5faa397849
for use in effects (and not only). Now a list of window quads (=window areas) is created at the beginning of the paint pass, prepaint calls can modify the split itself (i.e. divide it into more parts). The actual paint calls can then modify these quads (i.e. transform their geometry). This will allow better control of how the split is done and also allow painting e.g. only the decoration differently. Still work in progress, but it works. Also pass data to prepaint functions in a struct, as there is already quite a number of them. svn path=/trunk/KDE/kdebase/workspace/; revision=684893
69 lines
2.3 KiB
C++
69 lines
2.3 KiB
C++
/*****************************************************************
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KWin - the KDE window manager
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This file is part of the KDE project.
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Copyright (C) 2006 Lubos Lunak <l.lunak@kde.org>
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You can Freely distribute this program under the GNU General Public
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License. See the file "COPYING" for the exact licensing terms.
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******************************************************************/
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/*
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Files howto.cpp and howto.h implement HowtoEffect, a commented demo compositing
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effect that fades out and again in a window after it has been activated.
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*/
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#ifndef KWIN_HOWTO_H
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#define KWIN_HOWTO_H
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// Include with base class for effects.
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#include <kwineffects.h>
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// Everything in KWin is in a namespace. There's no need to prefix names
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// with KWin or K, there's no (big) need to care about symbol clashes.
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namespace KWin
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{
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// The class implementing the effect.
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class HowtoEffect
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// Inherit from the base class for effects.
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: public Effect
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{
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public:
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// There are two kinds of functions in an effect:
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// Functions related to painting: These allow the effect to affect painting.
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// A pre-paint function. It tells the compositing code how the painting will
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// be affected by this effect.
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virtual void prePaintWindow( EffectWindow* w, WindowPrePaintData& data, int time );
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// A paint function. It actually performs the modifications to the painting.
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virtual void paintWindow( EffectWindow* w, int mask, QRegion region, WindowPaintData& data );
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// A post-paint function. It can be used for cleanups after painting, but with animations
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// it is also used to trigger repaints during the next painting pass by manually "damaging"
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// areas of the window.
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virtual void postPaintWindow( EffectWindow* w );
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// Notification functions: These inform the effect about changes such as a new window
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// being activated.
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// The given window has been closed.
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virtual void windowClosed( EffectWindow* c );
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// The given window has been activated.
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virtual void windowActivated( EffectWindow* c );
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private:
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// The window that will be faded out and in again.
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EffectWindow* fade_window;
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// The progress of the fading.
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int progress;
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};
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} // namespace
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#endif
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