],
]

#- default values for some globals 
$xmldir = nil
$modified = false
$current_cursor = nil
$ignore_videos = false
$button1_pressed_autotable = false
$generated_outofline = false

def usage
    puts _("Usage: %s [OPTION]...") % File.basename($0)
    $options.each { |ary|
        printf " %3s, %-15s %s\n", ary[1], ary[0], ary[3]
    }
end

def handle_options
    parser = GetoptLong.new
    parser.set_options(*$options.collect { |ary| ary[0..2] })
    begin
        parser.each_option do |name, arg|
            case name
            when '--help'
                usage
                exit(0)

            when '--verbose-level'
                $verbose_level = arg.to_i

            end
        end
    rescue
        puts $!
        usage
        exit(1)
    end
end

def read_config
    $config = {}
    $config_file = File.expand_path('~/.booh-gui-rc')
    if File.readable?($config_file)
        $xmldoc = REXML::Document.new(File.new($config_file))
        $xmldoc.root.elements.each { |element|
            txt = element.get_text
            if txt
                if txt.value =~ /~~~/ || element.name == 'last-opens'
                    $config[element.name] = txt.value.split(/~~~/)
                else
                    $config[element.name] = txt.value
                end
            elsif element.elements.size == 0
                $config[element.name] = ''
            else
                $config[element.name] = {}
                element.each { |chld|
                    txt = chld.get_text
                    $config[element.name][chld.name] = txt ? txt.value : nil
                }
            end
        }
    end
    $config['video-viewer'] ||= '/usr/bin/mplayer %f'
    $config['browser'] ||= "/usr/bin/mozilla-firefox -remote 'openURL(%f,new-window)' || /usr/bin/mozilla-firefox %f"
    if !FileTest.directory?(File.expand_path('~/.booh'))
        system("mkdir ~/.booh")
    end

    $tempfiles = []
    $todelete = []
end

def check_config
    if !system("which convert >/dev/null 2>/dev/null")
        show_popup($main_window, utf8(_("The program 'convert' is needed. Please install it.
It is generally available with the 'ImageMagick' software package.")), { :pos_centered => true })
        exit 1
    end
    if !system("which identify >/dev/null 2>/dev/null")
        show_popup($main_window, utf8(_("The program 'identify' is needed to get images sizes and EXIF data. Please install it.
It is generally available with the 'ImageMagick' software package.")), { :pos_centered => true })
    end
    missing = %w(transcode mencoder).delete_if { |prg| system("which #{prg} >/dev/null 2>/dev/null") }
    if missing != []
        show_popup($main_window, utf8(_("The following program(s) are needed to handle videos: '%s'. Videos will be ignored.") % missing.join(', ')), { :pos_centered => true })
    end

    viewer_binary = $config['video-viewer'].split.first
    if viewer_binary && !File.executable?(viewer_binary)
        show_popup($main_window, utf8(_("The configured video viewer seems to be unavailable.
You should fix this in Edit/Preferences so that you can view videos.

Problem was: '%s' is not an executable file.
Hint: don't forget to specify the full path to the executable,
e.g. '/usr/bin/mplayer' is correct but 'mplayer' only is not.") % viewer_binary), { :pos_centered => true, :not_transient => true })
    end
    browser_binary = $config['browser'].split.first
    if browser_binary && !File.executable?(browser_binary)
        show_popup($main_window, utf8(_("The configured browser seems to be unavailable.
You should fix this in Edit/Preferences so that you can open URLs.

Problem was: '%s' is not an executable file.") % browser_binary), { :pos_centered => true, :not_transient => true })
    end
end

def write_config
    if $config['last-opens'] && $config['last-opens'].size > 5
        $config['last-opens'] = $config['last-opens'][-5, 5]
    end

    ios = File.open($config_file, "w")
    $xmldoc = Document.new "<booh-gui-rc version='#{$VERSION}'/>"
    $xmldoc << XMLDecl.new(XMLDecl::DEFAULT_VERSION, $CURRENT_CHARSET)
    $config.each_pair { |key, value|
        elem = $xmldoc.root.add_element key
        if value.is_a? Hash
            $config[key].each_pair { |subkey, subvalue|
                subelem = elem.add_element subkey
                subelem.add_text subvalue.to_s
            }
        elsif value.is_a? Array
            elem.add_text value.join('~~~')
        else
            if !value
                elem.remove
            else
                elem.add_text value.to_s
            end
        end
    }
    $xmldoc.write(ios, 0)
    ios.close

    $tempfiles.each { |f|
        system("rm -f #{f}")
    }
end

def set_mousecursor(what, *widget)
    cursor = what.nil? ? nil : Gdk::Cursor.new(what)
    if widget[0] && widget[0].window
        widget[0].window.cursor = cursor
    end
    if $main_window.window
        $main_window.window.cursor = cursor
    end
    $current_cursor = what
end
def set_mousecursor_wait(*widget)
    gtk_thread_protect { set_mousecursor(Gdk::Cursor::WATCH, *widget) }
    if Thread.current == Thread.main
        Gtk.main_iteration while Gtk.events_pending?
    end
end
def set_mousecursor_normal(*widget)
    gtk_thread_protect { set_mousecursor($save_cursor = nil, *widget) }
end
def push_mousecursor_wait(*widget)
    if $current_cursor != Gdk::Cursor::WATCH
        $save_cursor = $current_cursor
        gtk_thread_protect { set_mousecursor_wait(*widget) }
    end
end
def pop_mousecursor(*widget)
    gtk_thread_protect { set_mousecursor($save_cursor || nil, *widget) }
end

def current_dest_dir
    source = $xmldoc.root.attributes['source']
    dest = $xmldoc.root.attributes['destination']
    return make_dest_filename(from_utf8($current_path.sub(/^#{Regexp.quote(source)}/, dest)))
end

def full_src_dir_to_rel(path, source)
    return path.sub(/^#{Regexp.quote(from_utf8(source))}/, '')
end

def build_full_dest_filename(filename)
    return current_dest_dir + '/' + make_dest_filename(from_utf8(filename))
end

def save_undo(name, closure, *params)
    UndoHandler.save_undo(name, closure, [ *params ])
    $undo_tb.sensitive = $undo_mb.sensitive = true
    $redo_tb.sensitive = $redo_mb.sensitive = false
end

def view_element(filename, closures)
    if entry2type(filename) == 'video'
        cmd = from_utf8($config['video-viewer']).gsub('%f', "'#{from_utf8($current_path + '/' + filename)}'") + ' &'
        msg 2, cmd
        system(cmd)
        return
    end

    w = Gtk::Window.new.set_title(filename)

    msg 3, "filename: #{filename}"
    dest_img = build_full_dest_filename(filename).sub(/\.[^\.]+$/, '') + "-#{$default_size['fullscreen']}.jpg"
    #- typically this file won't exist in case of videos; try with the largest thumbnail around
    if !File.exists?(dest_img)
        if entry2type(filename) == 'video'
            alternatives = Dir[build_full_dest_filename(filename).sub(/\.[^\.]+$/, '') + '-*'].sort
            if not alternatives.empty?
                dest_img = alternatives[-1]
            end
        else
            push_mousecursor_wait
            gen_thumbnails_element(from_utf8("#{$current_path}/#{filename}"), $xmldir, false, [ { 'filename' => dest_img, 'size' => $default_size['fullscreen'] } ])
            pop_mousecursor
            if !File.exists?(dest_img)
                msg 2, _("Could not generate fullscreen thumbnail!")
                return
                end
        end
    end
    evt = Gtk::EventBox.new.add(Gtk::Alignment.new(0.5, 0.5, 0, 0).add(Gtk::Frame.new.add(Gtk::Image.new(dest_img)).set_shadow_type(Gtk::SHADOW_ETCHED_OUT)))
    evt.signal_connect('button-press-event') { |this, event|
        if event.event_type == Gdk::Event::BUTTON_PRESS && event.button == 1
            $config['nogestures'] or $gesture_press = { :x => event.x, :y => event.y }
        end
        if event.event_type == Gdk::Event::BUTTON_PRESS && event.button == 3
            menu = Gtk::Menu.new
            menu.append(delete_item  = Gtk::ImageMenuItem.new(Gtk::Stock::DELETE))
            delete_item.signal_connect('activate') {
                w.destroy
                closures[:delete].call
            }
            menu.show_all
            menu.popup(nil, nil, event.button, event.time)
        end
    }
    evt.signal_connect('button-release-event') { |this, event|
        if $gesture_press
            if (($gesture_press[:y]-event.y)/($gesture_press[:x]-event.x)).abs > 2 && event.y-$gesture_press[:y] > 5
                msg 3, "gesture delete: click-drag right button to the bottom"
                w.destroy
                closures[:delete].call
                $statusbar.push(0, utf8(_("Mouse gesture: delete.")))
            end
        end
    }
    tooltips = Gtk::Tooltips.new
    tooltips.set_tip(evt, File.basename(filename).gsub(/\.jpg/, ''), nil)

    w.signal_connect('key-press-event') { |w,event|
        if event.state & Gdk::Window::CONTROL_MASK != 0 && event.keyval == Gdk::Keyval::GDK_Delete
            w.destroy
            closures[:delete].call
        end
    }

    bottom = Gtk::Alignment.new(0.5, 0.5, 0, 0).add(b = Gtk::Button.new(Gtk::Stock::CLOSE))
    b.signal_connect('clicked') { w.destroy }

    vb = Gtk::VBox.new
    vb.pack_start(evt, false, false)
    vb.pack_end(bottom, false, false)

    w.add(vb)
    w.signal_connect('delete-event') { w.destroy }
    w.window_position = Gtk::Window::POS_CENTER
    w.show_all
end

def scroll_upper(scrolledwindow, ypos_top)
    newval = scrolledwindow.vadjustment.value -
        ((scrolledwindow.vadjustment.value - ypos_top - 1) / scrolledwindow.vadjustment.step_increment + 1) * scrolledwindow.vadjustment.step_increment
    if newval < scrolledwindow.vadjustment.lower
        newval = scrolledwindow.vadjustment.lower
    end
    scrolledwindow.vadjustment.value = newval
end

def scroll_lower(scrolledwindow, ypos_bottom)
    newval = scrolledwindow.vadjustment.value +
        ((ypos_bottom - (scrolledwindow.vadjustment.value + scrolledwindow.vadjustment.page_size) - 1) / scrolledwindow.vadjustment.step_increment + 1) * scrolledwindow.vadjustment.step_increment
    if newval > scrolledwindow.vadjustment.upper - scrolledwindow.vadjustment.page_size
        newval = scrolledwindow.vadjustment.upper - scrolledwindow.vadjustment.page_size
    end
    scrolledwindow.vadjustment.value = newval
end

def autoscroll_if_needed(scrolledwindow, image, textview)
    #- autoscroll if cursor or image is not visible, if possible
    if image && image.window || textview.window
        ypos_top = (image && image.window) ? image.window.position[1] : textview.window.position[1]
        ypos_bottom = max(textview.window.position[1] + textview.window.size[1], image && image.window ? image.window.position[1] + image.window.size[1] : -1)
        current_miny_visible = scrolledwindow.vadjustment.value
        current_maxy_visible = scrolledwindow.vadjustment.value + scrolledwindow.vadjustment.page_size
        if ypos_top < current_miny_visible
            scroll_upper(scrolledwindow, ypos_top)
        elsif ypos_bottom > current_maxy_visible
            scroll_lower(scrolledwindow, ypos_bottom)
        end
    end
end

def create_editzone(scrolledwindow, pagenum, image)
    frame = Gtk::Frame.new
    frame.add(textview = Gtk::TextView.new.set_wrap_mode(Gtk::TextTag::WRAP_WORD))
    frame.set_shadow_type(Gtk::SHADOW_IN)
    textview.signal_connect('key-press-event') { |w, event|
        textview.set_editable(event.keyval != Gdk::Keyval::GDK_Tab)
        if event.keyval == Gdk::Keyval::GDK_Page_Up || event.keyval == Gdk::Keyval::GDK_Page_Down
            scrolledwindow.signal_emit('key-press-event', event)
        end
        if (event.keyval == Gdk::Keyval::GDK_Up || event.keyval == Gdk::Keyval::GDK_Down) &&
           event.state & (Gdk::Window::CONTROL_MASK | Gdk::Window::SHIFT_MASK | Gdk::Window::MOD1_MASK) == 0
            if event.keyval == Gdk::Keyval::GDK_Up
                if scrolledwindow.vadjustment.value >= scrolledwindow.vadjustment.lower + scrolledwindow.vadjustment.step_increment
                    scrolledwindow.vadjustment.value -= scrolledwindow.vadjustment.step_increment
                else
                    scrolledwindow.vadjustment.value = scrolledwindow.vadjustment.lower
                end
            else
                if scrolledwindow.vadjustment.value <= scrolledwindow.vadjustment.upper - scrolledwindow.vadjustment.step_increment - scrolledwindow.vadjustment.page_size
                    scrolledwindow.vadjustment.value += scrolledwindow.vadjustment.step_increment
                else
                    scrolledwindow.vadjustment.value = scrolledwindow.vadjustment.upper - scrolledwindow.vadjustment.page_size
                end
            end
        end
        false  #- propagate
    }
    textview.signal_connect('focus-in-event') { |w, event|
        textview.buffer.select_range(textview.buffer.get_iter_at_offset(0), textview.buffer.get_iter_at_offset(-1))
        false  #- propagate
    }

    candidate_undo_text = nil
    textview.signal_connect('focus-in-event') { |w, event|
        candidate_undo_text = textview.buffer.text
        false  #- propagate
    }
    textview.signal_connect('key-release-event') { |w, event|
        if candidate_undo_text && candidate_undo_text != textview.buffer.text
            $modified = true
            save_undo(_("text edit"),
                      Proc.new { |text|
                          save_text = textview.buffer.text
                          textview.buffer.text = text
                          textview.grab_focus
                          $notebook.set_page(pagenum)
                          Proc.new {
                              textview.buffer.text = save_text
                              textview.grab_focus
                              $notebook.set_page(pagenum)
                          }
                      }, candidate_undo_text)
            candidate_undo_text = nil
        end

        if event.state != 0 || ![Gdk::Keyval::GDK_Page_Up, Gdk::Keyval::GDK_Page_Down, Gdk::Keyval::GDK_Up, Gdk::Keyval::GDK_Down].include?(event.keyval)
            autoscroll_if_needed(scrolledwindow, image, textview)
        end
        false  #- propagate
    }

    return [ frame, textview ]
end

def update_shown_pixbuf(thumbnail_img, img, desired_x, desired_y)

    if !$modified_pixbufs[thumbnail_img]
        $modified_pixbufs[thumbnail_img] = { :orig => img.pixbuf }
    elsif !$modified_pixbufs[thumbnail_img][:orig]
        $modified_pixbufs[thumbnail_img][:orig] = img.pixbuf
    end

    pixbuf = $modified_pixbufs[thumbnail_img][:orig].dup

    #- rotate
    if $modified_pixbufs[thumbnail_img][:angle_to_orig] && $modified_pixbufs[thumbnail_img][:angle_to_orig] != 0
        pixbuf = rotate_pixbuf(pixbuf, $modified_pixbufs[thumbnail_img][:angle_to_orig])
        msg 3, "sizes: #{pixbuf.width} #{pixbuf.height} - desired #{desired_x}x#{desired_x}"
        if pixbuf.height > desired_y
            pixbuf = pixbuf.scale(pixbuf.width * (desired_y.to_f/pixbuf.height), desired_y, Gdk::Pixbuf::INTERP_BILINEAR)
        elsif pixbuf.width < desired_x && pixbuf.height < desired_y
            pixbuf = pixbuf.scale(desired_x, pixbuf.height * (desired_x.to_f/pixbuf.width), Gdk::Pixbuf::INTERP_BILINEAR)
        end
    end

    #- fix white balance
    if $modified_pixbufs[thumbnail_img][:whitebalance]
        pixbuf.whitebalance!($modified_pixbufs[thumbnail_img][:whitebalance])
    end

    img.pixbuf = $modified_pixbufs[thumbnail_img][:pixbuf] = pixbuf
end

def rotate_real(angle, thumbnail_img, img, xmlelem, attributes_prefix, desired_x, desired_y)
    $modified = true

    #- update rotate attribute
    xmlelem.add_attribute("#{attributes_prefix}rotate", (xmlelem.attributes["#{attributes_prefix}rotate"].to_i + angle) % 360)

    $modified_pixbufs[thumbnail_img] ||= {}
    $modified_pixbufs[thumbnail_img][:angle_to_orig] = (($modified_pixbufs[thumbnail_img][:angle_to_orig] || 0) + angle) % 360
    msg 3, "angle: #{angle}, angle to orig: #{$modified_pixbufs[thumbnail_img][:angle_to_orig]}"

    update_shown_pixbuf(thumbnail_img, img, desired_x, desired_y)
end

def rotate(angle, thumbnail_img, img, xmlelem, attributes_prefix, desired_x, desired_y)
    $modified = true

    rotate_real(angle, thumbnail_img, img, xmlelem, attributes_prefix, desired_x, desired_y)

    save_undo(angle == 90 ? _("rotate clockwise") : angle == -90 ? _("rotate counter-clockwise") : _("flip upside-down"),
              Proc.new { |angle|
                  rotate_real(angle, thumbnail_img, img, xmlelem, attributes_prefix, desired_x, desired_y)
                  $notebook.set_page(attributes_prefix != '' ? 0 : 1)
                  Proc.new {
                      rotate_real(-angle, thumbnail_img, img, xmlelem, attributes_prefix, desired_x, desired_y)
                      $notebook.set_page(0)
                      $notebook.set_page(attributes_prefix != '' ? 0 : 1)
                  }
              }, -angle)
end

def color_swap(xmldir, attributes_prefix)
    $modified = true
    if xmldir.attributes["#{attributes_prefix}color-swap"]
        xmldir.delete_attribute("#{attributes_prefix}color-swap")
    else
        xmldir.add_attribute("#{attributes_prefix}color-swap", '1')
    end
end

def enhance(xmldir, attributes_prefix)
    $modified = true
    if xmldir.attributes["#{attributes_prefix}enhance"]
        xmldir.delete_attribute("#{attributes_prefix}enhance")
    else
        xmldir.add_attribute("#{attributes_prefix}enhance", '1')
    end
end

def change_frame_offset(xmldir, attributes_prefix, value)
    $modified = true
    xmldir.add_attribute("#{attributes_prefix}frame-offset", value)
end

def ask_new_frame_offset(xmldir, attributes_prefix)
    if xmldir
        value = xmldir.attributes["#{attributes_prefix}frame-offset"]
    else
        value = ''
    end

    dialog = Gtk::Dialog.new(utf8(_("Change frame offset")),
                             $main_window,
                             Gtk::Dialog::MODAL | Gtk::Dialog::DESTROY_WITH_PARENT,
                             [Gtk::Stock::OK, Gtk::Dialog::RESPONSE_OK],
                             [Gtk::Stock::CANCEL, Gtk::Dialog::RESPONSE_CANCEL])

    lbl = Gtk::Label.new
    lbl.markup = utf8(
_("Please specify the <b>frame offset</b> of the video, to take the thumbnail
from. There are approximately 25 frames per second in a video.
"))
    dialog.vbox.add(lbl)
    dialog.vbox.add(entry = Gtk::Entry.new.set_text(value))
    entry.signal_connect('key-press-event') { |w, event|
        if event.keyval == Gdk::Keyval::GDK_Return
            dialog.response(Gtk::Dialog::RESPONSE_OK)
            true
        elsif event.keyval == Gdk::Keyval::GDK_Escape
            dialog.response(Gtk::Dialog::RESPONSE_CANCEL)
            true
        else
            false  #- propagate if needed
        end
    }
    
    dialog.window_position = Gtk::Window::POS_MOUSE
    dialog.show_all

    dialog.run { |response|
        newval = entry.text
        dialog.destroy
        if response == Gtk::Dialog::RESPONSE_OK
            $modified = true
            msg 3, "changing frame offset to #{newval}"
            return { :old => value, :new => newval }
        else
            return nil
        end
    }
end

def change_pano_amount(xmldir, attributes_prefix, value)
    $modified = true
    if value.nil?
        xmldir.delete_attribute("#{attributes_prefix}pano-amount")
    else
        xmldir.add_attribute("#{attributes_prefix}pano-amount", value)
    end
end

def ask_new_pano_amount(xmldir, attributes_prefix)
    if xmldir
        value = xmldir.attributes["#{attributes_prefix}pano-amount"]
    else
        value = ''
    end

    dialog = Gtk::Dialog.new(utf8(_("Specify panorama amount")),
                             $main_window,
                             Gtk::Dialog::MODAL | Gtk::Dialog::DESTROY_WITH_PARENT,
                             [Gtk::Stock::OK, Gtk::Dialog::RESPONSE_OK],
                             [Gtk::Stock::CANCEL, Gtk::Dialog::RESPONSE_CANCEL])

    lbl = Gtk::Label.new
    lbl.markup = utf8(
_("Please specify the <b>panorama 'amount'</b> of the image, which indicates the width
of this panorama image compared to other regular images. For example, if the panorama
was taken out of four photos on one row, counting the necessary overlap, the width of
this panorama image should probably be roughly three times the width of regular images.

