Transparent windows, possibilities?

[Yogesh M]

On 9/14/06, Yogesh M <yogeshm02 at gmail.com> wrote:
> Hi
>
> I want to have my Qt4 app's window be partially transparent (i.e. some
> parts have variable transparency), just like Qt does it for widgets
> (using backing-store).
>
> AFAIK Qt4 doesn't provide somethink like this, so I've to do something
> on my own (using X directly). But I've no experience working with Xlib
> and just have a rough idea about how X works.
>
> Do someone has an idea about what should be done?
>
> Somewhere in my mind is this idea: Use composite for a screenshot of
> each window and blend with my window. This, for me, looks like very
> ugly idea (and perhaps would be slow), but I've no idea of how
> composite functions or what it can do or not.
>
>
> Someone has done similar in qtclock
> (http://www.linuxlots.com/~siraj/qtclock.html) to display shadows,
> which stops working as soon as compmgr is turned off. May be, there is
> some loop-hole left in the application, but having no experience with
> composite/xrender, I can't figure it out. (It'll be great if someone
> can look at code, pointed to above. It is really short one.)
>
> Waiting for your help...

I'm perfectly a noob, as far as working with X is concerned, so any
kind of information will be useful...

-- 
Yogesh M
Chandigarh, India