--- (gtk_draw_point ) assertion `GDK_IS_DRAWABLE (drawable)' failed ? --------

[manu aradhya <manu_aradhya yahoo co in>]

hi all, thanx for ur reply, i found that 
gtk_drawing_area_new();  is returing a drawable, but 
that  " da->window "  is zero.is this the problem. or
usually will it be zero always.?
                  

--- iain <iain prettypeople org> wrote: > On Sat,
2003-09-27 at 14:11, manu aradhya wrote:
> >  da = gtk_drawing_area_new ();
> >  gtk_drawing_area_size (GTK_DRAWING_AREA (da), 60,
> >  60);
> >   gtk_widget_show (da);
> >  gtk_container_add (GTK_CONTAINER (fixed), da);
> >  gdk_draw_point (da->window, da->style->black_gc,
> >  x,
> >  y);
> >  gdk_draw_point (da->window, da->style->black_gc,
> >  x, y);
> >
> > gtk_container_add (GTK_CONTAINER(window),fixed);
> >  gtk_widget_set_size_request (window,500,400);
> >  gtk_widget_show_all (window);
> >  gtk_main ();
> >
> > Ian now also it is failing why?
>
> 2 things:
> a) You need to realize widgets before they can be
> drawn on. Doing a
> gtk_widget_show_all on the toplevel window will do
> it for you, or you
> can force it by calling gtk_widget_realize.
> b) You can only do drawing in the expose_event
> callback otherwise it
> won't show up.
>
> iain
> -- 
> "Miss Celine Dion sings lovesongs while our cities
> burn"
>  

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