With this information, booh will be able to generate panorama thumbnails looking
the right 'size'.
"))
    dialog.vbox.add(lbl)
    dialog.vbox.add(Gtk::Alignment.new(0.5, 0.5, 0, 0).add(Gtk::HBox.new.add(rb_no = Gtk::RadioButton.new(utf8(_("none (not a panorama image)")))).
                                                                         add(rb_yes = Gtk::RadioButton.new(rb_no, utf8(_("amount of: ")))).
                                                                         add(spin = Gtk::SpinButton.new(1, 8, 0.1)).
                                                                         add(Gtk::Label.new(utf8(_("times the width of other images"))))))
    dialog.window_position = Gtk::Window::POS_MOUSE
    dialog.show_all
    if value
        spin.value = value.to_f
        rb_yes.active = true
        spin.grab_focus
    else
        rb_no.active = true
    end

    dialog.run { |response|
        if rb_no.active?
            newval = nil
        else
            newval = spin.value.to_f
        end
        dialog.destroy
        if response == Gtk::Dialog::RESPONSE_OK
            $modified = true
            msg 3, "changing panorama amount to #{newval}"
            return { :old => value, :new => newval }
        else
            return nil
        end
    }
end

def change_whitebalance(xmlelem, attributes_prefix, value)
    $modified = true
    xmlelem.add_attribute("#{attributes_prefix}white-balance", value)
end

def recalc_whitebalance(level, orig, thumbnail_img, img, xmlelem, attributes_prefix, desired_x, desired_y, infotype)

    #- in case the white balance was already modified in the config file and thumbnail, we cannot just revert, we need to use original file
    if (!$modified_pixbufs[thumbnail_img] || !$modified_pixbufs[thumbnail_img][:whitebalance]) && xmlelem.attributes["#{attributes_prefix}white-balance"]
        save_whitebalance = xmlelem.attributes["#{attributes_prefix}white-balance"]
        xmlelem.delete_attribute("#{attributes_prefix}white-balance")
        destfile = "#{thumbnail_img}-orig-whitebalance.jpg"
        gen_real_thumbnail_core(attributes_prefix == '' ? 'element' : 'subdir', orig, destfile,
                                xmlelem, attributes_prefix == '' ? $default_size['thumbnails'] : $albums_thumbnail_size, infotype)
        $modified_pixbufs[thumbnail_img] ||= {}
        $modified_pixbufs[thumbnail_img][:orig] = pixbuf_or_nil(destfile)
        xmlelem.add_attribute("#{attributes_prefix}white-balance", save_whitebalance)
        $modified_pixbufs[thumbnail_img][:angle_to_orig] = 0
    end

    $modified_pixbufs[thumbnail_img] ||= {}
    $modified_pixbufs[thumbnail_img][:whitebalance] = level.to_f

    update_shown_pixbuf(thumbnail_img, img, desired_x, desired_y)
end

def ask_whitebalance(orig, thumbnail_img, img_, xmlelem, attributes_prefix, desired_x, desired_y, infotype)
    #- init $modified_pixbufs correctly
#    update_shown_pixbuf(thumbnail_img, img_, desired_x, desired_y)

    value = xmlelem.attributes["#{attributes_prefix}white-balance"] || "0"

    dialog = Gtk::Dialog.new(utf8(_("Fix white balance")),
                             $main_window,
                             Gtk::Dialog::MODAL | Gtk::Dialog::DESTROY_WITH_PARENT,
                             [Gtk::Stock::OK, Gtk::Dialog::RESPONSE_OK],
                             [Gtk::Stock::CANCEL, Gtk::Dialog::RESPONSE_CANCEL])

    lbl = Gtk::Label.new
    lbl.markup = utf8(
_("You can fix the <b>white balance</b> of the image, if your image is too blue
or too yellow because your camera didn't detect the light correctly. Drag the
slider below the image to the left for more blue, to the right for more yellow.
"))
    dialog.vbox.add(lbl)
    dialog.vbox.add(evt = Gtk::EventBox.new.add(img = Gtk::Image.new(img_.pixbuf)))
    dialog.vbox.add(hs = Gtk::HScale.new(-200, 200, 1).set_value(value.to_i))
    
    dialog.window_position = Gtk::Window::POS_MOUSE
    dialog.show_all

    lastval = nil
    timeout = Gtk.timeout_add(100) {
        if hs.value != lastval
            lastval = hs.value
            recalc_whitebalance(lastval, orig, thumbnail_img, img, xmlelem, attributes_prefix, desired_x, desired_y, infotype)
        end
        true
    }

    dialog.run { |response|
        Gtk.timeout_remove(timeout)
        if response == Gtk::Dialog::RESPONSE_OK
            $modified = true
            newval = hs.value.to_s
            msg 3, "changing white balance to #{newval}"
            dialog.destroy
            return { :old => value, :new => newval }
        else
            $modified_pixbufs[thumbnail_img] ||= {}
            $modified_pixbufs[thumbnail_img][:whitebalance] = value.to_f
            $modified_pixbufs[thumbnail_img][:pixbuf] = img_.pixbuf
            dialog.destroy
            return nil
        end
    }
end

def gen_real_thumbnail_core(type, origfile, destfile, xmldir, size, infotype)
    system("rm -f '#{destfile}'")
    #- type can be 'element' or 'subdir'
    if type == 'element'
        gen_thumbnails_element(origfile, xmldir, false, [ { 'filename' => destfile, 'size' => size } ])
    else
        gen_thumbnails_subdir(origfile, xmldir, false, [ { 'filename' => destfile, 'size' => size } ], infotype)
    end
end

def gen_real_thumbnail(type, origfile, destfile, xmldir, size, img, infotype)
    Thread.new {
        push_mousecursor_wait
        gen_real_thumbnail_core(type, origfile, destfile, xmldir, size, infotype)
        gtk_thread_protect {
            puts "destroyed: " + img.destroyed?.to_s
            img.set(destfile)
            $modified_pixbufs[destfile] = { :orig => img.pixbuf, :pixbuf => img.pixbuf, :angle_to_orig => 0 }
        }
        pop_mousecursor
    }
end

def popup_thumbnail_menu(event, optionals, type, xmldir, attributes_prefix, possible_actions, closures)
    distribute_multiple_call = Proc.new { |action, arg|
        $selected_elements.each_key { |path|
            $name2widgets[path][:img].pixbuf = $selected_elements[path][:pixbuf]
        }
        if possible_actions[:can_multiple] && $selected_elements.length > 0
            UndoHandler.begin_batch
            $selected_elements.each_key { |k| $name2closures[k][action].call(arg) }
            UndoHandler.end_batch
        else
            closures[action].call(arg)
        end
        $selected_elements = {}
    }
    menu = Gtk::Menu.new
    if optionals.include?('change_image')
        menu.append(changeimg = Gtk::ImageMenuItem.new(utf8(_("Change image"))))
        changeimg.image = Gtk::Image.new("#{$FPATH}/images/stock-images-16.png")
        changeimg.signal_connect('activate') { closures[:change].call }
        menu.append(            Gtk::SeparatorMenuItem.new)
    end
    if closures[:view]
        if type == 'image'
            menu.append(view = Gtk::ImageMenuItem.new(utf8(_("View larger"))))
            view.image = Gtk::Image.new("#{$FPATH}/images/stock-view-16.png")
            view.signal_connect('activate') { closures[:view].call }
            menu.append(               Gtk::SeparatorMenuItem.new)
        else
            menu.append(view = Gtk::ImageMenuItem.new(utf8(_("Play video"))))
            view.image = Gtk::Image.new("#{$FPATH}/images/stock-video-16.png")
            view.signal_connect('activate') { closures[:view].call }
            menu.append(               Gtk::SeparatorMenuItem.new)
        end
    end
    menu.append(r90 = Gtk::ImageMenuItem.new(utf8(_("Rotate clockwise"))))
    r90.image = Gtk::Image.new("#{$FPATH}/images/stock-rotate-90-16.png")
    r90.signal_connect('activate') { distribute_multiple_call.call(:rotate, 90) }
    menu.append(r270 = Gtk::ImageMenuItem.new(utf8(_("Rotate counter-clockwise"))))
    r270.image = Gtk::Image.new("#{$FPATH}/images/stock-rotate-270-16.png")
    r270.signal_connect('activate') { distribute_multiple_call.call(:rotate, -90) }
    if !possible_actions[:can_multiple] || $selected_elements.length == 0
        menu.append(               Gtk::SeparatorMenuItem.new)
        if !possible_actions[:forbid_left]
            menu.append(moveleft = Gtk::ImageMenuItem.new(utf8(_("Move left"))))
            moveleft.image = Gtk::Image.new("#{$FPATH}/images/stock-move-left.png")
            moveleft.signal_connect('activate') { closures[:move].call('left') }
            if !possible_actions[:can_left]
                moveleft.sensitive = false
            end
        end
        if !possible_actions[:forbid_right]
            menu.append(moveright = Gtk::ImageMenuItem.new(utf8(_("Move right"))))
            moveright.image = Gtk::Image.new("#{$FPATH}/images/stock-move-right.png")
            moveright.signal_connect('activate') { closures[:move].call('right') }
            if !possible_actions[:can_right]
                moveright.sensitive = false
            end
        end
        menu.append(moveup = Gtk::ImageMenuItem.new(utf8(_("Move up"))))
        moveup.image = Gtk::Image.new("#{$FPATH}/images/stock-move-up.png")
        moveup.signal_connect('activate') { closures[:move].call('up') }
        if !possible_actions[:can_up]
            moveup.sensitive = false
        end
        menu.append(movedown = Gtk::ImageMenuItem.new(utf8(_("Move down"))))
        movedown.image = Gtk::Image.new("#{$FPATH}/images/stock-move-down.png")
        movedown.signal_connect('activate') { closures[:move].call('down') }
        if !possible_actions[:can_down]
            movedown.sensitive = false
        end
    end
    if type == 'video'
        if !possible_actions[:can_multiple] || $selected_elements.length == 0 || $selected_elements.reject { |k,v| $name2widgets[k][:type] == 'video' }.empty?
            menu.append(               Gtk::SeparatorMenuItem.new)
            menu.append(  color_swap = Gtk::ImageMenuItem.new(utf8(_("Red/blue color swap"))))
            color_swap.image = Gtk::Image.new("#{$FPATH}/images/stock-color-triangle-16.png")
            color_swap.signal_connect('activate') { distribute_multiple_call.call(:color_swap) }
            menu.append(        flip = Gtk::ImageMenuItem.new(utf8(_("Flip upside-down"))))
            flip.image = Gtk::Image.new("#{$FPATH}/images/stock-rotate-180-16.png")
            flip.signal_connect('activate') { distribute_multiple_call.call(:rotate, 180) }
            menu.append(frame_offset = Gtk::ImageMenuItem.new(utf8(_("Specify frame offset"))))
            frame_offset.image = Gtk::Image.new("#{$FPATH}/images/stock-video-16.png")
            frame_offset.signal_connect('activate') {
                if possible_actions[:can_multiple] && $selected_elements.length > 0
                    if values = ask_new_frame_offset(nil, '')
                        distribute_multiple_call.call(:frame_offset, values)
                    end
                else
                    closures[:frame_offset].call
                end
            }
        end
    end
    menu.append(               Gtk::SeparatorMenuItem.new)
    if !possible_actions[:can_multiple] || $selected_elements.length == 0
        menu.append(whitebalance = Gtk::ImageMenuItem.new(utf8(_("Fix white-balance"))))
        whitebalance.image = Gtk::Image.new("#{$FPATH}/images/stock-tool-color-balance-16.png")
        whitebalance.signal_connect('activate') { closures[:whitebalance].call }
    end
    if !possible_actions[:can_multiple] || $selected_elements.length == 0
        menu.append(enhance = Gtk::ImageMenuItem.new(utf8(xmldir.attributes["#{attributes_prefix}enhance"] ? _("Original contrast") :
                                                                                                             _("Enhance constrast"))))
    else
        menu.append(enhance = Gtk::ImageMenuItem.new(utf8(_("Toggle contrast enhancement"))))
    end
    enhance.image = Gtk::Image.new("#{$FPATH}/images/stock-channels-16.png")
    enhance.signal_connect('activate') { distribute_multiple_call.call(:enhance) }
    if type == 'image' && possible_actions[:can_panorama]
        menu.append(panorama = Gtk::ImageMenuItem.new(utf8(_("Set as panorama"))))
        panorama.image = Gtk::Image.new("#{$FPATH}/images/stock-images-16.png")
        panorama.signal_connect('activate') { closures[:pano].call }
    end
    if optionals.include?('delete')
        menu.append(               Gtk::SeparatorMenuItem.new)
        menu.append(cut_item     = Gtk::ImageMenuItem.new(Gtk::Stock::CUT))
        cut_item.signal_connect('activate') { distribute_multiple_call.call(:cut) }
        if !possible_actions[:can_multiple] || $selected_elements.length == 0
            menu.append(paste_item   = Gtk::ImageMenuItem.new(Gtk::Stock::PASTE))
            paste_item.signal_connect('activate') { closures[:paste].call }
            menu.append(clear_item   = Gtk::ImageMenuItem.new(Gtk::Stock::CLEAR))
            clear_item.signal_connect('activate') { $cuts = [] }
            if $cuts.size == 0
                paste_item.sensitive = clear_item.sensitive = false
            end
        end
        menu.append(               Gtk::SeparatorMenuItem.new)
        menu.append(delete_item  = Gtk::ImageMenuItem.new(Gtk::Stock::DELETE))
        delete_item.signal_connect('activate') { distribute_multiple_call.call(:delete) }
    end
    menu.show_all
    menu.popup(nil, nil, event.button, event.time)
end

def add_thumbnail(autotable, filename, type, thumbnail_img, caption)

    img = nil
    frame1 = Gtk::Frame.new
    fullpath = from_utf8("#{$current_path}/#{filename}")

    my_gen_real_thumbnail = proc {
        gen_real_thumbnail('element', fullpath, thumbnail_img, $xmldir, $default_size['thumbnails'], img, '')
    }

    #- generate the thumbnail if missing (if image was rotated but booh was not relaunched)
    if !$modified_pixbufs[thumbnail_img] && !File.exists?(thumbnail_img)
        frame1.add(img = Gtk::Image.new)
        my_gen_real_thumbnail.call
    else
        frame1.add(img = Gtk::Image.new($modified_pixbufs[thumbnail_img] ? $modified_pixbufs[thumbnail_img][:pixbuf] : thumbnail_img))
    end
    evtbox = Gtk::EventBox.new.add(Gtk::Alignment.new(0.5, 0.5, 0, 0).add(frame1.set_shadow_type(Gtk::SHADOW_ETCHED_OUT)))

    tooltips = Gtk::Tooltips.new
    tipname = from_utf8(File.basename(filename).gsub(/\.[^\.]+$/, ''))
    tooltips.set_tip(evtbox, utf8(type == 'video' ? (_("%s (video - %s KB)") % [tipname, commify(file_size(fullpath)/1024)]) : tipname), nil)

    frame2, textview = create_editzone($autotable_sw, 1, img)
    textview.buffer.text = utf8(caption)
    textview.set_justification(Gtk::Justification::CENTER)

    vbox = Gtk::VBox.new(false, 5)
    vbox.pack_start(evtbox, false, false)
    vbox.pack_start(frame2, false, false)
    autotable.append(vbox, filename)

    #- to be able to grab focus of textview when retrieving vbox's position from AutoTable
    $vbox2widgets[vbox] = { :textview => textview, :image => img }

    #- to be able to find widgets by name
    $name2widgets[filename] = { :textview => textview, :evtbox => evtbox, :vbox => vbox, :img => img, :type => type }

    cleanup_all_thumbnails = Proc.new {
        #- remove out of sync images
        dest_img_base = build_full_dest_filename(filename).sub(/\.[^\.]+$/, '')
        for sizeobj in $images_size
            system("rm -f #{dest_img_base}-#{sizeobj['fullscreen']}.jpg #{dest_img_base}-#{sizeobj['thumbnails']}.jpg")
        end

    }

    rotate_and_cleanup = Proc.new { |angle|
        rotate(angle, thumbnail_img, img, $xmldir.elements["*[@filename='#{filename}']"], '', $default_thumbnails[:x], $default_thumbnails[:y])
        cleanup_all_thumbnails.call
    }

    move = Proc.new { |direction|
        do_method = "move_#{direction}"
        undo_method = "move_" + case direction; when 'left'; 'right'; when 'right'; 'left'; when 'up'; 'down'; when 'down'; 'up' end
        perform = Proc.new {
            done = autotable.method(do_method).call(vbox)
            textview.grab_focus  #- because if moving, focus is stolen
            done
        }
        if perform.call
            save_undo(_("move %s") % direction,
                      Proc.new {
                          autotable.method(undo_method).call(vbox)
                          textview.grab_focus  #- because if moving, focus is stolen
                          autoscroll_if_needed($autotable_sw, img, textview)
                          $notebook.set_page(1)
                          Proc.new {
                              autotable.method(do_method).call(vbox)
                              textview.grab_focus  #- because if moving, focus is stolen
                              autoscroll_if_needed($autotable_sw, img, textview)
                              $notebook.set_page(1)
                          }
                      })
        end
    }

    color_swap_and_cleanup = Proc.new {
        perform_color_swap_and_cleanup = Proc.new {
            color_swap($xmldir.elements["*[@filename='#{filename}']"], '')
            my_gen_real_thumbnail.call
        }

        cleanup_all_thumbnails.call
        perform_color_swap_and_cleanup.call

        save_undo(_("color swap"),
                  Proc.new {
                      perform_color_swap_and_cleanup.call
                      textview.grab_focus
                      autoscroll_if_needed($autotable_sw, img, textview)
                      $notebook.set_page(1)
                      Proc.new {
                          perform_color_swap_and_cleanup.call
                          textview.grab_focus
                          autoscroll_if_needed($autotable_sw, img, textview)
                          $notebook.set_page(1)
                      }
                  })
    }

    change_frame_offset_and_cleanup_real = Proc.new { |values|
        perform_change_frame_offset_and_cleanup = Proc.new { |val|
            change_frame_offset($xmldir.elements["*[@filename='#{filename}']"], '', val)
            my_gen_real_thumbnail.call
        }
        perform_change_frame_offset_and_cleanup.call(values[:new])
        
        save_undo(_("specify frame offset"),
                  Proc.new {
                      perform_change_frame_offset_and_cleanup.call(values[:old])
                      textview.grab_focus
                      autoscroll_if_needed($autotable_sw, img, textview)
                      $notebook.set_page(1)
                      Proc.new {
                          perform_change_frame_offset_and_cleanup.call(values[:new])
                          textview.grab_focus
                          autoscroll_if_needed($autotable_sw, img, textview)
                          $notebook.set_page(1)
                      }
                  })
    }

    change_frame_offset_and_cleanup = Proc.new {
        if values = ask_new_frame_offset($xmldir.elements["*[@filename='#{filename}']"], '')
            change_frame_offset_and_cleanup_real.call(values)
        end
    }

    change_pano_amount_and_cleanup_real = Proc.new { |values|
        perform_change_pano_amount_and_cleanup = Proc.new { |val|
            change_pano_amount($xmldir.elements["*[@filename='#{filename}']"], '', val)
        }
        perform_change_pano_amount_and_cleanup.call(values[:new])
        
        save_undo(_("change panorama amount"),
                  Proc.new {
                      perform_change_pano_amount_and_cleanup.call(values[:old])
                      textview.grab_focus
                      autoscroll_if_needed($autotable_sw, img, textview)
                      $notebook.set_page(1)
                      Proc.new {
                          perform_change_pano_amount_and_cleanup.call(values[:new])
                          textview.grab_focus
                          autoscroll_if_needed($autotable_sw, img, textview)
                          $notebook.set_page(1)
                      }
                  })
    }

