GtkDrawingArea覆盖的GtkButton

Question

I'm trying to place a button over a GtkDrawingArea in C (GUI is generated from a glade file). In Glade I placed both the GtkDrawingArea and the GtkButton into a GtkFixed container. I can click where the button is supposed to be and the buttons "clicked" event handler is successfully called, but the button is hidden behind the GtkDrawingArea. Within the "expose-event" handler for the Drawing Area I have this:

gboolean on_drawArea_expose_event(GtkWidget *widget, GdkEventExpose *expose, gpointer data)
{
   // draw on drawingArea
   gdk_window_restack( button->window, widget->window, TRUE);
   return FALSE;
}

I get the following error:

gdk_window_restack: assertion 'gdk_window_is_toplevel (GDK_WINDOW_OBJECT (sibling)' failed

I tried:

gdk_window_raise( button->window);

As well instead of restack, that didn't throw any errors but it didn't work either.
Any ideas? Thanks in advance,

Answer 1

So I ended up drawing the button manually within the DrawingArea in the same location the GtkButton widget is located.

 {
 // within expose event handler
 // draw desired image onto GdkPixmap
 // code to draw pix map goes here
 // check to see if GtkButton exists
 if( button != NULL ) 
 {
     GdkGC *buttonGC = gdk_gc_new( myPixmap );
     PangoLayout *buttonLayout =          gtk_widget_create_pango_layout( button, "press me");
     gdk_draw_layout( myPixmap, buttonGC, button->allocation.x, button->allocation.y, buttonLayout);
  }

 gdk_draw_drawable ( myparameters, ...);
 // clean up variables
return;
}