[gthumb] filterbar: added buttons to view the selections

[Paolo Bacchilega <paobac src gnome org>]

commit 9b73f33992dec44208407a5a33aa2a72b18d1a85
Author: Paolo Bacchilega <paobac src gnome org>
Date:   Sun Jul 14 13:07:56 2013 +0200

    filterbar: added buttons to view the selections
    
    disable the button if the corresponding selection is void

 extensions/selections/callbacks.c |  107 +++++++++++++++++++++++++++++++++++++
 1 files changed, 107 insertions(+), 0 deletions(-)
---
diff --git a/extensions/selections/callbacks.c b/extensions/selections/callbacks.c
index aab8704..0468827 100644
--- a/extensions/selections/callbacks.c
+++ b/extensions/selections/callbacks.c
@@ -30,6 +30,7 @@
 
 
 #define BROWSER_DATA_KEY "selections-browser-data"
+#define N_SELECTIONS 3
 
 
 static const char *fixed_ui_info =
@@ -121,21 +122,117 @@ typedef struct {
        GthBrowser     *browser;
        GtkActionGroup *actions;
        guint           vfs_merge_id;
+       GtkWidget      *selection_buttons[N_SELECTIONS];
+       gulong          folder_changed_id;
 } BrowserData;
 
 
 static void
 browser_data_free (BrowserData *data)
 {
+       g_signal_handler_disconnect (gth_main_get_default_monitor (), data->folder_changed_id);
        g_free (data);
 }
 
 
+static void
+selection_clicked_cb (GtkWidget *button,
+                     gpointer   user_data)
+{
+       BrowserData *data = user_data;
+       int          n_selection = 0;
+
+       for (n_selection = 0; n_selection < N_SELECTIONS; n_selection++)
+               if (button == data->selection_buttons[n_selection])
+                       break;
+
+       g_return_if_fail (n_selection >= 0 && n_selection <= N_SELECTIONS - 1);
+
+       gth_browser_activate_action_show_selection (data->browser, n_selection + 1);
+}
+
+
+static GtkWidget *
+_selection_button_new (int      n_selection,
+                      gpointer user_data)
+{
+       GtkWidget *button;
+       char      *icon_name;
+       char      *tooltip;
+
+       icon_name = g_strdup_printf ("selection%d", n_selection);
+       tooltip = g_strdup_printf (_("Show selection %d"), n_selection);
+
+       button = gtk_button_new ();
+       gtk_container_add (GTK_CONTAINER (button), gtk_image_new_from_icon_name (icon_name, 
GTK_ICON_SIZE_MENU));
+       gtk_button_set_relief (GTK_BUTTON (button), GTK_RELIEF_NONE);
+       gtk_widget_show_all (button);
+       gtk_widget_set_sensitive (button, FALSE);
+       gtk_widget_set_tooltip_text (button, tooltip);
+
+       g_signal_connect (button,
+                         "clicked",
+                         G_CALLBACK (selection_clicked_cb),
+                         user_data);
+
+       g_free (tooltip);
+       g_free (icon_name);
+
+       return button;
+}
+
+
+static GtkWidget *
+create_selection_buttons (BrowserData *data)
+{
+       GtkWidget *box;
+       int        i;
+
+       box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0);
+       gtk_widget_show (box);
+
+       for (i = 0; i < N_SELECTIONS; i++) {
+               data->selection_buttons[i] = _selection_button_new (i + 1, data);
+               gtk_box_pack_start (GTK_BOX (box), data->selection_buttons[i], FALSE, FALSE, 0);
+       }
+
+       return box;
+}
+
+
+static void
+folder_changed_cb (GthMonitor      *monitor,
+                  GFile           *parent,
+                  GList           *list /* GFile list */,
+                  int              position,
+                  GthMonitorEvent  event,
+                  gpointer         user_data)
+{
+       BrowserData *data = user_data;
+       int          n_selection;
+
+       if (event == GTH_MONITOR_EVENT_CHANGED)
+               return;
+
+       if (! g_file_has_uri_scheme (parent, "selection"))
+               return;
+
+       n_selection = _g_file_get_n_selection (parent);
+       if (n_selection <= 0)
+               return;
+
+       gtk_widget_set_sensitive (data->selection_buttons[n_selection - 1], ! 
gth_selections_manager_get_is_empty (n_selection));
+}
+
+
 void
 selections__gth_browser_construct_cb (GthBrowser *browser)
 {
        BrowserData *data;
        GError      *error = NULL;
+       GtkWidget   *filter_bar;
+       GtkWidget   *filter_bar_extra_area;
+       GtkWidget   *selection_buttons;
 
        g_return_if_fail (GTH_IS_BROWSER (browser));
 
@@ -156,6 +253,16 @@ selections__gth_browser_construct_cb (GthBrowser *browser)
                g_message ("building menus failed: %s", error->message);
                g_error_free (error);
        }
+
+       filter_bar = gth_browser_get_filterbar (browser);
+       filter_bar_extra_area = gth_filterbar_get_extra_area (GTH_FILTERBAR (filter_bar));
+       selection_buttons = create_selection_buttons (data);
+       gtk_box_pack_start (GTK_BOX (filter_bar_extra_area), selection_buttons, FALSE, FALSE, 0);
+
+       data->folder_changed_id = g_signal_connect (gth_main_get_default_monitor (),
+                                                   "folder-changed",
+                                                   G_CALLBACK (folder_changed_cb),
+                                                   data);
 }