220 lines
7.4 KiB
C++
220 lines
7.4 KiB
C++
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/****************************************************************************
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**
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** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** This file is part of the test suite of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** No Commercial Usage
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** This file contains pre-release code and may not be distributed.
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** You may use this file in accordance with the terms and conditions
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** contained in the Technology Preview License Agreement accompanying
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** this package.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** If you have questions regarding the use of this file, please contact
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** Nokia at qt-info@nokia.com.
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**
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**
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**
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**
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**
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**
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**
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include <QtGui>
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class DesktopView : public QGraphicsView
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{
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Q_OBJECT
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public:
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DesktopView()
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: that(0)
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{
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scene = new QGraphicsScene;
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setScene(scene);
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QDesktopWidget *desktop = QApplication::desktop();
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connect(desktop, SIGNAL(resized(int)), this, SLOT(updateScene()));
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connect(desktop, SIGNAL(resized(int)), this, SLOT(desktopResized(int)));
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connect(desktop, SIGNAL(workAreaResized(int)), this, SLOT(updateScene()));
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connect(desktop, SIGNAL(workAreaResized(int)), this, SLOT(desktopWorkAreaResized(int)));
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connect(desktop, SIGNAL(screenCountChanged(int)), this, SLOT(updateScene()));
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connect(desktop, SIGNAL(screenCountChanged(int)), this, SLOT(desktopScreenCountChanged(int)));
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updateScene();
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QTransform transform;
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transform.scale(0.25, 0.25);
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setTransform(transform);
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setBackgroundBrush(Qt::darkGray);
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desktopScreenCountChanged(-1);
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}
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protected:
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void moveEvent(QMoveEvent *e)
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{
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if (that) {
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that->setRect(appRect());
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scene->update();
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}
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QGraphicsView::moveEvent(e);
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}
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void resizeEvent(QResizeEvent *e)
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{
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if (that) {
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that->setRect(appRect());
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}
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QGraphicsView::resizeEvent(e);
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}
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private slots:
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void updateScene()
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{
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scene->clear();
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const QDesktopWidget *desktop = QApplication::desktop();
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const bool isVirtualDesktop = desktop->isVirtualDesktop();
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const int homeScreen = desktop->screenNumber(this);
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QRect sceneRect;
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int screenCount = desktop->screenCount();
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for (int s = 0; s < screenCount; ++s) {
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const bool isPrimary = desktop->primaryScreen() == s;
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const QRect screenRect = desktop->screenGeometry(s);
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const QRect workRect = desktop->availableGeometry(s);
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const QBrush fillBrush = palette().brush(isPrimary ? QPalette::Active : QPalette::Inactive, QPalette::Highlight);
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QGraphicsRectItem *screen = new QGraphicsRectItem(0, 0, screenRect.width(), screenRect.height());
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if (isVirtualDesktop) {
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thatRoot = QPoint();
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screen->setPos(screenRect.x(), screenRect.y());
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} else {
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// for non-virtual desktops we assume that screens are
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// simply next to each other
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if (s)
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screen->setPos(sceneRect.right(), 0);
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if (s == homeScreen)
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thatRoot = screen->pos().toPoint();
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}
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screen->setBrush(fillBrush);
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scene->addItem(screen);
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sceneRect.setLeft(qMin(sceneRect.left(), screenRect.left()));
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sceneRect.setRight(qMax(sceneRect.right(), screenRect.right()));
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sceneRect.setTop(qMin(sceneRect.top(), screenRect.top()));
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sceneRect.setBottom(qMax(sceneRect.bottom(), screenRect.bottom()));
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QGraphicsRectItem *workArea = new QGraphicsRectItem(screen);
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workArea->setRect(0, 0, workRect.width(), workRect.height());
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workArea->setPos(workRect.x() - screenRect.x(), workRect.y() - screenRect.y());
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workArea->setBrush(Qt::white);
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QGraphicsSimpleTextItem *screenNumber = new QGraphicsSimpleTextItem(workArea);
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screenNumber->setText(QString::number(s));
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screenNumber->setPen(QPen(Qt::black, 1));
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screenNumber->setBrush(fillBrush);
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screenNumber->setFont(QFont("Arial Black", 18));
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screenNumber->setTransform(QTransform().scale(10, 10));
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screenNumber->setTransformOriginPoint(screenNumber->boundingRect().center());
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QSizeF center = (workRect.size() - screenNumber->boundingRect().size()) / 2;
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screenNumber->setPos(center.width(), center.height());
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screen->show();
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screen->setZValue(1);
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}
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if (isVirtualDesktop) {
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QGraphicsRectItem *virtualDesktop = new QGraphicsRectItem;
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virtualDesktop->setRect(sceneRect);
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virtualDesktop->setPen(QPen(Qt::black));
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virtualDesktop->setBrush(Qt::DiagCrossPattern);
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scene->addItem(virtualDesktop);
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virtualDesktop->setZValue(-1);
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virtualDesktop->show();
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}
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that = new QGraphicsRectItem;
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that->setBrush(Qt::red);
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that->setOpacity(0.5);
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that->setZValue(2);
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that->setRect(appRect());
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that->show();
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scene->addItem(that);
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scene->setSceneRect(sceneRect);
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scene->update();
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}
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QRect appRect() const
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{
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QRect rect = frameGeometry();
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if (!QApplication::desktop()->isVirtualDesktop()) {
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rect.translate(thatRoot);
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}
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return rect;
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}
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void desktopResized(int screen)
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{
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qDebug() << "Screen was resized: " << screen
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<< ", new size =" << QApplication::desktop()->screenGeometry(screen);
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}
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void desktopWorkAreaResized(int screen)
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{
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qDebug() << "Screen workarea was resized: " << screen
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<< ", new size =" << QApplication::desktop()->availableGeometry(screen);
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}
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void desktopScreenCountChanged(int screenCount)
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{
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QDesktopWidget *desktop = QApplication::desktop();
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qDebug() << "";
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if (screenCount != -1) {
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qDebug() << "Screen count was changed to " << screenCount;
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} else {
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screenCount = desktop->screenCount();
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qDebug() << "Screen count: " << screenCount;
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}
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for (int i = 0; i < screenCount; ++i) {
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qDebug() << " #" << i << ": geometry =" << desktop->screenGeometry(i)
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<< "; available geometry =" << desktop->availableGeometry(i);
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}
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qDebug() << "";
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}
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private:
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QGraphicsScene *scene;
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QGraphicsRectItem *that;
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QPoint thatRoot;
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};
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#include "main.moc"
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int main(int argc, char **argv)
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{
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QApplication app(argc, argv);
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DesktopView view;
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view.show();
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return app.exec();
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}
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