133 lines
4.5 KiB
C++
133 lines
4.5 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2011 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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#include "qplatformscreen_qpa.h"
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#include <QtGui/qapplication.h>
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#include <QtGui/private/qapplication_p.h>
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#include <QtGui/qdesktopwidget.h>
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#include <QtGui/qplatformintegration_qpa.h>
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#include <QtGui/qwidget.h>
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#include <QtGui/private/qwidget_p.h>
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/*!
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Return the given top level widget for a given position.
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Default implementation retrieves a list of all top level widgets and finds the first widget
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which contains point \a pos
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*/
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QWidget *QPlatformScreen::topLevelAt(const QPoint & pos) const
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{
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QWidgetList list = QApplication::topLevelWidgets();
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for (int i = list.size()-1; i >= 0; --i) {
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QWidget *w = list[i];
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//### mask is ignored
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if (w != QApplication::desktop() && w->isVisible() && w->geometry().contains(pos))
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return w;
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}
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return 0;
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}
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/*! \fn physicalSize() const
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Reimplement in subclass to return the physical size of the screen. This function is used by
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QFont to convert point sizes to pixel sizes.
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Default implementation takes the pixel size of the screen, considers a dpi of 100 and returns
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the calculated (and probably wrong) physical size
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*/
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QSize QPlatformScreen::physicalSize() const
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{
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static const int dpi = 100;
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int width = geometry().width() / dpi * qreal(25.4) ;
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int height = geometry().height() / dpi * qreal(25.4) ;
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return QSize(width,height);
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}
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Q_GUI_EXPORT extern QWidgetPrivate *qt_widget_private(QWidget *widget);
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QPlatformScreen * QPlatformScreen::platformScreenForWidget(const QWidget *widget)
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{
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int screenIndex = 0;
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QWidget *window = widget->window();
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QWidgetPrivate *windowPrivate = qt_widget_private(window);
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QTLWExtra * topData = windowPrivate->maybeTopData();
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if (topData)
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screenIndex = topData->screenIndex;
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QPlatformIntegration *integration =
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QApplicationPrivate::platformIntegration();
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return integration->screens()[screenIndex];
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}
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/*!
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\class QPlatformScreen
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\since 4.8
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\internal
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\preliminary
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\ingroup qpa
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\brief The QPlatformScreen class provides an abstraction for visual displays.
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Many window systems has support for retrieving information on the attached displays. To be able
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to query the display QPA uses QPlatformScreen. Qt its self is most dependent on the
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physicalSize() function, since this is the function it uses to calculate the dpi to use when
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converting point sizes to pixels sizes. However, this is unfortunate on some systems, as the
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native system fakes its dpi size.
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QPlatformScreen is also used by the public api QDesktopWidget for information about the desktop.
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*/
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/*! \fn geometry() const
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Reimplement in subclass to return the pixel geometry of the screen
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*/
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/*! \fn availableGeometry() const
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Reimplement in subclass to return the pixel geometry of the available space
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This normally is the desktop screen minus the task manager, global menubar etc.
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*/
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/*! \fn depth() const
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Reimplement in subclass to return current depth of the screen
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*/
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/*! \fn format() const
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Reimplement in subclass to return the image format which corresponds to the screen format
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*/
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