embeddedsvgviewer.h Example File

 /****************************************************************************
 **
 ** 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 demonstration applications 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.
 **
 **
 **
 **
 **
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/

 #ifndef EMBEDDED_SVG_VIEWER_H
 #define EMBEDDED_SVG_VIEWER_H

 #include <QWidget>
 #include <QString>
 #include <QSvgRenderer>
 #include <QSize>
 #include <QMouseEvent>
 #include <QSlider>
 #include <QPushButton>

 class EmbeddedSvgViewer : public QWidget
 {
     Q_OBJECT
 public:
     EmbeddedSvgViewer(const QString& filePath);
     virtual void paintEvent(QPaintEvent *event);
     void mouseMoveEvent ( QMouseEvent * event );
     void mousePressEvent ( QMouseEvent * event );
     void resizeEvent ( QResizeEvent * event );

 public slots:
     void setZoom(int); // 100 <= newZoom < 0

 private:
     QSvgRenderer* m_renderer;
     QSlider* m_zoomSlider;
     QPushButton* m_quitButton;
     QSize m_imageSize;
     qreal m_zoomLevel;
     qreal m_imageScale; // How many Image coords 1 widget pixel is worth

     QRectF m_viewBox;
     QRectF m_viewBoxBounds;
     QSizeF m_viewBoxSize;
     QPointF m_viewBoxCenter;
     QPointF m_viewBoxCenterOnMousePress;
     QPoint m_mousePress;

     void updateImageScale();
     QRectF getViewBox(QPointF viewBoxCenter);
 };

 #endif