theme_manager.cc

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/*
    Copyright (C) 2000-2007 Paul Davis

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    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.

*/

#include <cmath>
#include <iostream>
#include <fstream>
#include <errno.h>

#include "fix_carbon.h"

#include <glib/gstdio.h>

#include <gtkmm/stock.h>
#include <gtkmm/settings.h>

#include "gtkmm2ext/gtk_ui.h"
#include "gtkmm2ext/cell_renderer_color_selector.h"
#include "gtkmm2ext/utils.h"

#include "pbd/file_utils.h"
#include "pbd/compose.h"

#include "ardour/filesystem_paths.h"

#include "canvas/container.h"
#include "canvas/rectangle.h"
#include "canvas/scroll_group.h"
#include "canvas/wave_view.h"

#include "ardour_button.h"
#include "ardour_dialog.h"
#include "theme_manager.h"
#include "rgb_macros.h"
#include "ardour_ui.h"
#include "global_signals.h"
#include "utils.h"

#include "i18n.h"

using namespace std;
using namespace Gtk;
using namespace PBD;
using namespace ARDOUR;
using namespace ARDOUR_UI_UTILS;

namespace ARDOUR_UI_UTILS {
        sigc::signal<void> ColorsChanged;
}

ThemeManager::ThemeManager()
        : dark_button (_("Dark Theme"))
        , light_button (_("Light Theme"))
        , reset_button (_("Restore Defaults"))
        , flat_buttons (_("Draw \"flat\" buttons"))
        , blink_rec_button (_("Blink Rec-Arm buttons"))
        , region_color_button (_("Color regions using their track's color"))
        , show_clipping_button (_("Show waveform clipping"))
        , waveform_gradient_depth (0, 1.0, 0.05)
        , waveform_gradient_depth_label (_("Waveforms color gradient depth"))
        , timeline_item_gradient_depth (0, 1.0, 0.05)
        , timeline_item_gradient_depth_label (_("Timeline item gradient depth"))
        , all_dialogs (_("All floating windows are dialogs"))
        , transients_follow_front (_("Transient windows follow front window."))
        , icon_set_label (_("Icon Set"))
        , palette_viewport (*palette_scroller.get_hadjustment(), *palette_scroller.get_vadjustment())
        , palette_group (0)
        , palette_window (0)
{
        /* Now the alias list */
        
        alias_list = TreeStore::create (alias_columns);
        alias_display.set_model (alias_list);
        alias_display.append_column (_("Object"), alias_columns.name);
        
        Gtkmm2ext::CellRendererColorSelector* color_renderer = manage (new Gtkmm2ext::CellRendererColorSelector);
        TreeViewColumn* color_column = manage (new TreeViewColumn (_("Color"), *color_renderer));
        color_column->add_attribute (color_renderer->property_color(), alias_columns.color);
        alias_display.append_column (*color_column);
        
        alias_display.get_column (0)->set_data (X_("colnum"), GUINT_TO_POINTER(0));
        alias_display.get_column (0)->set_expand (true);
        alias_display.get_column (1)->set_data (X_("colnum"), GUINT_TO_POINTER(1));
        alias_display.get_column (1)->set_expand (false);
        alias_display.set_reorderable (false);
        alias_display.get_selection()->set_mode (SELECTION_NONE);
        alias_display.set_headers_visible (true);

        alias_display.signal_button_press_event().connect (sigc::mem_fun (*this, &ThemeManager::alias_button_press_event), false);

        alias_scroller.add (alias_display);

        /* various buttons */
        
        RadioButton::Group group = dark_button.get_group();
        light_button.set_group(group);
        theme_selection_hbox.set_homogeneous(false);
        theme_selection_hbox.pack_start (dark_button);
        theme_selection_hbox.pack_start (light_button);

        set_homogeneous (false);
#if 0 // disable light/dark theme choice. until the 'light theme gets some attention.
        pack_start (theme_selection_hbox, PACK_SHRINK);
#endif
        pack_start (reset_button, PACK_SHRINK);
#ifndef __APPLE__
        pack_start (all_dialogs, PACK_SHRINK);
        pack_start (transients_follow_front, PACK_SHRINK);
#endif
        pack_start (flat_buttons, PACK_SHRINK);
        pack_start (blink_rec_button, PACK_SHRINK);
        pack_start (region_color_button, PACK_SHRINK);
        pack_start (show_clipping_button, PACK_SHRINK);

