Saving a GdkWindow to a file

["Leandro A. F. Pereira" <leandro linuxmag com br>]

Greetings,

In my application I have to save the contents of a widget to a PNG
file. So far it works (using GDK Pixbuf and gdk_pixbuf_save), but
garbage appears if the window is obscured by another window, or if
some part of it is hidden.

How can someone get a GtkWidget's GdkWindow in a way no garbage will
show up if that window isn't completely visible? I know that GTK+ is
double-buffered, so it must be some way.

By the way, the code I am currently using is available at [1]. See
tree_view_save_image().

[1] http://svn.berlios.de/wsvn/hardinfo/trunk/hardinfo2/util.c?op=file&rev=0&sc=0

Thanks in advance,

--
 Leandro A. F. Pereira <leandro tia mat br>
 Developer, Tiamat Software Wizardry.