1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
|
/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** 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.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qplatformscreen_qpa.h"
#include <QtGui/qapplication.h>
#include <QtGui/private/qapplication_p.h>
#include <QtGui/qdesktopwidget.h>
#include <QtGui/qplatformintegration_qpa.h>
#include <QtGui/qwidget.h>
#include <QtGui/private/qwidget_p.h>
/*!
Return the given top level widget for a given position.
Default implementation retrieves a list of all top level widgets and finds the first widget
which contains point \a pos
*/
QWidget *QPlatformScreen::topLevelAt(const QPoint & pos) const
{
QWidgetList list = QApplication::topLevelWidgets();
for (int i = list.size()-1; i >= 0; --i) {
QWidget *w = list[i];
//### mask is ignored
if (w != QApplication::desktop() && w->isVisible() && w->geometry().contains(pos))
return w;
}
return 0;
}
/*!
Reimplement this function in subclass to return the physical size of the
screen. This function is used by QFont to convert point sizes to pixel
sizes.
The default implementation takes the pixel size of the screen, considers a
resolution of 100 dots per inch, and returns the calculated physical size.
A device with a screen that has different resolutions will need to be
supported by a suitable reimplementation of this function.
*/
QSize QPlatformScreen::physicalSize() const
{
static const int dpi = 100;
int width = geometry().width() / dpi * qreal(25.4) ;
int height = geometry().height() / dpi * qreal(25.4) ;
return QSize(width,height);
}
Q_GUI_EXPORT extern QWidgetPrivate *qt_widget_private(QWidget *widget);
QPlatformScreen * QPlatformScreen::platformScreenForWidget(const QWidget *widget)
{
QWidget *window = widget->window();
QWidgetPrivate *windowPrivate = qt_widget_private(window);
QTLWExtra * topData = windowPrivate->topData();
QPlatformIntegration *integration =
QApplicationPrivate::platformIntegration();
return integration->screens()[topData->screenIndex];
}
/*!
\class QPlatformScreen
\since 4.8
\internal
\preliminary
\ingroup qpa
\brief The QPlatformScreen class provides an abstraction for visual displays.
Many window systems has support for retrieving information on the attached displays. To be able
to query the display QPA uses QPlatformScreen. Qt its self is most dependent on the
physicalSize() function, since this is the function it uses to calculate the dpi to use when
converting point sizes to pixels sizes. However, this is unfortunate on some systems, as the
native system fakes its dpi size.
QPlatformScreen is also used by the public api QDesktopWidget for information about the desktop.
*/
/*! \fn QRect QPlatformScreen::geometry() const = 0
Reimplement in subclass to return the pixel geometry of the screen
*/
/*! \fn QRect QPlatformScreen::availableGeometry() const
Reimplement in subclass to return the pixel geometry of the available space
This normally is the desktop screen minus the task manager, global menubar etc.
*/
/*! \fn int QPlatformScreen::depth() const = 0
Reimplement in subclass to return current depth of the screen
*/
/*! \fn QImage::Format QPlatformScreen::format() const = 0
Reimplement in subclass to return the image format which corresponds to the screen format
*/
|