        Gtk::HBox* hbox;

        vector<string> icon_sets = ::get_icon_sets ();

        if (icon_sets.size() > 1) {
                Gtkmm2ext::set_popdown_strings (icon_set_dropdown, icon_sets);
                icon_set_dropdown.set_active_text (ARDOUR_UI::config()->get_icon_set());

                hbox = Gtk::manage (new Gtk::HBox());
                hbox->set_spacing (6);
                hbox->pack_start (icon_set_label, false, false);
                hbox->pack_start (icon_set_dropdown, true, true);
                pack_start (*hbox, PACK_SHRINK);
        }

        
        hbox = Gtk::manage (new Gtk::HBox());
        hbox->set_spacing (6);
        hbox->pack_start (waveform_gradient_depth, true, true);
        hbox->pack_start (waveform_gradient_depth_label, false, false);
        pack_start (*hbox, PACK_SHRINK);

        hbox = Gtk::manage (new Gtk::HBox());
        hbox->set_spacing (6);
        hbox->pack_start (timeline_item_gradient_depth, true, true);
        hbox->pack_start (timeline_item_gradient_depth_label, false, false);
        pack_start (*hbox, PACK_SHRINK);

        palette_group = initialize_palette_canvas (*palette_viewport.canvas());
        palette_viewport.signal_size_allocate().connect (sigc::bind (sigc::mem_fun (*this, &ThemeManager::palette_canvas_allocated), palette_group, palette_viewport.canvas(),
                                                                     sigc::mem_fun (*this, &ThemeManager::palette_event)));
        palette_scroller.add (palette_viewport);

        modifier_scroller.add (modifier_vbox);
        
        notebook.append_page (alias_scroller, _("Items"));
        notebook.append_page (palette_scroller, _("Palette"));
        notebook.append_page (modifier_scroller, _("Transparency"));
        
        pack_start (notebook);

        show_all ();

        waveform_gradient_depth.set_update_policy (Gtk::UPDATE_DELAYED);
        timeline_item_gradient_depth.set_update_policy (Gtk::UPDATE_DELAYED);
        
        color_dialog.get_colorsel()->set_has_opacity_control (true);
        color_dialog.get_colorsel()->set_has_palette (true);
        
        set_ui_to_state();

        color_dialog.get_ok_button()->signal_clicked().connect (sigc::bind (sigc::mem_fun (color_dialog, &Gtk::Dialog::response), RESPONSE_ACCEPT));
        color_dialog.get_cancel_button()->signal_clicked().connect (sigc::bind (sigc::mem_fun (color_dialog, &Gtk::Dialog::response), RESPONSE_CANCEL));
        dark_button.signal_toggled().connect (sigc::mem_fun (*this, &ThemeManager::on_dark_theme_button_toggled));
        light_button.signal_toggled().connect (sigc::mem_fun (*this, &ThemeManager::on_light_theme_button_toggled));
        reset_button.signal_clicked().connect (sigc::mem_fun (*this, &ThemeManager::reset_canvas_colors));
        flat_buttons.signal_toggled().connect (sigc::mem_fun (*this, &ThemeManager::on_flat_buttons_toggled));
        blink_rec_button.signal_toggled().connect (sigc::mem_fun (*this, &ThemeManager::on_blink_rec_arm_toggled));
        region_color_button.signal_toggled().connect (sigc::mem_fun (*this, &ThemeManager::on_region_color_toggled));
        show_clipping_button.signal_toggled().connect (sigc::mem_fun (*this, &ThemeManager::on_show_clip_toggled));
        waveform_gradient_depth.signal_value_changed().connect (sigc::mem_fun (*this, &ThemeManager::on_waveform_gradient_depth_change));
        timeline_item_gradient_depth.signal_value_changed().connect (sigc::mem_fun (*this, &ThemeManager::on_timeline_item_gradient_depth_change));
        all_dialogs.signal_toggled().connect (sigc::mem_fun (*this, &ThemeManager::on_all_dialogs_toggled));
        transients_follow_front.signal_toggled().connect (sigc::mem_fun (*this, &ThemeManager::on_transients_follow_front_toggled));
        icon_set_dropdown.signal_changed().connect (sigc::mem_fun (*this, &ThemeManager::on_icon_set_changed));

