[evince] [shell] Update layers sidebar page when layers have changed

[Carlos Garcia Campos <carlosgc src gnome org>]

commit b151de0dab3a7c3355f8206b8f95548d11714e9e
Author: Carlos Garcia Campos <carlosgc gnome org>
Date:   Wed Sep 15 16:59:49 2010 +0200

    [shell] Update layers sidebar page when layers have changed

 shell/ev-sidebar-layers.c |   43 +++++++++++++++++++++++++++++++++++++++++++
 shell/ev-sidebar-layers.h |    5 +++--
 shell/ev-window.c         |   10 ++++++++++
 3 files changed, 56 insertions(+), 2 deletions(-)
---
diff --git a/shell/ev-sidebar-layers.c b/shell/ev-sidebar-layers.c
index 938f457..794d31f 100644
--- a/shell/ev-sidebar-layers.c
+++ b/shell/ev-sidebar-layers.c
@@ -332,6 +332,49 @@ ev_sidebar_layers_new (void)
 }
 
 static void
+update_layers_state (GtkTreeModel     *model,
+		     GtkTreeIter      *iter,
+		     EvDocumentLayers *document_layers)
+{
+	EvLayer    *layer;
+	gboolean    visible;
+	GtkTreeIter child_iter;
+
+	do {
+		gtk_tree_model_get (model, iter,
+				    EV_DOCUMENT_LAYERS_COLUMN_VISIBLE, &visible,
+				    EV_DOCUMENT_LAYERS_COLUMN_LAYER, &layer,
+				    -1);
+		if (layer) {
+			gboolean layer_visible;
+
+			layer_visible = ev_document_layers_layer_is_visible (document_layers, layer);
+			if (layer_visible != visible) {
+				gtk_tree_store_set (GTK_TREE_STORE (model), iter,
+						    EV_DOCUMENT_LAYERS_COLUMN_VISIBLE, layer_visible,
+						    -1);
+			}
+		}
+
+		if (gtk_tree_model_iter_children (model, &child_iter, iter))
+			update_layers_state (model, &child_iter, document_layers);
+	} while (gtk_tree_model_iter_next (model, iter));
+}
+
+void
+ev_sidebar_layers_update_layers_state (EvSidebarLayers *sidebar_layers)
+{
+	GtkTreeModel     *model;
+	GtkTreeIter       iter;
+	EvDocumentLayers *document_layers;
+
+	document_layers = EV_DOCUMENT_LAYERS (sidebar_layers->priv->document);
+	model = gtk_tree_view_get_model (GTK_TREE_VIEW (sidebar_layers->priv->tree_view));
+	if (gtk_tree_model_get_iter_first (model, &iter))
+		update_layers_state (model, &iter, document_layers);
+}
+
+static void
 job_finished_callback (EvJobLayers     *job,
 		       EvSidebarLayers *sidebar_layers)
 {
diff --git a/shell/ev-sidebar-layers.h b/shell/ev-sidebar-layers.h
index bedd95e..0dd99df 100644
--- a/shell/ev-sidebar-layers.h
+++ b/shell/ev-sidebar-layers.h
@@ -50,8 +50,9 @@ struct _EvSidebarLayersClass {
 	void (* layers_visibility_changed) (EvSidebarLayers *ev_layers);
 };
 
-GType      ev_sidebar_layers_get_type (void) G_GNUC_CONST;
-GtkWidget *ev_sidebar_layers_new      (void);
+GType      ev_sidebar_layers_get_type            (void) G_GNUC_CONST;
+GtkWidget *ev_sidebar_layers_new                 (void);
+void       ev_sidebar_layers_update_layers_state (EvSidebarLayers *sidebar_layers);
 
 G_END_DECLS
 
diff --git a/shell/ev-window.c b/shell/ev-window.c
index ce43ab0..9aa3926 100644
--- a/shell/ev-window.c
+++ b/shell/ev-window.c
@@ -896,6 +896,13 @@ view_selection_changed_cb (EvView   *view,
 }
 
 static void
+view_layers_changed_cb (EvView   *view,
+			EvWindow *window)
+{
+	ev_sidebar_layers_update_layers_state (EV_SIDEBAR_LAYERS (window->priv->sidebar_layers));
+}
+
+static void
 ev_window_page_changed_cb (EvWindow        *ev_window,
 			   gint             old_page,
 			   gint             new_page,
@@ -7007,6 +7014,9 @@ ev_window_init (EvWindow *ev_window)
 	g_signal_connect_object (ev_window->priv->view, "annot-added",
 				 G_CALLBACK (view_annot_added),
 				 ev_window, 0);
+	g_signal_connect_object (ev_window->priv->view, "layers-changed",
+				 G_CALLBACK (view_layers_changed_cb),
+				 ev_window, 0);
 #ifdef ENABLE_DBUS
 	g_signal_connect_swapped (ev_window->priv->view, "sync-source",
 				  G_CALLBACK (ev_window_sync_source),