On Wed, 3 Mar 2004, wjd wrote:
> Hi All,
>
> I wrote a X11 application to get image of some window by XGetImage(),but after
> i switch to other terminal by Ctrl+Alt+F2,my application can't get correct image of
> windows.Are there any idea to fix this problem? or how can X11 application to know
> if desktop has been switch to another terminal? Thanks!
>
There is no image when you are switched away. I'm not sure
about how to figure out how to tell when switched away. I thought
there was something in the XFree86-VidModeExtension, but it
looks like there isn't. Certainly, you could monitor the visibility
events on the window you are grabbing. If it's fully obscured, there's
nothing to see.
MArk.
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