scalebutton: Set GDK_SCROLL_MASK explicitly

selecting for button press/release doesn't suffice anymore to
get scroll events.

diff --git a/gtk/gtkscalebutton.c b/gtk/gtkscalebutton.c
index fa6c57f44547586703f431285388bf4df84614f4..b91c6792cb0d607120e6a0a2482ca3d3c4a9fec9 100644 (file)
--- a/gtk/gtkscalebutton.c
+++ b/gtk/gtkscalebutton.c
@@ -415,6 +415,8 @@ gtk_scale_button_init (GtkScaleButton *button)
   /* the scale */
   priv->scale = gtk_scale_button_scale_new (button);
   gtk_container_add (GTK_CONTAINER (priv->box), priv->scale);
+
+  gtk_widget_add_events (GTK_WIDGET (button), GDK_SCROLL_MASK);
 }
 
 static GObject *