514 lines
18 KiB
C++
514 lines
18 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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Copyright (C) 2010 Sebastian Sauer <sebsauer@kdab.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*********************************************************************/
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#include "zoom.h"
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#include <QtCore/QDir>
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#include <QtCore/QFile>
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#include <QtCore/QFileInfo>
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#include <QtGui/QX11Info>
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#include <QtGui/QApplication>
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#include <QtGui/QStyle>
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#include <QtDBus/QDBusConnection>
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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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#include <kwinglutils.h>
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#include <kwinxrenderutils.h>
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#include <X11/extensions/Xfixes.h>
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#include <X11/Xcursor/Xcursor.h>
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namespace KWin
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{
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static int nominalCursorSize(int iconSize)
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{
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for(int i = 512; i > 8; i /= 2)
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{
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if(i < iconSize)
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return i;
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if((i * .75) < iconSize)
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return int(i * .75);
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}
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return 8;
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}
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KWIN_EFFECT( zoom, ZoomEffect )
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ZoomEffect::ZoomEffect()
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: QObject()
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, Effect()
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, zoom( 1 )
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, target_zoom( 1 )
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, polling( false )
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, zoomFactor( 1.25 )
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, mouseTracking( MouseTrackingProportional )
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, enableFocusTracking( false )
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, followFocus( true )
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, mousePointer( MousePointerScale )
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, focusDelay( 350 ) // in milliseconds
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, texture( 0 )
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, xrenderPicture( 0 )
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, imageWidth( 0 )
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, imageHeight( 0 )
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, isMouseHidden( false )
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, xMove( 0 )
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, yMove( 0 )
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, moveFactor( 20.0 )
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{
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KActionCollection* actionCollection = new KActionCollection( this );
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KAction* a = 0;
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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( actualSize())));
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a->setGlobalShortcut(KShortcut(Qt::META + Qt::Key_0));
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a = static_cast< KAction* >( actionCollection->addAction( "MoveZoomLeft" ));
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a->setText( i18n("Move Left") );
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a->setGlobalShortcut(KShortcut(Qt::META + Qt::Key_Left));
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connect( a, SIGNAL( triggered( bool )), this, SLOT( moveZoomLeft() ));
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a = static_cast< KAction* >( actionCollection->addAction( "MoveZoomRight" ));
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a->setText( i18n("Move Right") );
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a->setGlobalShortcut(KShortcut(Qt::META + Qt::Key_Right));
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connect( a, SIGNAL( triggered( bool )), this, SLOT( moveZoomRight() ));
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a = static_cast< KAction* >( actionCollection->addAction( "MoveZoomUp" ));
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a->setText( i18n("Move Up") );
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a->setGlobalShortcut(KShortcut(Qt::META + Qt::Key_Up));
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connect( a, SIGNAL( triggered( bool )), this, SLOT( moveZoomUp() ));
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a = static_cast< KAction* >( actionCollection->addAction( "MoveZoomDown" ));
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a->setText( i18n("Move Down") );
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a->setGlobalShortcut(KShortcut(Qt::META + Qt::Key_Down));
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connect( a, SIGNAL( triggered( bool )), this, SLOT( moveZoomDown() ));
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a = static_cast< KAction* >( actionCollection->addAction( "MoveMouseToFocus" ));
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a->setText( i18n("Move Mouse to Focus") );
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a->setGlobalShortcut(KShortcut(Qt::META + Qt::Key_F5));
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connect( a, SIGNAL( triggered( bool )), this, SLOT( moveMouseToFocus() ));
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a = static_cast< KAction* >( actionCollection->addAction( "MoveMouseToCenter" ));
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a->setText( i18n("Move Mouse to Center") );
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a->setGlobalShortcut(KShortcut(Qt::META + Qt::Key_F6));
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connect( a, SIGNAL( triggered( bool )), this, SLOT( moveMouseToCenter() ));
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timeline.setDuration( 350 );
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timeline.setFrameRange( 0, 100 );
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connect(&timeline, SIGNAL(frameChanged(int)), this, SLOT(timelineFrameChanged(int)));
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reconfigure( ReconfigureAll );
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}
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ZoomEffect::~ZoomEffect()
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{
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// switch off and free resources
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showCursor();
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}
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void ZoomEffect::showCursor()
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{
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#if defined(KWIN_HAVE_OPENGL_COMPOSITING) || defined(KWIN_HAVE_XRENDER_COMPOSITING)
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if( isMouseHidden )
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{
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// show the previously hidden mouse-pointer again and free the loaded texture/picture.