        Gtkmm2ext::UI::instance()->set_tip (all_dialogs, 
                                            string_compose (_("Mark all floating windows to be type \"Dialog\" rather than using \"Utility\" for some.\n"
                                                              "This may help with some window managers. This requires a restart of %1 to take effect"),
                                                            PROGRAM_NAME));
        Gtkmm2ext::UI::instance()->set_tip (transients_follow_front, 
                                            string_compose (_("Make transient windows follow the front window when toggling between the editor and mixer.\n"
                                                              "This requires a restart of %1 to take effect"), PROGRAM_NAME));

        set_size_request (-1, 400);
        /* no need to call setup_palette() here, it will be done when its size is allocated */
        setup_aliases ();
        setup_modifiers ();
        
        ARDOUR_UI_UTILS::ColorsChanged.connect (sigc::mem_fun (*this, &ThemeManager::colors_changed));
}

ThemeManager::~ThemeManager()
{
}

void
ThemeManager::setup_modifiers ()
{
        UIConfiguration* uic (ARDOUR_UI::config());
        UIConfiguration::Modifiers& modifiers (uic->modifiers);
        Gtk::HBox* mod_hbox;
        Gtk::Label* mod_label;
        Gtk::HScale* mod_scale;
        
        Gtkmm2ext::container_clear (modifier_vbox);

        for (UIConfiguration::Modifiers::const_iterator m = modifiers.begin(); m != modifiers.end(); ++m) {
                mod_hbox = manage (new HBox);

                mod_scale = manage (new HScale (0.0, 1.0, 0.01));
                mod_scale->set_draw_value (false);
                mod_scale->set_value (m->second.a());
                mod_scale->set_update_policy (Gtk::UPDATE_DISCONTINUOUS);
                mod_scale->signal_value_changed().connect (sigc::bind (sigc::mem_fun (*this, &ThemeManager::modifier_edited), mod_scale, m->first));

                mod_label = manage (new Label (m->first));
                mod_label->set_alignment (1.0, 0.5);
                mod_label->set_size_request (150, -1); /* 150 pixels should be enough for anyone */
                
                mod_hbox->pack_start (*mod_label, false, true, 12);
                mod_hbox->pack_start (*mod_scale, true, true);

                modifier_vbox.pack_start (*mod_hbox, false, false);
        }

        modifier_vbox.show_all ();

}

void
ThemeManager::modifier_edited (Gtk::Range* range, string name)
{
        using namespace ArdourCanvas;
        
        double alpha = range->get_value();
        SVAModifier svam (SVAModifier::Assign, -1.0, -1.0, alpha);
        ARDOUR_UI::config()->set_modifier (name, svam);
}

void
ThemeManager::colors_changed ()
{
        setup_palette ();
        setup_aliases ();       
        setup_modifiers ();     
}

int
ThemeManager::save (string /*path*/)
{
        return 0;
}

void
ThemeManager::on_flat_buttons_toggled ()
{
        ARDOUR_UI::config()->set_flat_buttons (flat_buttons.get_active());
        ArdourButton::set_flat_buttons (flat_buttons.get_active());
        /* force a redraw */
        gtk_rc_reset_styles (gtk_settings_get_default());
}

void
ThemeManager::on_blink_rec_arm_toggled ()
{
        ARDOUR_UI::config()->set_blink_rec_arm (blink_rec_button.get_active());
        ARDOUR::Config->ParameterChanged("blink-rec-arm");
}

void
ThemeManager::on_region_color_toggled ()
{
        ARDOUR_UI::config()->set_color_regions_using_track_color (region_color_button.get_active());
}

void
ThemeManager::on_show_clip_toggled ()
{
        ARDOUR_UI::config()->set_show_waveform_clipping (show_clipping_button.get_active());
        // "show-waveform-clipping" was a session config key
        ArdourCanvas::WaveView::set_global_show_waveform_clipping (ARDOUR_UI::config()->get_show_waveform_clipping());
}

void
ThemeManager::on_all_dialogs_toggled ()
{
        ARDOUR_UI::config()->set_all_floating_windows_are_dialogs (all_dialogs.get_active());
}

void
ThemeManager::on_transients_follow_front_toggled ()
{
        ARDOUR_UI::config()->set_transients_follow_front (transients_follow_front.get_active());
}

void
ThemeManager::on_waveform_gradient_depth_change ()
{
        double v = waveform_gradient_depth.get_value();

        ARDOUR_UI::config()->set_waveform_gradient_depth (v);
        ArdourCanvas::WaveView::set_global_gradient_depth (v);
}

void
ThemeManager::on_timeline_item_gradient_depth_change ()
{
        double v = timeline_item_gradient_depth.get_value();

