workspace/kwin/effects/test/flame.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 "flame.h"
  12
  13 #include <assert.h>
  14 #include <kdebug.h>
  15
  16 namespace KWin
  17 {
  18
  19 KWIN_EFFECT( flame, FlameEffect )
  20
  21 void FlameEffect::prePaintScreen( ScreenPrePaintData& data, int time )
  22     {
  23     if( !windows.isEmpty())
  24         data.mask |= PAINT_SCREEN_WITH_TRANSFORMED_WINDOWS;
  25     effects->prePaintScreen(data, time);
  26     }
  27
  28 void FlameEffect::prePaintWindow( EffectWindow* w, WindowPrePaintData& data, int time )
  29     {
  30     if( windows.contains( w ))
  31         {
  32         if( windows[ w ] < 1 )
  33             {
  34             windows[ w ] += time / 500.;
  35             data.setTransformed();
  36             w->enablePainting( EffectWindow::PAINT_DISABLED_BY_DELETE );
  37             data.quads = data.quads.splitAtY( windows[ w ] * w->height());
  38             }
  39         else
  40             {
  41             windows.remove( w );
  42             w->unrefWindow();
  43             }
  44         }
  45     effects->prePaintWindow( w, data, time );
  46     }
  47
  48 void FlameEffect::paintWindow( EffectWindow* w, int mask, QRegion region, WindowPaintData& data )
  49     {
  50     if( windows.contains( w ))
  51         {
  52         WindowQuadList new_quads;
  53         double ylimit = windows[ w ] * w->height(); // parts above this are already away
  54         foreach( const WindowQuad &quad, data.quads )
  55             {
  56             if( quad.bottom() <= ylimit )
  57                 continue;
  58             new_quads.append( quad );
  59             }
  60         if( new_quads.isEmpty())
  61             return; // nothing to paint
  62         data.quads = new_quads;
  63         }
  64     effects->paintWindow( w, mask, region, data );
  65     }
  66
  67 void FlameEffect::postPaintWindow( EffectWindow* w )
  68     {
  69     if( windows.contains( w ))
  70         effects->addRepaint( w->geometry()); // workspace, since the window under it will need painting too
  71     effects->postPaintScreen();
  72     }
  73
  74 void FlameEffect::windowClosed( EffectWindow* c )
  75     {
  76     windows[ c ] = 0;
  77     c->refWindow();
  78     }
  79
  80 void FlameEffect::windowDeleted( EffectWindow* c )
  81     {
  82     windows.remove( c );
  83     }
  84
  85 } // namespace