Semi transparent QDialog

[cs_raja]

Hi I want a QDialog which shows the contents of its parent a main window.
Itried setOpacity() , setWindowOpacity(), auto backgorund false,
But It didnt work.

Some body help
Im using Qt 4.2.1 and Fedora 5

Thanks

[wysota]

Does your window manager support compositions?

[chaimar]

Hello,

I'm not sure if I understand you correctly. But you could set widget attribute to
WA_NoSystemBackground like this:

dialog->setAttribute(Qt::WA_NoSystemBackground);

In that way you'll see through the dialog and to the main window in the background.

[marcel]

Desktop compositions are supported on X11( extensions need to be enabled ), OS X by default, and Vista only when enabling Aero.

Since you're using Linux, make sure you have enabled the composition in X11.
In xorg.conf add:

Section "Extensions"
    Option "Composite" "Enable"
EndSection

Section "Extensions"
    Option "Composite" "Enable"
EndSection

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Regards