Re: gtk_widget_area - expose_event - problem

[Olexiy Avramchenko <olexiy irtech cn ua>]

francex tiscali it wrote:

> Hi,
>
> I got from GDB this error for my application:
>
> Program received signal SIGSEGV, Segmentation fault.
> 0x0804b349 in expose_event (widget=0x80ac738, event=0x0, g=0x0)
>    at graph_edit.c:248
> 248       gdk_draw_drawable (widget->window,
> (gdb)
>  
<...>

> static gint expose_event (GtkWidget *widget, GdkEventExpose *event, typGraphics
> *g)
> {
>  /* --- Copy it right over. --- */
>  gdk_draw_drawable (widget->window,
>          widget->style->fg_gc[GTK_WIDGET_STATE (widget)],
>          g->pixmap,
>          event->area.x, event->area.y,
>          event->area.x, event->area.y,
>          event->area.width, event->area.height);
>  return FALSE;
> }
>
> Maybe problem is for 'typGraphics *g' in expose_Event(..) but for generic
> 'gpointer g' I have not solution...
Yes, it looks like that ('g' or 'g->pixmap' is/are probably the source 
of your problem). From the sample you've posted it's unclear how you 
allocate and fill a 'typGraphics' structures. You have to do this in 
"configure-event" callback.

   Olexiy