        ARDOUR_UI::config()->set_timeline_item_gradient_depth (v);
}

void
ThemeManager::on_icon_set_changed ()
{
        string new_set = icon_set_dropdown.get_active_text();
        ARDOUR_UI::config()->set_icon_set (new_set);
}

void
ThemeManager::on_dark_theme_button_toggled()
{
        if (!dark_button.get_active()) return;

        UIConfiguration* uic (ARDOUR_UI::config());
        
        uic->set_color_file("dark");
}

void
ThemeManager::on_light_theme_button_toggled()
{
        if (!light_button.get_active()) return;

        UIConfiguration* uic (ARDOUR_UI::config());
        
        uic->set_color_file("light");
}

void
ThemeManager::set_ui_to_state()
{
        /* there is no way these values can change individually
         * by themselves (w/o user-interaction)
         * hence a common combined update function suffices
         */

        if (ARDOUR_UI::config()->get_color_file() == "light") {
                light_button.set_active(true);
        } else {
                dark_button.set_active(true);
        }

        /* there is no need to block signal handlers, here,
         * all elements check if the value has changed and ignore NOOPs 
         */
        all_dialogs.set_active (ARDOUR_UI::config()->get_all_floating_windows_are_dialogs());
        transients_follow_front.set_active (ARDOUR_UI::config()->get_transients_follow_front());
        flat_buttons.set_active (ARDOUR_UI::config()->get_flat_buttons());
        blink_rec_button.set_active (ARDOUR_UI::config()->get_blink_rec_arm());
        region_color_button.set_active (ARDOUR_UI::config()->get_color_regions_using_track_color());
        show_clipping_button.set_active (ARDOUR_UI::config()->get_show_waveform_clipping());
        waveform_gradient_depth.set_value(ARDOUR_UI::config()->get_waveform_gradient_depth());
        timeline_item_gradient_depth.set_value(ARDOUR_UI::config()->get_timeline_item_gradient_depth());
}

void
ThemeManager::reset_canvas_colors()
{
        string cfile;
        string basename;

        basename = "my-";
        basename += ARDOUR_UI::config()->get_color_file();
        basename += ".colors";

        if (find_file (ardour_config_search_path(), basename, cfile)) {
                string backup = cfile + string (X_(".old"));
                g_rename (cfile.c_str(), backup.c_str());
                /* don't really care if it fails */
        }

        ARDOUR_UI::config()->load_defaults();
        ARDOUR_UI::config()->save_state ();
        set_ui_to_state();
}

ArdourCanvas::Container*
ThemeManager::initialize_palette_canvas (ArdourCanvas::Canvas& canvas)
{
        using namespace ArdourCanvas;

        /* hide background */
        canvas.set_background_color (rgba_to_color (0.0, 0.0, 1.0, 0.0));

        /* bi-directional scroll group */
        
        ScrollGroup* scroll_group = new ScrollGroup (canvas.root(), ScrollGroup::ScrollSensitivity (ScrollGroup::ScrollsVertically|ScrollGroup::ScrollsHorizontally));
        canvas.add_scroller (*scroll_group);

        /* new container to hold everything */

        return new ArdourCanvas::Container (scroll_group);
}

void
ThemeManager::palette_canvas_allocated (Gtk::Allocation& alloc, ArdourCanvas::Container* group, ArdourCanvas::Canvas* canvas, sigc::slot<bool,GdkEvent*,std::string> event_handler)
{
        build_palette_canvas (*canvas, *group, event_handler);
}

struct NamedColor {
        string name;
        ArdourCanvas::HSV    color;
        NamedColor (string s, ArdourCanvas::HSV c) : name (s), color (c) {}
};

struct SortByHue {
        bool operator() (NamedColor const & a, NamedColor const & b) {
                using namespace ArdourCanvas;
                const HSV black (0, 0, 0);
                if (a.color.is_gray() || b.color.is_gray()) {
                        return black.distance (a.color) < black.distance (b.color);
                } else {
                        return a.color.h < b.color.h;
                        // const HSV red (rgba_to_color (1.0, 0.0, 0.0, 1.0));
                        // return red.distance (a.color) < red.distance (b.color);
                }
        }
};


void
ThemeManager::build_palette_canvas (ArdourCanvas::Canvas& canvas, ArdourCanvas::Container& group, sigc::slot<bool,GdkEvent*,std::string> event_handler)
{
        using namespace ArdourCanvas;