    change_pano_amount_and_cleanup = Proc.new {
        if values = ask_new_pano_amount($xmldir.elements["*[@filename='#{filename}']"], '')
            change_pano_amount_and_cleanup_real.call(values)
        end
    }

    whitebalance_and_cleanup = Proc.new {
        if values = ask_whitebalance(fullpath, thumbnail_img, img,
                                     $xmldir.elements["*[@filename='#{filename}']"], '', $default_thumbnails[:x], $default_thumbnails[:y], '')
            perform_change_whitebalance_and_cleanup = Proc.new { |val|
                change_whitebalance($xmldir.elements["*[@filename='#{filename}']"], '', val)
                recalc_whitebalance(val, fullpath, thumbnail_img, img,
                                    $xmldir.elements["*[@filename='#{filename}']"], '', $default_thumbnails[:x], $default_thumbnails[:y], '')
                cleanup_all_thumbnails.call
            }
            perform_change_whitebalance_and_cleanup.call(values[:new])

            save_undo(_("fix white balance"),
                      Proc.new {
                          perform_change_whitebalance_and_cleanup.call(values[:old])
                          textview.grab_focus
                          autoscroll_if_needed($autotable_sw, img, textview)
                          $notebook.set_page(1)
                          Proc.new {
                              perform_change_whitebalance_and_cleanup.call(values[:new])
                              textview.grab_focus
                              autoscroll_if_needed($autotable_sw, img, textview)
                              $notebook.set_page(1)
                          }
                      })
        end
    }

    enhance_and_cleanup = Proc.new {
        perform_enhance_and_cleanup = Proc.new {
            enhance($xmldir.elements["*[@filename='#{filename}']"], '')
            my_gen_real_thumbnail.call
        }

        cleanup_all_thumbnails.call
        perform_enhance_and_cleanup.call

        save_undo(_("enhance"),
                  Proc.new {
                      perform_enhance_and_cleanup.call
                      textview.grab_focus
                      autoscroll_if_needed($autotable_sw, img, textview)
                      $notebook.set_page(1)
                      Proc.new {
                          perform_enhance_and_cleanup.call
                          textview.grab_focus
                          autoscroll_if_needed($autotable_sw, img, textview)
                          $notebook.set_page(1)
                      }
                  })
    }

    delete = Proc.new { |isacut|
        if autotable.current_order.size > 1 || show_popup($main_window, utf8(_("Do you confirm this subalbum needs to be completely removed?")), { :okcancel => true })
            $modified = true
            after = nil
            perform_delete = Proc.new {
                after = autotable.get_next_widget(vbox)
                if !after
                    after = autotable.get_previous_widget(vbox)
                end
                if $config['deleteondisk'] && !isacut
                    msg 3, "scheduling for delete: #{fullpath}"
                    $todelete << fullpath
                end
                autotable.remove(vbox)
                if after
                    $vbox2widgets[after][:textview].grab_focus
                    autoscroll_if_needed($autotable_sw, $vbox2widgets[after][:image], $vbox2widgets[after][:textview])
                end
            }
            
            previous_pos = autotable.get_current_number(vbox)
            perform_delete.call

            if !after
                if $xmldir.child_byname_notattr('dir', 'deleted')
                    $xmldir.delete_attribute('thumbnails-caption')
                    $xmldir.delete_attribute('thumbnails-captionfile')
                else
                    $xmldir.add_attribute('deleted', 'true')
                    moveup = $xmldir
                    while moveup.parent.name == 'dir'
                        moveup = moveup.parent
                        if !moveup.child_byname_notattr('dir', 'deleted') && !moveup.child_byname_notattr('image', 'deleted') && !moveup.child_byname_notattr('video', 'deleted')
                            moveup.add_attribute('deleted', 'true')
                        else
                            break
                        end
                    end
                end
                save_changes('forced')
                populate_subalbums_treeview
            else
                save_undo(_("delete"),
                          Proc.new { |pos|
                              autotable.reinsert(pos, vbox, filename)
                              $notebook.set_page(1)
                              autotable.queue_draws << proc { textview.grab_focus; autoscroll_if_needed($autotable_sw, img, textview) }
                              $cuts = []
                              msg 3, "removing deletion schedule of: #{fullpath}"
                              $todelete.delete(fullpath)  #- unconditional because deleteondisk option could have been modified
                              Proc.new {
                                  perform_delete.call
                                  $notebook.set_page(1)
                              }
                          }, previous_pos)
            end
        end
    }

    cut = Proc.new {
        delete.call(true)
        $cuts << { :vbox => vbox, :filename => filename }
        $statusbar.push(0, utf8(_("%s elements in the clipboard.") % $cuts.size ))
    }
    paste = Proc.new {
        if $cuts.size > 0
            $cuts.each { |elem|
                autotable.reinsert(autotable.get_current_number(vbox), elem[:vbox], elem[:filename])
            }
            last = $cuts[-1]
            autotable.queue_draws << proc {
                $vbox2widgets[last[:vbox]][:textview].grab_focus
                autoscroll_if_needed($autotable_sw, $vbox2widgets[last[:vbox]][:image], $vbox2widgets[last[:vbox]][:textview])
            }
            save_undo(_("paste"),
                      Proc.new { |cuts|
                          cuts.each { |elem| autotable.remove(elem[:vbox]) }
                          $notebook.set_page(1)
                          Proc.new {
                              cuts.each { |elem|
                                  autotable.reinsert(autotable.get_current_number(vbox), elem[:vbox], elem[:filename])
                              }
                              $notebook.set_page(1)
                          }
                      }, $cuts)
            $statusbar.push(0, utf8(_("Pasted %s elements.") % $cuts.size ))
            $cuts = []
        end
    }

    $name2closures[filename] = { :rotate => rotate_and_cleanup, :enhance => enhance_and_cleanup, :delete => delete, :cut => cut,
                                 :color_swap => color_swap_and_cleanup, :frame_offset => change_frame_offset_and_cleanup_real,
                                 :pano => change_pano_amount_and_cleanup }

    textview.signal_connect('key-press-event') { |w, event|
        propagate = true
        if event.state != 0
            x, y = autotable.get_current_pos(vbox)
            control_pressed = event.state & Gdk::Window::CONTROL_MASK != 0
            shift_pressed = event.state & Gdk::Window::SHIFT_MASK != 0
            alt_pressed = event.state & Gdk::Window::MOD1_MASK != 0
            if event.keyval == Gdk::Keyval::GDK_Up && y > 0
                if control_pressed
                    if widget_up = autotable.get_widget_at_pos(x, y - 1)
                        $vbox2widgets[widget_up][:textview].grab_focus
                    end
                end
                if shift_pressed
                    move.call('up')
                end
            end
            if event.keyval == Gdk::Keyval::GDK_Down && y < autotable.get_max_y
                if control_pressed
                    if widget_down = autotable.get_widget_at_pos(x, y + 1)
                        $vbox2widgets[widget_down][:textview].grab_focus
                    end
                end
                if shift_pressed
                    move.call('down')
                end
            end
            if event.keyval == Gdk::Keyval::GDK_Left
                if x > 0
                    if control_pressed
                        $vbox2widgets[autotable.get_previous_widget(vbox)][:textview].grab_focus
                    end
                    if shift_pressed
                        move.call('left')
                    end
                end
                if alt_pressed
                    rotate_and_cleanup.call(-90)
                end
            end
            if event.keyval == Gdk::Keyval::GDK_Right
                next_ = autotable.get_next_widget(vbox)
                if next_ && autotable.get_current_pos(next_)[0] > x
                    if control_pressed
                        $vbox2widgets[next_][:textview].grab_focus
                    end
                    if shift_pressed
                        move.call('right')
                    end
                end
                if alt_pressed
                    rotate_and_cleanup.call(90)
                end
            end
            if event.keyval == Gdk::Keyval::GDK_Delete && control_pressed
                delete.call(false)
            end
            if event.keyval == Gdk::Keyval::GDK_Return && control_pressed
                view_element(filename, { :delete => delete })
                propagate = false
            end
            if event.keyval == Gdk::Keyval::GDK_z && control_pressed
                perform_undo
            end
            if event.keyval == Gdk::Keyval::GDK_r && control_pressed
                perform_redo
            end
        end
        !propagate  #- propagate if needed
    }

    $ignore_next_release = false
    evtbox.signal_connect('button-press-event') { |w, event|
        if event.event_type == Gdk::Event::BUTTON_PRESS && event.button == 1
            if event.state & Gdk::Window::BUTTON3_MASK != 0
                #- gesture redo: hold right mouse button then click left mouse button
                $config['nogestures'] or perform_redo
                $ignore_next_release = true
            else
                shift_or_control = event.state & Gdk::Window::SHIFT_MASK != 0 || event.state & Gdk::Window::CONTROL_MASK != 0
                if $r90.active?
                    rotate_and_cleanup.call(shift_or_control ? -90 : 90)
                elsif $r270.active?
                    rotate_and_cleanup.call(shift_or_control ? 90 : -90)
                elsif $enhance.active?
                    enhance_and_cleanup.call
                elsif $delete.active?
                    delete.call(false)
                else
                    textview.grab_focus
                    $config['nogestures'] or $gesture_press = { :filename => filename, :x => event.x, :y => event.y }
                end
            end
            $button1_pressed_autotable = true
        elsif event.event_type == Gdk::Event::BUTTON_PRESS && event.button == 3
            if event.state & Gdk::Window::BUTTON1_MASK != 0
                #- gesture undo: hold left mouse button then click right mouse button
                $config['nogestures'] or perform_undo
                $ignore_next_release = true
            end
        elsif event.event_type == Gdk::Event::BUTTON2_PRESS && event.button == 1
            view_element(filename, { :delete => delete })
        end
        false   #- propagate
    }

    evtbox.signal_connect('button-release-event') { |w, event|
        if event.event_type == Gdk::Event::BUTTON_RELEASE && event.button == 3
            if !$ignore_next_release
                x, y = autotable.get_current_pos(vbox)
                next_ = autotable.get_next_widget(vbox)
                popup_thumbnail_menu(event, ['delete'], type, $xmldir.elements["*[@filename='#{filename}']"], '',
                                     { :can_left => x > 0, :can_right => next_ && autotable.get_current_pos(next_)[0] > x,
                                       :can_up => y > 0, :can_down => y < autotable.get_max_y, :can_multiple => true, :can_panorama => true },
                                     { :rotate => rotate_and_cleanup, :move => move, :color_swap => color_swap_and_cleanup, :enhance => enhance_and_cleanup,
                                       :frame_offset => change_frame_offset_and_cleanup, :delete => delete, :whitebalance => whitebalance_and_cleanup,
                                       :cut => cut, :paste => paste, :view => proc { view_element(filename, { :delete => delete }) },
                                       :pano => change_pano_amount_and_cleanup })
            end
            $ignore_next_release = false
            $gesture_press = nil
        end
        false   #- propagate
    }

    #- handle reordering with drag and drop
    Gtk::Drag.source_set(vbox, Gdk::Window::BUTTON1_MASK, [['reorder-elements', Gtk::Drag::TARGET_SAME_APP, 1]], Gdk::DragContext::ACTION_MOVE)
    Gtk::Drag.dest_set(vbox, Gtk::Drag::DEST_DEFAULT_ALL, [['reorder-elements', Gtk::Drag::TARGET_SAME_APP, 1]], Gdk::DragContext::ACTION_MOVE)
    vbox.signal_connect('drag-data-get') { |w, ctxt, selection_data, info, time|
        selection_data.set(Gdk::Selection::TYPE_STRING, autotable.get_current_number(vbox).to_s)
    }

    vbox.signal_connect('drag-data-received') { |w, ctxt, x, y, selection_data, info, time|
        done = false
        #- mouse gesture first (dnd disables button-release-event)
        if $gesture_press && $gesture_press[:filename] == filename
            if (($gesture_press[:x]-x)/($gesture_press[:y]-y)).abs > 2 && ($gesture_press[:x]-x).abs > 5
                angle = x-$gesture_press[:x] > 0 ? 90 : -90
                msg 3, "gesture rotate: #{angle}: click-drag right button to the left/right"
                rotate_and_cleanup.call(angle)
                $statusbar.push(0, utf8(_("Mouse gesture: rotate.")))
                done = true
            elsif (($gesture_press[:y]-y)/($gesture_press[:x]-x)).abs > 2 && y-$gesture_press[:y] > 5
                msg 3, "gesture delete: click-drag right button to the bottom"
                delete.call(false)
                $statusbar.push(0, utf8(_("Mouse gesture: delete.")))
                done = true
            end
        end
        if !done
            ctxt.targets.each { |target|
                if target.name == 'reorder-elements'
                    move_dnd = Proc.new { |from,to|
                        if from != to
                            $modified = true
                            autotable.move(from, to)
                            save_undo(_("reorder"),
                                      Proc.new { |from, to|
                                          if to > from
                                              autotable.move(to - 1, from)
                                          else
                                              autotable.move(to, from + 1)
                                          end
                                          $notebook.set_page(1)
                                          Proc.new {
                                              autotable.move(from, to)
                                              $notebook.set_page(1)
                                          }
                                      }, from, to)
                        end
                    }
                    if $multiple_dnd.size == 0
                        move_dnd.call(selection_data.data.to_i,
                                      autotable.get_current_number(vbox))
                    else
                        UndoHandler.begin_batch
                        $multiple_dnd.sort { |a,b| autotable.get_current_number($name2widgets[a][:vbox]) <=> autotable.get_current_number($name2widgets[b][:vbox]) }.
                                      each { |path|
                            #- need to update current position between each call
                            move_dnd.call(autotable.get_current_number($name2widgets[path][:vbox]),
                                          autotable.get_current_number(vbox))
                        }
                        UndoHandler.end_batch
                    end
                    $multiple_dnd = []
                end
            }
        end
    }

    vbox.show_all
end

def create_auto_table

    $autotable = Gtk::AutoTable.new(5)

    $autotable_sw = Gtk::ScrolledWindow.new(nil, nil)
    thumbnails_vb = Gtk::VBox.new(false, 5)

    frame, $thumbnails_title = create_editzone($autotable_sw, 0, nil)
    $thumbnails_title.set_justification(Gtk::Justification::CENTER)
    thumbnails_vb.pack_start(Gtk::Alignment.new(0.5, 0.5, 0.5, 0).add(frame), false, false)
    thumbnails_vb.add($autotable)

    $autotable_sw.set_policy(Gtk::POLICY_NEVER, Gtk::POLICY_ALWAYS)
    $autotable_sw.add_with_viewport(thumbnails_vb)

    #- follows stuff for handling multiple elements selection
    press_x = nil; press_y = nil; pos_x = nil; pos_y = nil; $selected_elements = {}
    gc = nil
    update_selected = Proc.new {
        $autotable.current_order.each { |path|
            w = $name2widgets[path][:evtbox].window
            xm = w.position[0] + w.size[0]/2
            ym = w.position[1] + w.size[1]/2
            if ym < press_y && ym > pos_y || ym < pos_y && ym > press_y
                if (xm < press_x && xm > pos_x || xm < pos_x && xm > press_x) && ! $selected_elements[path]
                    $selected_elements[path] = { :pixbuf => $name2widgets[path][:img].pixbuf }
                    $name2widgets[path][:img].pixbuf = $name2widgets[path][:img].pixbuf.saturate_and_pixelate(1, true)
                end
            end
            if $selected_elements[path] && ! $selected_elements[path][:keep]
                if ((xm < press_x && xm < pos_x || xm > pos_x && xm > press_x) || (ym < press_y && ym < pos_y || ym > pos_y && ym > press_y))
                    $name2widgets[path][:img].pixbuf = $selected_elements[path][:pixbuf]
                    $selected_elements.delete(path)
                end
            end
        }
    }
    $autotable.signal_connect('realize') { |w,e|
        gc = Gdk::GC.new($autotable.window)
        gc.set_line_attributes(1, Gdk::GC::LINE_ON_OFF_DASH, Gdk::GC::CAP_PROJECTING, Gdk::GC::JOIN_ROUND)
        gc.function = Gdk::GC::INVERT
        #- autoscroll handling for DND and multiple selections
        Gtk.timeout_add(100) {
            w, x, y, mask = $autotable.window.pointer
            if mask & Gdk::Window::BUTTON1_MASK != 0
                if y < $autotable_sw.vadjustment.value
                    if pos_x
                        $autotable.window.draw_lines(gc, [[press_x, press_y], [pos_x, press_y], [pos_x, pos_y], [press_x, pos_y], [press_x, press_y]])
                    end
                    if $button1_pressed_autotable || press_x
                        scroll_upper($autotable_sw, y)
                    end
                    if not press_x.nil?
                        w, pos_x, pos_y = $autotable.window.pointer
                        $autotable.window.draw_lines(gc, [[press_x, press_y], [pos_x, press_y], [pos_x, pos_y], [press_x, pos_y], [press_x, press_y]])
                        update_selected.call
                    end
                end
                if y > $autotable_sw.vadjustment.value + $autotable_sw.vadjustment.page_size
                    if pos_x
                        $autotable.window.draw_lines(gc, [[press_x, press_y], [pos_x, press_y], [pos_x, pos_y], [press_x, pos_y], [press_x, press_y]])
                    end
                    if $button1_pressed_autotable || press_x
                        scroll_lower($autotable_sw, y)
                    end
                    if not press_x.nil?
                        w, pos_x, pos_y = $autotable.window.pointer
                        $autotable.window.draw_lines(gc, [[press_x, press_y], [pos_x, press_y], [pos_x, pos_y], [press_x, pos_y], [press_x, press_y]])
                        update_selected.call
                    end
                end
            end
            true
        }
    }

    $autotable.signal_connect('button-press-event') { |w,e|
        if e.button == 1
            if !$button1_pressed_autotable
                press_x = e.x
                press_y = e.y
                if e.state & Gdk::Window::SHIFT_MASK == 0
                    $selected_elements.each_key { |path| $name2widgets[path][:img].pixbuf = $selected_elements[path][:pixbuf] }
                    $selected_elements = {}
                    $statusbar.push(0, utf8(_("Nothing selected.")))
                else
                    $selected_elements.each_key { |path| $selected_elements[path][:keep] = true }
                end
                set_mousecursor(Gdk::Cursor::TCROSS)
            end
        end
    }
    $autotable.signal_connect('button-release-event') { |w,e|
        if e.button == 1
            if $button1_pressed_autotable
                #- unselect all only now
                $multiple_dnd = $selected_elements.keys
                $selected_elements.each_key { |path| $name2widgets[path][:img].pixbuf = $selected_elements[path][:pixbuf] }
                $selected_elements = {}
                $button1_pressed_autotable = false
            else
                if pos_x
                    $autotable.window.draw_lines(gc, [[press_x, press_y], [pos_x, press_y], [pos_x, pos_y], [press_x, pos_y], [press_x, press_y]])
                    if $selected_elements.length > 0
                        $statusbar.push(0, utf8(_("%s elements selected.") % $selected_elements.length))
                    end
                end
                press_x = press_y = pos_x = pos_y = nil
                set_mousecursor(Gdk::Cursor::LEFT_PTR)
            end
        end
    }
    $autotable.signal_connect('motion-notify-event') { |w,e|
        if ! press_x.nil?
            if pos_x
                $autotable.window.draw_lines(gc, [[press_x, press_y], [pos_x, press_y], [pos_x, pos_y], [press_x, pos_y], [press_x, press_y]])
            end
            pos_x = e.x
            pos_y = e.y
            $autotable.window.draw_lines(gc, [[press_x, press_y], [pos_x, press_y], [pos_x, pos_y], [press_x, pos_y], [press_x, press_y]])
            update_selected.call
        end
    }

end

def create_subalbums_page

    subalbums_hb = Gtk::HBox.new
    $subalbums_vb = Gtk::VBox.new(false, 5)
    subalbums_hb.pack_start($subalbums_vb, false, false)
    $subalbums_sw = Gtk::ScrolledWindow.new(nil, nil)
    $subalbums_sw.set_policy(Gtk::POLICY_AUTOMATIC, Gtk::POLICY_AUTOMATIC)
    $subalbums_sw.add_with_viewport(subalbums_hb)
end

def save_current_file
    save_changes

    if $filename
        ios = File.open($filename, "w")
        $xmldoc.write(ios, 0)
        ios.close
    end
end

def save_current_file_user
    save_tempfilename = $filename
    $filename = $orig_filename
    save_current_file
    $modified = false
    $generated_outofline = false
    $filename = save_tempfilename

    msg 3, "performing actual deletion of: " + $todelete.join(', ')
    $todelete.each { |f|
        system("rm -f #{f}")
    }
end

def mark_document_as_dirty
    $xmldoc.elements.each('//dir') { |elem|
        elem.delete_attribute('already-generated')
    }
end