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Display* display = QX11Info::display();
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XFixesShowCursor(display, DefaultRootWindow(display));
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delete texture;
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texture = 0;
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delete xrenderPicture;
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xrenderPicture = 0;
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isMouseHidden = false;
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}
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#endif
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}
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void ZoomEffect::hideCursor()
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{
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#if defined(KWIN_HAVE_OPENGL_COMPOSITING) || defined(KWIN_HAVE_XRENDER_COMPOSITING)
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if( !isMouseHidden )
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{
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// try to load the cursor-theme into a OpenGL texture and if successful then hide the mouse-pointer
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recreateTexture();
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if( texture || xrenderPicture )
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{
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Display* display = QX11Info::display();
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XFixesHideCursor(display, DefaultRootWindow(display));
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isMouseHidden = true;
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}
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}
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#endif
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}
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void ZoomEffect::recreateTexture()
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{
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// read details about the mouse-cursor theme define per default
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KConfigGroup mousecfg(KSharedConfig::openConfig( "kcminputrc" ), "Mouse" );
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QString theme = mousecfg.readEntry("cursorTheme", QString());
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QString size = mousecfg.readEntry("cursorSize", QString());
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// try to find the to the theme-name matching cursor-directory.
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QByteArray themePath;
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foreach (const QString &baseDir, QString(XcursorLibraryPath()).split(':', QString::SkipEmptyParts))
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{
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QDir dir(baseDir);
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if(!dir.exists()) continue;
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if(!theme.isEmpty() && dir.cd(theme))
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{
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themePath = QFile::encodeName(dir.absolutePath());
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break; // theme found, job is done and we can abort the search now
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}
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if(dir.cd("default")) // default is better then nothing, so keep it as backup
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themePath = QFile::encodeName(dir.absolutePath());
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}
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// fetch a reasonable size for the cursor-theme image
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bool ok;
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int iconSize = size.toInt(&ok);
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if(!ok)
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iconSize = QApplication::style()->pixelMetric(QStyle::PM_LargeIconSize);
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// load the cursor-theme image from the Xcursor-library
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XcursorImage *ximg = XcursorLibraryLoadImage("left_ptr", themePath, nominalCursorSize(iconSize));
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if (ximg)
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{
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// turn the XcursorImage into a QImage that will be used to create the GLTexture/XRenderPicture.
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imageWidth = ximg->width;
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imageHeight = ximg->height;
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QImage img((uchar*)ximg->pixels, imageWidth, imageHeight, QImage::Format_ARGB32_Premultiplied);
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#ifdef KWIN_HAVE_OPENGL_COMPOSITING
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if( effects->compositingType() == OpenGLCompositing )
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texture = new GLTexture(img);
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#endif
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#ifdef KWIN_HAVE_XRENDER_COMPOSITING
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if( effects->compositingType() == XRenderCompositing )
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xrenderPicture = new XRenderPicture(QPixmap::fromImage(img));
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#endif
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XcursorImageDestroy(ximg);
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}
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}
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void ZoomEffect::reconfigure( ReconfigureFlags )
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{
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KConfigGroup conf = EffectsHandler::effectConfig("Zoom");
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// On zoom-in and zoom-out change the zoom by the defined zoom-factor.
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zoomFactor = qMax(0.1, conf.readEntry("ZoomFactor", zoomFactor));
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// Visibility of the mouse-pointer.
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mousePointer = MousePointerType(conf.readEntry("MousePointer", int(mousePointer)));
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// Track moving of the mouse.
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mouseTracking = MouseTrackingType(conf.readEntry("MouseTracking", int(mouseTracking)));
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// Enable tracking of the focused location.
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bool _enableFocusTracking = conf.readEntry("EnableFocusTracking", enableFocusTracking);
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if(enableFocusTracking != _enableFocusTracking)
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{
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enableFocusTracking = _enableFocusTracking;
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if(QDBusConnection::sessionBus().isConnected())
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{
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if(enableFocusTracking)
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QDBusConnection::sessionBus().connect("org.kde.kaccessibleapp", "/Adaptor", "org.kde.kaccessibleapp.Adaptor", "focusChanged", this, SLOT(focusChanged(int,int,int,int,int,int)));
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else
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QDBusConnection::sessionBus().disconnect("org.kde.kaccessibleapp", "/Adaptor", "org.kde.kaccessibleapp.Adaptor", "focusChanged", this, SLOT(focusChanged(int,int,int,int,int,int)));
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}
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}
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// When the focus changes, move the zoom area to the focused location.
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followFocus = conf.readEntry("EnableFollowFocus", followFocus);
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// The time in milliseconds to wait before a focus-event takes away a mouse-move.
