diff --git a/gtk/gtkmagnifier.c b/gtk/gtkmagnifier.c index 29905fb584..5d937673d1 100644 --- a/gtk/gtkmagnifier.c +++ b/gtk/gtkmagnifier.c @@ -226,9 +226,12 @@ connect_draw_handler (GtkMagnifier *magnifier) priv = _gtk_magnifier_get_instance_private (magnifier); - if (priv->inspected) - priv->draw_handler = g_signal_connect (priv->inspected, "draw", - G_CALLBACK (draw_handler), magnifier); + if (!priv->draw_handler) + { + if (priv->inspected) + priv->draw_handler = g_signal_connect (priv->inspected, "draw", + G_CALLBACK (draw_handler), magnifier); + } } static void @@ -254,6 +257,22 @@ _gtk_magnifier_destroy (GtkWidget *widget) GTK_WIDGET_CLASS (_gtk_magnifier_parent_class)->destroy (widget); } +static void +gtk_magnifier_map (GtkWidget *widget) +{ + connect_draw_handler (GTK_MAGNIFIER (widget)); + + GTK_WIDGET_CLASS (_gtk_magnifier_parent_class)->map (widget); +} + +static void +gtk_magnifier_unmap (GtkWidget *widget) +{ + GTK_WIDGET_CLASS (_gtk_magnifier_parent_class)->unmap (widget); + + disconnect_draw_handler (GTK_MAGNIFIER (widget)); +} + static void _gtk_magnifier_class_init (GtkMagnifierClass *klass) { @@ -267,6 +286,8 @@ _gtk_magnifier_class_init (GtkMagnifierClass *klass) widget_class->draw = _gtk_magnifier_draw; widget_class->get_preferred_width = gtk_magnifier_get_preferred_width; widget_class->get_preferred_height = gtk_magnifier_get_preferred_height; + widget_class->map = gtk_magnifier_map; + widget_class->unmap = gtk_magnifier_unmap; g_object_class_install_property (object_class, PROP_INSPECTED, @@ -353,7 +374,8 @@ _gtk_magnifier_set_inspected (GtkMagnifier *magnifier, g_object_add_weak_pointer (G_OBJECT (priv->inspected), (gpointer *) &priv->inspected); - connect_draw_handler (magnifier); + if (gtk_widget_get_mapped (GTK_WIDGET (magnifier))) + connect_draw_handler (magnifier); connect_resize_handler (magnifier); g_object_notify (G_OBJECT (magnifier), "inspected");