Re: Re:Help replacing GtkDrawingArea with GtkLayout

[Bernhard Schuster <schuster bernhard gmail com>]

On Mon, Mar 3, 2014 at 5:26 PM, Richard Shann <richard rshann plus com> 
wrote:
> On Mon, 2014-03-03 at 16:49 +0100, Stefan Salewski wrote:
> >  On Mon, 2014-03-03 at 15:17 +0000, Richard Shann wrote:
> >  > I have constructed the following minimal example,
> >  
> >  Yes indeed,
> >  
> >  
> > https://developer.gnome.org/gtk3/stable/GtkWidget.html#gtk-widget-set-events
> >  
> >  >This function must be called while a widget is unrealized.
> Thank you for giving this some thought. I think it is not the case
> however that the gtk_widget_show_all() call causes the "widget to be
> realized" in gtk-speak, it just sets a flag on the widget to say it
> should be visible (I am guessing).
>
> I think I have just made a breakthrough with my problem however -
> setting the configure-event signal handler on the parent GtkWindow
> widget instead of the GtkLayout window it contains causes it to fire
> off. I have tried this with the scroll-event too and that works. Why
> this should be different from the case where I use a GtkDrawingArea I
> have no idea, but it looks like I am cooking with gas!
Either - I strongly recommend to stick to

   gdk_window_add_events (win, GDK_STRUCTURE_MASK);

which does not have any dependency on widget/window realization. (I 
found myself in that very same pit some time ago).


Best


Bernhard