src/gui/kernel/qdesktopwidget_mac.mm
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Fri, 14 May 2010 16:40:13 +0300
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/****************************************************************************
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**
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** Copyright (C) 2010 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 QtGui module 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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/****************************************************************************
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**
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** Copyright (c) 2007-2008, Apple, Inc.
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**
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** All rights reserved.
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**
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** Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions are met:
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**
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**   * Redistributions of source code must retain the above copyright notice,
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**     this list of conditions and the following disclaimer.
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**
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**   * Redistributions in binary form must reproduce the above copyright notice,
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**     this list of conditions and the following disclaimer in the documentation
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**     and/or other materials provided with the distribution.
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**
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**   * Neither the name of Apple, Inc. nor the names of its contributors
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**     may be used to endorse or promote products derived from this software
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**     without specific prior written permission.
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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** CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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** EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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** PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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** PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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** LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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** NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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** SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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**
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****************************************************************************/
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#import <Cocoa/Cocoa.h>
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#include "qapplication.h"
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#include "qdesktopwidget.h"
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#include <private/qt_mac_p.h>
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#include "qwidget_p.h"
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#include <private/qt_cocoa_helpers_mac_p.h>
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#include <private/qdesktopwidget_mac_p.h>
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QT_BEGIN_NAMESPACE
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QT_USE_NAMESPACE
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/*****************************************************************************
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  Externals
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 *****************************************************************************/
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/*****************************************************************************
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  QDesktopWidget member functions
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 *****************************************************************************/
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Q_GLOBAL_STATIC(QDesktopWidgetImplementation, qdesktopWidgetImplementation)
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QDesktopWidgetImplementation::QDesktopWidgetImplementation()
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    : appScreen(0)
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{
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    onResize();
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}
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QDesktopWidgetImplementation::~QDesktopWidgetImplementation()
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{
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}
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QDesktopWidgetImplementation *QDesktopWidgetImplementation::instance()
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{
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    return qdesktopWidgetImplementation();
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}
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QRect QDesktopWidgetImplementation::availableRect(int screenIndex) const
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{
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    if (screenIndex < 0 || screenIndex >= screenCount)
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        screenIndex = appScreen;
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	return availableRects[screenIndex].toRect(); 
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}
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QRect QDesktopWidgetImplementation::screenRect(int screenIndex) const
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{
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    if (screenIndex < 0 || screenIndex >= screenCount)
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        screenIndex = appScreen;
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    return screenRects[screenIndex].toRect();
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}
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void QDesktopWidgetImplementation::onResize()
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{
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    QMacCocoaAutoReleasePool pool; 
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    NSArray *displays = [NSScreen screens]; 
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    screenCount = [displays count]; 
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    screenRects.clear(); 
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    availableRects.clear(); 
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    NSRect primaryRect = [[displays objectAtIndex:0] frame]; 
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    for (int i = 0; i<screenCount; i++) {
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        NSRect r = [[displays objectAtIndex:i] frame];
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        int flippedY = - r.origin.y +                  // account for position offset and
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              primaryRect.size.height - r.size.height; // height difference. 
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        screenRects.append(QRectF(r.origin.x, flippedY, 
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            r.size.width, r.size.height)); 
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        r = [[displays objectAtIndex:i] visibleFrame];
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        flippedY = - r.origin.y +                      // account for position offset and
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              primaryRect.size.height - r.size.height; // height difference. 
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        availableRects.append(QRectF(r.origin.x, flippedY, 
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                r.size.width, r.size.height)); 
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    }
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}
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QDesktopWidget::QDesktopWidget()
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    : QWidget(0, Qt::Desktop)
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{
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    setObjectName(QLatin1String("desktop"));
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    setAttribute(Qt::WA_WState_Visible);
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}
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QDesktopWidget::~QDesktopWidget()
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{
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}
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bool QDesktopWidget::isVirtualDesktop() const
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{
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    return true;
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}
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int QDesktopWidget::primaryScreen() const
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{
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    return qdesktopWidgetImplementation()->appScreen;
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}
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int QDesktopWidget::numScreens() const
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{
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    return qdesktopWidgetImplementation()->screenCount;
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}
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QWidget *QDesktopWidget::screen(int)
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{
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    return this;
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}
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const QRect QDesktopWidget::availableGeometry(int screen) const
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{
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    return qdesktopWidgetImplementation()->availableRect(screen);
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}
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const QRect QDesktopWidget::screenGeometry(int screen) const
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{
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    return qdesktopWidgetImplementation()->screenRect(screen);
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}
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int QDesktopWidget::screenNumber(const QWidget *widget) const
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{
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    QDesktopWidgetImplementation *d = qdesktopWidgetImplementation();
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    if (!widget)
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        return d->appScreen;
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    QRect frame = widget->frameGeometry();
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    if (!widget->isWindow())
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        frame.moveTopLeft(widget->mapToGlobal(QPoint(0,0)));
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    int maxSize = -1, maxScreen = -1;
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    for (int i = 0; i < d->screenCount; ++i) {
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        QRect rr = d->screenRect(i);
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        QRect sect = rr.intersected(frame);
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        int size = sect.width() * sect.height();
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        if (size > maxSize && sect.width() > 0 && sect.height() > 0) {
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            maxSize = size;
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            maxScreen = i;
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        }
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    }
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    return maxScreen;
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}
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int QDesktopWidget::screenNumber(const QPoint &point) const
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{
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    QDesktopWidgetImplementation *d = qdesktopWidgetImplementation();
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    int closestScreen = -1;
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    int shortestDistance = INT_MAX;
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    for (int i = 0; i < d->screenCount; ++i) {
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        QRect rr = d->screenRect(i);
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        int thisDistance = QWidgetPrivate::pointToRect(point, rr);
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        if (thisDistance < shortestDistance) {
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            shortestDistance = thisDistance;
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            closestScreen = i;
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        }
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    }
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    return closestScreen;
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}
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void QDesktopWidget::resizeEvent(QResizeEvent *)
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{
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    QDesktopWidgetImplementation *d = qdesktopWidgetImplementation();
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    const int oldScreenCount = d->screenCount;
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    const QVector<QRectF> oldRects(d->screenRects);
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    const QVector<QRectF> oldWorks(d->availableRects);
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    d->onResize();
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    for (int i = 0; i < qMin(oldScreenCount, d->screenCount); ++i) {
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        if (oldRects.at(i) != d->screenRects.at(i))
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            emit resized(i);
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    }
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    for (int i = 0; i < qMin(oldScreenCount, d->screenCount); ++i) {
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        if (oldWorks.at(i) != d->availableRects.at(i))
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            emit workAreaResized(i);
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    }
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    if (oldScreenCount != d->screenCount)
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        emit screenCountChanged(d->screenCount);
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}
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QT_END_NAMESPACE