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69 lines
2.2 KiB
69 lines
2.2 KiB
/***************************************************************** |
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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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