gtk-demo: Fix revealer demo

This only used by luck before. We are changing a property from the
::notify handler for that property. Now that GtkRevealer is notifying
the property when it stops animations on unmap, we end up in a life
lock situation where we never make it out of the notify queue.

Fix this by not restarting the animation if the widget is unmapped.

diff --git a/demos/gtk-demo/revealer.c b/demos/gtk-demo/revealer.c
index 23092d059a45a79d15785de37132790751f5d859..2cccb7a7ed44ad095f12caf53f48a4980948945c 100644 (file)
--- a/demos/gtk-demo/revealer.c
+++ b/demos/gtk-demo/revealer.c
@@ -12,10 +12,13 @@ static guint timeout = 0;
 static void
 change_direction (GtkRevealer *revealer)
 {
-  gboolean revealed;
+  if (gtk_widget_get_mapped (GTK_WIDGET (revealer)))
+    {
+      gboolean revealed;
 
-  revealed = gtk_revealer_get_child_revealed (revealer);
-  gtk_revealer_set_reveal_child (revealer, !revealed);
+      revealed = gtk_revealer_get_child_revealed (revealer);
+      gtk_revealer_set_reveal_child (revealer, !revealed);
+    }
 }
 
 static gboolean