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Diffstat (limited to 'src/gui/kernel/qplatformscreen_qpa.cpp')
| -rw-r--r-- | src/gui/kernel/qplatformscreen_qpa.cpp | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/src/gui/kernel/qplatformscreen_qpa.cpp b/src/gui/kernel/qplatformscreen_qpa.cpp new file mode 100644 index 0000000000..c9f3dc6f34 --- /dev/null +++ b/src/gui/kernel/qplatformscreen_qpa.cpp @@ -0,0 +1,129 @@ +/**************************************************************************** +** +** 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. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the Technology Preview License Agreement accompanying +** this package. +** +** GNU Lesser General Public License Usage +** Alternatively, 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. +** +** If you have questions regarding the use of this file, please contact +** Nokia at qt-info@nokia.com. +** +** +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#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; +} + +/*! \fn physicalSize() const + Reimplement in subclass to return the physical size of the screen. This function is used by + QFont to convert point sizes to pixel sizes. + + Default implementation takes the pixel size of the screen, considers a dpi of 100 and returns + the calculated (and probably wrong) physical size +*/ +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 geometry() const + Reimplement in subclass to return the pixel geometry of the screen +*/ + +/*! \fn 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 depth() const + Reimplement in subclass to return current depth of the screen +*/ + +/*! \fn format() const + Reimplement in subclass to return the image format which corresponds to the screen format +*/ + |