#- ret: true => ok  false => cancel
def ask_save_modifications(msg1, msg2, *options)
    ret = true
    options = options.size > 0 ? options[0] : {}
    if $modified
        if options[:disallow_cancel]
            dialog = Gtk::Dialog.new(msg1,
                                     $main_window,
                                     Gtk::Dialog::MODAL | Gtk::Dialog::DESTROY_WITH_PARENT,
                                     [options[:no] || Gtk::Stock::CLOSE, Gtk::Dialog::RESPONSE_NO],
                                     [options[:yes] || Gtk::Stock::SAVE, Gtk::Dialog::RESPONSE_YES])
        else
            dialog = Gtk::Dialog.new(msg1,
                                     $main_window,
                                     Gtk::Dialog::MODAL | Gtk::Dialog::DESTROY_WITH_PARENT,
                                     [options[:cancel] || Gtk::Stock::CANCEL, Gtk::Dialog::RESPONSE_CANCEL],
                                     [options[:no] || Gtk::Stock::CLOSE, Gtk::Dialog::RESPONSE_NO],
                                     [options[:yes] || Gtk::Stock::SAVE, Gtk::Dialog::RESPONSE_YES])
        end
        dialog.default_response = Gtk::Dialog::RESPONSE_YES
        dialog.vbox.add(Gtk::Label.new(msg2))
        dialog.window_position = Gtk::Window::POS_CENTER
        dialog.show_all
        
        dialog.run { |response|
            dialog.destroy
            if response == Gtk::Dialog::RESPONSE_YES
                save_current_file_user
            else
                #- if we have generated an album but won't save modifications, we must remove 
                #- already-generated markers in original file
                if $generated_outofline
                    begin
                        $xmldoc = REXML::Document.new File.new($orig_filename)
                        mark_document_as_dirty
                        ios = File.open($orig_filename, "w")
                        $xmldoc.write(ios, 0)
                        ios.close
                    rescue Exception
                        puts "exception: #{$!}"
                    end
                end
            end
            if response == Gtk::Dialog::RESPONSE_CANCEL
                ret = false
            end
            $todelete = []  #- unconditionally clear the list of images/videos to delete
        }
    end
    return ret
end

def try_quit(*options)
    if ask_save_modifications(utf8(_("Save before quitting?")),
                              utf8(_("Do you want to save your changes before quitting?")),
                              *options)
        Gtk.main_quit
    end
end

def show_popup(parent, msg, *options)
    dialog = Gtk::Dialog.new
    dialog.title = utf8(_("Booh message"))
    lbl = Gtk::Label.new
    lbl.markup = msg
    if options[0] && options[0][:centered]
        lbl.set_justify(Gtk::Justification::CENTER)
    end
    if options[0] && options[0][:selectable]
        lbl.selectable = true
    end
    if options[0] && options[0][:topwidget]
        dialog.vbox.add(options[0][:topwidget])
    end
    dialog.vbox.add(lbl)
    if options[0] && options[0][:okcancel]
        dialog.add_button(Gtk::Stock::CANCEL, Gtk::Dialog::RESPONSE_CANCEL)
    end
    dialog.add_button(Gtk::Stock::OK, Gtk::Dialog::RESPONSE_OK)

    dialog.set_default_size(200, 120)
    if options[0] && options[0][:pos_centered]
        dialog.window_position = Gtk::Window::POS_CENTER
    else
        dialog.window_position = Gtk::Window::POS_MOUSE
    end

    if options[0] && options[0][:linkurl]
        linkbut = Gtk::Button.new('')
        linkbut.child.markup = "<span foreground=\"#00000000FFFF\" underline=\"single\">#{options[0][:linkurl]}</span>"
        linkbut.signal_connect('clicked') { open_url(options[0][:linkurl] + '/index.html' ) }
        linkbut.relief = Gtk::RELIEF_NONE
        linkbut.signal_connect('enter-notify-event') { set_mousecursor(Gdk::Cursor::HAND2, linkbut); false }
        linkbut.signal_connect('leave-notify-event') { set_mousecursor(nil, linkbut); false }
        dialog.vbox.add(Gtk::Alignment.new(0.5, 0.5, 0, 0).add(linkbut))
    end

    dialog.show_all

    if !options[0] || !options[0][:not_transient]
        dialog.transient_for = parent
        dialog.run { |response|
            dialog.destroy
            if options[0] && options[0][:okcancel]
                return response == Gtk::Dialog::RESPONSE_OK
            end
        }
    else
        dialog.signal_connect('response') { dialog.destroy }
    end
end

def backend_wait_message(parent, msg, infopipe_path, mode)
    w = Gtk::Window.new
    w.set_transient_for(parent)
    w.modal = true

    vb = Gtk::VBox.new(false, 5).set_border_width(5)
    vb.pack_start(Gtk::Label.new(msg), false, false)

    vb.pack_start(frame1 = Gtk::Frame.new(utf8(_("Thumbnails"))).add(vb1 = Gtk::VBox.new(false, 5)))
    vb1.pack_start(pb1_1 = Gtk::ProgressBar.new.set_text(utf8(_("Scanning images and videos..."))), false, false)
    if mode != 'one dir scan'
        vb1.pack_start(pb1_2 = Gtk::ProgressBar.new.set_text(utf8(_("not started"))), false, false)
    end
    if mode == 'web-album'
        vb.pack_start(frame2 = Gtk::Frame.new(utf8(_("HTML pages"))).add(vb1 = Gtk::VBox.new(false, 5)))
        vb1.pack_start(pb2 = Gtk::ProgressBar.new.set_text(utf8(_("not started"))), false, false)
    end
    vb.pack_start(Gtk::HSeparator.new, false, false)

    bottom = Gtk::Alignment.new(0.5, 0.5, 0, 0).add(b = Gtk::Button.new(utf8(_("_Abort"))))
    b.image = Gtk::Image.new("#{$FPATH}/images/stock-close-24.png")
    vb.pack_end(bottom, false, false)

    infopipe = File.open(infopipe_path, File::RDONLY | File::NONBLOCK)
    refresh_thread = Thread.new {
        directories_counter = 0
        while line = infopipe.gets
            if line =~ /^directories: (\d+), sizes: (\d+)/
                directories = $1.to_f + 1
                sizes = $2.to_f
            elsif line =~ /^walking: (.+)\|(.+), (\d+) elements$/
                elements = $3.to_f + 1
                if mode == 'web-album'
                    elements += sizes
                end
                element_counter = 0
                gtk_thread_protect { puts "destroyed: " + pb1_1.destroyed?.to_s; pb1_1.fraction = 0 }
                if mode != 'one dir scan'
                    newtext = utf8(full_src_dir_to_rel($1, $2))
                    newtext = '/' if newtext == ''
                    gtk_thread_protect { puts "destroyed: " + pb1_2.destroyed?.to_s; pb1_2.text = newtext }
                    directories_counter += 1
                    gtk_thread_protect { puts "destroyed: " + pb1_2.destroyed?.to_s; pb1_2.fraction = directories_counter / directories }
                end
            elsif line =~ /^processing element$/
                element_counter += 1
                gtk_thread_protect { puts "destroyed: " + pb1_1.destroyed?.to_s; pb1_1.fraction = element_counter / elements }
            elsif line =~ /^processing size$/
                element_counter += 1
                gtk_thread_protect { puts "destroyed: " + pb1_1.destroyed?.to_s; pb1_1.fraction = element_counter / elements }
            elsif line =~ /^finished processing sizes$/
                gtk_thread_protect { puts "destroyed: " + pb1_1.destroyed?.to_s; pb1_1.fraction = 1 }
            elsif line =~ /^creating index.html$/
                gtk_thread_protect { puts "destroyed: " + pb1_2.destroyed?.to_s; pb1_2.text = utf8(_("finished")) }
                gtk_thread_protect { puts "destroyed: " + pb1_1.destroyed?.to_s; pb1_1.fraction = pb1_2.fraction = 1 }
                directories_counter = 0
            elsif line =~ /^index.html: (.+)\|(.+)/
                newtext = utf8(full_src_dir_to_rel($1, $2))
                newtext = '/' if newtext == ''
                gtk_thread_protect { puts "destroyed: " + pb2.destroyed?.to_s; pb2.text = newtext }
                directories_counter += 1
                gtk_thread_protect { puts "destroyed: " + pb2.destroyed?.to_s; pb2.fraction = directories_counter / directories }
            end
        end
    }

    w.add(vb)
    w.signal_connect('delete-event') { w.destroy }
    w.signal_connect('destroy') {
        Thread.kill(refresh_thread)
        gtk_thread_abandon  #- needed because we're about to destroy widgets in w, for which they may be some pending gtk calls
        if infopipe_path
            infopipe.close
            system("rm -f #{infopipe_path}")
        end
    }
    w.window_position = Gtk::Window::POS_CENTER
    w.show_all

    return [ b, w ]
end

def call_backend(cmd, waitmsg, mode, params)
    pipe = Tempfile.new("boohpipe")
    pipe.close!
    system("mkfifo #{pipe.path}")
    cmd += " --info-pipe #{pipe.path}"
    button, w8 = backend_wait_message($main_window, waitmsg, pipe.path, mode)
    pid = nil
    Thread.new {
        msg 2, cmd
        if pid = fork
            id, exitstatus = Process.waitpid2(pid)
            gtk_thread_protect { puts "destroyed: " + w8.destroyed?.to_s; w8.destroy }
            if exitstatus == 0
                if params[:successmsg]
                    gtk_thread_protect { show_popup($main_window, params[:successmsg], { :linkurl => params[:successmsg_linkurl] }) }
                end
                if params[:closure_after]
                    gtk_thread_protect(&params[:closure_after])
                end
            elsif exitstatus == 15
                #- say nothing, user aborted
            else
                if params[:failuremsg]
                    gtk_thread_protect { show_popup($main_window, params[:failuremsg]) }
                end
            end
        else
            exec(cmd)
        end
    }
    button.signal_connect('clicked') {
        Process.kill('SIGTERM', pid)
    }
end

def save_changes(*forced)
    if forced.empty? && (!$current_path || !$undo_tb.sensitive?)
        return
    end

    $xmldir.delete_attribute('already-generated')

    propagate_children = Proc.new { |xmldir|
        if xmldir.attributes['subdirs-caption']
            xmldir.delete_attribute('already-generated')
        end
        xmldir.elements.each('dir') { |element|
            propagate_children.call(element)
        }
    }

    if $xmldir.child_byname_notattr('dir', 'deleted')
        new_title = $subalbums_title.buffer.text
        if new_title != $xmldir.attributes['subdirs-caption']
            parent = $xmldir.parent
            if parent.name == 'dir'
                parent.delete_attribute('already-generated')
            end
            propagate_children.call($xmldir)
        end
        $xmldir.add_attribute('subdirs-caption', new_title)
        $xmldir.elements.each('dir') { |element|
            if !element.attributes['deleted']
                path = element.attributes['path']
                newtext = $subalbums_edits[path][:editzone].buffer.text
                if element.attributes['subdirs-caption']
                    if element.attributes['subdirs-caption'] != newtext
                        propagate_children.call(element)
                    end
                    element.add_attribute('subdirs-caption',     newtext)
                    element.add_attribute('subdirs-captionfile', utf8($subalbums_edits[path][:captionfile]))
                else
                    if element.attributes['thumbnails-caption'] != newtext
                        element.delete_attribute('already-generated')
                    end
                    element.add_attribute('thumbnails-caption',     newtext)
                    element.add_attribute('thumbnails-captionfile', utf8($subalbums_edits[path][:captionfile]))
                end
            end
        }
    end

    if $notebook.page == 0 && $xmldir.child_byname_notattr('dir', 'deleted')
        if $xmldir.attributes['thumbnails-caption']
            path = $xmldir.attributes['path']
            $xmldir.add_attribute('thumbnails-caption', $subalbums_edits[path][:editzone].buffer.text)
        end
    elsif $xmldir.attributes['thumbnails-caption']
        $xmldir.add_attribute('thumbnails-caption', $thumbnails_title.buffer.text)
    end

    #- remove and reinsert elements to reflect new ordering
    saves = {}
    cpt = 0
    $xmldir.elements.each { |element|
        if element.name == 'image' || element.name == 'video'
            saves[element.attributes['filename']] = element.remove
            cpt += 1
        end
    }
    $autotable.current_order.each { |path|
        chld = $xmldir.add_element(saves[path].name, saves[path].attributes)
        chld.add_attribute('caption', $name2widgets[File.basename(path)][:textview].buffer.text)
        saves.delete(path)
    }
    saves.each_key { |path|
        chld = $xmldir.add_element(saves[path].name, saves[path].attributes)
        chld.add_attribute('deleted', 'true')
    }
end

def remove_all_captions
    $modified = true
    texts = {}
    $autotable.current_order.each { |path|
        texts[File.basename(path) ] = $name2widgets[File.basename(path)][:textview].buffer.text
        $name2widgets[File.basename(path)][:textview].buffer.text = ''
    }
    save_undo(_("remove all captions"),
              Proc.new { |texts|
                  texts.each_key { |key|
                      $name2widgets[key][:textview].buffer.text = texts[key]
                  }
                  $notebook.set_page(1)
                  Proc.new {
                      texts.each_key { |key|
                          $name2widgets[key][:textview].buffer.text = ''
                      }
                      $notebook.set_page(1)
                  }
              }, texts)
end

def change_dir
    $selected_elements.each_key { |path|
        $name2widgets[path][:img].pixbuf = $selected_elements[path][:pixbuf]
    }
    $autotable.clear
    $vbox2widgets = {}
    $name2widgets = {}
    $name2closures = {}
    $selected_elements = {}
    $cuts = []
    $multiple_dnd = []
    UndoHandler.cleanup
    $undo_tb.sensitive = $undo_mb.sensitive = false
    $redo_tb.sensitive = $redo_mb.sensitive = false

    if !$current_path
        return
    end

    $subalbums_vb.children.each { |chld|
        $subalbums_vb.remove(chld)
    }
    $subalbums = Gtk::Table.new(0, 0, true)
    current_y_sub_albums = 0

    $xmldir = $xmldoc.elements["//dir[@path='#{$current_path}']"]
    $subalbums_edits = {}
    subalbums_counter = 0
    subalbums_edits_bypos = {}

    add_subalbum = Proc.new { |xmldir, counter|
        $subalbums_edits[xmldir.attributes['path']] = { :position => counter }
        subalbums_edits_bypos[counter] = $subalbums_edits[xmldir.attributes['path']]
        if xmldir == $xmldir
            thumbnail_file = "#{current_dest_dir}/thumbnails-thumbnail.jpg"
            caption = xmldir.attributes['thumbnails-caption']
            captionfile, dummy = find_subalbum_caption_info(xmldir)
            infotype = 'thumbnails'
        else
            thumbnail_file = "#{current_dest_dir}/thumbnails-#{make_dest_filename(from_utf8(File.basename(xmldir.attributes['path'])))}.jpg"
            captionfile, caption = find_subalbum_caption_info(xmldir)
            infotype = find_subalbum_info_type(xmldir)
        end
        msg 3, "add subdir: #{xmldir.attributes['path']} with file: #{thumbnail_file}"
        hbox = Gtk::HBox.new
        hbox.pack_start(Gtk::Alignment.new(1, 0.5, 0, 0).add(Gtk::Label.new.set_markup('<i>' + File.basename(xmldir.attributes['path']) + ':</i>')))
        f = Gtk::Frame.new
        f.set_shadow_type(Gtk::SHADOW_ETCHED_OUT)

        img = nil
        my_gen_real_thumbnail = proc {
            gen_real_thumbnail('subdir', captionfile, thumbnail_file, xmldir, $albums_thumbnail_size, img, infotype)
        }

        if !$modified_pixbufs[thumbnail_file] && !File.exists?(thumbnail_file)
            f.add(img = Gtk::Image.new)
            my_gen_real_thumbnail.call
        else
            f.add(img = Gtk::Image.new($modified_pixbufs[thumbnail_file] ? $modified_pixbufs[thumbnail_file][:pixbuf] : thumbnail_file))
        end
        hbox.pack_end(Gtk::Alignment.new(0.5, 0.5, 0, 0).add(evtbox = Gtk::EventBox.new.add(f)), false, false)
        $subalbums.attach(hbox,
                          0, 1, current_y_sub_albums, current_y_sub_albums + 1, Gtk::FILL, Gtk::FILL, 2, 2)

        frame, textview = create_editzone($subalbums_sw, 0, img)
        textview.buffer.text = caption
        $subalbums.attach(Gtk::Alignment.new(0, 0.5, 0.5, 0).add(frame),
                          1, 2, current_y_sub_albums, current_y_sub_albums + 1, Gtk::FILL, Gtk::FILL, 2, 2)

        change_image = Proc.new {
            fc = Gtk::FileChooserDialog.new(utf8(_("Select image for caption")),
                                            nil,
                                            Gtk::FileChooser::ACTION_OPEN,
                                            nil,
                                            [Gtk::Stock::OK, Gtk::Dialog::RESPONSE_ACCEPT], [Gtk::Stock::CANCEL, Gtk::Dialog::RESPONSE_CANCEL])
            fc.set_current_folder(from_utf8(xmldir.attributes['path']))
            fc.transient_for = $main_window
            fc.preview_widget = preview = Gtk::Alignment.new(0.5, 0.5, 0, 0).add(f = Gtk::Frame.new.set_shadow_type(Gtk::SHADOW_ETCHED_OUT))
            f.add(preview_img = Gtk::Image.new)
            preview.show_all
            fc.signal_connect('update-preview') { |w|
                begin
                    if fc.preview_filename
                        preview_img.pixbuf = rotate_pixbuf(Gdk::Pixbuf.new(fc.preview_filename, 240, 180), guess_rotate(fc.preview_filename))
                        fc.preview_widget_active = true
                    end
                rescue Gdk::PixbufError
                    fc.preview_widget_active = false
                end
            }
            if fc.run == Gtk::Dialog::RESPONSE_ACCEPT
                $modified = true
                old_file = captionfile
                old_rotate = xmldir.attributes["#{infotype}-rotate"]
                old_color_swap = xmldir.attributes["#{infotype}-color-swap"]
                old_enhance = xmldir.attributes["#{infotype}-enhance"]
                old_frame_offset = xmldir.attributes["#{infotype}-frame-offset"]

                new_file = fc.filename
                msg 3, "new captionfile is: #{fc.filename}"
                perform_changefile = Proc.new {
                    $subalbums_edits[xmldir.attributes['path']][:captionfile] = captionfile = new_file
                    $modified_pixbufs.delete(thumbnail_file)
                    xmldir.delete_attribute("#{infotype}-rotate")
                    xmldir.delete_attribute("#{infotype}-color-swap")
                    xmldir.delete_attribute("#{infotype}-enhance")
                    xmldir.delete_attribute("#{infotype}-frame-offset")
                    my_gen_real_thumbnail.call
                }
                perform_changefile.call

                save_undo(_("change caption file for sub-album"),
                          Proc.new {
                              $subalbums_edits[xmldir.attributes['path']][:captionfile] = captionfile = old_file
                              xmldir.add_attribute("#{infotype}-rotate", old_rotate)
                              xmldir.add_attribute("#{infotype}-color-swap", old_color_swap)
                              xmldir.add_attribute("#{infotype}-enhance", old_enhance)
                              xmldir.add_attribute("#{infotype}-frame-offset", old_frame_offset)
                              my_gen_real_thumbnail.call
                              $notebook.set_page(0)
                              Proc.new {
                                  perform_changefile.call
                                  $notebook.set_page(0)
                              }
                          })
            end
            fc.destroy
        }

        rotate_and_cleanup = Proc.new { |angle|
            rotate(angle, thumbnail_file, img, xmldir, "#{infotype}-", $default_albums_thumbnails[:x], $default_albums_thumbnails[:y])
            system("rm -f '#{thumbnail_file}'")
        }

