+ cairo_t *bwcr = gdk_cairo_create (tree_view->priv->bin_window);
+ GdkRectangle Zarea;
+ GtkAllocation allocation;
+ gtk_widget_get_allocation (widget, &allocation);
+
+ Zarea.x = 0;
+ Zarea.y = 0;
+ Zarea.width = gdk_window_get_width (event->window);
+ Zarea.height = allocation.height;
+