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focusDelay = qMax(0, conf.readEntry("FocusDelay", focusDelay));
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// The factor the zoom-area will be moved on touching an edge on push-mode or using the navigation KAction's.
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moveFactor = qMax(0.1, conf.readEntry("MoveFactor", moveFactor));
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}
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void ZoomEffect::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 / animationTime( 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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if( zoom == 1.0 )
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{
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showCursor();
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}
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else
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{
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hideCursor();
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data.mask |= PAINT_SCREEN_TRANSFORMED;
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}
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effects->prePaintScreen( data, time );
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}
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void ZoomEffect::paintScreen( int mask, QRegion region, ScreenPaintData& data )
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{
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if( zoom != 1.0 )
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{
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data.xScale *= zoom;
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data.yScale *= zoom;
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// mouse-tracking allows navigation of the zoom-area using the mouse.
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switch( mouseTracking )
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{
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case MouseTrackingProportional:
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data.xTranslate = - int( cursorPoint.x() * ( zoom - 1.0 ) );
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data.yTranslate = - int( cursorPoint.y() * ( zoom - 1.0 ) );
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prevPoint = cursorPoint;
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break;
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case MouseTrackingCentred:
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data.xTranslate = qMin(0, qMax( int(displayWidth() - displayWidth() * zoom), int( displayWidth()/2 - cursorPoint.x() * zoom )));
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data.yTranslate = qMin(0, qMax( int(displayHeight() - displayHeight() * zoom), int( displayHeight()/2 - cursorPoint.y() * zoom )));
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prevPoint = cursorPoint;
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break;
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case MouseTrackingPush:
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if( timeline.state() != QTimeLine::Running )
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{
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// touching an edge of the screen moves the zoom-area in that direction.
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int x = cursorPoint.x() * zoom - prevPoint.x() * ( zoom - 1.0 );
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int y = cursorPoint.y() * zoom - prevPoint.y() * ( zoom - 1.0 );
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int threshold = 1; //qMax(1, int(10.0 / zoom));
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xMove = yMove = 0;
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if( x < threshold )
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xMove = - qMax(1.0, displayWidth() / zoom / moveFactor);
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else if( x + threshold > displayWidth() )
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xMove = qMax(1.0, displayWidth() / zoom / moveFactor);
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if( y < threshold )
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yMove = - qMax(1.0, displayHeight() / zoom / moveFactor);
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else if( y + threshold > displayHeight() )
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yMove = qMax(1.0, displayHeight() / zoom / moveFactor);
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if( xMove != 0 || yMove != 0 )
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{
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prevPoint.setX( qMax(0, qMin(displayWidth(), prevPoint.x() + xMove)) );
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prevPoint.setY( qMax(0, qMin(displayHeight(), prevPoint.y() + yMove)) );
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timeline.start();
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}
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}
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// fall through
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case MouseTrackingDisabled:
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data.xTranslate = - int( prevPoint.x() * ( zoom - 1.0 ) );
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data.yTranslate = - int( prevPoint.y() * ( zoom - 1.0 ) );
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break;
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}
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// use the focusPoint if focus tracking is enabled
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if(enableFocusTracking && followFocus)
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{
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bool acceptFocus = true;
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if(mouseTracking != MouseTrackingDisabled && focusDelay > 0)
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{
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// Wait some time for the mouse before doing the switch. This serves as threshold
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// to prevent the focus from jumping around to much while working with the mouse.
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const int msecs = lastMouseEvent.msecsTo(lastFocusEvent);
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acceptFocus = msecs > focusDelay;
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}
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if(acceptFocus)
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{
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data.xTranslate = - int( focusPoint.x() * ( zoom - 1.0 ) );
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data.yTranslate = - int( focusPoint.y() * ( zoom - 1.0 ) );
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prevPoint = focusPoint;
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}
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}
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}
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effects->paintScreen( mask, region, data );
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if( zoom != 1.0 && mousePointer != MousePointerHide )
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{
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// Draw the mouse-texture at the position matching to zoomed-in image of the desktop. Hiding the
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// previous mouse-cursor and drawing our own fake mouse-cursor is needed to be able to scale the
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// mouse-cursor up and to re-position those mouse-cursor to match to the chosen zoom-level.
