504 lines
18 KiB
C++
504 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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// KConfigSkeleton
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#include "zoomconfig.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 <QtCore/QtDebug>
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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 <QtGui/QVector2D>
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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 <KDE/KConfigGroup>
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#include <KDE/KLocale>
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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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KWIN_EFFECT(zoom, ZoomEffect)
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ZoomEffect::ZoomEffect()
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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 Zoomed Area to 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 Zoomed Area to 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 Zoomed Area Upwards"));
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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 Zoomed Area Downwards"));
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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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// TODO: these two actions don't belong into the effect. They need to be moved into KWin core
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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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connect(effects, SIGNAL(mouseChanged(QPoint,QPoint,Qt::MouseButtons,Qt::MouseButtons,Qt::KeyboardModifiers,Qt::KeyboardModifiers)),
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this, SLOT(slotMouseChanged(QPoint,QPoint,Qt::MouseButtons,Qt::MouseButtons,Qt::KeyboardModifiers,Qt::KeyboardModifiers)));
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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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// Save the zoom value.
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KConfigGroup conf = EffectsHandler::effectConfig("Zoom");
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conf.writeEntry("InitialZoom", target_zoom);
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conf.sync();
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}
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void ZoomEffect::showCursor()
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{
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if (isMouseHidden) {
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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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}
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void ZoomEffect::hideCursor()
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{
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if (mouseTracking == MouseTrackingProportional && mousePointer == MousePointerKeep)
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return; // don't replace the actual cursor by a static image for no reason.
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if (!isMouseHidden) {
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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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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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}
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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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// 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", theme.toLocal8Bit(), iconSize);
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if (!ximg) // default is better then nothing, so keep it as backup
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ximg = XcursorLibraryLoadImage("left_ptr", "default", iconSize);
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if (ximg) {
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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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if (effects->isOpenGLCompositing())
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texture = new GLTexture(img);
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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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else {
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qDebug() << "Loading cursor image (" << theme << ") FAILED -> falling back to proportional mouse tracking!";
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mouseTracking = MouseTrackingProportional;
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}
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}
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void ZoomEffect::reconfigure(ReconfigureFlags)
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{
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ZoomConfig::self()->readConfig();
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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, ZoomConfig::zoomFactor());
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// Visibility of the mouse-pointer.
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mousePointer = MousePointerType(ZoomConfig::mousePointer());
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// Track moving of the mouse.
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mouseTracking = MouseTrackingType(ZoomConfig::mouseTracking());
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// Enable tracking of the focused location.
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bool _enableFocusTracking = ZoomConfig::enableFocusTracking();
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if (enableFocusTracking != _enableFocusTracking) {
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enableFocusTracking = _enableFocusTracking;
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if (QDBusConnection::sessionBus().isConnected()) {
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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 = ZoomConfig::enableFollowFocus();
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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(uint(0), ZoomConfig::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, ZoomConfig::moveFactor());
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// Load the saved zoom value.
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target_zoom = ZoomConfig::initialZoom();
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if (target_zoom > 1.0)
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zoomIn(target_zoom);
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}
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void ZoomEffect::prePaintScreen(ScreenPrePaintData& data, int time)
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{
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bool altered = false;
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if (zoom != target_zoom) {
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altered = true;
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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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showCursor();
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if (altered) // reset the generic shader to avoid artifacts in plenty other effects
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ShaderBinder binder(ShaderManager::GenericShader, true);
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} else {
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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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#ifdef KWIN_HAVE_XRENDER_COMPOSITING
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static XTransform xrenderIdentity = {{
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{ XDoubleToFixed( 1.0 ), XDoubleToFixed( 0.0 ), XDoubleToFixed( 0.0 ) },
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{ XDoubleToFixed( 0.0 ), XDoubleToFixed( 1.0 ), XDoubleToFixed( 0.0 ) },
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{ XDoubleToFixed( 0.0 ), XDoubleToFixed( 0.0 ), XDoubleToFixed( 1.0 ) }
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}};
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#endif
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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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data *= QVector2D(zoom, 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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case MouseTrackingProportional:
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data.setXTranslation(- int(cursorPoint.x() * (zoom - 1.0)));
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data.setYTranslation(- 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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prevPoint = cursorPoint;
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// fall through
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case MouseTrackingDisabled:
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data.setXTranslation(qMin(0, qMax(int(displayWidth() - displayWidth() * zoom), int(displayWidth() / 2 - prevPoint.x() * zoom))));
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data.setYTranslation(qMin(0, qMax(int(displayHeight() - displayHeight() * zoom), int(displayHeight() / 2 - prevPoint.y() * zoom))));
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break;
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case MouseTrackingPush:
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if (timeline.state() != QTimeLine::Running) {
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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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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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data.setXTranslation(- int(prevPoint.x() * (zoom - 1.0)));
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data.setYTranslation(- 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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bool acceptFocus = true;
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if (mouseTracking != MouseTrackingDisabled && focusDelay > 0) {
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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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data.setXTranslation(- int(focusPoint.x() * (zoom - 1.0)));
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data.setYTranslation(- 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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// 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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int w = imageWidth;
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int h = imageHeight;
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if (mousePointer == MousePointerScale) {
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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.xTranslation(), p.y() * zoom + data.yTranslation(), w, h);
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if (texture) {
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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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texture->render(region, rect);
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texture->unbind();
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glDisable(GL_BLEND);
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}
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#ifdef KWIN_HAVE_XRENDER_COMPOSITING
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if (xrenderPicture) {
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if (mousePointer == MousePointerScale) {
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XRenderSetPictureFilter(display(), *xrenderPicture, const_cast<char*>("good"), NULL, 0);
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XTransform xform = {{
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{ XDoubleToFixed( 1.0 / zoom ), XDoubleToFixed( 0.0 ), XDoubleToFixed( 0.0 ) },
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{ XDoubleToFixed( 0.0 ), XDoubleToFixed( 1.0 / zoom ), XDoubleToFixed( 0.0 ) },
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{ XDoubleToFixed( 0.0 ), XDoubleToFixed( 0.0 ), XDoubleToFixed( 1.0 ) }
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}};
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XRenderSetPictureTransform( display(), *xrenderPicture, &xform );
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}
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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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if (mousePointer == MousePointerScale)
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XRenderSetPictureTransform( display(), *xrenderPicture, &xrenderIdentity );
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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(double to)
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{
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if (to < 0.0)
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target_zoom *= zoomFactor;
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else
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target_zoom = to;
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if (!polling) {
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polling = true;
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effects->startMousePolling();
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}
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if (mouseTracking == MouseTrackingDisabled)
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prevPoint = QCursor::pos();
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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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target_zoom = 1;
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if (polling) {
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polling = false;
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effects->stopMousePolling();
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}
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}
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if (mouseTracking == MouseTrackingDisabled)
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prevPoint = QCursor::pos();
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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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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::slotMouseChanged(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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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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lastFocusEvent = QTime::currentTime();
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effects->addRepaintFull();
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}
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}
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bool ZoomEffect::isActive() const
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{
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return zoom != 1.0 || zoom != target_zoom;
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}
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} // namespace
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#include "zoom.moc"
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