Size of a ScrolledWindow's child...

[Axel Schlueter <aschlueter netcologne de>]

Hi,

I'm developing an GTK application, and the biggest problem is the
lack of (good) documentation for GTK. Normally try and error 
helps, but now I ran into a problem where I need some help...

I want to display a large picture into a window, so I created a Window,
put a GtkScrolledWindow into it and set a GtkDrawingArea as a child of
the scrolled window. The picture's size is 32kx32k pixels, so I want
to load only the part of picture which is currently visible. Then 
in respone to the "expose_event" from the GtkDrawingArea I need the 
size and position of the currently visible part of the drawing area to
detect if I have to load a new part of the picture or just redisplay the 
current one.

The Problem: I'm unable to get the coordinates of the currently visible
part of the GdkDrawingWindow ! I suppose I have to get them from 
GtkScrolledWindow, but there are no such calls. The GdkExposeEvent 
contains only the area to redraw, but I need the WHOLE visible area. 
Any ideas where to get it ?

Thanks,
      Axel
-- 
        "In a world without fences, who needs Gates ?"
"Linux is like a wigwam - no windows, no gates, apache inside!"