[gthumb] slideshow: allow to customize the keyboard shortcuts

From: Paolo Bacchilega <paobac src gnome org>
To: commits-list gnome org
Cc:
Subject: [gthumb] slideshow: allow to customize the keyboard shortcuts
Date: Sun, 24 Nov 2019 12:34:08 +0000 (UTC)
commit 701a9f866d0c95b2f7d0a56a004472a2d24b78a0
Author: Paolo Bacchilega <paobac src gnome org>
Date:   Sun Nov 17 10:00:51 2019 +0100

    slideshow: allow to customize the keyboard shortcuts

 extensions/slideshow/actions.c       |  37 ++++++
 extensions/slideshow/actions.h       |   4 +
 extensions/slideshow/callbacks.c     |   7 +-
 extensions/slideshow/gth-slideshow.c | 241 ++++++++++++++++++-----------------
 extensions/slideshow/gth-slideshow.h |  10 +-
 extensions/slideshow/main.c          |   7 +
 extensions/slideshow/shortcuts.h     |  27 ++++
 gthumb/gth-main-default-types.c      |   1 -
 gthumb/gth-shortcut.h                |   1 -
 gthumb/gth-shortcuts-window.c        |   2 +-
 gthumb/gth-window.c                  |  22 +++-
 gthumb/gth-window.h                  |   3 +
 12 files changed, 235 insertions(+), 127 deletions(-)
---
diff --git a/extensions/slideshow/actions.c b/extensions/slideshow/actions.c
index c94b9b5b..d3c9f109 100644
--- a/extensions/slideshow/actions.c
+++ b/extensions/slideshow/actions.c
@@ -148,3 +148,40 @@ gth_browser_activate_slideshow (GSimpleAction *action,
        _g_object_list_unref (file_list);
        _gtk_tree_path_list_free (items);
 }
+
+
+void
+gth_slideshow_activate_close (GSimpleAction *action,
+                             GVariant      *parameter,
+                             gpointer       user_data)
+{
+       gth_slideshow_close (GTH_SLIDESHOW (user_data));
+}
+
+
+void
+gth_slideshow_activate_toggle_pause (GSimpleAction *action,
+                                    GVariant      *parameter,
+                                    gpointer       user_data)
+{
+       gth_slideshow_toggle_pause (GTH_SLIDESHOW (user_data));
+}
+
+
+void
+gth_slideshow_activate_next_image (GSimpleAction *action,
+                                  GVariant      *parameter,
+                                  gpointer       user_data)
+{
+       gth_slideshow_load_next_image (GTH_SLIDESHOW (user_data));
+}
+
+
+void
+gth_slideshow_activate_previous_image (GSimpleAction *action,
+                                      GVariant      *parameter,
+                                      gpointer       user_data)
+{
+       gth_slideshow_load_prev_image (GTH_SLIDESHOW (user_data));
+}
+
diff --git a/extensions/slideshow/actions.h b/extensions/slideshow/actions.h
index 6e262577..f5684716 100644
--- a/extensions/slideshow/actions.h
+++ b/extensions/slideshow/actions.h
@@ -25,5 +25,9 @@
 #include <gthumb.h>
 
 DEF_ACTION_CALLBACK (gth_browser_activate_slideshow)
+DEF_ACTION_CALLBACK (gth_slideshow_activate_close)
+DEF_ACTION_CALLBACK (gth_slideshow_activate_toggle_pause)
+DEF_ACTION_CALLBACK (gth_slideshow_activate_next_image)
+DEF_ACTION_CALLBACK (gth_slideshow_activate_previous_image)
 
 #endif /* ACTIONS_H */
diff --git a/extensions/slideshow/callbacks.c b/extensions/slideshow/callbacks.c
index 6932ed30..801dcd93 100644
--- a/extensions/slideshow/callbacks.c
+++ b/extensions/slideshow/callbacks.c
@@ -28,6 +28,7 @@
 #include "callbacks.h"
 #include "gth-slideshow-preferences.h"
 #include "preferences.h"
+#include "shortcuts.h"
 
 
 static const GActionEntry actions[] = {
@@ -36,7 +37,11 @@ static const GActionEntry actions[] = {
 
