163 lines
4 KiB
C++
163 lines
4 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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#include <config.h>
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#include "trackmouse.h"
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#include <kglobal.h>
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#include <kstandarddirs.h>
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#include <math.h>
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#ifdef HAVE_OPENGL
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#include <GL/gl.h>
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#endif
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#include <kdebug.h>
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namespace KWin
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{
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KWIN_EFFECT( TrackMouse, TrackMouseEffect )
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const int STARS = 5;
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const int DIST = 50;
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TrackMouseEffect::TrackMouseEffect()
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: active( false )
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, angle( 0 )
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, texture( NULL )
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{
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}
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TrackMouseEffect::~TrackMouseEffect()
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{
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delete texture;
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}
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void TrackMouseEffect::prePaintScreen( int* mask, QRegion* region, int time )
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{
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if( active )
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angle = ( angle + time / 10 ) % 360;
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effects->prePaintScreen( mask, region, time );
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}
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void TrackMouseEffect::paintScreen( int mask, QRegion region, ScreenPaintData& data )
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{
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effects->paintScreen( mask, region, data ); // paint normal screen
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if( !active )
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return;
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#ifdef HAVE_OPENGL
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if( texture )
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{
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glPushAttrib( GL_CURRENT_BIT | GL_ENABLE_BIT );
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texture->bind();
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glEnable( GL_BLEND );
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glBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA );
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for( int i = 0;
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i < STARS;
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++i )
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{
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QRect r = starRect( i );
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glEnableClientState( GL_VERTEX_ARRAY );
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int verts[ 4 * 2 ] =
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{
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r.x(), r.y(),
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r.x(), r.y() + r.height(),
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r.x() + r.width(), r.y() + r.height(),
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r.x() + r.width(), r.y()
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};
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glVertexPointer( 2, GL_INT, 0, verts );
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glEnableClientState( GL_TEXTURE_COORD_ARRAY );
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int texcoords[ 4 * 2 ] =
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{
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0, 1,
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0, 0,
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1, 0,
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1, 1
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};
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glTexCoordPointer( 2, GL_INT, 0, texcoords );
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glDrawArrays( GL_QUADS, 0, 4 );
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glDisableClientState( GL_TEXTURE_COORD_ARRAY );
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glDisableClientState( GL_VERTEX_ARRAY );
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}
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texture->unbind();
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glPopAttrib();
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}
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#endif
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}
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void TrackMouseEffect::postPaintScreen()
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{
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if( active )
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{
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for( int i = 0;
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i < STARS;
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++i )
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effects->addRepaint( starRect( i ));
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}
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effects->postPaintScreen();
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}
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void TrackMouseEffect::mouseChanged( const QPoint&, const QPoint&, Qt::MouseButtons,
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Qt::KeyboardModifiers modifiers )
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{
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if( modifiers == ( Qt::CTRL | Qt::META ))
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{
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if( !active )
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{
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if( texture == NULL )
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loadTexture();
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if( texture == NULL )
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return;
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active = true;
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angle = 0;
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}
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for( int i = 0;
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i < STARS;
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++i )
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effects->addRepaint( starRect( i ));
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}
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else
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{
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if( active )
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{
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for( int i = 0;
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i < STARS;
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++i )
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effects->addRepaint( starRect( i ));
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active = false;
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}
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}
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}
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QRect TrackMouseEffect::starRect( int num ) const
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{
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int a = angle + 360 / STARS * num;
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int x = cursorPos().x() + int( DIST * cos( a * ( 2 * M_PI / 360 )));
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int y = cursorPos().y() + int( DIST * sin( a * ( 2 * M_PI / 360 )));
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return QRect( QPoint( x - textureSize.width() / 2,
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y - textureSize.height() / 2 ), textureSize );
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}
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void TrackMouseEffect::loadTexture()
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{
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#ifdef HAVE_OPENGL
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QString file = KGlobal::dirs()->findResource( "appdata", "trackmouse.png" );
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if( file.isEmpty())
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return;
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QImage im( file );
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texture = new GLTexture( im );
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textureSize = im.size();
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#endif
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}
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} // namespace
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