5faa397849
for use in effects (and not only). Now a list of window quads (=window areas) is created at the beginning of the paint pass, prepaint calls can modify the split itself (i.e. divide it into more parts). The actual paint calls can then modify these quads (i.e. transform their geometry). This will allow better control of how the split is done and also allow painting e.g. only the decoration differently. Still work in progress, but it works. Also pass data to prepaint functions in a struct, as there is already quite a number of them. svn path=/trunk/KDE/kdebase/workspace/; revision=684893
149 lines
5.5 KiB
C++
149 lines
5.5 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-X11.h> // HAVE_OPENGL
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#include "magnifier.h"
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#include <kaction.h>
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#include <kactioncollection.h>
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#include <kstandardaction.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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namespace KWin
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{
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KWIN_EFFECT( magnifier, MagnifierEffect )
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const int FRAME_WIDTH = 5;
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MagnifierEffect::MagnifierEffect()
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: zoom( 1 )
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, target_zoom( 1 )
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{
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KActionCollection* actionCollection = new KActionCollection( this );
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KAction* a;
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a = static_cast< KAction* >( actionCollection->addAction( KStandardAction::ZoomIn, this, SLOT( zoomIn())));
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a->setGlobalShortcut(KShortcut(Qt::META + Qt::Key_Equal));
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a = static_cast< KAction* >( actionCollection->addAction( KStandardAction::ZoomOut, this, SLOT( zoomOut())));
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a->setGlobalShortcut(KShortcut(Qt::META + Qt::Key_Minus));
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a = static_cast< KAction* >( actionCollection->addAction( KStandardAction::ActualSize, this, SLOT( toggle())));
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a->setGlobalShortcut(KShortcut(Qt::META + Qt::Key_0));
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magnifier_size = QSize( 200, 200 ); // TODO config option
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}
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void MagnifierEffect::prePaintScreen( ScreenPrePaintData& data, int time )
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{
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if( zoom != target_zoom )
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{
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double diff = time / 500.0;
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if( target_zoom > zoom )
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zoom = qMin( zoom * qMax( 1 + diff, 1.2 ), target_zoom );
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else
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zoom = qMax( zoom * qMin( 1 - diff, 0.8 ), target_zoom );
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}
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effects->prePaintScreen( data, time );
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data.paint |= magnifierArea().adjusted( -FRAME_WIDTH, -FRAME_WIDTH, FRAME_WIDTH, FRAME_WIDTH );
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}
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void MagnifierEffect::paintScreen( int mask, QRegion region, ScreenPaintData& data )
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{
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ScreenPaintData data2 = data;
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effects->paintScreen( mask, region, data ); // paint normal screen
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if( zoom != 1.0 )
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{ // paint magnifier
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// ## TODO this should be inside HAVE_OPENGL
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glPushAttrib( GL_ENABLE_BIT );
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QRect area = magnifierArea();
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glEnable( GL_SCISSOR_TEST );
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int dh = displayHeight();
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// Scissor rect has to be given in OpenGL coords
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glScissor( area.x(), dh - area.y() - area.height(), area.width(), area.height());
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mask |= PAINT_SCREEN_TRANSFORMED;
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data2.xScale *= zoom;
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data2.yScale *= zoom;
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QPoint cursor = cursorPos();
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// set the position so that the cursor is in the same position in the scaled view
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data2.xTranslate = - int( cursor.x() * ( zoom - 1 ));
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data2.yTranslate = - int( cursor.y() * ( zoom - 1 ));
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effects->paintScreen( mask, region, data2 );
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glPopAttrib();
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glPushAttrib( GL_CURRENT_BIT );
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glColor4f( 0, 0, 0, 1 ); // black
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glBegin( GL_QUADS );
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glVertex2i( area.left() - FRAME_WIDTH, area.top() - FRAME_WIDTH ); // top frame
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glVertex2i( area.right() + FRAME_WIDTH, area.top() - FRAME_WIDTH );
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glVertex2i( area.right() + FRAME_WIDTH, area.top() - 1 );
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glVertex2i( area.left() - FRAME_WIDTH, area.top() - 1 );
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glVertex2i( area.left() - FRAME_WIDTH, area.top() - FRAME_WIDTH ); // left frame
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glVertex2i( area.left() - 1, area.top() - FRAME_WIDTH );
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glVertex2i( area.left() - 1, area.bottom() + FRAME_WIDTH );
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glVertex2i( area.left() - FRAME_WIDTH, area.bottom() + FRAME_WIDTH );
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glVertex2i( area.right() + 1, area.top() - FRAME_WIDTH ); // right frame
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glVertex2i( area.right() + FRAME_WIDTH, area.top() - FRAME_WIDTH );
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glVertex2i( area.right() + FRAME_WIDTH, area.bottom() + FRAME_WIDTH );
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glVertex2i( area.right() + 1, area.bottom() + FRAME_WIDTH );
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glVertex2i( area.left() - FRAME_WIDTH, area.bottom() + 1 ); // bottom frame
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glVertex2i( area.right() + FRAME_WIDTH, area.bottom() + 1 );
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glVertex2i( area.right() + FRAME_WIDTH, area.bottom() + FRAME_WIDTH );
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glVertex2i( area.left() - FRAME_WIDTH, area.bottom() + FRAME_WIDTH );
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glEnd();
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glPopAttrib();
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}
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}
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void MagnifierEffect::postPaintScreen()
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{
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if( zoom != target_zoom )
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effects->addRepaint( magnifierArea());
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effects->postPaintScreen();
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}
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QRect MagnifierEffect::magnifierArea( QPoint pos ) const
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{
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return QRect( pos.x() - magnifier_size.width() / 2, pos.y() - magnifier_size.height() / 2,
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magnifier_size.width(), magnifier_size.height());
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}
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void MagnifierEffect::zoomIn()
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{
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target_zoom *= 1.2;
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effects->addRepaint( magnifierArea().adjusted( -FRAME_WIDTH, -FRAME_WIDTH, FRAME_WIDTH, FRAME_WIDTH ));
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}
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void MagnifierEffect::zoomOut()
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{
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target_zoom /= 1.2;
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if( target_zoom < 1 )
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target_zoom = 1;
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effects->addRepaint( magnifierArea().adjusted( -FRAME_WIDTH, -FRAME_WIDTH, FRAME_WIDTH, FRAME_WIDTH ));
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}
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void MagnifierEffect::toggle()
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{
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if( target_zoom == 1.0 )
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target_zoom = 2;
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else
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target_zoom = 1;
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effects->addRepaint( magnifierArea().adjusted( -FRAME_WIDTH, -FRAME_WIDTH, FRAME_WIDTH, FRAME_WIDTH ));
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}
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void MagnifierEffect::mouseChanged( const QPoint& pos, const QPoint& old, Qt::MouseButtons, Qt::KeyboardModifiers )
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{
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if( pos != old && zoom != 1 )
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effects->addRepaint( magnifierArea( old ).adjusted( -FRAME_WIDTH, -FRAME_WIDTH, FRAME_WIDTH, FRAME_WIDTH ));
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}
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} // namespace
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#include "magnifier.moc"
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