 
 static const GthShortcut shortcuts[] = {
-       { "slideshow", N_("Presentation"), GTH_SHORTCUT_CONTEXT_BROWSER_VIEWER, 
GTH_SHORTCUT_CATEGORY_FILE_MANAGER, "F5" },
+       { "slideshow", N_("Start presentation"), GTH_SHORTCUT_CONTEXT_BROWSER_VIEWER, 
GTH_SHORTCUT_CATEGORY_VIEWER, "F5" },
+       { "slideshow-close", N_("Terminate presentation"), GTH_SHORTCUT_CONTEXT_SLIDESHOW, 
GTH_SHORTCUT_CATEGORY_SLIDESHOW, "Escape" },
+       { "slideshow-toggle-pause", N_("Pause/Resume presentation"), GTH_SHORTCUT_CONTEXT_SLIDESHOW, 
GTH_SHORTCUT_CATEGORY_SLIDESHOW, "p" },
+       { "slideshow-next-image", N_("Show next file"), GTH_SHORTCUT_CONTEXT_SLIDESHOW, 
GTH_SHORTCUT_CATEGORY_SLIDESHOW, "space" },
+       { "slideshow-previous-image", N_("Show previous file"), GTH_SHORTCUT_CONTEXT_SLIDESHOW, 
GTH_SHORTCUT_CATEGORY_SLIDESHOW, "b" },
 };
 
 
diff --git a/extensions/slideshow/gth-slideshow.c b/extensions/slideshow/gth-slideshow.c
index 4a9d0e35..b5fd115e 100644
--- a/extensions/slideshow/gth-slideshow.c
+++ b/extensions/slideshow/gth-slideshow.c
@@ -32,6 +32,7 @@
 #endif /* HAVE_GSTREAMER */
 #include "gth-slideshow.h"
 #include "gth-transition.h"
+#include "actions.h"
 
 #define HIDE_CURSOR_DELAY 1
 #define HIDE_PAUSED_SIGN_DELAY 1
@@ -90,33 +91,16 @@ struct _GthSlideshowPrivate {
 
 G_DEFINE_TYPE_WITH_CODE (GthSlideshow,
                         gth_slideshow,
-                        GTK_TYPE_WINDOW,
+                        GTH_TYPE_WINDOW,
                         G_ADD_PRIVATE (GthSlideshow))
 
 
-static void
-_gth_slideshow_close_cb (gpointer user_data)
-{
-       GthSlideshow *self = user_data;
-       gboolean      close_browser;
-       GthBrowser   *browser;
-
-       browser = self->priv->browser;
-       close_browser = ! gtk_widget_get_visible (GTK_WIDGET (browser));
-       self->priv->projector->show_cursor (self);
-       self->priv->projector->finalize (self);
-       gtk_widget_destroy (GTK_WIDGET (self));
-
-       if (close_browser)
-               gth_window_close (GTH_WINDOW (browser));
-}
-
-
-static void
-_gth_slideshow_close (GthSlideshow *self)
-{
-       call_when_idle (_gth_slideshow_close_cb, self);
-}
+static const GActionEntry actions[] = {
+       { "slideshow-close", gth_slideshow_activate_close },
+       { "slideshow-toggle-pause", gth_slideshow_activate_toggle_pause },
+       { "slideshow-next-image", gth_slideshow_activate_next_image },
+       { "slideshow-previous-image", gth_slideshow_activate_previous_image },
+};
 
 
 static int
@@ -141,9 +125,6 @@ _gth_slideshow_reset_current (GthSlideshow *self)
 }
 
 
-static void _gth_slideshow_load_next_image (GthSlideshow *self);
-
-
 static void
 preloader_load_ready_cb (GObject       *source_object,
                         GAsyncResult   *result,
@@ -167,7 +148,7 @@ preloader_load_ready_cb (GObject    *source_object,
                                               &error))
        {
                g_clear_error (&error);
-               _gth_slideshow_load_next_image (self);
+               gth_slideshow_load_next_image (self);
                return;
        }
 
@@ -175,7 +156,7 @@ preloader_load_ready_cb (GObject    *source_object,
        self->priv->current_pixbuf = gth_image_get_pixbuf (image);
 
        if (self->priv->current_pixbuf == NULL) {
-               _gth_slideshow_load_next_image (self);
+               gth_slideshow_load_next_image (self);
                return;
        }
 
@@ -203,7 +184,7 @@ _gth_slideshow_load_current_image (GthSlideshow *self)
 
        if (self->priv->current == NULL) {
                if (! self->priv->one_loaded || ! self->priv->wrap_around) {
-                       _gth_slideshow_close (self);
+                       gth_slideshow_close (self);
                        return;
                }
                _gth_slideshow_reset_current (self);
@@ -232,34 +213,6 @@ _gth_slideshow_load_current_image (GthSlideshow *self)
 }
 
