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     2 **

     3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

     4 ** All rights reserved.

     5 ** Contact: Nokia Corporation (qt-info@nokia.com)

     6 **

     7 ** This file is part of the QtGui module of the Qt Toolkit.

     8 **

     9 ** $QT_BEGIN_LICENSE:LGPL$

    10 ** No Commercial Usage

    11 ** This file contains pre-release code and may not be distributed.

    12 ** You may use this file in accordance with the terms and conditions

    13 ** contained in the Technology Preview License Agreement accompanying

    14 ** this package.

    15 **

    16 ** GNU Lesser General Public License Usage

    17 ** Alternatively, this file may be used under the terms of the GNU Lesser

    18 ** General Public License version 2.1 as published by the Free Software

    19 ** Foundation and appearing in the file LICENSE.LGPL included in the

    20 ** packaging of this file.  Please review the following information to

    21 ** ensure the GNU Lesser General Public License version 2.1 requirements

    22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

    23 **

    24 ** In addition, as a special exception, Nokia gives you certain additional

    25 ** rights.  These rights are described in the Nokia Qt LGPL Exception

    26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

    27 **

    28 ** If you have questions regarding the use of this file, please contact

    29 ** Nokia at qt-info@nokia.com.

    30 **

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    36 **

    37 **

    38 ** $QT_END_LICENSE$

    39 **

    40 ****************************************************************************/

    41 

    42 #include "qdesktopwidget.h"

    43 #include "qscreen_qws.h"

    44 #include "private/qapplication_p.h"

    45 

    46 QT_BEGIN_NAMESPACE

    47 

    48 QT_USE_NAMESPACE

    49 

    50 QDesktopWidget::QDesktopWidget()

    51     : QWidget(0, Qt::Desktop)

    52 {

    53     setObjectName(QLatin1String("desktop"));

    54 }

    55 

    56 QDesktopWidget::~QDesktopWidget()

    57 {

    58 }

    59 

    60 bool QDesktopWidget::isVirtualDesktop() const

    61 {

    62     return true;

    63 }

    64 

    65 int QDesktopWidget::primaryScreen() const

    66 {

    67     return 0;

    68 }

    69 

    70 int QDesktopWidget::numScreens() const

    71 {

    72     QScreen *screen = QScreen::instance();

    73     if (!screen)

    74         return 0;

    75 

    76     const QList<QScreen*> subScreens = screen->subScreens();

    77     return qMax(subScreens.size(), 1);

    78 }

    79 

    80 QWidget *QDesktopWidget::screen(int)

    81 {

    82     return this;

    83 }

    84 

    85 const QRect QDesktopWidget::availableGeometry(int screenNo) const

    86 {

    87     const QScreen *screen = QScreen::instance();

    88     if (screenNo == -1)

    89         screenNo = 0;

    90     if (!screen || screenNo < 0)

    91         return QRect();

    92 

    93     const QList<QScreen*> subScreens = screen->subScreens();

    94     if (!subScreens.isEmpty()) {

    95         if (screenNo >= subScreens.size())

    96             return QRect();

    97         screen = subScreens.at(screenNo);

    98     }

    99 

   100     QApplicationPrivate *ap = QApplicationPrivate::instance();

   101     const QRect r = ap->maxWindowRect(screen);

   102     if (!r.isEmpty())

   103         return r;

   104 

   105     return screen->region().boundingRect();

   106 }

   107 

   108 const QRect QDesktopWidget::screenGeometry(int screenNo) const

   109 {

   110     const QScreen *screen = QScreen::instance();

   111     if (screenNo == -1)

   112         screenNo = 0;

   113     if (!screen || screenNo < 0)

   114         return QRect();

   115 

   116     const QList<QScreen*> subScreens = screen->subScreens();

   117     if (subScreens.size() == 0 && screenNo == 0)

   118         return screen->region().boundingRect();

   119 

   120     if (screenNo >= subScreens.size())

   121         return QRect();

   122 

   123     return subScreens.at(screenNo)->region().boundingRect();

   124 }

   125 

   126 int QDesktopWidget::screenNumber(const QWidget *w) const

   127 {

   128     if (!w)

   129         return 0;

   130 

   131     QRect frame = w->frameGeometry();

   132     if (!w->isWindow())

   133         frame.moveTopLeft(w->mapToGlobal(QPoint(0, 0)));

   134     const QPoint midpoint = (frame.topLeft() + frame.bottomRight()) / 2;

   135     return screenNumber(midpoint);

   136 }

   137 

   138 int QDesktopWidget::screenNumber(const QPoint &p) const

   139 {

   140     const QScreen *screen = QScreen::instance();

   141     if (!screen || !screen->region().contains(p))

   142         return -1;

   143 

   144     const QList<QScreen*> subScreens = screen->subScreens();

   145     if (subScreens.size() == 0)

   146         return 0;

   147 

   148     for (int i = 0; i < subScreens.size(); ++i)

   149         if (subScreens.at(i)->region().contains(p))

   150             return i;

   151 

   152     return -1;

   153 }

   154 

   155 void QDesktopWidget::resizeEvent(QResizeEvent *)

   156 {

   157 }

   158 

   159 QT_END_NAMESPACE