1 /****************************************************************************
2 **
3 ** Copyright (C) 2015 The Qt Company Ltd.
4 ** Contact: http://www.qt.io/licensing/
5 **
6 ** This file is part of the QtGui module of the Qt Toolkit.
7 **
8 ** $QT_BEGIN_LICENSE:LGPL$
9 ** Commercial License Usage
10 ** Licensees holding valid commercial Qt licenses may use this file in
11 ** accordance with the commercial license agreement provided with the
12 ** Software or, alternatively, in accordance with the terms contained in
13 ** a written agreement between you and The Qt Company. For licensing terms
14 ** and conditions see http://www.qt.io/terms-conditions. For further
15 ** information use the contact form at http://www.qt.io/contact-us.
16 **
17 ** GNU Lesser General Public License Usage
18 ** Alternatively, this file may be used under the terms of the GNU Lesser
19 ** General Public License version 2.1 or version 3 as published by the Free
20 ** Software Foundation and appearing in the file LICENSE.LGPLv21 and
21 ** LICENSE.LGPLv3 included in the packaging of this file. Please review the
22 ** following information to ensure the GNU Lesser General Public License
23 ** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
24 ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
25 **
26 ** As a special exception, The Qt Company gives you certain additional
27 ** rights. These rights are described in The Qt Company LGPL Exception
28 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
29 **
30 ** GNU General Public License Usage
31 ** Alternatively, this file may be used under the terms of the GNU
32 ** General Public License version 3.0 as published by the Free Software
33 ** Foundation and appearing in the file LICENSE.GPL included in the
34 ** packaging of this file.  Please review the following information to
35 ** ensure the GNU General Public License version 3.0 requirements will be
36 ** met: http://www.gnu.org/copyleft/gpl.html.
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 
QDesktopWidget()50 QDesktopWidget::QDesktopWidget()
51     : QWidget(0, Qt::Desktop)
52 {
53     setObjectName(QLatin1String("desktop"));
54 }
55 
~QDesktopWidget()56 QDesktopWidget::~QDesktopWidget()
57 {
58 }
59 
isVirtualDesktop() const60 bool QDesktopWidget::isVirtualDesktop() const
61 {
62     return true;
63 }
64 
primaryScreen() const65 int QDesktopWidget::primaryScreen() const
66 {
67     return 0;
68 }
69 
numScreens() const70 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 
screen(int)80 QWidget *QDesktopWidget::screen(int)
81 {
82     return this;
83 }
84 
availableGeometry(int screenNo) const85 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 
screenGeometry(int screenNo) const108 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 
screenNumber(const QWidget * w) const126 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 
screenNumber(const QPoint & p) const138 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 
resizeEvent(QResizeEvent *)155 void QDesktopWidget::resizeEvent(QResizeEvent *)
156 {
157 }
158 
159 QT_END_NAMESPACE
160