src/svg/qsvgwidget.cpp
changeset 0 1918ee327afb
child 4 3b1da2848fc7
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/svg/qsvgwidget.cpp	Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,173 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtSvg 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 "qsvgwidget.h"
+
+#ifndef QT_NO_SVGWIDGET
+
+#include "qsvgrenderer.h"
+
+#include "qpainter.h"
+#include "private/qwidget_p.h"
+
+QT_BEGIN_NAMESPACE
+
+/*!
+    \class QSvgWidget
+    \ingroup painting
+
+    \brief The QSvgWidget class provides a widget that is used to display the contents of
+    Scalable Vector Graphics (SVG) files.
+    \since 4.1
+
+    This class enables developers to display SVG drawings alongside standard widgets, and
+    is used in much the same way as QLabel is used for displaying text and bitmap images.
+
+    Since QSvgWidget is a subclass of QWidget, SVG drawings are rendered using the properties
+    of the display. More control can be exercised over the rendering process with the
+    QSvgRenderer class, as this can be used to paint onto other paint devices, such as QImage
+    and QGLWidget. The renderer used by the widget can be obtained with the renderer()
+    function.
+
+    Each QSvgWidget can be constructed with the file name of a SVG file, or they can be
+    constructed without a specific file to render and one can be supplied later. The load()
+    functions provide two different ways to load an SVG file: they accept either the file name
+    of an SVG file or a QByteArray containing the serialized XML representation of an SVG file.
+
+    By default, the widget provides a size hint to reflect the size of the drawing that it
+    displays. If no data has been loaded, the widget provides the default QWidget size hint.
+    Subclass this class and reimplement sizeHint() if you need to customize this behavior.
+
+    \sa QSvgRenderer, {QtSvg Module}, QPicture
+*/
+
+class QSvgWidgetPrivate : public QWidgetPrivate
+{
+    Q_DECLARE_PUBLIC(QSvgWidget)
+public:
+    QSvgRenderer *renderer;
+};
+
+/*!
+    Constructs a new SVG display widget with the given \a parent.
+*/
+QSvgWidget::QSvgWidget(QWidget *parent)
+    : QWidget(*new QSvgWidgetPrivate, parent, 0)
+{
+    d_func()->renderer = new QSvgRenderer(this);
+    QObject::connect(d_func()->renderer, SIGNAL(repaintNeeded()),
+                     this, SLOT(update()));
+}
+
+/*!
+    Constructs a new SVG display widget with the given \a parent and loads the contents
+    of the specified \a file.
+*/
+QSvgWidget::QSvgWidget(const QString &file, QWidget *parent)
+    : QWidget(*new QSvgWidgetPrivate, parent, 0)
+{
+    d_func()->renderer = new QSvgRenderer(file, this);
+    QObject::connect(d_func()->renderer, SIGNAL(repaintNeeded()),
+                     this, SLOT(update()));
+}
+
+/*!
+    Destroys the widget.
+*/
+QSvgWidget::~QSvgWidget()
+{
+
+}
+
+/*!
+    Returns the renderer used to display the contents of the widget.
+*/
+QSvgRenderer * QSvgWidget::renderer() const
+{
+    Q_D(const QSvgWidget);
+    return d->renderer;
+}
+
+
+/*!
+    \reimp
+*/
+QSize QSvgWidget::sizeHint() const
+{
+    Q_D(const QSvgWidget);
+    if (d->renderer->isValid())
+        return d->renderer->defaultSize();
+    else
+        return QSize(128, 64);
+}
+
+
+/*!
+    \reimp
+*/
+void QSvgWidget::paintEvent(QPaintEvent *)
+{
+    Q_D(QSvgWidget);
+    QPainter p(this);
+    d->renderer->render(&p);
+}
+
+/*!
+    Loads the contents of the specified SVG \a file and updates the widget.
+*/
+void QSvgWidget::load(const QString &file)
+{
+    Q_D(const QSvgWidget);
+    d->renderer->load(file);
+}
+
+/*!
+    Loads the specified SVG format \a contents and updates the widget.
+*/
+void QSvgWidget::load(const QByteArray &contents)
+{
+    Q_D(const QSvgWidget);
+    d->renderer->load(contents);
+}
+
+QT_END_NAMESPACE
+
+#endif // QT_NO_SVGWIDGET