src/svg/qsvgwidget.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Fri, 19 Feb 2010 23:40:16 +0200
branchRCL_3
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Revision: 201003 Kit: 201007
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/****************************************************************************
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**
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** Copyright (C) 2010 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 QtSvg 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 "qsvgwidget.h"
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#ifndef QT_NO_SVGWIDGET
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#include "qsvgrenderer.h"
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#include "qpainter.h"
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#include "private/qwidget_p.h"
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QT_BEGIN_NAMESPACE
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/*!
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    \class QSvgWidget
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    \ingroup painting
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    \brief The QSvgWidget class provides a widget that is used to display the contents of
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    Scalable Vector Graphics (SVG) files.
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    \since 4.1
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    This class enables developers to display SVG drawings alongside standard widgets, and
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    is used in much the same way as QLabel is used for displaying text and bitmap images.
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    Since QSvgWidget is a subclass of QWidget, SVG drawings are rendered using the properties
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    of the display. More control can be exercised over the rendering process with the
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    QSvgRenderer class, as this can be used to paint onto other paint devices, such as QImage
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    and QGLWidget. The renderer used by the widget can be obtained with the renderer()
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    function.
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    Each QSvgWidget can be constructed with the file name of a SVG file, or they can be
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    constructed without a specific file to render and one can be supplied later. The load()
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    functions provide two different ways to load an SVG file: they accept either the file name
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    of an SVG file or a QByteArray containing the serialized XML representation of an SVG file.
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    By default, the widget provides a size hint to reflect the size of the drawing that it
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    displays. If no data has been loaded, the widget provides the default QWidget size hint.
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    Subclass this class and reimplement sizeHint() if you need to customize this behavior.
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    \sa QSvgRenderer, {QtSvg Module}, QPicture
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*/
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class QSvgWidgetPrivate : public QWidgetPrivate
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{
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    Q_DECLARE_PUBLIC(QSvgWidget)
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public:
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    QSvgRenderer *renderer;
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};
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/*!
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    Constructs a new SVG display widget with the given \a parent.
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*/
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QSvgWidget::QSvgWidget(QWidget *parent)
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    : QWidget(*new QSvgWidgetPrivate, parent, 0)
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{
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    d_func()->renderer = new QSvgRenderer(this);
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    QObject::connect(d_func()->renderer, SIGNAL(repaintNeeded()),
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                     this, SLOT(update()));
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}
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/*!
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    Constructs a new SVG display widget with the given \a parent and loads the contents
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    of the specified \a file.
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*/
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QSvgWidget::QSvgWidget(const QString &file, QWidget *parent)
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    : QWidget(*new QSvgWidgetPrivate, parent, 0)
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{
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    d_func()->renderer = new QSvgRenderer(file, this);
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    QObject::connect(d_func()->renderer, SIGNAL(repaintNeeded()),
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                     this, SLOT(update()));
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}
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/*!
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    Destroys the widget.
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*/
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QSvgWidget::~QSvgWidget()
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{
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}
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/*!
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    Returns the renderer used to display the contents of the widget.
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*/
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QSvgRenderer * QSvgWidget::renderer() const
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{
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    Q_D(const QSvgWidget);
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    return d->renderer;
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}
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/*!
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    \reimp
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*/
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QSize QSvgWidget::sizeHint() const
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{
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    Q_D(const QSvgWidget);
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    if (d->renderer->isValid())
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        return d->renderer->defaultSize();
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    else
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        return QSize(128, 64);
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}
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/*!
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    \reimp
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*/
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void QSvgWidget::paintEvent(QPaintEvent *)
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{
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    Q_D(QSvgWidget);
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    QPainter p(this);
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    d->renderer->render(&p);
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}
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/*!
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    Loads the contents of the specified SVG \a file and updates the widget.
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*/
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void QSvgWidget::load(const QString &file)
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{
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    Q_D(const QSvgWidget);
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    d->renderer->load(file);
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}
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/*!
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    Loads the specified SVG format \a contents and updates the widget.
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*/
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void QSvgWidget::load(const QByteArray &contents)
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{
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    Q_D(const QSvgWidget);
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    d->renderer->load(contents);
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}
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QT_END_NAMESPACE
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#endif // QT_NO_SVGWIDGET