        move = Proc.new { |direction|
            $modified = true

            save_changes('forced')
            if direction == 'up'
                oldpos = $subalbums_edits[xmldir.attributes['path']][:position]
                $subalbums_edits[xmldir.attributes['path']][:position] -= 1
                subalbums_edits_bypos[oldpos - 1][:position] += 1
            else
                oldpos = $subalbums_edits[xmldir.attributes['path']][:position]
                $subalbums_edits[xmldir.attributes['path']][:position] += 1
                subalbums_edits_bypos[oldpos + 1][:position] -= 1
            end

            elems = []
            $xmldir.elements.each('dir') { |element|
                if (!element.attributes['deleted'])
                    elems << [ element.attributes['path'], element.remove ]
                end
            }
            elems.sort { |a,b| $subalbums_edits[a[0]][:position] <=> $subalbums_edits[b[0]][:position] }.
                  each { |e| $xmldir.add_element(e[1]) }
            #- need to remove the already-generated tag to all subdirs because of "previous/next albums" links completely changed
            $xmldir.elements.each('descendant::dir') { |elem|
                elem.delete_attribute('already-generated')
            }
            change_dir
        }

        color_swap_and_cleanup = Proc.new {
            perform_color_swap_and_cleanup = Proc.new {
                color_swap(xmldir, "#{infotype}-")
                my_gen_real_thumbnail.call
            }
            perform_color_swap_and_cleanup.call

            save_undo(_("color swap"),
                      Proc.new {
                          perform_color_swap_and_cleanup.call
                          $notebook.set_page(0)
                          Proc.new {
                              perform_color_swap_and_cleanup.call
                              $notebook.set_page(0)
                          }
                      })
        }

        change_frame_offset_and_cleanup = Proc.new {
            if values = ask_new_frame_offset(xmldir, "#{infotype}-")
                perform_change_frame_offset_and_cleanup = Proc.new { |val|
                    change_frame_offset(xmldir, "#{infotype}-", val)
                    my_gen_real_thumbnail.call
                }
                perform_change_frame_offset_and_cleanup.call(values[:new])

                save_undo(_("specify frame offset"),
                          Proc.new {
                              perform_change_frame_offset_and_cleanup.call(values[:old])
                              $notebook.set_page(0)
                              Proc.new {
                                  perform_change_frame_offset_and_cleanup.call(values[:new])
                                  $notebook.set_page(0)
                              }
                          })
            end
        }

        whitebalance_and_cleanup = Proc.new {
            if values = ask_whitebalance(captionfile, thumbnail_file, img, xmldir, "#{infotype}-",
                                         $default_albums_thumbnails[:x], $default_albums_thumbnails[:y], infotype)
                perform_change_whitebalance_and_cleanup = Proc.new { |val|
                    change_whitebalance(xmldir, "#{infotype}-", val)
                    recalc_whitebalance(val, captionfile, thumbnail_file, img, xmldir, "#{infotype}-",
                                        $default_albums_thumbnails[:x], $default_albums_thumbnails[:y], infotype)
                    system("rm -f '#{thumbnail_file}'")
                }
                perform_change_whitebalance_and_cleanup.call(values[:new])
                
                save_undo(_("fix white balance"),
                          Proc.new {
                              perform_change_whitebalance_and_cleanup.call(values[:old])
                              $notebook.set_page(0)
                              Proc.new {
                                  perform_change_whitebalance_and_cleanup.call(values[:new])
                                  $notebook.set_page(0)
                              }
                          })
            end
        }

        enhance_and_cleanup = Proc.new {
            perform_enhance_and_cleanup = Proc.new {
                enhance(xmldir, "#{infotype}-")
                my_gen_real_thumbnail.call
            }
            
            perform_enhance_and_cleanup.call
            
            save_undo(_("enhance"),
                      Proc.new {
                          perform_enhance_and_cleanup.call
                          $notebook.set_page(0)
                          Proc.new {
                              perform_enhance_and_cleanup.call
                              $notebook.set_page(0)
                          }
                      })
        }

        evtbox.signal_connect('button-press-event') { |w, event|
            if event.event_type == Gdk::Event::BUTTON_PRESS && event.button == 1
                if $r90.active?
                    rotate_and_cleanup.call(90)
                elsif $r270.active?
                    rotate_and_cleanup.call(-90)
                elsif $enhance.active?
                    enhance_and_cleanup.call
                end
            end
            if event.event_type == Gdk::Event::BUTTON_PRESS && event.button == 3
                popup_thumbnail_menu(event, ['change_image'], entry2type(captionfile), xmldir, "#{infotype}-",
                                     { :forbid_left => true, :forbid_right => true,
                                       :can_up => counter > 1, :can_down => counter > 0 && counter < subalbums_counter },
                                     { :change => change_image, :move => move, :rotate => rotate_and_cleanup, :enhance => enhance_and_cleanup,
                                       :color_swap => color_swap_and_cleanup, :frame_offset => change_frame_offset_and_cleanup, :whitebalance => whitebalance_and_cleanup })
            end
            if event.event_type == Gdk::Event::BUTTON2_PRESS && event.button == 1
                change_image.call
                true   #- handled
            end
        }
        evtbox.signal_connect('button-press-event') { |w, event|
            $gesture_press = { :filename => thumbnail_file, :x => event.x, :y => event.y }
            false
        }

        evtbox.signal_connect('button-release-event') { |w, event|
            if !$r90.active? && !$r270.active? && $gesture_press && $gesture_press[:filename] == thumbnail_file
                msg 3, "press: #{$gesture_press[:x]} release: #{event.x}"
                if (($gesture_press[:x]-event.x)/($gesture_press[:y]-event.y)).abs > 2 && ($gesture_press[:x]-event.x).abs > 5
                    angle = event.x-$gesture_press[:x] > 0 ? 90 : -90
                    msg 3, "gesture rotate: #{angle}"
                    rotate_and_cleanup.call(angle)
                end
            end
            $gesture_press = nil
        }
                
        $subalbums_edits[xmldir.attributes['path']][:editzone] = textview
        $subalbums_edits[xmldir.attributes['path']][:captionfile] = captionfile
        current_y_sub_albums += 1
    }

    if $xmldir.child_byname_notattr('dir', 'deleted')
        #- title edition
        frame, $subalbums_title = create_editzone($subalbums_sw, 0, nil)
        $subalbums_title.buffer.text = $xmldir.attributes['subdirs-caption']
        $subalbums_title.set_justification(Gtk::Justification::CENTER)
        $subalbums_vb.pack_start(Gtk::Alignment.new(0.5, 0.5, 0.5, 0).add(frame), false, false)
        #- this album image/caption
        if $xmldir.attributes['thumbnails-caption']
            add_subalbum.call($xmldir, 0)
        end
    end
    total = { 'image' => 0, 'video' => 0, 'dir' => 0 }
    $xmldir.elements.each { |element|
        if (element.name == 'image' || element.name == 'video') && !element.attributes['deleted']
            #- element (image or video) of this album
            dest_img = build_full_dest_filename(element.attributes['filename']).sub(/\.[^\.]+$/, '') + "-#{$default_size['thumbnails']}.jpg"
            msg 3, "dest_img: #{dest_img}"
            add_thumbnail($autotable, element.attributes['filename'], element.name, dest_img, from_utf8(element.attributes['caption']))
            total[element.name] += 1
        end
        if element.name == 'dir' && !element.attributes['deleted']
            #- sub-album image/caption
            add_subalbum.call(element, subalbums_counter += 1)
            total[element.name] += 1
        end
    }
    $statusbar.push(0, utf8(_("%s: %s images and %s videos, %s sub-albums") % [ File.basename(from_utf8($xmldir.attributes['path'])),
                                                                                total['image'], total['video'], total['dir'] ]))
    $subalbums_vb.add($subalbums)
    $subalbums_vb.show_all

    if !$xmldir.child_byname_notattr('image', 'deleted') && !$xmldir.child_byname_notattr('video', 'deleted')
        $notebook.get_tab_label($autotable_sw).sensitive = false
        $notebook.set_page(0)
        $thumbnails_title.buffer.text = ''
    else
        $notebook.get_tab_label($autotable_sw).sensitive = true
        $thumbnails_title.buffer.text = $xmldir.attributes['thumbnails-caption']
    end

    if !$xmldir.child_byname_notattr('dir', 'deleted')
        $notebook.get_tab_label($subalbums_sw).sensitive = false
        $notebook.set_page(1)
    else
        $notebook.get_tab_label($subalbums_sw).sensitive = true
    end
end

def pixbuf_or_nil(filename)
    begin
        return Gdk::Pixbuf.new(filename)
    rescue
        return nil
    end
end

def theme_choose(current)
    dialog = Gtk::Dialog.new(utf8(_("Select your preferred theme")),
                             $main_window,
                             Gtk::Dialog::MODAL | Gtk::Dialog::DESTROY_WITH_PARENT,
                             [Gtk::Stock::OK, Gtk::Dialog::RESPONSE_OK],
                             [Gtk::Stock::CANCEL, Gtk::Dialog::RESPONSE_CANCEL])

    model = Gtk::ListStore.new(String, Gdk::Pixbuf, Gdk::Pixbuf, Gdk::Pixbuf)
    treeview = Gtk::TreeView.new(model).set_rules_hint(true)
    treeview.append_column(Gtk::TreeViewColumn.new(utf8(_("Theme name")), Gtk::CellRendererText.new, { :text => 0 }).set_alignment(0.5).set_spacing(5))
    treeview.append_column(Gtk::TreeViewColumn.new(utf8(_("Sub-albums page look")), Gtk::CellRendererPixbuf.new, { :pixbuf => 1 }).set_alignment(0.5).set_spacing(5))
    treeview.append_column(Gtk::TreeViewColumn.new(utf8(_("Thumbnails page look")), Gtk::CellRendererPixbuf.new, { :pixbuf => 2 }).set_alignment(0.5).set_spacing(5))
    treeview.append_column(Gtk::TreeViewColumn.new(utf8(_("Fullscreen page look")), Gtk::CellRendererPixbuf.new, { :pixbuf => 3 }).set_alignment(0.5).set_spacing(5))
    treeview.append_column(Gtk::TreeViewColumn.new('', Gtk::CellRendererText.new, {}))
    treeview.signal_connect('button-press-event') { |w, event|
        if event.event_type == Gdk::Event::BUTTON2_PRESS && event.button == 1
            dialog.response(Gtk::Dialog::RESPONSE_OK)
        end
    }

    dialog.vbox.add(sw = Gtk::ScrolledWindow.new(nil, nil).add(treeview).set_policy(Gtk::POLICY_AUTOMATIC, Gtk::POLICY_AUTOMATIC))

    `find '#{$FPATH}/themes' -mindepth 1 -maxdepth 1 -type d`.each { |dir|
        dir.chomp!
        iter = model.append
        iter[0] = File.basename(dir)
        iter[1] = pixbuf_or_nil("#{dir}/metadata/screenshot-1.png")
        iter[2] = pixbuf_or_nil("#{dir}/metadata/screenshot-2.png")
        iter[3] = pixbuf_or_nil("#{dir}/metadata/screenshot-3.png")
        if File.basename(dir) == current
            treeview.selection.select_iter(iter)
        end
    }

    dialog.set_default_size(700, 400)
    dialog.vbox.show_all
    dialog.run { |response|
        iter = treeview.selection.selected
        dialog.destroy
        if response == Gtk::Dialog::RESPONSE_OK && iter
            return model.get_value(iter, 0)
        end
    }
    return nil
end

def show_password_protections
    examine_dir_elem = Proc.new { |parent_iter, xmldir, already_protected|
        child_iter = $albums_iters[xmldir.attributes['path']]
        if xmldir.attributes['password-protect']
            child_iter[2] = pixbuf_or_nil("#{$FPATH}/images/galeon-secure.png")
            already_protected = true
        elsif already_protected
            pix = pixbuf_or_nil("#{$FPATH}/images/galeon-secure-shadow.png")
            if pix
                pix = pix.saturate_and_pixelate(1, true)
            end
            child_iter[2] = pix
        else
            child_iter[2] = nil
        end
        xmldir.elements.each('dir') { |elem|
            if !elem.attributes['deleted']
                examine_dir_elem.call(child_iter, elem, already_protected)
            end
        }
    }
    examine_dir_elem.call(nil, $xmldoc.elements['//dir'], false)
end

def populate_subalbums_treeview
    $albums_ts.clear
    $autotable.clear
    $albums_iters = {}
    $subalbums_vb.children.each { |chld|
        $subalbums_vb.remove(chld)
    }

    source = $xmldoc.root.attributes['source']
    msg 3, "source: #{source}"

    xmldir = $xmldoc.elements['//dir']
    if !xmldir || xmldir.attributes['path'] != source
        msg 1, _("Corrupted booh file...")
        return
    end

    append_dir_elem = Proc.new { |parent_iter, xmldir|
        child_iter = $albums_ts.append(parent_iter)
        child_iter[0] = File.basename(xmldir.attributes['path'])
        child_iter[1] = xmldir.attributes['path']
        $albums_iters[xmldir.attributes['path']] = child_iter
        msg 3, "puttin location: #{xmldir.attributes['path']}"
        xmldir.elements.each('dir') { |elem|
            if !elem.attributes['deleted']
                append_dir_elem.call(child_iter, elem)
            end
        }
    }
    append_dir_elem.call(nil, xmldir)
    show_password_protections

    $albums_tv.expand_all
    $albums_tv.selection.select_iter($albums_ts.iter_first)
end

def open_file(filename)

    $filename = nil
    $modified = false
    $current_path = nil   #- invalidate
    $modified_pixbufs = {}
    $albums_ts.clear
    $autotable.clear
    $subalbums_vb.children.each { |chld|
        $subalbums_vb.remove(chld)
    }

    if !File.exists?(filename)
        return utf8(_("File not found."))
    end

    begin
        $xmldoc = REXML::Document.new File.new(filename)
    rescue Exception
        $xmldoc = nil
    end

    if !$xmldoc || !$xmldoc.root || $xmldoc.root.name != 'booh'
        if entry2type(filename).nil?
            return utf8(_("Not a booh file!"))
        else
            return utf8(_("Not a booh file!\n\nHint: you cannot import directly an image or video with File/Open.\nUse File/New to create a new album."))
        end
    end

    if !source = $xmldoc.root.attributes['source']
        return utf8(_("Corrupted booh file..."))
    end

    if !dest = $xmldoc.root.attributes['destination']
        return utf8(_("Corrupted booh file..."))
    end

    if !theme = $xmldoc.root.attributes['theme']
        return utf8(_("Corrupted booh file..."))
    end

    if $xmldoc.root.attributes['version'] != $VERSION
        msg 2, _("File's version %s, booh version now %s, marking dirty") % [ $xmldoc.root.attributes['version'], $VERSION ]
        mark_document_as_dirty
        $xmldoc.root.add_attribute('version', $VERSION)
    end

    limit_sizes = $xmldoc.root.attributes['limit-sizes']
    optimizefor32 = !$xmldoc.root.attributes['optimize-for-32'].nil?
    nperrow = $xmldoc.root.attributes['thumbnails-per-row']

    $filename = filename
    select_theme(theme, limit_sizes, optimizefor32, nperrow)
    $default_size['thumbnails'] =~ /(.*)x(.*)/
    $default_thumbnails = { :x => $1.to_i, :y => $2.to_i }
    $albums_thumbnail_size =~ /(.*)x(.*)/
    $default_albums_thumbnails = { :x => $1.to_i, :y => $2.to_i }

    populate_subalbums_treeview

    $save.sensitive = $save_as.sensitive = $merge_current.sensitive = $merge_newsubs.sensitive = $merge.sensitive = $generate.sensitive = $view_wa.sensitive = $properties.sensitive = $remove_all_captions.sensitive = true
    return nil
end

def open_file_user(filename)
    result = open_file(filename)
    if !result
        $config['last-opens'] ||= []
        if $config['last-opens'][-1] != utf8(filename)
            $config['last-opens'] << utf8(filename)
        end
        $orig_filename = $filename
        tmp = Tempfile.new("boohtemp")
        tmp.close!
        #- for security
        ios = File.open($filename = tmp.path, File::RDWR|File::CREAT|File::EXCL)
        ios.close
        $tempfiles << $filename << "#{$filename}.backup"
    else
        $orig_filename = nil
    end
    return result
end

def open_file_popup
    if !ask_save_modifications(utf8(_("Save this album?")),
                               utf8(_("Do you want to save the changes to this album?")),
                               { :yes => Gtk::Stock::YES, :no => Gtk::Stock::NO })
        return
    end
    fc = Gtk::FileChooserDialog.new(utf8(_("Open file")),
                                    nil,
                                    Gtk::FileChooser::ACTION_OPEN,
                                    nil,
                                    [Gtk::Stock::OPEN, Gtk::Dialog::RESPONSE_ACCEPT], [Gtk::Stock::CANCEL, Gtk::Dialog::RESPONSE_CANCEL])
    fc.add_shortcut_folder(File.expand_path("~/.booh"))
    fc.set_current_folder(File.expand_path("~/.booh"))
    fc.transient_for = $main_window
    ok = false
    while !ok
        if fc.run == Gtk::Dialog::RESPONSE_ACCEPT
            push_mousecursor_wait(fc)
            msg = open_file_user(fc.filename)
            pop_mousecursor(fc)
            if msg
                show_popup(fc, msg)
                ok = false
            else
                ok = true
            end
        else
            ok = true
        end
    end
    fc.destroy
end

def open_url(url)
    cmd = $config['browser'].gsub('%f', "'#{url}'") + ' &'
    msg 2, cmd
    system(cmd)
end

def additional_booh_options
    options = ''
    if $config['mproc']
        options += "--mproc #{$config['mproc'].to_i} "
    end
    if $config['emptycomments']
        options += "--empty-comments "
    end
    return options
end

def new_album
    if !ask_save_modifications(utf8(_("Save this album?")),
                               utf8(_("Do you want to save the changes to this album?")),
                               { :yes => Gtk::Stock::YES, :no => Gtk::Stock::NO })
        return
    end
    dialog = Gtk::Dialog.new(utf8(_("Create a new album")),
                             $main_window,
                             Gtk::Dialog::MODAL | Gtk::Dialog::DESTROY_WITH_PARENT,
                             [Gtk::Stock::OK, Gtk::Dialog::RESPONSE_OK],
                             [Gtk::Stock::CANCEL, Gtk::Dialog::RESPONSE_CANCEL])
    
    frame1 = Gtk::Frame.new(utf8(_("Locations"))).add(tbl = Gtk::Table.new(0, 0, false))
    tbl.attach(Gtk::Label.new(utf8(_("Directory of images/videos: "))),
               0, 1, 0, 1, Gtk::SHRINK, Gtk::SHRINK, 2, 2)
    tbl.attach(src = Gtk::Entry.new,
               1, 2, 0, 1, Gtk::FILL, Gtk::SHRINK, 2, 2)
    tbl.attach(src_browse = Gtk::Button.new(utf8(_("browse..."))),
               2, 3, 0, 1, Gtk::SHRINK, Gtk::SHRINK, 2, 2)
    tbl.attach(Gtk::Label.new.set_markup(utf8(_("<span size='small'><i>number of images/videos down this directory:</i></span> "))),
               0, 1, 1, 2, Gtk::SHRINK, Gtk::SHRINK, 2, 2)
    tbl.attach(src_nb = Gtk::Label.new.set_markup(utf8(_("<span size='small'><i>N/A</i></span>"))),
               1, 2, 1, 2, Gtk::FILL, Gtk::SHRINK, 2, 2)
    tbl.attach(Gtk::Label.new(utf8(_("Directory where to put the web-album: "))),
               0, 1, 2, 3, Gtk::SHRINK, Gtk::SHRINK, 2, 2)
    tbl.attach(dest = Gtk::Entry.new,
               1, 2, 2, 3, Gtk::FILL, Gtk::SHRINK, 2, 2)
    tbl.attach(dest_browse = Gtk::Button.new(utf8(_("browse..."))),
               2, 3, 2, 3, Gtk::SHRINK, Gtk::SHRINK, 2, 2)
    tbl.attach(Gtk::Label.new(utf8(_("Filename to store this album's properties: "))),
               0, 1, 3, 4, Gtk::SHRINK, Gtk::SHRINK, 2, 2)
    tbl.attach(conf = Gtk::Entry.new.set_size_request(250, -1),
               1, 2, 3, 4, Gtk::FILL, Gtk::SHRINK, 2, 2)
    tbl.attach(conf_browse = Gtk::Button.new(utf8(_("browse..."))),
               2, 3, 3, 4, Gtk::SHRINK, Gtk::SHRINK, 2, 2)

