[gtk+] testgtk: Make dialogs example work without static variable

[Benjamin Otte <otte src gnome org>]

commit 4f7a972aacbfc04f231a970c6be8ce86608be57c
Author: Benjamin Otte <otte redhat com>
Date:   Thu Apr 10 16:16:41 2014 +0200

    testgtk: Make dialogs example work without static variable
    
    Makes it a bit more complicated, but meh.

 tests/testgtk.c |   29 +++++++++++++++++++++--------
 1 files changed, 21 insertions(+), 8 deletions(-)
---
diff --git a/tests/testgtk.c b/tests/testgtk.c
index a6232f9..5827bb5 100644
--- a/tests/testgtk.c
+++ b/tests/testgtk.c
@@ -5416,21 +5416,34 @@ static GtkWidget *dialog_window = NULL;
 static void
 label_toggle (GtkWidget *widget)
 {
-  static GtkWidget *label = NULL;
+  GtkWidget *content_area;
+  GList *l, *children;
+
+  content_area = gtk_dialog_get_content_area (GTK_DIALOG (dialog_window));
+  children = gtk_container_get_children (GTK_CONTAINER (content_area));
+
+  for (l = children; l; l = l->next)
+    {
+      if (GTK_IS_LABEL (l->data))
+        {
+          gtk_container_remove (GTK_CONTAINER (content_area), l->data);
+          break;
+        }
+    }
 
-  if (label == NULL)
+  /* no label removed, so add one */
+  if (l == NULL)
     {
+      GtkWidget *label;
+      
       label = gtk_label_new ("Dialog Test");
       g_object_set (label, "margin", 10, NULL);
-      gtk_box_pack_start (GTK_BOX (gtk_dialog_get_content_area (GTK_DIALOG (dialog_window))),
+      gtk_box_pack_start (GTK_BOX (content_area),
                          label, TRUE, TRUE, 0);
       gtk_widget_show (label);
     }
-  else
-    {
-      gtk_widget_destroy (label);
-      label = NULL;
-    }
+  
+  g_list_free (children);
 }
 
 static void