[gnome-photos] preview-nav-buttons: Add a toolbar with common actions

[Debarshi Ray <debarshir src gnome org>]

commit 72889c70fbff750e153f8f2a57f57b4ac8ac7e7d
Author: Debarshi Ray <debarshir gnome org>
Date:   Fri Aug 9 00:48:46 2013 +0200

    preview-nav-buttons: Add a toolbar with common actions

 src/photos-preview-nav-buttons.c |  103 ++++++++++++++++++++++++++++++++++++++
 1 files changed, 103 insertions(+), 0 deletions(-)
---
diff --git a/src/photos-preview-nav-buttons.c b/src/photos-preview-nav-buttons.c
index e24e8e8..e312c28 100644
--- a/src/photos-preview-nav-buttons.c
+++ b/src/photos-preview-nav-buttons.c
@@ -27,6 +27,7 @@
 
 #include <glib.h>
 #include <glib/gi18n.h>
+#include <libgd/gd.h>
 
 #include "photos-item-manager.h"
 #include "photos-preview-nav-buttons.h"
@@ -37,10 +38,12 @@ struct _PhotosPreviewNavButtonsPrivate
 {
   GtkTreeModel *model;
   GtkTreePath *current_path;
+  GtkWidget *favorite_button;
   GtkWidget *next_widget;
   GtkWidget *overlay;
   GtkWidget *prev_widget;
   GtkWidget *preview_view;
+  GtkWidget *toolbar_widget;
   PhotosBaseManager *item_mngr;
   gboolean hover;
   gboolean visible;
@@ -59,6 +62,23 @@ enum
 G_DEFINE_TYPE_WITH_PRIVATE (PhotosPreviewNavButtons, photos_preview_nav_buttons, G_TYPE_OBJECT);
 
 
+static void photos_preview_nav_buttons_update_favorite (PhotosPreviewNavButtons *self, gboolean favorite);
+
+
+static void
+photos_preview_nav_buttons_active_changed (PhotosPreviewNavButtons *self, GObject *object)
+{
+  PhotosBaseItem *item = PHOTOS_BASE_ITEM (object);
+  gboolean favorite;
+
+  if (object == NULL)
+    return;
+
+  favorite = photos_base_item_is_favorite (item);
+  photos_preview_nav_buttons_update_favorite (self, favorite);
+}
+
+
 static void
 photos_preview_nav_buttons_fade_in_button (PhotosPreviewNavButtons *self, GtkWidget *widget)
 {
@@ -79,6 +99,21 @@ photos_preview_nav_buttons_fade_out_button (PhotosPreviewNavButtons *self, GtkWi
 }
 
 
+static void
+photos_preview_nav_buttons_favorite_clicked (PhotosPreviewNavButtons *self)
+{
+  PhotosPreviewNavButtonsPrivate *priv = self->priv;
+  PhotosBaseItem *item;
+  gboolean favorite;
+
+  item = PHOTOS_BASE_ITEM (photos_base_manager_get_active_object (priv->item_mngr));
+  favorite = photos_base_item_is_favorite (item);
+  photos_base_item_set_favorite (item, !favorite);
+
+  photos_preview_nav_buttons_update_favorite (self, !favorite);
+}
+
+
 static gboolean
 photos_preview_nav_buttons_auto_hide (PhotosPreviewNavButtons *self)
 {
@@ -86,6 +121,7 @@ photos_preview_nav_buttons_auto_hide (PhotosPreviewNavButtons *self)
 
   photos_preview_nav_buttons_fade_out_button (self, priv->prev_widget);
   photos_preview_nav_buttons_fade_out_button (self, priv->next_widget);
+  photos_preview_nav_buttons_fade_out_button (self, priv->toolbar_widget);
   priv->auto_hide_id = 0;
   return G_SOURCE_REMOVE;
 }
@@ -137,6 +173,35 @@ photos_preview_nav_buttons_leave_notify (PhotosPreviewNavButtons *self)
 
 
 static void
+photos_preview_nav_buttons_update_favorite (PhotosPreviewNavButtons *self, gboolean favorite)
+{
+  PhotosPreviewNavButtonsPrivate *priv = self->priv;
+  GtkStyleContext *context;
+  gchar *favorite_label;
+
+  g_signal_handlers_block_by_func (priv->favorite_button, photos_preview_nav_buttons_favorite_clicked, self);
+  gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (priv->favorite_button), favorite);
+  g_signal_handlers_unblock_by_func (priv->favorite_button, photos_preview_nav_buttons_favorite_clicked, 
self);
+
+  context = gtk_widget_get_style_context (priv->favorite_button);
+  if (favorite)
+    {
+      favorite_label = g_strdup (_("Remove from favorites"));
+      gtk_style_context_add_class (context, "documents-favorite");
+    }
+  else
+    {
+      favorite_label = g_strdup (_("Add to favorites"));
+      gtk_style_context_remove_class (context, "documents-favorite");
+    }
+
+  gtk_widget_reset_style (priv->favorite_button);
+  gtk_widget_set_tooltip_text (priv->favorite_button, favorite_label);
+  g_free (favorite_label);
+}
+
+
+static void
 photos_preview_nav_buttons_update_visibility (PhotosPreviewNavButtons *self)
 {
   PhotosPreviewNavButtonsPrivate *priv = self->priv;
@@ -150,9 +215,12 @@ photos_preview_nav_buttons_update_visibility (PhotosPreviewNavButtons *self)
     {
       photos_preview_nav_buttons_fade_out_button (self, priv->prev_widget);
       photos_preview_nav_buttons_fade_out_button (self, priv->next_widget);
+      photos_preview_nav_buttons_fade_out_button (self, priv->toolbar_widget);
       return;
     }
 
