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/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the test suite of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** 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 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "propertywatcher.h"
#include <QApplication>
#include <QScreen>
#include <QWindow>
#include <QDebug>
#include <QFormLayout>
#include <QLineEdit>
int i = 0;
typedef QHash<QScreen*, PropertyWatcher*> ScreensHash;
Q_GLOBAL_STATIC(ScreensHash, props);
void updateSiblings(PropertyWatcher* w)
{
QLineEdit *siblingsField = w->findChild<QLineEdit *>("siblings");
QScreen* screen = (QScreen*)w->subject();
QStringList siblingsList;
foreach (QScreen *sibling, screen->virtualSiblings())
siblingsList << sibling->name();
siblingsField->setText(siblingsList.join(", "));
}
void screenAdded(QScreen* screen)
{
screen->setOrientationUpdateMask((Qt::ScreenOrientations)0x0F);
qDebug("\nscreenAdded %s siblings %d first %s", qPrintable(screen->name()), screen->virtualSiblings().count(),
(screen->virtualSiblings().isEmpty() ? "none" : qPrintable(screen->virtualSiblings().first()->name())));
PropertyWatcher *w = new PropertyWatcher(screen, QString::number(i++));
QLineEdit *siblingsField = new QLineEdit();
siblingsField->setObjectName("siblings");
siblingsField->setReadOnly(true);
w->layout()->insertRow(0, "virtualSiblings", siblingsField);
updateSiblings(w);
// This doesn't work. If the multiple screens are part of
// a virtual desktop (i.e. they are virtual siblings), then
// setScreen has no effect, and we need the code below to
// change the window geometry. If on the other hand the
// screens are really separate, so that windows are not
// portable between them, XCreateWindow needs to have not just
// a different root Window but also a different Display, in order to
// put the window on the other screen. That would require a
// different QXcbConnection. So this setScreen call doesn't seem useful.
//w->windowHandle()->setScreen(screen);
// But this works as long as the screens are all virtual siblings
w->show();
QRect geom = w->geometry();
geom.moveCenter(screen->geometry().center());
w->move(geom.topLeft());
props->insert(screen, w);
// workaround for the fact that virtualSiblings is not a property,
// thus there is no change notification:
// allow the user to update the field manually
QObject::connect(w, &PropertyWatcher::updatedAllFields, &updateSiblings);
}
void screenRemoved(QScreen* screen)
{
delete props->take(screen);
}
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
QList<QScreen *> screens = QGuiApplication::screens();
foreach (QScreen *screen, screens)
screenAdded(screen);
QObject::connect((const QGuiApplication*)QGuiApplication::instance(), &QGuiApplication::screenAdded, &screenAdded);
QObject::connect((const QGuiApplication*)QGuiApplication::instance(), &QGuiApplication::screenRemoved, &screenRemoved);
return a.exec();
}
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