 
-static void
-_gth_slideshow_load_next_image (GthSlideshow *self)
-{
-       self->priv->projector->load_next_image (self);
-       self->priv->direction = GTH_SLIDESHOW_DIRECTION_FORWARD;
-
-       if (self->priv->paused)
-               return;
-
-       self->priv->current = self->priv->current->next;
-       _gth_slideshow_load_current_image (self);
-}
-
-
-static void
-_gth_slideshow_load_prev_image (GthSlideshow *self)
-{
-       self->priv->projector->load_prev_image (self);
-       self->priv->direction = GTH_SLIDESHOW_DIRECTION_BACKWARD;
-
-       if (self->priv->paused)
-               return;
-
-       self->priv->current = self->priv->current->prev;
-       _gth_slideshow_load_current_image (self);
-}
-
-
 static gboolean
 next_image_cb (gpointer user_data)
 {
@@ -269,7 +222,7 @@ next_image_cb (gpointer user_data)
                g_source_remove (self->priv->next_event);
                self->priv->next_event = 0;
        }
-       _gth_slideshow_load_next_image (self);
+       gth_slideshow_load_next_image (self);
 
        return FALSE;
 }
@@ -352,27 +305,6 @@ hide_cursor_cb (gpointer data)
 }
 
 
-static void
-_gth_slideshow_toggle_pause (GthSlideshow *self)
-{
-       self->priv->paused = ! self->priv->paused;
-       if (self->priv->paused) {
-               self->priv->projector->paused (self);
-#if HAVE_GSTREAMER
-               if (self->priv->playbin != NULL)
-                       gst_element_set_state (self->priv->playbin, GST_STATE_PAUSED);
-#endif
-       }
-       else { /* resume */
-               _gth_slideshow_load_next_image (self);
-#if HAVE_GSTREAMER
-               if (self->priv->playbin != NULL)
-                       gst_element_set_state (self->priv->playbin, GST_STATE_PLAYING);
-#endif
-       }
-}
-
-
 #if HAVE_GSTREAMER
 
 
@@ -451,41 +383,10 @@ _gth_slideshow_key_press_cb (GthSlideshow *self,
                             GdkEventKey  *event,
                             gpointer      user_data)
 {
-       gboolean handled = TRUE;
-
-       switch (event->keyval) {
-       case GDK_KEY_F5:
-       case GDK_KEY_Escape:
-       case GDK_KEY_q:
-               _gth_slideshow_close (self);
-               break;
-
-       case GDK_KEY_p:
-               _gth_slideshow_toggle_pause (self);
-               break;
-
-       case GDK_KEY_space:
-       case GDK_KEY_Down:
-       case GDK_KEY_Right:
-       case GDK_KEY_Page_Down:
-               if (self->priv->paused)
-                       _gth_slideshow_toggle_pause (self);
-               else
-                       _gth_slideshow_load_next_image (self);
-               break;
-
-       case GDK_KEY_BackSpace:
-       case GDK_KEY_Up:
-       case GDK_KEY_Left:
-       case GDK_KEY_Page_Up:
-               _gth_slideshow_load_prev_image (self);
-               break;
-
-       default:
-               handled = FALSE;
-       }
-
-       return handled;
+       return gth_window_activate_shortcut (GTH_WINDOW (self),
+                                            GTH_SHORTCUT_CONTEXT_SLIDESHOW,
+                                            event->keyval,
+                                            event->state);
 }
 
 
@@ -537,6 +438,14 @@ _gth_slideshow_construct (GthSlideshow *self,
 
        self->priv->projector->construct (self);
 
+       g_action_map_add_action_entries (G_ACTION_MAP (self),
+                                        actions,
+                                        G_N_ELEMENTS (actions),
+                                        self);
+       gth_window_copy_shortcuts (GTH_WINDOW (self),
+                                  GTH_WINDOW (self->priv->browser),
+                                  GTH_SHORTCUT_CONTEXT_SLIDESHOW);
+
        g_signal_connect (self, "show", G_CALLBACK (gth_slideshow_show_cb), self);
 
        g_signal_connect (self,
@@ -613,6 +522,98 @@ gth_slideshow_set_random_order (GthSlideshow *self,
 }
 