    tooltips = Gtk::Tooltips.new
    frame2 = Gtk::Frame.new(utf8(_("Configuration"))).add(vb = Gtk::VBox.new)
    vb.add(Gtk::HBox.new(false, 3).pack_start(Gtk::Label.new(utf8(_("Theme: "))), false, false, 0).
                         pack_start(theme_button = Gtk::Button.new($config['default-theme'] || 'simple'), false, false, 0))
    vb.add(Gtk::HBox.new(false, 3).pack_start(Gtk::Label.new(utf8(_("Sizes of images to generate: "))), false, false, 0).
                                   pack_start(sizes = Gtk::HBox.new, false, false, 0))
    vb.add(optimize432 = Gtk::CheckButton.new(utf8(_("Optimize for 3/2 aspect ratio"))))
    tooltips.set_tip(optimize432, utf8(_("Resize images with optimized sizes for 3/2 aspect ratio rather than 4/3 (typical aspect ratio of pictures from non digital cameras are 3/2 when pictures from digital cameras are 4/3)")), nil)
    vb.add(Gtk::HBox.new(false, 3).pack_start(Gtk::Label.new(utf8(_("Number of thumbnails per row: "))), false, false, 0).
                                   pack_start(nperrowradios = Gtk::HBox.new, false, false, 0))

    src_nb_calculated_for = ''
    src_nb_thread = nil
    process_src_nb = Proc.new {
        if src.text != src_nb_calculated_for
            src_nb_calculated_for = src.text
            if src_nb_thread
                Thread.kill(src_nb_thread)
                src_nb_thread = nil
            end
            if File.directory?(from_utf8(src_nb_calculated_for)) && src_nb_calculated_for != '/'
                if File.readable?(from_utf8(src_nb_calculated_for))
                    src_nb_thread = Thread.new {
                        gtk_thread_protect { puts "destroyed: " + src_nb.destroyed?.to_s; src_nb.set_markup(utf8(_("<span size='small'><i>processing...</i></span>"))) }
                        total = { 'image' => 0, 'video' => 0, nil => 0 }
                        `find '#{from_utf8(src_nb_calculated_for)}' -type d -follow`.each { |dir|
                            if File.basename(dir) =~ /^\./
                                next
                            else
                                begin
                                    Dir.entries(dir.chomp).each { |file|
                                        total[entry2type(file)] += 1
                                    }
                                rescue Errno::EACCES, Errno::ENOENT
                                end
                            end
                        }
                        gtk_thread_protect { puts "destroyed: " + src_nb.destroyed?.to_s; src_nb.set_markup(utf8(_("<span size='small'><i>%s images and %s videos</i></span>") % [ total['image'], total['video'] ])) }
                        src_nb_thread = nil
                    }
                else
                    src_nb.set_markup(utf8(_("<span size='small'><i>permission denied</i></span>")))
                end
            else
                src_nb.set_markup(utf8(_("<span size='small'><i>N/A</i></span>")))
            end
        end
        true
    }
    timeout_src_nb = Gtk.timeout_add(100) {
        process_src_nb.call
    }

    src_browse.signal_connect('clicked') {
        fc = Gtk::FileChooserDialog.new(utf8(_("Select the directory of images/videos")),
                                        nil,
                                        Gtk::FileChooser::ACTION_SELECT_FOLDER,
                                        nil,
                                        [Gtk::Stock::OPEN, Gtk::Dialog::RESPONSE_ACCEPT], [Gtk::Stock::CANCEL, Gtk::Dialog::RESPONSE_CANCEL])
        fc.transient_for = $main_window
        if fc.run == Gtk::Dialog::RESPONSE_ACCEPT
            src.text = utf8(fc.filename)
            process_src_nb.call
            conf.text = File.expand_path("~/.booh/#{File.basename(src.text)}")
        end
        fc.destroy
    }

    dest_browse.signal_connect('clicked') {
        fc = Gtk::FileChooserDialog.new(utf8(_("Select a new directory where to put the web-album")),
                                        nil,
                                        Gtk::FileChooser::ACTION_CREATE_FOLDER,
                                        nil,
                                        [Gtk::Stock::OPEN, Gtk::Dialog::RESPONSE_ACCEPT], [Gtk::Stock::CANCEL, Gtk::Dialog::RESPONSE_CANCEL])
        fc.transient_for = $main_window
        if fc.run == Gtk::Dialog::RESPONSE_ACCEPT
            dest.text = utf8(fc.filename)
        end
        fc.destroy
    }

    conf_browse.signal_connect('clicked') {
        fc = Gtk::FileChooserDialog.new(utf8(_("Select a new file to store this album's properties")),
                                        nil,
                                        Gtk::FileChooser::ACTION_SAVE,
                                        nil,
                                        [Gtk::Stock::SAVE, Gtk::Dialog::RESPONSE_ACCEPT], [Gtk::Stock::CANCEL, Gtk::Dialog::RESPONSE_CANCEL])
        fc.transient_for = $main_window
        fc.add_shortcut_folder(File.expand_path("~/.booh"))
        fc.set_current_folder(File.expand_path("~/.booh"))
        if fc.run == Gtk::Dialog::RESPONSE_ACCEPT
            conf.text = utf8(fc.filename)
        end
        fc.destroy
    }

    theme_sizes = []
    nperrows = []
    recreate_theme_config = proc {
        theme_sizes.each { |e| sizes.remove(e[:widget]) }
        theme_sizes = []
        select_theme(theme_button.label, 'all', optimize432.active?, nil)
        $images_size.each { |s|
            sizes.add(cb = Gtk::CheckButton.new(sizename(s['name'])))
            if !s['optional']
                cb.active = true
            end
            tooltips.set_tip(cb, utf8(s['description']), nil)
            theme_sizes << { :widget => cb, :value => s['name'] }
        }
        sizes.add(cb = Gtk::CheckButton.new(utf8(_('original'))))
        tooltips = Gtk::Tooltips.new
        tooltips.set_tip(cb, utf8(_("Include original image in web-album")), nil)
        theme_sizes << { :widget => cb, :value => 'original' }
        sizes.show_all

        nperrows.each { |e| nperrowradios.remove(e[:widget]) }
        nperrow_group = nil
        nperrows = []
        $allowed_N_values.each { |n|
            if nperrow_group
                nperrowradios.add(rb = Gtk::RadioButton.new(nperrow_group, n.to_s, false))
            else
                nperrowradios.add(nperrow_group = rb = Gtk::RadioButton.new(n.to_s))
            end
            if $default_N == n
                rb.active = true
            end
            nperrows << { :widget => rb, :value => n }
        }
        nperrowradios.show_all
    }
    recreate_theme_config.call

    theme_button.signal_connect('clicked') {
        if newtheme = theme_choose(theme_button.label)
            theme_button.label = newtheme
            recreate_theme_config.call
        end
    }

    dialog.vbox.add(frame1)
    dialog.vbox.add(frame2)
    dialog.window_position = Gtk::Window::POS_MOUSE
    dialog.show_all

    keepon = true
    ok = true
    while keepon
        dialog.run { |response|
            if response == Gtk::Dialog::RESPONSE_OK
                srcdir = from_utf8(src.text)
                destdir = from_utf8(dest.text)
                if !File.directory?(srcdir)
                    show_popup(dialog, utf8(_("The directory of images/videos doesn't exist. Please check your input.")))
                    src.grab_focus
                elsif conf.text == ''
                    show_popup(dialog, utf8(_("Please specify a filename to store the album's properties.")))
                    conf.grab_focus
                elsif File.directory?(from_utf8(conf.text))
                    show_popup(dialog, utf8(_("Sorry, the filename specified to store the album's properties is an existing directory. Please choose another one.")))
                    conf.grab_focus
                elsif destdir != make_dest_filename(destdir)
                    show_popup(dialog, utf8(_("Sorry, destination directory can't contain non simple alphanumeric characters.")))
                    dest.grab_focus
                elsif File.directory?(destdir) && Dir.entries(destdir).size > 2
                    keepon = !show_popup(dialog, utf8(_("The destination directory already exists. Are you sure you want to continue?")), { :okcancel => true })
                    dest.grab_focus
                elsif File.exists?(destdir) && !File.directory?(destdir)
                    show_popup(dialog, utf8(_("There is already a file by the name of the destination directory. Please choose another one.")))
                    dest.grab_focus
                elsif !theme_sizes.detect { |e| e[:value] != 'original' && e[:widget].active? }
                    show_popup(dialog, utf8(_("You need to select at least one size (not counting original).")))
                else
                    system("mkdir '#{destdir}'")
                    if !File.directory?(destdir)
                        show_popup(dialog, utf8(_("Could not create destination directory. Permission denied?")))
                        dest.grab_focus
                    else
                        keepon = false
                    end
                end
            else
                keepon = ok = false
            end
        }
    end
    srcdir = from_utf8(src.text)
    destdir = from_utf8(dest.text)
    configskel = File.expand_path(from_utf8(conf.text))
    theme = theme_button.label
    sizes = theme_sizes.find_all { |e| e[:widget].active? }.collect { |e| e[:value] }.join(',')
    nperrow = nperrows.find { |e| e[:widget].active? }[:value]
    opt432 = optimize432.active?
    if src_nb_thread
        Thread.kill(src_nb_thread)
        gtk_thread_abandon  #- needed because we're about to destroy widgets in dialog, for which they may be some pending gtk calls
    end
    dialog.destroy
    Gtk.timeout_remove(timeout_src_nb)

    if ok
        call_backend("booh-backend --source '#{srcdir}' --destination '#{destdir}' --config-skel '#{configskel}' --for-gui " +
                     "--verbose-level #{$verbose_level} --theme #{theme} --sizes #{sizes} --thumbnails-per-row #{nperrow} " +
                     "#{opt432 ? '--optimize-for-32' : ''} #{additional_booh_options}",
                     utf8(_("Please wait while scanning source directory...")),
                     'full scan',
                     { :closure_after => proc { open_file_user(configskel) } })
    end
end

def properties
    dialog = Gtk::Dialog.new(utf8(_("Properties of your album")),
                             $main_window,
                             Gtk::Dialog::MODAL | Gtk::Dialog::DESTROY_WITH_PARENT,
                             [Gtk::Stock::OK, Gtk::Dialog::RESPONSE_OK],
                             [Gtk::Stock::CANCEL, Gtk::Dialog::RESPONSE_CANCEL])
    
    source = $xmldoc.root.attributes['source']
    dest = $xmldoc.root.attributes['destination']
    theme = $xmldoc.root.attributes['theme']
    opt432 = !$xmldoc.root.attributes['optimize-for-32'].nil?
    nperrow = $xmldoc.root.attributes['thumbnails-per-row']
    limit_sizes = $xmldoc.root.attributes['limit-sizes']
    if limit_sizes
        limit_sizes = limit_sizes.split(/,/)
    end

    tooltips = Gtk::Tooltips.new
    frame1 = Gtk::Frame.new(utf8(_("Locations"))).add(tbl = Gtk::Table.new(0, 0, false))
    tbl.attach(Gtk::Label.new(utf8(_("Directory of source images/videos: "))),
               0, 1, 0, 1, Gtk::SHRINK, Gtk::SHRINK, 2, 2)
    tbl.attach(Gtk::Alignment.new(0, 0.5, 0, 0).add(Gtk::Label.new.set_markup('<i>' + source + '</i>')),
               1, 2, 0, 1, Gtk::FILL, Gtk::SHRINK, 2, 2)
    tbl.attach(Gtk::Label.new(utf8(_("Directory where the web-album is created: "))),
               0, 1, 2, 3, Gtk::SHRINK, Gtk::SHRINK, 2, 2)
    tbl.attach(Gtk::Alignment.new(0, 0.5, 0, 0).add(Gtk::Label.new.set_markup('<i>' + dest + '</i>')),
               1, 2, 2, 3, Gtk::FILL, Gtk::SHRINK, 2, 2)
    tbl.attach(Gtk::Label.new(utf8(_("Filename where this album's properties are stored: "))),
               0, 1, 3, 4, Gtk::SHRINK, Gtk::SHRINK, 2, 2)
    tbl.attach(Gtk::Alignment.new(0, 0.5, 0, 0).add(Gtk::Label.new.set_markup('<i>' + $orig_filename + '</i>')),
               1, 2, 3, 4, Gtk::FILL, Gtk::SHRINK, 2, 2)

    frame2 = Gtk::Frame.new(utf8(_("Configuration"))).add(vb = Gtk::VBox.new)
    vb.add(Gtk::HBox.new(false, 3).pack_start(Gtk::Label.new(utf8(_("Theme: "))), false, false, 0).
                         pack_start(theme_button = Gtk::Button.new(theme), false, false, 0))
    vb.add(Gtk::HBox.new(false, 3).pack_start(Gtk::Label.new(utf8(_("Sizes of images to generate: "))), false, false, 0).
                                   pack_start(sizes = Gtk::HBox.new, false, false, 0))
    vb.add(optimize432 = Gtk::CheckButton.new(utf8(_("Optimize for 3/2 aspect ratio"))).set_active(opt432))
    tooltips.set_tip(optimize432, utf8(_("Resize images with optimized sizes for 3/2 aspect ratio rather than 4/3 (typical aspect ratio of pictures from non digital cameras are 3/2 when pictures from digital cameras are 4/3)")), nil)
    vb.add(Gtk::HBox.new(false, 3).pack_start(Gtk::Label.new(utf8(_("Number of thumbnails per row: "))), false, false, 0).
                                   pack_start(nperrowradios = Gtk::HBox.new, false, false, 0))

    theme_sizes = []
    nperrows = []
    recreate_theme_config = proc {
        theme_sizes.each { |e| sizes.remove(e[:widget]) }
        theme_sizes = []
        select_theme(theme_button.label, 'all', optimize432.active?, nperrow)

        $images_size.each { |s|
            sizes.add(cb = Gtk::CheckButton.new(sizename(s['name'])))
            if limit_sizes
                if limit_sizes.include?(s['name'])
                    cb.active = true
                end
            else
                if !s['optional']
                    cb.active = true
                end
            end
            tooltips.set_tip(cb, utf8(s['description']), nil)
            theme_sizes << { :widget => cb, :value => s['name'] }
        }
        sizes.add(cb = Gtk::CheckButton.new(utf8(_('original'))))
        tooltips = Gtk::Tooltips.new
        tooltips.set_tip(cb, utf8(_("Include original image in web-album")), nil)
        if limit_sizes && limit_sizes.include?('original')
            cb.active = true
        end
        theme_sizes << { :widget => cb, :value => 'original' }
        sizes.show_all

        nperrows.each { |e| nperrowradios.remove(e[:widget]) }
        nperrow_group = nil
        nperrows = []
        $allowed_N_values.each { |n|
            if nperrow_group
                nperrowradios.add(rb = Gtk::RadioButton.new(nperrow_group, n.to_s, false))
            else
                nperrowradios.add(nperrow_group = rb = Gtk::RadioButton.new(n.to_s))
            end
            nperrowradios.add(Gtk::Label.new('  '))
            if nperrow && n.to_s == nperrow || !nperrow && $default_N == n
                rb.active = true
            end
            nperrows << { :widget => rb, :value => n.to_s }
        }
        nperrowradios.show_all
    }
    recreate_theme_config.call

    theme_button.signal_connect('clicked') {
        if newtheme = theme_choose(theme_button.label)
            limit_sizes = nil
            nperrow = nil
            theme_button.label = newtheme
            recreate_theme_config.call
        end
    }

    dialog.vbox.add(frame1)
    dialog.vbox.add(frame2)
    dialog.window_position = Gtk::Window::POS_MOUSE
    dialog.show_all

    keepon = true
    ok = true
    while keepon
        dialog.run { |response|
            if response == Gtk::Dialog::RESPONSE_OK
                if !theme_sizes.detect { |e| e[:value] != 'original' && e[:widget].active? }
                    show_popup(dialog, utf8(_("You need to select at least one size (not counting original).")))
                else
                    keepon = false
                end
            else
                keepon = ok = false
            end
        }
    end
    save_theme = theme_button.label
    save_limit_sizes = theme_sizes.find_all { |e| e[:widget].active? }.collect { |e| e[:value] }
    save_opt432 = optimize432.active?
    save_nperrow = nperrows.find { |e| e[:widget].active? }[:value]
    dialog.destroy

    if ok && (save_theme != theme || save_limit_sizes != limit_sizes || save_opt432 != opt432 || save_nperrow != nperrow)
        mark_document_as_dirty
        save_current_file
        call_backend("booh-backend --use-config '#{$filename}' --for-gui --verbose-level #{$verbose_level} " +
                     "--thumbnails-per-row #{save_nperrow} --theme #{save_theme} --sizes #{save_limit_sizes.join(',')} " +
                     "#{save_opt432 ? '--optimize-for-32' : ''} #{additional_booh_options}",
                     utf8(_("Please wait while scanning source directory...")),
                     'full scan',
                     { :closure_after => proc {
                             open_file($filename)
                             $modified = true
                         } })
    end
end

def merge_current
    save_current_file

    sel = $albums_tv.selection.selected_rows

    call_backend("booh-backend --merge-config-onedir '#{$filename}' --dir '#{from_utf8($current_path)}' --for-gui " +
                 "--verbose-level #{$verbose_level} #{additional_booh_options}",
                 utf8(_("Please wait while scanning source directory...")),
                 'one dir scan',
                 { :closure_after => proc {
                         open_file($filename)
                         $albums_tv.selection.select_path(sel[0])
                         $modified = true
                     } })
end

def merge_newsubs
    save_current_file

    sel = $albums_tv.selection.selected_rows

    call_backend("booh-backend --merge-config-subdirs '#{$filename}' --dir '#{from_utf8($current_path)}' --for-gui " +
                 "--verbose-level #{$verbose_level} #{additional_booh_options}",
                 utf8(_("Please wait while scanning source directory...")),
                 'one dir scan',
                 { :closure_after => proc {
                         open_file($filename)
                         $albums_tv.selection.select_path(sel[0])
                         $modified = true
                     } })
end

def merge
    save_current_file

    theme = $xmldoc.root.attributes['theme']
    limit_sizes = $xmldoc.root.attributes['limit-sizes']
    if limit_sizes
        limit_sizes = "--sizes #{limit_sizes}"
    end
    call_backend("booh-backend --merge-config '#{$filename}' --for-gui " +
                 "--verbose-level #{$verbose_level} --theme #{theme} #{limit_sizes} #{additional_booh_options}",
                 utf8(_("Please wait while scanning source directory...")),
                 'full scan',
                 { :closure_after => proc {
                         open_file($filename)
                         $modified = true
                     } })
end

def save_as_do
    fc = Gtk::FileChooserDialog.new(utf8(_("Select a new filename to store this album's properties")),
                                    nil,
                                    Gtk::FileChooser::ACTION_SAVE,
                                    nil,
                                    [Gtk::Stock::SAVE, Gtk::Dialog::RESPONSE_ACCEPT], [Gtk::Stock::CANCEL, Gtk::Dialog::RESPONSE_CANCEL])
    fc.transient_for = $main_window
    fc.add_shortcut_folder(File.expand_path("~/.booh"))
    fc.set_current_folder(File.expand_path("~/.booh"))
    fc.filename = $orig_filename
    if fc.run == Gtk::Dialog::RESPONSE_ACCEPT
        $orig_filename = fc.filename
        save_current_file_user
    end
    fc.destroy
end

def preferences
    dialog = Gtk::Dialog.new(utf8(_("Edit preferences")),
                             $main_window,
                             Gtk::Dialog::MODAL | Gtk::Dialog::DESTROY_WITH_PARENT,
                             [Gtk::Stock::OK, Gtk::Dialog::RESPONSE_OK],
                             [Gtk::Stock::CANCEL, Gtk::Dialog::RESPONSE_CANCEL])