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#ifdef KWIN_HAVE_OPENGL_COMPOSITING
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if( texture )
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{
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#ifndef KWIN_HAVE_OPENGLES
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glPushAttrib( GL_CURRENT_BIT | GL_ENABLE_BIT );
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#endif
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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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int w = imageWidth;
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int h = imageHeight;
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if( mousePointer == MousePointerScale )
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{
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w *= zoom;
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h *= zoom;
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}
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QPoint p = QCursor::pos();
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QRect rect(p.x() * zoom + data.xTranslate, p.y() * zoom + data.yTranslate, w, h);
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texture->render(region, rect);
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texture->unbind();
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glDisable(GL_BLEND);
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#ifndef KWIN_HAVE_OPENGLES
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glPopAttrib();
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#endif
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}
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#endif
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#ifdef KWIN_HAVE_XRENDER_COMPOSITING
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if( xrenderPicture )
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{
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QPoint p = QCursor::pos();
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QRect rect(p.x() * zoom + data.xTranslate, p.y() * zoom + data.yTranslate, imageWidth, imageHeight);
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XRenderComposite( display(), PictOpOver, *xrenderPicture, None, effects->xrenderBufferPicture(), 0, 0, 0, 0, rect.x(), rect.y(), rect.width(), rect.height());
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}
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#endif
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}
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}
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void ZoomEffect::postPaintScreen()
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{
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if( zoom != target_zoom )
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effects->addRepaintFull();
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effects->postPaintScreen();
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}
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void ZoomEffect::zoomIn()
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{
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target_zoom *= zoomFactor;
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if( !polling )
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{
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polling = true;
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effects->startMousePolling();
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}
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effects->addRepaintFull();
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}
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void ZoomEffect::zoomOut()
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{
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target_zoom /= zoomFactor;
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if( target_zoom < 1 )
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{
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target_zoom = 1;
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if( polling )
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{
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polling = false;
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effects->stopMousePolling();
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}
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}
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effects->addRepaintFull();
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}
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void ZoomEffect::actualSize()
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{
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target_zoom = 1;
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if( polling )
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{
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polling = false;
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effects->stopMousePolling();
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}
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effects->addRepaintFull();
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}
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void ZoomEffect::timelineFrameChanged(int /* frame */)
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{
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prevPoint.setX( qMax(0, qMin(displayWidth(), prevPoint.x() + xMove)) );
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prevPoint.setY( qMax(0, qMin(displayHeight(), prevPoint.y() + yMove)) );
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cursorPoint = prevPoint;
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effects->addRepaintFull();
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}
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void ZoomEffect::moveZoom(int x, int y)
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{
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if( timeline.state() == QTimeLine::Running )
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timeline.stop();
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if( x < 0 )
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xMove = - qMax(1.0, displayWidth() / zoom / moveFactor);
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else if( x > 0 )
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xMove = qMax(1.0, displayWidth() / zoom / moveFactor);
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else
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xMove = 0;
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if( y < 0 )
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yMove = - qMax(1.0, displayHeight() / zoom / moveFactor);
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else if( y > 0 )
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yMove = qMax(1.0, displayHeight() / zoom / moveFactor);
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else
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yMove = 0;
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timeline.start();
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}
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void ZoomEffect::moveZoomLeft()
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{
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moveZoom(-1, 0);
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}
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void ZoomEffect::moveZoomRight()
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{
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moveZoom(1, 0);
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}
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void ZoomEffect::moveZoomUp()
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{
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moveZoom(0, -1);
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}
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void ZoomEffect::moveZoomDown()
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{
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moveZoom(0, 1);
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}
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void ZoomEffect::moveMouseToFocus()
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{
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QCursor::setPos(focusPoint.x(), focusPoint.y());
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}
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void ZoomEffect::moveMouseToCenter()
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{
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//QRect r = effects->clientArea(KWin::ScreenArea, effects->activeScreen(), effects->currentDesktop());
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QRect r(0, 0, displayWidth(), displayHeight());
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QCursor::setPos(r.x() + r.width() / 2, r.y() + r.height() / 2);
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}
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void ZoomEffect::mouseChanged( const QPoint& pos, const QPoint& old, Qt::MouseButtons,
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Qt::MouseButtons, Qt::KeyboardModifiers, Qt::KeyboardModifiers )
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{
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if( zoom == 1.0 )
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return;
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cursorPoint = pos;
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if( pos != old )
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{
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lastMouseEvent = QTime::currentTime();
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effects->addRepaintFull();
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}
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}
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void ZoomEffect::focusChanged(int px, int py, int rx, int ry, int rwidth, int rheight)
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{
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if( zoom == 1.0 )
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return;
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focusPoint = (px >= 0 && py >= 0) ? QPoint(px, py) : QPoint( rx + qMax(0, (qMin(displayWidth(), rwidth)/2)-60), ry + qMax(0, (qMin(displayHeight(), rheight)/2)-60) );
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if( enableFocusTracking )
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{
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lastFocusEvent = QTime::currentTime();
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effects->addRepaintFull();
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}
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}
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} // namespace
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#include "zoom.moc"
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