70 lines
2.3 KiB
C++
70 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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