+  photos_preview_nav_buttons_fade_in_button (self, priv->toolbar_widget);
+
   tmp = iter;
   if (gtk_tree_model_iter_previous (priv->model, &tmp))
       photos_preview_nav_buttons_fade_in_button (self, priv->prev_widget);
@@ -268,6 +336,7 @@ photos_preview_nav_buttons_constructed (GObject *object)
   GtkStyleContext *context;
   GtkWidget *button;
   GtkWidget *image;
+  GtkWidget *toolbar;
   gboolean is_rtl;
   const gchar *next_icon_name;
   const gchar *prev_icon_name;
@@ -336,6 +405,33 @@ photos_preview_nav_buttons_constructed (GObject *object)
                             G_CALLBACK (photos_preview_nav_buttons_leave_notify),
                             self);
 
+  priv->toolbar_widget = gtk_revealer_new ();
+  gtk_widget_set_halign (priv->toolbar_widget, GTK_ALIGN_FILL);
+  gtk_widget_set_valign (priv->toolbar_widget, GTK_ALIGN_END);
+  gtk_revealer_set_transition_type (GTK_REVEALER (priv->toolbar_widget), 
GTK_REVEALER_TRANSITION_TYPE_CROSSFADE);
+  gtk_overlay_add_overlay (GTK_OVERLAY (priv->overlay), priv->toolbar_widget);
+
+  toolbar = gtk_header_bar_new ();
+  context = gtk_widget_get_style_context (toolbar);
+  gtk_style_context_add_class (context, "osd");
+  gtk_container_add (GTK_CONTAINER (priv->toolbar_widget), toolbar);
+  g_signal_connect_swapped (toolbar,
+                            "enter-notify-event",
+                            G_CALLBACK (photos_preview_nav_buttons_enter_notify),
+                            self);
+  g_signal_connect_swapped (toolbar,
+                            "leave-notify-event",
+                            G_CALLBACK (photos_preview_nav_buttons_leave_notify),
+                            self);
+
+  priv->favorite_button = gd_header_toggle_button_new ();
+  gd_header_button_set_symbolic_icon_name (GD_HEADER_BUTTON (priv->favorite_button), 
"emblem-favorite-symbolic");
+  gtk_header_bar_pack_end (GTK_HEADER_BAR (toolbar), priv->favorite_button);
+  g_signal_connect_swapped (priv->favorite_button,
+                            "clicked",
+                            G_CALLBACK (photos_preview_nav_buttons_favorite_clicked),
+                            self);
+
   g_signal_connect_swapped (priv->overlay,
                             "motion-notify-event",
                             G_CALLBACK (photos_preview_nav_buttons_motion_notify),
@@ -343,6 +439,7 @@ photos_preview_nav_buttons_constructed (GObject *object)
 
   gtk_widget_show_all (priv->prev_widget);
   gtk_widget_show_all (priv->next_widget);
+  gtk_widget_show_all (priv->toolbar_widget);
 }
 
 
@@ -378,6 +475,10 @@ photos_preview_nav_buttons_init (PhotosPreviewNavButtons *self)
   priv = self->priv;
 
   priv->item_mngr = photos_item_manager_new ();
+  g_signal_connect_swapped (priv->item_mngr,
+                            "active-changed",
+                            G_CALLBACK (photos_preview_nav_buttons_active_changed),
+                            self);
 }
 
 
@@ -424,6 +525,7 @@ photos_preview_nav_buttons_hide (PhotosPreviewNavButtons *self)
   priv->visible = FALSE;
   photos_preview_nav_buttons_fade_out_button (self, priv->prev_widget);
   photos_preview_nav_buttons_fade_out_button (self, priv->next_widget);
+  photos_preview_nav_buttons_fade_out_button (self, priv->toolbar_widget);
 }
 
 
@@ -455,4 +557,5 @@ photos_preview_nav_buttons_show (PhotosPreviewNavButtons *self)
   priv->visible = TRUE;
   photos_preview_nav_buttons_fade_in_button (self, priv->prev_widget);
   photos_preview_nav_buttons_fade_in_button (self, priv->next_widget);
+  photos_preview_nav_buttons_fade_in_button (self, priv->toolbar_widget);
 }