        /* we want the colors sorted by hue, with their name */

        UIConfiguration::Colors& colors (ARDOUR_UI::config()->colors);
        vector<NamedColor> nc;
        for (UIConfiguration::Colors::const_iterator x = colors.begin(); x != colors.end(); ++x) {
                nc.push_back (NamedColor (x->first, HSV (x->second)));
        }
        SortByHue sorter;
        sort (nc.begin(), nc.end(), sorter);
        
        const uint32_t color_limit = nc.size();
        const double box_size = 20.0;
        const double width = canvas.width();
        const double height = canvas.height();

        uint32_t color_num = 0;

        /* clear existing rects and delete them */
        
        group.clear (true);
        
        for (uint32_t y = 0; y < height - box_size && color_num < color_limit; y += box_size) {
                for (uint32_t x = 0; x < width - box_size && color_num < color_limit; x += box_size) {
                        ArdourCanvas::Rectangle* r = new ArdourCanvas::Rectangle (&group, ArdourCanvas::Rect (x, y, x + box_size, y + box_size));

                        string name = nc[color_num++].name;

                        UIConfiguration::Colors::iterator c = colors.find (name);

                        if (c != colors.end()) {
                                Color color = c->second;
                                r->set_fill_color (color);
                                r->set_outline_color (rgba_to_color (0.0, 0.0, 0.0, 1.0));
                                r->set_tooltip (name);
                                r->Event.connect (sigc::bind (event_handler, name));
                        }
                }
        }
}

void
ThemeManager::palette_size_request (Gtk::Requisition* req)
{
        uint32_t ncolors = ARDOUR_UI::config()->colors.size();
        const int box_size = 20;

        double c = sqrt ((double)ncolors);
        req->width = (int) floor (c * box_size);
        req->height = (int) floor (c * box_size);

        /* add overflow row if necessary */
        
        if (fmod (ncolors, c) != 0.0) {
                req->height += box_size;
        }
}

void
ThemeManager::setup_palette ()
{
        build_palette_canvas (*palette_viewport.canvas(), *palette_group, sigc::mem_fun (*this, &ThemeManager::palette_event));
}

bool
ThemeManager::palette_event (GdkEvent* ev, string name)
{
        switch (ev->type) {
        case GDK_BUTTON_RELEASE:
                edit_palette_color (name);
                return true;
        default:
                break;
        }
        return true;
}

void
ThemeManager::edit_palette_color (std::string name)
{
        using namespace ArdourCanvas;
        double r,g, b, a;
        UIConfiguration* uic (ARDOUR_UI::config());
        ArdourCanvas::Color c = uic->color (name);
        Gdk::Color gdkcolor;

        color_to_rgba (c, r, g, b, a);

        gdkcolor.set_rgb_p (r, g, b);
        color_dialog.get_colorsel()->set_previous_color (gdkcolor);
        color_dialog.get_colorsel()->set_current_color (gdkcolor);
        color_dialog.get_colorsel()->set_previous_alpha ((guint16) (a * 65535));
        color_dialog.get_colorsel()->set_current_alpha ((guint16) (a * 65535));

        color_dialog_connection.disconnect ();
        color_dialog_connection = color_dialog.signal_response().connect (sigc::bind (sigc::mem_fun (*this, &ThemeManager::palette_color_response), name));
        color_dialog.present();
}

void
ThemeManager::palette_color_response (int result, std::string name)
{
        using namespace ArdourCanvas;

        color_dialog_connection.disconnect ();
        
        UIConfiguration* uic (ARDOUR_UI::config());
        Gdk::Color gdkcolor;
        double r,g, b, a;

        switch (result) {
        case RESPONSE_ACCEPT:
        case RESPONSE_OK:
                gdkcolor = color_dialog.get_colorsel()->get_current_color();
                a = color_dialog.get_colorsel()->get_current_alpha() / 65535.0;
                r = gdkcolor.get_red_p();
                g = gdkcolor.get_green_p();
                b = gdkcolor.get_blue_p();
                
                uic->set_color (name, rgba_to_color (r, g, b, a));
                break;
                
        default:
                break;
        }

        color_dialog.hide ();
}

bool
ThemeManager::alias_palette_event (GdkEvent* ev, string new_alias, string target_name)
{
        switch (ev->type) {
        case GDK_BUTTON_RELEASE:
                ARDOUR_UI::config()->set_alias (target_name, new_alias);
                return true;
                break;
        default:
                break;
        }
        return false;
}

void
ThemeManager::alias_palette_response (int response, std::string target_name, std::string old_alias)
{
        switch (response) {
        case GTK_RESPONSE_OK:
        case GTK_RESPONSE_ACCEPT:
                /* rebuild alias list with new color: inefficient but simple */
                setup_aliases ();
                break;