 
+void
+gth_slideshow_toggle_pause (GthSlideshow *self)
+{
+       g_return_if_fail (GTH_IS_SLIDESHOW (self));
+
+       self->priv->paused = ! self->priv->paused;
+       if (self->priv->paused) {
+               self->priv->projector->paused (self);
+#if HAVE_GSTREAMER
+               if (self->priv->playbin != NULL)
+                       gst_element_set_state (self->priv->playbin, GST_STATE_PAUSED);
+#endif
+       }
+       else { /* resume */
+               gth_slideshow_load_next_image (self);
+#if HAVE_GSTREAMER
+               if (self->priv->playbin != NULL)
+                       gst_element_set_state (self->priv->playbin, GST_STATE_PLAYING);
+#endif
+       }
+}
+
+
+void
+gth_slideshow_load_next_image (GthSlideshow *self)
+{
+       g_return_if_fail (GTH_IS_SLIDESHOW (self));
+
+       self->priv->projector->load_next_image (self);
+       self->priv->direction = GTH_SLIDESHOW_DIRECTION_FORWARD;
+
+       if (self->priv->paused)
+               return;
+
+       self->priv->current = self->priv->current->next;
+       _gth_slideshow_load_current_image (self);
+}
+
+
+void
+gth_slideshow_load_prev_image (GthSlideshow *self)
+{
+       g_return_if_fail (GTH_IS_SLIDESHOW (self));
+
+       self->priv->projector->load_prev_image (self);
+       self->priv->direction = GTH_SLIDESHOW_DIRECTION_BACKWARD;
+
+       if (self->priv->paused)
+               return;
+
+       self->priv->current = self->priv->current->prev;
+       _gth_slideshow_load_current_image (self);
+}
+
+
+void
+gth_slideshow_next_image_or_resume (GthSlideshow *self)
+{
+       g_return_if_fail (GTH_IS_SLIDESHOW (self));
+
+       if (self->priv->paused)
+               gth_slideshow_toggle_pause (self);
+       else
+               gth_slideshow_load_next_image (self);
+}
+
+
+static void
+_gth_slideshow_close_cb (gpointer user_data)
+{
+       GthSlideshow *self = user_data;
+       gboolean      close_browser;
+       GthBrowser   *browser;
+
+       browser = self->priv->browser;
+       close_browser = ! gtk_widget_get_visible (GTK_WIDGET (browser));
+       self->priv->projector->show_cursor (self);
+       self->priv->projector->finalize (self);
+       gtk_widget_destroy (GTK_WIDGET (self));
+
+       if (close_browser)
+               gth_window_close (GTH_WINDOW (browser));
+}
+
+
+void
+gth_slideshow_close (GthSlideshow *self)
+{
+       call_when_idle (_gth_slideshow_close_cb, self);
+}
+
+
 /* -- default projector -- */
 
 
@@ -689,10 +690,10 @@ viewer_event_cb (GtkWidget    *widget,
        else if (event->type == GDK_BUTTON_PRESS) {
                switch (((GdkEventButton *) event)->button) {
                case 1:
-                       _gth_slideshow_load_next_image (self);
+                       gth_slideshow_load_next_image (self);
                        break;
                case 3:
-                       _gth_slideshow_load_prev_image (self);
+                       gth_slideshow_load_prev_image (self);
                        break;
                default:
                        break;
@@ -757,7 +758,7 @@ default_projector_construct (GthSlideshow *self)
        gth_image_viewer_set_zoom_change (GTH_IMAGE_VIEWER (self->priv->viewer), GTH_ZOOM_CHANGE_FIT_SIZE);
        gth_image_viewer_set_zoom_quality (GTH_IMAGE_VIEWER (self->priv->viewer), GTH_ZOOM_QUALITY_LOW);
        gth_image_viewer_add_painter (GTH_IMAGE_VIEWER (self->priv->viewer), default_projector_pause_painter, 
self);
-       gth_image_viewer_set_transparency_style (GTH_IMAGE_VIEWER (self->priv->viewer), 
GTH_TRANSPARENCY_STYLE_BLACK);
+       gth_image_viewer_set_transparency_style (GTH_IMAGE_VIEWER (self->priv->viewer), 
GTH_TRANSPARENCY_STYLE_CHECKERED);
 
        g_signal_connect (self->priv->viewer, "button-press-event", G_CALLBACK (viewer_event_cb), self);
        g_signal_connect (self->priv->viewer, "motion-notify-event", G_CALLBACK (viewer_event_cb), self);
@@ -1065,10 +1066,10 @@ stage_input_cb (ClutterStage *stage,
 
