[gnome-documents] utils: add a helper function to set a single click policy for treeview

[Cosimo Cecchi <cosimoc src gnome org>]

commit c7f1a8625c8f32b2c1bc17862baa57d4097f783b
Author: Cosimo Cecchi <cosimoc gnome org>
Date:   Mon Aug 1 17:19:12 2011 +0200

    utils: add a helper function to set a single click policy for treeview
    
    Imported from libeel

 src/lib/gd-utils.c |   51 +++++++++++++++++++++++++++++++++++++++++++++++++++
 src/lib/gd-utils.h |    3 +++
 2 files changed, 54 insertions(+), 0 deletions(-)
---
diff --git a/src/lib/gd-utils.c b/src/lib/gd-utils.c
index 01c66f4..a087186 100644
--- a/src/lib/gd-utils.c
+++ b/src/lib/gd-utils.c
@@ -188,3 +188,54 @@ gd_queue_thumbnail_job_for_file_finish (GAsyncResult *res)
 
   return g_simple_async_result_get_op_res_gboolean (simple);
 }
+
+/* taken from eel/eel-gtk-extensions.c */
+static gboolean 
+tree_view_button_press_callback (GtkWidget *tree_view,
+				 GdkEventButton *event,
+				 gpointer data)
+{
+	GtkTreePath *path;
+	GtkTreeViewColumn *column;
+
+	if (event->button == 1 && event->type == GDK_BUTTON_PRESS) {
+		if (gtk_tree_view_get_path_at_pos (GTK_TREE_VIEW (tree_view),
+						   event->x, event->y,
+						   &path,
+						   &column,
+						   NULL, 
+						   NULL)) {
+			gtk_tree_view_row_activated
+				(GTK_TREE_VIEW (tree_view), path, column);
+		}
+	}
+
+	return FALSE;
+}
+
+void
+gd_gtk_tree_view_set_activate_on_single_click (GtkTreeView *tree_view,
+                                               gboolean should_activate)
+{
+	guint button_press_id;
+
+	button_press_id = GPOINTER_TO_UINT 
+		(g_object_get_data (G_OBJECT (tree_view), 
+				    "gd-tree-view-activate"));
+
+	if (button_press_id && !should_activate) {
+		g_signal_handler_disconnect (tree_view, button_press_id);
+		g_object_set_data (G_OBJECT (tree_view), 
+				   "gd-tree-view-activate", 
+				   NULL);
+	} else if (!button_press_id && should_activate) {
+		button_press_id = g_signal_connect 
+			(tree_view,
+			 "button_press_event",
+			 G_CALLBACK  (tree_view_button_press_callback),
+			 NULL);
+		g_object_set_data (G_OBJECT (tree_view), 
+				   "gd-tree-view-activate", 
+				   GUINT_TO_POINTER (button_press_id));
+	}
+}
diff --git a/src/lib/gd-utils.h b/src/lib/gd-utils.h
index 4080128..976d44c 100644
--- a/src/lib/gd-utils.h
+++ b/src/lib/gd-utils.h
@@ -52,5 +52,8 @@ void gd_queue_thumbnail_job_for_file_async (GFile *file,
 
 gboolean gd_queue_thumbnail_job_for_file_finish (GAsyncResult *res);
 
+void gd_gtk_tree_view_set_activate_on_single_click (GtkTreeView *tree_view,
+                                                    gboolean should_activate);
+
 #endif /* __GD_UTILS_H__ */