        case GTK_RESPONSE_REJECT:
                /* revert choice */
                ARDOUR_UI::config()->set_alias (target_name, old_alias);
                break;

        default:
                /* do nothing */
                break;
        }

        palette_window->hide ();
}

void
ThemeManager::choose_color_from_palette (string const & name)
{
        UIConfiguration* uic (ARDOUR_UI::config());
        UIConfiguration::ColorAliases::iterator i = uic->color_aliases.find (name);

        if (i == uic->color_aliases.end()) {
                return;
        }

        delete palette_window;

        palette_window = new ArdourDialog (_("Color Palette"));
        palette_window->add_button (Stock::CANCEL, RESPONSE_REJECT); /* using CANCEL causes confusion if dialog is closed via CloseAllDialogs */
        palette_window->add_button (Stock::OK, RESPONSE_OK);
        
        ArdourCanvas::GtkCanvas* canvas = new ArdourCanvas::GtkCanvas ();
        ArdourCanvas::Container* group = initialize_palette_canvas (*canvas);
        
        canvas->signal_size_request().connect (sigc::mem_fun (*this, &ThemeManager::palette_size_request));
        canvas->signal_size_allocate().connect (sigc::bind (sigc::mem_fun (*this, &ThemeManager::palette_canvas_allocated), group, canvas,
                                                            sigc::bind (sigc::mem_fun (*this, &ThemeManager::alias_palette_event), name)));
        
        palette_window->get_vbox()->pack_start (*canvas);
        palette_window->show_all ();

        palette_response_connection = palette_window->signal_response().connect (sigc::bind (sigc::mem_fun (*this, &ThemeManager::alias_palette_response), name, i->second));

        palette_window->set_position (WIN_POS_MOUSE);
        palette_window->present ();
}

void
ThemeManager::setup_aliases ()
{
        using namespace ArdourCanvas;
        
        UIConfiguration* uic (ARDOUR_UI::config());
        UIConfiguration::ColorAliases& aliases (uic->color_aliases);

        alias_list->clear ();

        for (UIConfiguration::ColorAliases::iterator i = aliases.begin(); i != aliases.end(); ++i) {
                TreeModel::Children rows = alias_list->children();
                TreeModel::Row row;
                string::size_type colon;

                if ((colon = i->first.find (':')) != string::npos) {

                        /* this is supposed to be a child node, so find the
                         * parent 
                         */

                        string parent = i->first.substr (0, colon);
                        TreeModel::iterator ri;

                        for (ri = rows.begin(); ri != rows.end(); ++ri) {
                                string s = (*ri)[alias_columns.name];
                                if (s == parent) {
                                        break;
                                }
                        }

                        if (ri == rows.end()) {
                                /* not found, add the parent as new top level row */
                                row = *(alias_list->append());
                                row[alias_columns.name] = parent;
                                row[alias_columns.alias] = "";
                                
                                /* now add the child as a child of this one */

                                row = *(alias_list->insert (row->children().end()));
                                row[alias_columns.name] = i->first.substr (colon+1);
                        } else {
                                row = *(alias_list->insert ((*ri)->children().end()));
                                row[alias_columns.name] = i->first.substr (colon+1);
                        }

                } else {
                        /* add as a child */
                        row = *(alias_list->append());
                        row[alias_columns.name] = i->first;
                        row[alias_columns.key] = i->first;
                }

                row[alias_columns.key] = i->first;
                row[alias_columns.alias] = i->second;

                Gdk::Color col;
                double r, g, b, a;
                Color c (uic->color (i->second));
                color_to_rgba (c, r, g, b, a);
                col.set_rgb_p (r, g, b);

                row[alias_columns.color] = col;
        }
}

bool
ThemeManager::alias_button_press_event (GdkEventButton* ev)
{
        TreeIter iter;
        TreeModel::Path path;
        TreeViewColumn* column;
        int cellx;
        int celly;

        if (!alias_display.get_path_at_pos ((int)ev->x, (int)ev->y, path, column, cellx, celly)) {
                return false;
        }

        guint32 colnum = GPOINTER_TO_UINT (column->get_data (X_("colnum")));

        switch (colnum) {
        case 0:
                /* allow normal processing to occur */
                return false;

        case 1: /* color */
                if ((iter = alias_list->get_iter (path))) {
                        string target_color_alias = (*iter)[alias_columns.key];
                        if (!target_color_alias.empty()) {
                                choose_color_from_palette (target_color_alias);
                        }
                }
                break;
        }

        return true;
}