                switch (clutter_event_get_button (event)) {
                case 1:
-                       _gth_slideshow_load_next_image (self);
+                       gth_slideshow_load_next_image (self);
                        break;
                case 3:
-                       _gth_slideshow_load_prev_image (self);
+                       gth_slideshow_load_prev_image (self);
                        break;
                default:
                        break;
diff --git a/extensions/slideshow/gth-slideshow.h b/extensions/slideshow/gth-slideshow.h
index 637405df..9d1a9050 100644
--- a/extensions/slideshow/gth-slideshow.h
+++ b/extensions/slideshow/gth-slideshow.h
@@ -43,7 +43,7 @@ typedef struct _GthSlideshowPrivate  GthSlideshowPrivate;
 
 struct _GthSlideshow
 {
-       GtkWindow __parent;
+       GthWindow __parent;
 #ifdef HAVE_CLUTTER
        ClutterActor        *stage;
        ClutterActor        *current_image;
@@ -57,7 +57,7 @@ struct _GthSlideshow
 
 struct _GthSlideshowClass
 {
-       GtkWindowClass __parent_class;
+       GthWindowClass __parent_class;
 };
 
 typedef struct {
@@ -93,6 +93,12 @@ void             gth_slideshow_set_playlist     (GthSlideshow   *self,
                                                 char          **files);
 void             gth_slideshow_set_random_order (GthSlideshow   *self,
                                                 gboolean        random);
+void             gth_slideshow_toggle_pause     (GthSlideshow   *self);
+void             gth_slideshow_load_next_image  (GthSlideshow   *self);
+void             gth_slideshow_load_prev_image  (GthSlideshow   *self);
+void             gth_slideshow_next_image_or_resume
+                                               (GthSlideshow   *self);
+void             gth_slideshow_close            (GthSlideshow   *self);
 
 G_END_DECLS
 
diff --git a/extensions/slideshow/main.c b/extensions/slideshow/main.c
index 5110186a..aa0dd877 100644
--- a/extensions/slideshow/main.c
+++ b/extensions/slideshow/main.c
@@ -26,6 +26,7 @@
 #include "callbacks.h"
 #include "gth-transition.h"
 #include "preferences.h"
+#include "shortcuts.h"
 
 
 #ifdef HAVE_CLUTTER
@@ -281,6 +282,11 @@ cube_from_bottom_transition (GthSlideshow *self,
 #endif /* HAVE_CLUTTER */
 
 
+static GthShortcutCategory shortcut_categories[] = {
+       { GTH_SHORTCUT_CATEGORY_SLIDESHOW, N_("Presentation"), 40 },
+};
+
+
 G_MODULE_EXPORT void
 gthumb_extension_activate (void)
 {
@@ -341,6 +347,7 @@ gthumb_extension_activate (void)
                                  NULL);
 #endif /* HAVE_CLUTTER */
 
+       gth_main_register_shortcut_category (shortcut_categories, G_N_ELEMENTS (shortcut_categories));
        gth_hook_add_callback ("slideshow", 10, G_CALLBACK (ss__slideshow_cb), NULL);
        gth_hook_add_callback ("gth-browser-construct", 10, G_CALLBACK (ss__gth_browser_construct_cb), NULL);
        gth_hook_add_callback ("gth-browser-update-sensitivity", 10, G_CALLBACK 
(ss__gth_browser_update_sensitivity_cb), NULL);
diff --git a/extensions/slideshow/shortcuts.h b/extensions/slideshow/shortcuts.h
new file mode 100644
index 00000000..ab6fae19
--- /dev/null
+++ b/extensions/slideshow/shortcuts.h
@@ -0,0 +1,27 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
+
+/*
+ *  GThumb
+ *
+ *  Copyright (C) 2019 Free Software Foundation, Inc.
+ *
+ *  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, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef SLIDESHOW_SHORTCUTS_H
+#define SLIDESHOW_SHORTCUTS_H
+
+#define GTH_SHORTCUT_CATEGORY_SLIDESHOW "slideshow"
+
+#endif /* SLIDESHOW_SHORTCUTS_H */
diff --git a/gthumb/gth-main-default-types.c b/gthumb/gth-main-default-types.c
index 2b03705d..fbccf86f 100644
--- a/gthumb/gth-main-default-types.c
+++ b/gthumb/gth-main-default-types.c
@@ -40,7 +40,6 @@ static GthShortcutCategory shortcut_categories[] = {
        { GTH_SHORTCUT_CATEGORY_NAVIGATION, N_("Navigation"), 15 },
        { GTH_SHORTCUT_CATEGORY_FILE_MANAGER, N_("File Manager"), 10 },
        { GTH_SHORTCUT_CATEGORY_VIEWER, N_("Viewer"), 20 },
-       { GTH_SHORTCUT_CATEGORY_SLIDESHOW, N_("Presentation"), 21 }
 };
 