    dialog.vbox.add(notebook = Gtk::Notebook.new)
    notebook.append_page(tbl = Gtk::Table.new(0, 0, false), Gtk::Label.new(utf8(_("Options"))))
    tbl.attach(Gtk::Alignment.new(1, 0.5, 0, 0).add(Gtk::Label.new.set_markup(utf8(_("Command for watching videos: ")))),
               0, 1, 0, 1, Gtk::FILL, Gtk::SHRINK, 2, 2)
    tbl.attach(Gtk::Alignment.new(0, 0.5, 1, 0).add(video_viewer_entry = Gtk::Entry.new.set_text($config['video-viewer'])),
               1, 2, 0, 1, Gtk::FILL, Gtk::SHRINK, 2, 2)
    tooltips = Gtk::Tooltips.new
    tooltips.set_tip(video_viewer_entry, utf8(_("Use %f to specify the filename;
for example: /usr/bin/mplayer %f")), nil)
    tbl.attach(Gtk::Alignment.new(1, 0.5, 0, 0).add(Gtk::Label.new.set_markup(utf8(_("Browser's command: ")))),
               0, 1, 1, 2, Gtk::FILL, Gtk::SHRINK, 2, 2)
    tbl.attach(Gtk::Alignment.new(0, 0.5, 1, 0).add(browser_entry = Gtk::Entry.new.set_text($config['browser'])),
               1, 2, 1, 2, Gtk::FILL, Gtk::SHRINK, 2, 2)
    tooltips.set_tip(browser_entry, utf8(_("Use %f to specify the filename;
for example: /usr/bin/mozilla-firefox -remote 'openURL(%f,new-window)' || /usr/bin/mozilla-firefox %f")), nil)
    tbl.attach(Gtk::Alignment.new(1, 0.5, 0, 0).add(smp_check = Gtk::CheckButton.new(utf8(_("Use symmetric multi-processing")))),
               0, 1, 2, 3, Gtk::FILL, Gtk::SHRINK, 2, 2)
    tbl.attach(Gtk::Alignment.new(0, 0.5, 1, 0).add(smp_hbox = Gtk::HBox.new.add(smp_spin = Gtk::SpinButton.new(2, 16, 1)).add(Gtk::Label.new(utf8(_("processors")))).set_sensitive(false)),
               1, 2, 2, 3, Gtk::FILL, Gtk::SHRINK, 2, 2)
    tooltips.set_tip(smp_check, utf8(_("When activated, this option allows the thumbnails creation to run faster. However, if you don't have a multi-processor machine, this will only slow down processing!")), nil)
    tbl.attach(nogestures_check = Gtk::CheckButton.new(utf8(_("Disable mouse gestures"))),
               0, 2, 3, 4, Gtk::FILL, Gtk::SHRINK, 2, 2)
    tooltips.set_tip(nogestures_check, utf8(_("Mouse gestures are 'unusual' mouse movements triggering special actions, and are great for speeding up your editions. Get details on available mouse gestures from the Help menu.")), nil)
    tbl.attach(emptycomments_check = Gtk::CheckButton.new(utf8(_("Use empty comments for new albums"))),
               0, 2, 4, 5, Gtk::FILL, Gtk::SHRINK, 2, 2)
    tooltips.set_tip(emptycomments_check, utf8(_("Normally, filenames are used as comments for new albums. Check this if you prefer empty comments.")), nil)
    tbl.attach(deleteondisk_check = Gtk::CheckButton.new(utf8(_("Delete original images/videos as well"))),
               0, 2, 5, 6, Gtk::FILL, Gtk::SHRINK, 2, 2)
    tooltips.set_tip(deleteondisk_check, utf8(_("Normally, deleting an image or video in booh only removes it from the web-album. If you check this option, the original file in source directory will be removed as well. Undo is possible, since actual deletion is performed only when web-album is saved.")), nil)
    smp_check.signal_connect('toggled') {
        if smp_check.active?
            smp_hbox.sensitive = true
        else
            smp_hbox.sensitive = false
        end
    }
    if $config['mproc']
        smp_check.active = true
        smp_spin.value = $config['mproc'].to_i
    end
    nogestures_check.active = $config['nogestures']
    emptycomments_check.active = $config['emptycomments']
    deleteondisk_check.active = $config['deleteondisk']

    notebook.append_page(tbl = Gtk::Table.new(0, 0, false), Gtk::Label.new(utf8(_("Advanced"))))
    tbl.attach(Gtk::Label.new.set_markup(utf8(_("Options to pass to <i>convert</i> when\nperforming 'enhance contrast': "))),
               0, 1, 0, 1, Gtk::SHRINK, Gtk::SHRINK, 2, 2)
    tbl.attach(enhance_entry = Gtk::Entry.new.set_text($config['convert-enhance'] || $convert_enhance).set_size_request(250, -1),
               1, 2, 0, 1, Gtk::FILL, Gtk::SHRINK, 2, 2)

    dialog.vbox.show_all
    dialog.run { |response|
        if response == Gtk::Dialog::RESPONSE_OK
            $config['video-viewer'] = video_viewer_entry.text
            $config['browser'] = browser_entry.text
            if smp_check.active?
                $config['mproc'] = smp_spin.value.to_i
            else
                $config.delete('mproc')
            end
            $config['nogestures'] = nogestures_check.active?
            $config['emptycomments'] = emptycomments_check.active?
            $config['deleteondisk'] = deleteondisk_check.active?

            $config['convert-enhance'] = enhance_entry.text
        end
    }
    dialog.destroy
end

def perform_undo
    if $undo_tb.sensitive?
        $redo_tb.sensitive = $redo_mb.sensitive = true
        if not more_undoes = UndoHandler.undo($statusbar)
            $undo_tb.sensitive = $undo_mb.sensitive = false
        end
    end
end

def perform_redo
    if $redo_tb.sensitive?
        $undo_tb.sensitive = $undo_mb.sensitive = true
        if not more_redoes = UndoHandler.redo($statusbar)
            $redo_tb.sensitive = $redo_mb.sensitive = false
        end
    end
end

def show_one_click_explanation(intro)
    show_popup($main_window, utf8(_("<b>One-Click tools.</b>

%s When such a tool is activated
(<span foreground='darkblue'>Rotate clockwise</span>, <span foreground='darkblue'>Rotate counter-clockwise</span>, <span foreground='darkblue'>Enhance</span> or <span foreground='darkblue'>Delete</span>), clicking
on a thumbnail will immediately apply the desired action.

Click the <span foreground='darkblue'>None</span> icon when you're finished with One-Click tools.
") % intro))
end

def get_license
    return <<"EOF"
                    GNU GENERAL PUBLIC LICENSE
                       Version 2, June 1991

 Copyright (C) 1989, 1991 Free Software Foundation, Inc.
                          675 Mass Ave, Cambridge, MA 02139, USA
 Everyone is permitted to copy and distribute verbatim copies
 of this license document, but changing it is not allowed.

                            Preamble

  The licenses for most software are designed to take away your
freedom to share and change it.  By contrast, the GNU General Public
License is intended to guarantee your freedom to share and change free
software--to make sure the software is free for all its users.  This
General Public License applies to most of the Free Software
Foundation's software and to any other program whose authors commit to
using it.  (Some other Free Software Foundation software is covered by
the GNU Library General Public License instead.)  You can apply it to
your programs, too.

  When we speak of free software, we are referring to freedom, not
price.  Our General Public Licenses are designed to make sure that you
have the freedom to distribute copies of free software (and charge for
this service if you wish), that you receive source code or can get it
if you want it, that you can change the software or use pieces of it
in new free programs; and that you know you can do these things.

  To protect your rights, we need to make restrictions that forbid
anyone to deny you these rights or to ask you to surrender the rights.
These restrictions translate to certain responsibilities for you if you
distribute copies of the software, or if you modify it.

  For example, if you distribute copies of such a program, whether
gratis or for a fee, you must give the recipients all the rights that
you have.  You must make sure that they, too, receive or can get the
source code.  And you must show them these terms so they know their
rights.

  We protect your rights with two steps: (1) copyright the software, and
(2) offer you this license which gives you legal permission to copy,
distribute and/or modify the software.

  Also, for each author's protection and ours, we want to make certain
that everyone understands that there is no warranty for this free
software.  If the software is modified by someone else and passed on, we
want its recipients to know that what they have is not the original, so
that any problems introduced by others will not reflect on the original
authors' reputations.

  Finally, any free program is threatened constantly by software
patents.  We wish to avoid the danger that redistributors of a free
program will individually obtain patent licenses, in effect making the
program proprietary.  To prevent this, we have made it clear that any
patent must be licensed for everyone's free use or not licensed at all.

  The precise terms and conditions for copying, distribution and
modification follow.


                    GNU GENERAL PUBLIC LICENSE
   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION

  0. This License applies to any program or other work which contains
a notice placed by the copyright holder saying it may be distributed
under the terms of this General Public License.  The "Program", below,
refers to any such program or work, and a "work based on the Program"
means either the Program or any derivative work under copyright law:
that is to say, a work containing the Program or a portion of it,
either verbatim or with modifications and/or translated into another
language.  (Hereinafter, translation is included without limitation in
the term "modification".)  Each licensee is addressed as "you".

Activities other than copying, distribution and modification are not
covered by this License; they are outside its scope.  The act of
running the Program is not restricted, and the output from the Program
is covered only if its contents constitute a work based on the
Program (independent of having been made by running the Program).
Whether that is true depends on what the Program does.

  1. You may copy and distribute verbatim copies of the Program's
source code as you receive it, in any medium, provided that you
conspicuously and appropriately publish on each copy an appropriate
copyright notice and disclaimer of warranty; keep intact all the
notices that refer to this License and to the absence of any warranty;
and give any other recipients of the Program a copy of this License
along with the Program.

You may charge a fee for the physical act of transferring a copy, and
you may at your option offer warranty protection in exchange for a fee.

  2. You may modify your copy or copies of the Program or any portion
of it, thus forming a work based on the Program, and copy and
distribute such modifications or work under the terms of Section 1
above, provided that you also meet all of these conditions:

    a) You must cause the modified files to carry prominent notices
    stating that you changed the files and the date of any change.

    b) You must cause any work that you distribute or publish, that in
    whole or in part contains or is derived from the Program or any
    part thereof, to be licensed as a whole at no charge to all third
    parties under the terms of this License.

    c) If the modified program normally reads commands interactively
    when run, you must cause it, when started running for such
    interactive use in the most ordinary way, to print or display an
    announcement including an appropriate copyright notice and a
    notice that there is no warranty (or else, saying that you provide
    a warranty) and that users may redistribute the program under
    these conditions, and telling the user how to view a copy of this
    License.  (Exception: if the Program itself is interactive but
    does not normally print such an announcement, your work based on
    the Program is not required to print an announcement.)


These requirements apply to the modified work as a whole.  If
identifiable sections of that work are not derived from the Program,
and can be reasonably considered independent and separate works in
themselves, then this License, and its terms, do not apply to those
sections when you distribute them as separate works.  But when you
distribute the same sections as part of a whole which is a work based
on the Program, the distribution of the whole must be on the terms of
this License, whose permissions for other licensees extend to the
entire whole, and thus to each and every part regardless of who wrote it.

Thus, it is not the intent of this section to claim rights or contest
your rights to work written entirely by you; rather, the intent is to
exercise the right to control the distribution of derivative or
collective works based on the Program.

In addition, mere aggregation of another work not based on the Program
with the Program (or with a work based on the Program) on a volume of
a storage or distribution medium does not bring the other work under
the scope of this License.

  3. You may copy and distribute the Program (or a work based on it,
under Section 2) in object code or executable form under the terms of
Sections 1 and 2 above provided that you also do one of the following:

    a) Accompany it with the complete corresponding machine-readable
    source code, which must be distributed under the terms of Sections
    1 and 2 above on a medium customarily used for software interchange; or,

    b) Accompany it with a written offer, valid for at least three
    years, to give any third party, for a charge no more than your
    cost of physically performing source distribution, a complete
    machine-readable copy of the corresponding source code, to be
    distributed under the terms of Sections 1 and 2 above on a medium
    customarily used for software interchange; or,

    c) Accompany it with the information you received as to the offer
    to distribute corresponding source code.  (This alternative is
    allowed only for noncommercial distribution and only if you
    received the program in object code or executable form with such
    an offer, in accord with Subsection b above.)

The source code for a work means the preferred form of the work for
making modifications to it.  For an executable work, complete source
code means all the source code for all modules it contains, plus any
associated interface definition files, plus the scripts used to
control compilation and installation of the executable.  However, as a
special exception, the source code distributed need not include
anything that is normally distributed (in either source or binary
form) with the major components (compiler, kernel, and so on) of the
operating system on which the executable runs, unless that component
itself accompanies the executable.

If distribution of executable or object code is made by offering
access to copy from a designated place, then offering equivalent
access to copy the source code from the same place counts as
distribution of the source code, even though third parties are not
compelled to copy the source along with the object code.


  4. You may not copy, modify, sublicense, or distribute the Program
except as expressly provided under this License.  Any attempt
otherwise to copy, modify, sublicense or distribute the Program is
void, and will automatically terminate your rights under this License.
However, parties who have received copies, or rights, from you under
this License will not have their licenses terminated so long as such
parties remain in full compliance.

  5. You are not required to accept this License, since you have not
signed it.  However, nothing else grants you permission to modify or
distribute the Program or its derivative works.  These actions are
prohibited by law if you do not accept this License.  Therefore, by
modifying or distributing the Program (or any work based on the
Program), you indicate your acceptance of this License to do so, and
all its terms and conditions for copying, distributing or modifying
the Program or works based on it.

  6. Each time you redistribute the Program (or any work based on the
Program), the recipient automatically receives a license from the
original licensor to copy, distribute or modify the Program subject to
these terms and conditions.  You may not impose any further
restrictions on the recipients' exercise of the rights granted herein.
You are not responsible for enforcing compliance by third parties to
this License.

  7. If, as a consequence of a court judgment or allegation of patent
infringement or for any other reason (not limited to patent issues),
conditions are imposed on you (whether by court order, agreement or
otherwise) that contradict the conditions of this License, they do not
excuse you from the conditions of this License.  If you cannot
distribute so as to satisfy simultaneously your obligations under this
License and any other pertinent obligations, then as a consequence you
may not distribute the Program at all.  For example, if a patent
license would not permit royalty-free redistribution of the Program by
all those who receive copies directly or indirectly through you, then
the only way you could satisfy both it and this License would be to
refrain entirely from distribution of the Program.

If any portion of this section is held invalid or unenforceable under
any particular circumstance, the balance of the section is intended to
apply and the section as a whole is intended to apply in other
circumstances.

It is not the purpose of this section to induce you to infringe any
patents or other property right claims or to contest validity of any
such claims; this section has the sole purpose of protecting the
integrity of the free software distribution system, which is
implemented by public license practices.  Many people have made
generous contributions to the wide range of software distributed
through that system in reliance on consistent application of that
system; it is up to the author/donor to decide if he or she is willing
to distribute software through any other system and a licensee cannot
impose that choice.

This section is intended to make thoroughly clear what is believed to
be a consequence of the rest of this License.


  8. If the distribution and/or use of the Program is restricted in
certain countries either by patents or by copyrighted interfaces, the
original copyright holder who places the Program under this License
may add an explicit geographical distribution limitation excluding
those countries, so that distribution is permitted only in or among
countries not thus excluded.  In such case, this License incorporates
the limitation as if written in the body of this License.

  9. The Free Software Foundation may publish revised and/or new versions
of the General Public License from time to time.  Such new versions will
be similar in spirit to the present version, but may differ in detail to
address new problems or concerns.

Each version is given a distinguishing version number.  If the Program
specifies a version number of this License which applies to it and "any
later version", you have the option of following the terms and conditions
either of that version or of any later version published by the Free
Software Foundation.  If the Program does not specify a version number of
this License, you may choose any version ever published by the Free Software
Foundation.

  10. If you wish to incorporate parts of the Program into other free
programs whose distribution conditions are different, write to the author
to ask for permission.  For software which is copyrighted by the Free
Software Foundation, write to the Free Software Foundation; we sometimes
make exceptions for this.  Our decision will be guided by the two goals
of preserving the free status of all derivatives of our free software and
of promoting the sharing and reuse of software generally.

                            NO WARRANTY

  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS
TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE
PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
REPAIR OR CORRECTION.

  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES.
EOF
end

def create_menu_and_toolbar
    
    #- menu
    mb = Gtk::MenuBar.new

    filemenu = Gtk::MenuItem.new(utf8(_("_File")))
    filesubmenu = Gtk::Menu.new
    filesubmenu.append(new       = Gtk::ImageMenuItem.new(Gtk::Stock::NEW))
    filesubmenu.append(open      = Gtk::ImageMenuItem.new(Gtk::Stock::OPEN))
    filesubmenu.append(            Gtk::SeparatorMenuItem.new)
    filesubmenu.append($save     = Gtk::ImageMenuItem.new(Gtk::Stock::SAVE).set_sensitive(false))
    filesubmenu.append($save_as  = Gtk::ImageMenuItem.new(Gtk::Stock::SAVE_AS).set_sensitive(false))
    filesubmenu.append(            Gtk::SeparatorMenuItem.new)
    tooltips = Gtk::Tooltips.new
    filesubmenu.append($merge_current = Gtk::ImageMenuItem.new(utf8(_("Merge new/removed images/videos in current subalbum"))).set_sensitive(false))
    $merge_current.image = Gtk::Image.new("#{$FPATH}/images/stock-reset-16.png")
    tooltips.set_tip($merge_current, utf8(_("Take into account new/removed images/videos in currently viewed subalbum")), nil)
    filesubmenu.append($merge_newsubs = Gtk::ImageMenuItem.new(utf8(_("Merge new subalbums (subdirectories) in current subalbum"))).set_sensitive(false))
    $merge_newsubs.image = Gtk::Image.new("#{$FPATH}/images/stock-reset-16.png")
    tooltips.set_tip($merge_newsubs, utf8(_("Take into account new subalbums in currently viewed subalbum (and only here)")), nil)
    filesubmenu.append($merge    = Gtk::ImageMenuItem.new(utf8(_("Scan source directory to merge new subalbums and new/removed images/videos"))).set_sensitive(false))
    $merge.image = Gtk::Image.new("#{$FPATH}/images/stock-reset-16.png")
    tooltips.set_tip($merge, utf8(_("Take into account new subalbums (subdirectories) and new/removed images/videos in existing subalbums (anywhere)")), nil)
    filesubmenu.append(            Gtk::SeparatorMenuItem.new)
    filesubmenu.append($generate = Gtk::ImageMenuItem.new(utf8(_("Generate web-album"))).set_sensitive(false))
    $generate.image = Gtk::Image.new("#{$FPATH}/images/stock-web-16.png")
    tooltips.set_tip($generate, utf8(_("(Re)generate web-album from latest changes into the destination directory")), nil)
    filesubmenu.append($view_wa = Gtk::ImageMenuItem.new(utf8(_("View web-album with browser"))).set_sensitive(false))
    $view_wa.image = Gtk::Image.new("#{$FPATH}/images/stock-view-webalbum-16.png")
    filesubmenu.append(            Gtk::SeparatorMenuItem.new)
    filesubmenu.append($properties = Gtk::ImageMenuItem.new(Gtk::Stock::PROPERTIES).set_sensitive(false))
    tooltips.set_tip($properties, utf8(_("View and modify properties of the web-album")), nil)
    filesubmenu.append(            Gtk::SeparatorMenuItem.new)
    filesubmenu.append(quit      = Gtk::ImageMenuItem.new(Gtk::Stock::QUIT))
    filemenu.set_submenu(filesubmenu)
    mb.append(filemenu)

    new.signal_connect('activate') { new_album }
    open.signal_connect('activate') { open_file_popup }
    $save.signal_connect('activate') { save_current_file_user }
    $save_as.signal_connect('activate') { save_as_do }
    $merge_current.signal_connect('activate') { merge_current }
    $merge_newsubs.signal_connect('activate') { merge_newsubs }
    $merge.signal_connect('activate') { merge }
    $generate.signal_connect('activate') {
        save_current_file
        call_backend("booh-backend --config '#{$filename}' --verbose-level #{$verbose_level} #{additional_booh_options}",
                     utf8(_("Please wait while generating web-album...\nThis may take a while, please be patient.")),
                     'web-album',
                     { :successmsg => utf8(_("Your web-album is now ready in directory `%s'.
Click to view it in your browser:") % $xmldoc.root.attributes['destination']),
                       :successmsg_linkurl => $xmldoc.root.attributes['destination'],
                       :failuremsg => utf8(_("There was something wrong when generating the web-album, sorry.")),
                       :closure_after => proc {
                             $xmldoc.elements.each('//dir') { |elem|
                                 elem.add_attribute('already-generated', 'true')
                             }
                             UndoHandler.cleanup   #- prevent save_changes to mark current dir as not already generated
                             $undo_tb.sensitive = $undo_mb.sensitive = false
                             $redo_tb.sensitive = $redo_mb.sensitive = false
                             save_current_file
                             $generated_outofline = true
                         }})
    }
    $view_wa.signal_connect('activate') {
        indexhtml = $xmldoc.root.attributes['destination'] + '/index.html'
        if File.exists?(indexhtml)
            open_url(indexhtml)
        else
            show_popup($main_window, utf8(_("Seems like you should generate the web-album first.")))
        end
    }
    $properties.signal_connect('activate') { properties }

    quit.signal_connect('activate') { try_quit }

    editmenu = Gtk::MenuItem.new(utf8(_("_Edit")))
    editsubmenu = Gtk::Menu.new
    editsubmenu.append($undo_mb = Gtk::ImageMenuItem.new(Gtk::Stock::UNDO).set_sensitive(false))
    editsubmenu.append($redo_mb = Gtk::ImageMenuItem.new(Gtk::Stock::REDO).set_sensitive(false))
    editsubmenu.append(           Gtk::SeparatorMenuItem.new)
    editsubmenu.append($remove_all_captions = Gtk::ImageMenuItem.new(utf8(_("Remove all captions in this sub-album"))).set_sensitive(false))
    $remove_all_captions.image = Gtk::Image.new("#{$FPATH}/images/stock-tool-eraser-16.png")
    tooltips.set_tip($remove_all_captions, utf8(_("Mainly useful when you don't want to type any caption, that will remove default captions made of filenames")), nil)
    editsubmenu.append(           Gtk::SeparatorMenuItem.new)
    editsubmenu.append(prefs    = Gtk::ImageMenuItem.new(Gtk::Stock::PREFERENCES))
    editmenu.set_submenu(editsubmenu)
    mb.append(editmenu)

