+
+// ============================================================================
+// implementation
+// ============================================================================
+
+// constants taken from GTK sources
+#define LABEL_PAD 1
+#define LABEL_SIDE_PAD 2
+
+//-----------------------------------------------------------------------------
+// "gtk_frame_size_allocate" signal
+//-----------------------------------------------------------------------------
+
+extern "C" {
+
+static void
+gtk_frame_size_allocate (GtkWidget *widget,
+ GtkAllocation *allocation,
+ wxStaticBox * WXUNUSED(box))
+{
+ GtkFrame *frame = GTK_FRAME (widget);
+
+ // this handler gets called _after_ the GTK+'s own signal handler; thus we
+ // need to fix only the width of the GtkLabel
+ // (everything else has already been handled by the GTK+ signal handler).
+
+ if (frame->label_widget && GTK_WIDGET_VISIBLE (frame->label_widget))
+ {
+ GtkAllocation ca = frame->label_widget->allocation;
+
+ // we want the GtkLabel to not exceed maxWidth:
+ int maxWidth = allocation->width - 2*LABEL_SIDE_PAD - 2*LABEL_PAD;
+ maxWidth = wxMax(2, maxWidth); // maxWidth must always be positive!
+
+ // truncate the label to the GtkFrame width...
+ ca.width = wxMin(ca.width, maxWidth);
+ gtk_widget_size_allocate(frame->label_widget, &ca);
+ }
+}
+
+}
+
+