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/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the test suite of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QtGui>
class DesktopView : public QGraphicsView
{
Q_OBJECT
public:
DesktopView()
: that(0)
{
scene = new QGraphicsScene;
setScene(scene);
QDesktopWidget *desktop = QApplication::desktop();
connect(desktop, SIGNAL(resized(int)), this, SLOT(updateScene()));
connect(desktop, SIGNAL(resized(int)), this, SLOT(desktopResized(int)));
connect(desktop, SIGNAL(workAreaResized(int)), this, SLOT(updateScene()));
connect(desktop, SIGNAL(workAreaResized(int)), this, SLOT(desktopWorkAreaResized(int)));
connect(desktop, SIGNAL(screenCountChanged(int)), this, SLOT(updateScene()));
connect(desktop, SIGNAL(screenCountChanged(int)), this, SLOT(desktopScreenCountChanged(int)));
updateScene();
QTransform transform;
transform.scale(0.25, 0.25);
setTransform(transform);
setBackgroundBrush(Qt::darkGray);
desktopScreenCountChanged(-1);
}
protected:
void moveEvent(QMoveEvent *e)
{
if (that) {
that->setRect(appRect());
scene->update();
}
QGraphicsView::moveEvent(e);
}
void resizeEvent(QResizeEvent *e)
{
if (that) {
that->setRect(appRect());
}
QGraphicsView::resizeEvent(e);
}
private slots:
void updateScene()
{
scene->clear();
const QDesktopWidget *desktop = QApplication::desktop();
const bool isVirtualDesktop = desktop->isVirtualDesktop();
const int homeScreen = desktop->screenNumber(this);
QRect sceneRect;
int screenCount = desktop->screenCount();
for (int s = 0; s < screenCount; ++s) {
const bool isPrimary = desktop->primaryScreen() == s;
const QRect screenRect = desktop->screenGeometry(s);
const QRect workRect = desktop->availableGeometry(s);
const QBrush fillBrush = palette().brush(isPrimary ? QPalette::Active : QPalette::Inactive, QPalette::Highlight);
QGraphicsRectItem *screen = new QGraphicsRectItem(0, 0, screenRect.width(), screenRect.height());
if (isVirtualDesktop) {
thatRoot = QPoint();
screen->setPos(screenRect.x(), screenRect.y());
} else {
// for non-virtual desktops we assume that screens are
// simply next to each other
if (s)
screen->setPos(sceneRect.right(), 0);
if (s == homeScreen)
thatRoot = screen->pos().toPoint();
}
screen->setBrush(fillBrush);
scene->addItem(screen);
sceneRect.setLeft(qMin(sceneRect.left(), screenRect.left()));
sceneRect.setRight(qMax(sceneRect.right(), screenRect.right()));
sceneRect.setTop(qMin(sceneRect.top(), screenRect.top()));
sceneRect.setBottom(qMax(sceneRect.bottom(), screenRect.bottom()));
QGraphicsRectItem *workArea = new QGraphicsRectItem(screen);
workArea->setRect(0, 0, workRect.width(), workRect.height());
workArea->setPos(workRect.x() - screenRect.x(), workRect.y() - screenRect.y());
workArea->setBrush(Qt::white);
QGraphicsSimpleTextItem *screenNumber = new QGraphicsSimpleTextItem(workArea);
screenNumber->setText(QString::number(s));
screenNumber->setPen(QPen(Qt::black, 1));
screenNumber->setBrush(fillBrush);
screenNumber->setFont(QFont("Arial Black", 18));
screenNumber->setTransform(QTransform().scale(10, 10));
screenNumber->setTransformOriginPoint(screenNumber->boundingRect().center());
QSizeF center = (workRect.size() - screenNumber->boundingRect().size()) / 2;
screenNumber->setPos(center.width(), center.height());
screen->show();
screen->setZValue(1);
}
if (isVirtualDesktop) {
QGraphicsRectItem *virtualDesktop = new QGraphicsRectItem;
virtualDesktop->setRect(sceneRect);
virtualDesktop->setPen(QPen(Qt::black));
virtualDesktop->setBrush(Qt::DiagCrossPattern);
scene->addItem(virtualDesktop);
virtualDesktop->setZValue(-1);
virtualDesktop->show();
}
that = new QGraphicsRectItem;
that->setBrush(Qt::red);
that->setOpacity(0.5);
that->setZValue(2);
that->setRect(appRect());
that->show();
scene->addItem(that);
scene->setSceneRect(sceneRect);
scene->update();
}
QRect appRect() const
{
QRect rect = frameGeometry();
if (!QApplication::desktop()->isVirtualDesktop()) {
rect.translate(thatRoot);
}
return rect;
}
void desktopResized(int screen)
{
qDebug() << "Screen was resized: " << screen
<< ", new size =" << QApplication::desktop()->screenGeometry(screen);
}
void desktopWorkAreaResized(int screen)
{
qDebug() << "Screen workarea was resized: " << screen
<< ", new size =" << QApplication::desktop()->availableGeometry(screen);
}
void desktopScreenCountChanged(int screenCount)
{
QDesktopWidget *desktop = QApplication::desktop();
qDebug() << "";
if (screenCount != -1) {
qDebug() << "Screen count was changed to " << screenCount;
} else {
screenCount = desktop->screenCount();
qDebug() << "Screen count: " << screenCount;
}
for (int i = 0; i < screenCount; ++i) {
qDebug() << " #" << i << ": geometry =" << desktop->screenGeometry(i)
<< "; available geometry =" << desktop->availableGeometry(i);
}
qDebug() << "";
}
private:
QGraphicsScene *scene;
QGraphicsRectItem *that;
QPoint thatRoot;
};
#include "main.moc"
int main(int argc, char **argv)
{
QApplication app(argc, argv);
DesktopView view;
view.show();
return app.exec();
}
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