Re: Bitmap outside a window

["Timothy M. Shead" <tshead k-3d com>]

Martin Bailey wrote:
> Hi,
>
> Sorry for asking such a basic question; I'm simply unable to unable to 
> find my answer in the documentation and this is my first attempt at gtkmm.
>
> I'd like draw a Bitmap outside a Window. That is, I would like to draw 
> an irregular black shape (from a bitmap matrix) directly in the display, 
> over any other programs.
> I don't want to draw inside a Window because I don't want my application 
> to receive any events; just draw over other applications, or in a way 
> hide some parts of them with a binary bitmap.
>
> So as I understand, I must create a Bitmap in the same way that I create 
> a Window, and then create a GC to draw inside my bitmap.
> Is that right?
> What C++ code do I need to get these elements created properly?

Suggest you look at K-3D CVS:

	http://cvs.sourceforge.net/viewcvs.py/k3d/k3d/ngui/

and check out the following:

	screen_overlay.h
	screen_overlay.cpp

It's ugly-but-workable.

Cheers,
Tim