workspace/kwin/effects/test/drunken.cpp

   1 /*****************************************************************
   2  KWin - the KDE window manager
   3  This file is part of the KDE project.
   4
   5 Copyright (C) 2007 Lubos Lunak <l.lunak@kde.org>
   6
   7 You can Freely distribute this program under the GNU General Public
   8 License. See the file "COPYING" for the exact licensing terms.
   9 ******************************************************************/
  10
  11 #include "drunken.h"
  12
  13 #include <math.h>
  14
  15 namespace KWin
  16 {
  17
  18 KWIN_EFFECT( drunken, DrunkenEffect )
  19
  20 void DrunkenEffect::prePaintScreen( ScreenPrePaintData& data, int time )
  21     {
  22     if( !windows.isEmpty())
  23         data.mask |= PAINT_SCREEN_WITH_TRANSFORMED_WINDOWS;
  24     effects->prePaintScreen( data, time );
  25     }
  26
  27 void DrunkenEffect::prePaintWindow( EffectWindow* w, WindowPrePaintData& data, int time )
  28     {
  29     if( windows.contains( w ))
  30         {
  31         windows[ w ] += time / 1000.;
  32         if( windows[ w ] < 1 )
  33             data.setTransformed();
  34         else
  35             windows.remove( w );
  36         }
  37     effects->prePaintWindow( w, data, time );
  38     }
  39
  40 void DrunkenEffect::paintWindow( EffectWindow* w, int mask, QRegion region, WindowPaintData& data )
  41     {
  42     if( !windows.contains( w ))
  43         {
  44         effects->paintWindow( w, mask, region, data );
  45         return;
  46         }
  47     WindowPaintData d1 = data;
  48     // 4 cycles, decreasing amplitude
  49     int diff = int( sin( windows[ w ] * 8 * M_PI ) * ( 1 - windows[ w ] ) * 10 );
  50     d1.xTranslate -= diff;
  51     d1.opacity *= 0.5;
  52     effects->paintWindow( w, mask, region, d1 );
  53     WindowPaintData d2 = data;
  54     d2.xTranslate += diff;
  55     d2.opacity *= 0.5;
  56     effects->paintWindow( w, mask, region, d2 );
  57     }
  58
  59 void DrunkenEffect::postPaintWindow( EffectWindow* w )
  60     {
  61     if( windows.contains( w ))
  62         w->addRepaintFull();
  63     effects->postPaintWindow( w );
  64     }
  65
  66 void DrunkenEffect::windowAdded( EffectWindow* w )
  67     {
  68     windows[ w ] = 0;
  69     w->addRepaintFull();
  70     }
  71
  72 void DrunkenEffect::windowClosed( EffectWindow* w )
  73     {
  74     windows.remove( w );
  75     }
  76
  77 } // namespace