 
diff --git a/gthumb/gth-shortcut.h b/gthumb/gth-shortcut.h
index 38f2906b..0596c398 100644
--- a/gthumb/gth-shortcut.h
+++ b/gthumb/gth-shortcut.h
@@ -32,7 +32,6 @@ G_BEGIN_DECLS
 #define GTH_SHORTCUT_CATEGORY_NAVIGATION "file-navigation"
 #define GTH_SHORTCUT_CATEGORY_FILE_MANAGER "file-manager"
 #define GTH_SHORTCUT_CATEGORY_VIEWER "file-viewer"
-#define GTH_SHORTCUT_CATEGORY_SLIDESHOW "slideshow"
 
 
 typedef struct {
diff --git a/gthumb/gth-shortcuts-window.c b/gthumb/gth-shortcuts-window.c
index 284f735e..62b5eb88 100644
--- a/gthumb/gth-shortcuts-window.c
+++ b/gthumb/gth-shortcuts-window.c
@@ -38,7 +38,7 @@ typedef struct {
 static ContextInfo contexts[] = {
        { GTH_SHORTCUT_CONTEXT_BROWSER, "browser", N_("Browser") },
        { GTH_SHORTCUT_CONTEXT_VIEWER, "viewer", N_("Viewer") },
-       //{ GTH_SHORTCUT_CONTEXT_SLIDESHOW, "slideshow", N_("Presentation") }
+       { GTH_SHORTCUT_CONTEXT_SLIDESHOW, "slideshow", N_("Presentation") }
 };
 
 
diff --git a/gthumb/gth-window.c b/gthumb/gth-window.c
index b75b855a..1f8e117b 100644
--- a/gthumb/gth-window.c
+++ b/gthumb/gth-window.c
@@ -745,7 +745,7 @@ gth_window_add_accelerators (GthWindow                      *window,
                                                        NULL);
 
                shortcut = gth_shortcut_new (acc->action_name, NULL);
-               shortcut->context = GTH_SHORTCUT_CONTEXT_INTERNAL | GTH_SHORTCUT_CONTEXT_ANY;
+               shortcut->context = GTH_SHORTCUT_CONTEXT_INTERNAL | GTH_SHORTCUT_CONTEXT_BROWSER_VIEWER;
                shortcut->category = GTH_SHORTCUT_CATEGORY_HIDDEN;
                gth_shortcut_set_accelerator (shortcut, acc->accelerator);
                _gth_window_add_shortcut (window, shortcut);
@@ -1062,3 +1062,23 @@ gth_window_can_change_shortcut (GthWindow         *window,
 
        return TRUE;
 }
+
+
+void
+gth_window_copy_shortcuts (GthWindow *to_window,
+                          GthWindow *from_window,
+                          int        context)
+{
+       int i;
+
+       for (i = 0; i < from_window->priv->shortcuts_v->len; i++) {
+               const GthShortcut *shortcut = g_ptr_array_index (from_window->priv->shortcuts_v, i);
+               GthShortcut       *new_shortcut;
+
+               if ((shortcut->context & context) == 0)
+                       continue;
+
+               new_shortcut = gth_shortcut_dup (shortcut);
+               _gth_window_add_shortcut (to_window, new_shortcut);
+       }
+}
diff --git a/gthumb/gth-window.h b/gthumb/gth-window.h
index 89843e1c..66c88f11 100644
--- a/gthumb/gth-window.h
+++ b/gthumb/gth-window.h
@@ -146,6 +146,9 @@ gboolean    gth_window_can_change_shortcut  (GthWindow              *window,
                                                 guint                   keycode,
                                                 GdkModifierType         modifiers,
                                                 GtkWindow              *parent);
+void           gth_window_copy_shortcuts       (GthWindow              *to_window,
+                                                GthWindow              *from_window,
+                                                int                     context);
 
 G_END_DECLS
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