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List:       kde-devel
Subject:    Re: KDE & transparency
From:       David Faure <faure () kde ! org>
Date:       2005-11-30 8:51:12
Message-ID: 200511300951.12650.faure () kde ! org
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On Tuesday 22 November 2005 04:01, Bram Biesbrouck wrote:
> Hi all,
> 
> Can someone tell me what's the best approach to using transparency in an 
> application? I'm aware of the existence of transparency patterns, but \
> they  are not really what I'm looking for.  Maybe someone can provide me \
> a link to  some insight regarding this topic?

Transparency relative to other windows (from other processes)? That's Qt-4 \
only (setWindowOpacity).

Transparency relative to other widgets in the same process? Not really \
available,  except if it's only about sharing a common background pixmap.  \
(iirc)

Transparency when painting a given widget or pixmap? Available with QPixmap \
and QPainter, provided that you have the RENDER extension [or that you do \
it by hand with QImage]. The easy way is: create a PNG with transparency, \
load it, paint it. For more info, see my chapter in the Practical Qt book \
:)

-- 
David Faure, faure@kde.org, sponsored by Trolltech to work on KDE,
Konqueror (http://www.konqueror.org), and KOffice (http://www.koffice.org).

 
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