    $remove_all_captions.signal_connect('activate') { remove_all_captions }

    prefs.signal_connect('activate') { preferences }
    
    helpmenu = Gtk::MenuItem.new(utf8(_("_Help")))
    helpsubmenu = Gtk::Menu.new
    helpsubmenu.append(one_click = Gtk::ImageMenuItem.new(utf8(_("One-click tools"))))
    one_click.image = Gtk::Image.new("#{$FPATH}/images/stock-tools-16.png")
    helpsubmenu.append(speed = Gtk::ImageMenuItem.new(utf8(_("Speedup: key shortcuts and mouse gestures"))))
    speed.image = Gtk::Image.new("#{$FPATH}/images/stock-info-16.png")
    helpsubmenu.append(        Gtk::SeparatorMenuItem.new)
    helpsubmenu.append(about = Gtk::ImageMenuItem.new(Gtk::Stock::ABOUT))
    helpmenu.set_submenu(helpsubmenu)
    mb.append(helpmenu)

    one_click.signal_connect('activate') {
        show_one_click_explanation(_("One-Click tools are available in the toolbar."))
    }
    
    speed.signal_connect('activate') {
        show_popup($main_window, utf8(_("<span size='large' weight='bold'>Key shortcuts:</span>

<span foreground='darkblue'>Tab</span>: go to next image caption and select text (begin typing to erase current text!)
<span foreground='darkblue'>Shift-Tab</span>: go to previous image caption
<span foreground='darkblue'>Control-Left/Right/Up/Down</span>: go to specified direction's image caption
<span foreground='darkblue'>Control-Enter</span>: for an image, open larger view; for a video, launch player
<span foreground='darkblue'>Control-Delete</span>: delete image
<span foreground='darkblue'>Shift-Left/Right/Up/Down</span>: move image left/right/up/down
<span foreground='darkblue'>Alt-Left/Right</span>: rotate image clockwise/counter-clockwise
<span foreground='darkblue'>Control-z</span>: undo
<span foreground='darkblue'>Control-r</span>: redo

<span size='large' weight='bold'>Mouse gestures:</span>

Mouse gestures are 'unusual' mouse movements triggering special actions, and are great
for speeding up your editions. If bothered, you can disable them from Edit/Preferences.

<span foreground='darkblue'>Left click, drag to the right, release</span>: rotate image clockwise
<span foreground='darkblue'>Left click, drag to the left, release</span>: rotate image counter-clockwise
<span foreground='darkblue'>Left click, drag to the bottom, release</span>: remove image
<span foreground='darkblue'>Left click, hold left button, right click</span>: undo
<span foreground='darkblue'>Right click, hold right button, left click</span>: redo
")), { :pos_centered => true, :not_transient => true })
    }


    about.signal_connect('activate') {
        Gtk::AboutDialog.set_url_hook { |dialog, url| open_url(url) }
        Gtk::AboutDialog.show($main_window, { :name => 'booh',
                                              :version => $VERSION,
                                              :copyright => 'Copyright (c) 2005 Guillaume Cottenceau',
                                              :license => get_license,
                                              :website => 'http://zarb.org/~gc/html/booh.html',
                                              :authors => [ 'Guillaume Cottenceau' ],
                                              :artists => [ 'Ayo73' ],
                                              :comments => utf8(_("''The Web-Album of choice for discriminating Linux users''")),
                                              :translator_credits => utf8(_('Japanese: Masao Mutoh
German: Roland Eckert
French: Guillaume Cottenceau')),
                                              :logo => Gdk::Pixbuf.new("#{$FPATH}/images/logo.png") })
    }


    #- toolbar
    tb = Gtk::Toolbar.new

    tb.insert(-1, open = Gtk::MenuToolButton.new(Gtk::Stock::OPEN))
    open.label = utf8(_("Open"))  #- to avoid missing gtk2 l10n catalogs
    open.menu = Gtk::Menu.new
    open.signal_connect('clicked') { open_file_popup }
    open.signal_connect('show-menu') {
        lastopens = Gtk::Menu.new
        j = 0
        if $config['last-opens']
            $config['last-opens'].reverse.each { |e|
                lastopens.attach(item = Gtk::ImageMenuItem.new(e, false), 0, 1, j, j + 1)
                item.signal_connect('activate') {
                    if ask_save_modifications(utf8(_("Save this album?")),
                                              utf8(_("Do you want to save the changes to this album?")),
                                              { :yes => Gtk::Stock::YES, :no => Gtk::Stock::NO })
                        push_mousecursor_wait
                        msg = open_file_user(from_utf8(e))
                        pop_mousecursor
                        if msg
                            show_popup($main_window, msg)
                        end
                    end
                }
                j += 1
            }
            lastopens.show_all
        end
        open.menu = lastopens
    }

    tb.insert(-1, Gtk::SeparatorToolItem.new)

    tb.insert(-1, $r90 = Gtk::ToggleToolButton.new)
    $r90.icon_widget = Gtk::Image.new("#{$FPATH}/images/stock-rotate-90-16.png")
    $r90.label = utf8(_("Rotate"))
    tb.insert(-1, $r270 = Gtk::ToggleToolButton.new)
    $r270.icon_widget = Gtk::Image.new("#{$FPATH}/images/stock-rotate-270-16.png")
    $r270.label = utf8(_("Rotate"))
    tb.insert(-1, $enhance = Gtk::ToggleToolButton.new)
    $enhance.icon_widget = Gtk::Image.new("#{$FPATH}/images/stock-channels-16.png")
    $enhance.label = utf8(_("Enhance"))
    tb.insert(-1, $delete = Gtk::ToggleToolButton.new(Gtk::Stock::DELETE))
    $delete.label = utf8(_("Delete"))  #- to avoid missing gtk2 l10n catalogs
    tb.insert(-1, nothing = Gtk::ToolButton.new('').set_sensitive(false))
    nothing.icon_widget = Gtk::Image.new("#{$FPATH}/images/stock-none-16.png")
    nothing.label = utf8(_("None"))

    tb.insert(-1, Gtk::SeparatorToolItem.new)

    tb.insert(-1, $undo_tb = Gtk::ToolButton.new(Gtk::Stock::UNDO).set_sensitive(false))
    tb.insert(-1, $redo_tb = Gtk::ToolButton.new(Gtk::Stock::REDO).set_sensitive(false))


    $undo_tb.signal_connect('clicked')  { perform_undo }
    $undo_mb.signal_connect('activate') { perform_undo }
    $redo_tb.signal_connect('clicked')  { perform_redo }
    $redo_mb.signal_connect('activate') { perform_redo }

    one_click_explain_try = Proc.new {
        if !$config['one-click-explained']
            show_one_click_explanation(_("You have just clicked on a One-Click tool."))
            $config['one-click-explained'] = true
        end
    }

    $r90.signal_connect('toggled') {
        if $r90.active?
            set_mousecursor(Gdk::Cursor::SB_RIGHT_ARROW)
            one_click_explain_try.call
            $r270.active = false
            $enhance.active = false
            $delete.active = false
            nothing.sensitive = true
        else
            if !$r270.active? && !$enhance.active? && !$delete.active?
                set_mousecursor_normal
                nothing.sensitive = false
            else
                nothing.sensitive = true
            end
        end
    }
    $r270.signal_connect('toggled') {
        if $r270.active?
            set_mousecursor(Gdk::Cursor::SB_LEFT_ARROW)
            one_click_explain_try.call
            $r90.active = false
            $enhance.active = false
            $delete.active = false
            nothing.sensitive = true
        else
            if !$r90.active? && !$enhance.active? && !$delete.active?
                set_mousecursor_normal
                nothing.sensitive = false
            else
                nothing.sensitive = true
            end
        end
    }
    $enhance.signal_connect('toggled') {
        if $enhance.active?
            set_mousecursor(Gdk::Cursor::SPRAYCAN)
            one_click_explain_try.call
            $r90.active = false
            $r270.active = false
            $delete.active = false
            nothing.sensitive = true
        else
            if !$r90.active? && !$r270.active? && !$delete.active?
                set_mousecursor_normal
                nothing.sensitive = false
            else
                nothing.sensitive = true
            end
        end
    }
    $delete.signal_connect('toggled') {
        if $delete.active?
            set_mousecursor(Gdk::Cursor::PIRATE)
            one_click_explain_try.call
            $r90.active = false
            $r270.active = false
            $enhance.active = false
            nothing.sensitive = true
        else
            if !$r90.active? && !$r270.active? && !$enhance.active?
                set_mousecursor_normal
                nothing.sensitive = false
            else
                nothing.sensitive = true
            end
        end
    }
    nothing.signal_connect('clicked') {
        $r90.active = $r270.active = $enhance.active = $delete.active = false
        set_mousecursor_normal
    }

    return [ mb, tb ]
end

def gtk_thread_protect(&proc)
    if Thread.current == Thread.main
        proc.call
    else
        $protect_gtk_pending_calls.synchronize {
            $gtk_pending_calls << proc
        }
    end
end

def gtk_thread_abandon
    $protect_gtk_pending_calls.try_lock
    $gtk_pending_calls = []
    $protect_gtk_pending_calls.unlock
end

def ask_password_protect
    value = $xmldir.attributes['password-protect']

    dialog = Gtk::Dialog.new(utf8(_("Password protect this sub-album")),
                             $main_window,
                             Gtk::Dialog::MODAL | Gtk::Dialog::DESTROY_WITH_PARENT,
                             [Gtk::Stock::OK, Gtk::Dialog::RESPONSE_OK],
                             [Gtk::Stock::CANCEL, Gtk::Dialog::RESPONSE_CANCEL])

    lbl = Gtk::Label.new
    lbl.markup = utf8(
_("You can choose to <b>password protect</b> the sub-album '%s' (only available
if you plan to publish your web-album with an Apache web-server). This will use
the .htaccess/.htpasswd feature of Apache (not so strongly crypted password, but
generally ok for protecting web contents). Users will be prompted with a dialog
asking for a username and a password, failure to give the correct pair will
block access.
") % File.basename($current_path))
    dialog.vbox.add(lbl)
    dialog.vbox.add(Gtk::Alignment.new(0.5, 0.5, 0, 0).add(Gtk::HBox.new.add(rb_no = Gtk::RadioButton.new(utf8(_("free access")))).
                                                                         add(rb_yes = Gtk::RadioButton.new(rb_no, utf8(_("password protect with password file:")))).
                                                                         add(file = Gtk::Entry.new)))
    dialog.vbox.add(Gtk::Alignment.new(0.5, 0.5, 0.5, 0.2).add(Gtk::HBox.new.add(bt_help = Gtk::Button.new(utf8(_("help about password file")))).
                                                                             add(Gtk::Label.new).
                                                                             add(bt_gen = Gtk::Button.new(utf8(_("generate a password file"))))))
    dialog.window_position = Gtk::Window::POS_MOUSE
    dialog.show_all
    if value.nil?
        rb_no.active = true
    else
        rb_yes.active = true
        file.text = value
    end

    bt_help.signal_connect('clicked') {
        show_popup(dialog, utf8(
_("Password protection proposed here uses the .htaccess/.htpasswd features
proposed by Apache. So first, be sure you will publish your web-album on an
Apache web-server. Second, you will need to have a .htpasswd file accessible
by Apache somewhere on the web-server disks. The password file you must
provide in the dialog when choosing to password protect is the full absolute
path to access this file <b>on the web-server</b> (not on your machine). Note
that if you use a relative path, it will be considered relative to the
Document Root of the Apache configuration.")))
    }

    bt_gen.signal_connect('clicked') {
        gendialog = Gtk::Dialog.new(utf8(_("Generate a password file")),
                                    dialog,
                                    Gtk::Dialog::MODAL | Gtk::Dialog::DESTROY_WITH_PARENT,
                                    [Gtk::Stock::OK, Gtk::Dialog::RESPONSE_OK],
                                    [Gtk::Stock::CANCEL, Gtk::Dialog::RESPONSE_CANCEL])
        
        lbl = Gtk::Label.new
        lbl.text = utf8(
_("I can generate a password file (.htpasswd for Apache) for you. Just type
the username and password you wish to put in it below and validate."))
        gendialog.vbox.add(lbl)
        gendialog.vbox.add(Gtk::Alignment.new(0.5, 0.5, 0, 0).add(Gtk::HBox.new.add(Gtk::Label.new(utf8(_('Username:')))).
                                                                                add(user = Gtk::Entry.new).
                                                                                add(Gtk::Label.new(utf8(_('Password:')))).
                                                                                add(pass = Gtk::Entry.new)))
        pass.visibility = false
        gendialog.window_position = Gtk::Window::POS_MOUSE
        gendialog.show_all
        gendialog.run { |response|
            u = user.text
            p = pass.text
            gendialog.destroy
            if response == Gtk::Dialog::RESPONSE_OK
                def rand_letter
                    ary = ('a'..'z').to_a + ('A'..'Z').to_a + ('0'..'9').to_a + [ '.', '/' ]
                    return ary[rand(ary.length)]
                end
                fout = Tempfile.new("htpasswd")
                fout.write("#{u}:#{p.crypt(rand_letter + rand_letter)}\n")
                fout.close
                File.chmod(0644, fout.path)
                show_popup(dialog, utf8(
_("The file <b>%s</b> now contains the username and the crypted password. Now
copy it to a suitable location on the machine hosting the Apache web-server (better not
below the Document Root), and specify this location in the password protect dialog.") % fout.path), { :selectable => true })
            end
        }
    }

    dialog.run { |response|
        if rb_no.active?
            newval = nil
        else
            newval = file.text
        end
        dialog.destroy
        if response == Gtk::Dialog::RESPONSE_OK && value != newval
            $modified = true
            msg 3, "changing password protection of #{$current_path} to #{newval}"
            if newval.nil?
                $xmldir.delete_attribute('password-protect')
            else
                $xmldir.add_attribute('password-protect', newval)
            end
            save_undo(_("set password protection for %s") % File.basename($current_path),
                      Proc.new {
                          if value.nil?
                              $xmldir.delete_attribute('password-protect')
                          else
                              $xmldir.add_attribute('password-protect', value)
                          end
                          Proc.new {
                              if newval.nil?
                                  $xmldir.delete_attribute('password-protect')
                              else
                                  $xmldir.add_attribute('password-protect', newval)
                              end
                          }
                      })
            show_password_protections
        end
    }
end

def create_main_window

    mb, tb = create_menu_and_toolbar

    $albums_tv = Gtk::TreeView.new
    $albums_tv.set_size_request(120, -1)
    $albums_tv.append_column(Gtk::TreeViewColumn.new('', Gtk::CellRendererPixbuf.new, { :pixbuf => 2 }))
    $albums_tv.append_column(tcol = Gtk::TreeViewColumn.new('', Gtk::CellRendererText.new, { :text => 0 }))
    $albums_tv.expander_column = tcol
    $albums_tv.set_headers_visible(false)
    $albums_tv.selection.signal_connect('changed') { |w|
        push_mousecursor_wait
        save_changes
        iter = w.selected
        if !iter
            msg 3, "no selection"
        else
            $current_path = $albums_ts.get_value(iter, 1)
            change_dir
        end
        pop_mousecursor
    }
    $albums_tv.signal_connect('button-release-event') { |w, event|
        if event.event_type == Gdk::Event::BUTTON_RELEASE && event.button == 3 && !$current_path.nil?
            menu = Gtk::Menu.new
            menu.append(passprotect = Gtk::ImageMenuItem.new(utf8(_("Password protect"))))
            passprotect.image = Gtk::Image.new("#{$FPATH}/images/galeon-secure.png")
            passprotect.signal_connect('activate') { ask_password_protect }
            menu.show_all
            menu.popup(nil, nil, event.button, event.time)
        end
    }

    $albums_ts = Gtk::TreeStore.new(String, String, Gdk::Pixbuf)
    $albums_tv.set_model($albums_ts)
    $albums_tv.signal_connect('realize') { $albums_tv.grab_focus }

    albums_sw = Gtk::ScrolledWindow.new(nil, nil)
    albums_sw.set_policy(Gtk::POLICY_NEVER, Gtk::POLICY_AUTOMATIC)
    albums_sw.add_with_viewport($albums_tv)

    $notebook = Gtk::Notebook.new
    create_subalbums_page
    $notebook.append_page($subalbums_sw, Gtk::Label.new(utf8(_("Sub-albums page"))))
    create_auto_table
    $notebook.append_page($autotable_sw, Gtk::Label.new(utf8(_("Thumbnails page"))))
    $notebook.show_all
    $notebook.signal_connect('switch-page') { |w, page, num|
        if num == 0
            $delete.active = false
            $delete.sensitive = false
        else
            $delete.sensitive = true
        end
        if $xmldir && $subalbums_edits[$xmldir.attributes['path']] && textview = $subalbums_edits[$xmldir.attributes['path']][:editzone]
            if num == 0
                textview.buffer.text = $thumbnails_title.buffer.text
            else
                if $notebook.get_tab_label($autotable_sw).sensitive?
                    $thumbnails_title.buffer.text = textview.buffer.text
                end
            end
        end
    }

    paned = Gtk::HPaned.new
    paned.pack1(albums_sw, false, false)
    paned.pack2($notebook, true, true)

    main_vbox = Gtk::VBox.new(false, 0)
    main_vbox.pack_start(mb, false, false)
    main_vbox.pack_start(tb, false, false)
    main_vbox.pack_start(paned, true, true)
    main_vbox.pack_end($statusbar = Gtk::Statusbar.new, false, false)

    $main_window = Gtk::Window.new
    $main_window.add(main_vbox)
    $main_window.signal_connect('delete-event') {
        try_quit({ :disallow_cancel => true })
    }

    #- read/save size and position of window
    if $config['pos-x'] && $config['pos-y']
        $main_window.move($config['pos-x'].to_i, $config['pos-y'].to_i)
    else
        $main_window.window_position = Gtk::Window::POS_CENTER
    end
    msg 3, "size: #{$config['width']}x#{$config['height']}"
    $main_window.set_default_size(($config['width'] || 600).to_i, ($config['height'] || 400).to_i)
    $main_window.signal_connect('configure-event') {
        msg 3, "configure: pos: #{$main_window.window.root_origin.inspect} size: #{$main_window.window.size.inspect}"
        x, y = $main_window.window.root_origin
        width, height = $main_window.window.size
        $config['pos-x'] = x
        $config['pos-y'] = y
        $config['width'] = width
        $config['height'] = height
        false
    }

    $protect_gtk_pending_calls = Mutex.new
    $gtk_pending_calls = []
    Gtk.timeout_add(100) {
        $protect_gtk_pending_calls.synchronize {
            $gtk_pending_calls.each { |c| c.call }
            $gtk_pending_calls = []
        }
        true
    }

    $statusbar.push(0, utf8(_("Ready.")))
    $main_window.show_all
end

Thread.abort_on_exception = true

handle_options
read_config

Gtk.init
create_main_window
check_config

if ARGV[0]
    open_file_user(ARGV[0])
end
Gtk.main

write_config