206 lines
7.6 KiB
C++
206 lines
7.6 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) 2007 Lubos Lunak <l.lunak@kde.org>
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Copyright (C) 2007 Christian Nitschkowski <christian.nitschkowski@kdemail.net>
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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 "magnifier.h"
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#include <kwinconfig.h>
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#include <kaction.h>
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#include <kactioncollection.h>
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#include <kconfiggroup.h>
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#include <kstandardaction.h>
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#include <kwinglutils.h>
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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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, polling(false)
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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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reconfigure(ReconfigureAll);
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}
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void MagnifierEffect::reconfigure(ReconfigureFlags)
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{
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KConfigGroup conf = EffectsHandler::effectConfig("Magnifier");
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int width, height;
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width = conf.readEntry("Width", 200);
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height = conf.readEntry("Height", 200);
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magnifier_size = QSize(width, height);
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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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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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effects->prePaintScreen(data, time);
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if (zoom != 1.0)
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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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QRect area = magnifierArea();
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PaintClipper::push(area); // don't allow any painting outside of the area
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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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PaintClipper::pop(area);
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QVector<float> verts;
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GLVertexBuffer *vbo = GLVertexBuffer::streamingBuffer();
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vbo->reset();
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vbo->setColor(QColor(0, 0, 0));
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// top frame
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verts << area.right() + FRAME_WIDTH << area.top() - FRAME_WIDTH;
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verts << area.left() - FRAME_WIDTH << area.top() - FRAME_WIDTH;
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verts << area.left() - FRAME_WIDTH << area.top() - 1;
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verts << area.left() - FRAME_WIDTH << area.top() - 1;
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verts << area.right() + FRAME_WIDTH << area.top() - 1;
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verts << area.right() + FRAME_WIDTH << area.top() - FRAME_WIDTH;
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// left frame
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verts << area.left() - 1 << area.top() - FRAME_WIDTH;
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verts << area.left() - FRAME_WIDTH << area.top() - FRAME_WIDTH;
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verts << area.left() - FRAME_WIDTH << area.bottom() + FRAME_WIDTH;
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verts << area.left() - FRAME_WIDTH << area.bottom() + FRAME_WIDTH;
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verts << area.left() - 1 << area.bottom() + FRAME_WIDTH;
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verts << area.left() - 1 << area.top() - FRAME_WIDTH;
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// right frame
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verts << area.right() + FRAME_WIDTH << area.top() - FRAME_WIDTH;
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verts << area.right() + 1 << area.top() - FRAME_WIDTH;
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verts << area.right() + 1 << area.bottom() + FRAME_WIDTH;
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verts << area.right() + 1 << area.bottom() + FRAME_WIDTH;
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verts << area.right() + FRAME_WIDTH << area.bottom() + FRAME_WIDTH;
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verts << area.right() + FRAME_WIDTH << area.top() - FRAME_WIDTH;
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// bottom frame
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verts << area.right() + FRAME_WIDTH << area.bottom() + 1;
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verts << area.left() - FRAME_WIDTH << area.bottom() + 1;
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verts << area.left() - FRAME_WIDTH << area.bottom() + FRAME_WIDTH;
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verts << area.left() - FRAME_WIDTH << area.bottom() + FRAME_WIDTH;
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verts << area.right() + FRAME_WIDTH << area.bottom() + FRAME_WIDTH;
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verts << area.right() + FRAME_WIDTH << area.bottom() + 1;
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vbo->setData(verts.size() / 2, 2, verts.constData(), NULL);
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if (ShaderManager::instance()->isValid()) {
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ShaderManager::instance()->pushShader(ShaderManager::ColorShader);
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}
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vbo->render(GL_TRIANGLES);
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if (ShaderManager::instance()->isValid()) {
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ShaderManager::instance()->popShader();
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}
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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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QRect framedarea = magnifierArea().adjusted(-FRAME_WIDTH, -FRAME_WIDTH, FRAME_WIDTH, FRAME_WIDTH);
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effects->addRepaint(framedarea);
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}
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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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if (!polling) {
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polling = true;
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effects->startMousePolling();
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}
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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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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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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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if (!polling) {
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polling = true;
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effects->startMousePolling();
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}
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} else {
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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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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,
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Qt::MouseButtons, Qt::MouseButtons, Qt::KeyboardModifiers, Qt::KeyboardModifiers)
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{
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if (pos != old && zoom != 1)
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// need full repaint as we might lose some change events on fast mouse movements
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// see Bug 187658
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effects->addRepaintFull();
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}
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} // namespace
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#include "magnifier.moc"
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