Re: Pb w/ gc, pixmap and darea

[Taura Milana <learfox furry ao net>]

On 2001.12.12 05:12 Pierre-François Gomez wrote:
> Hello,
>
> I'm learning gtk/gdk and i'd like to use a drawing area to draw some
> lines, with a keyboard-driven interface.
>
> Here's a part of my code :
>   [...]
>   darea = gtk_drawing_area_new ();
>   gtk_drawing_area_size (GTK_DRAWING_AREA(darea), 800, 600);
>   gtk_box_pack_start (GTK_BOX(box), darea, FALSE, FALSE, 0);
>   gtk_widget_show (darea);
>
>   darea_xpm = gdk_pixmap_new (darea->window, 800, 600, -1);
>   darea_gc = gdk_gc_new (darea->window);
>   [..]

You need a gtk_widget_realize() call on the drawing area
just after you pack it:

gtk_box_pack_start (GTK_BOX(box), darea, FALSE, FALSE, 0);
gtk_widget_realize(darea);
gtk_widget_show (darea);


Now you might want to use the GDK RGB buffers if you plan to
do intensive live drawing.


--
Sincerely,                  ,"-_                         \|/
-Capt. Taura M.             ,   O=__                    --X--
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