Re: drawing with no realized/visible widget at hand.

["Donna S. Martin" <donna omartin com>]

For Fact 1: You can  retrieve your depth information from the default visual
(gdk_visual_get_system(), and then access the depth field,    ->depth).
  

For Fact 2 , actually you need a drawable to create a GC,
and since a pixmap is a drawable you can use the result of your
gdk_pixmap_new() to create your own GC.  (really!)

Hope that helps.
Donna

----- Original Message ----- 
From: Manuel Estrada <ranty@atdot.org>
To: gtk-app-devel <gtk-app-devel-list@redhat.com>
Sent: Sunday, October 31, 1999 10:37 AM
Subject: drawing with no realized/visible widget at hand.


> 
> I am trying to create a pixmap and draw into it to dump it
> into a "drawing area" when requested, but I have to set things up and
> even draw before the "drawing area" is realized.
> 
> Fact 1: I need to have a gdkwindow or know some color depth.
> Problem 1: A non realized widget has no gdkwindow.
> 
> Fact 2: I need some GdkGC to have colors to draw with.
> Problem 2.1: A non realized widget doesn't seam to have them.
> Problem 2.2: I need a gdkwindow to create a GdkGC (see Problem 1)
> 
> 
> Thanks in advance
> 
> Ranty
> 
> -------------------------------------------------
> Manuel Estrada
> 
> Ranty@atdot.org
> -------------------------------------------------
> 
> 
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