Qt 4.8: embeddedsvgviewer.h Example File (demos/embedded/embeddedsvgviewer/embeddedsvgviewer.h)

Qt Reference Documentation

# embeddedsvgviewer.h Example File

demos/embedded/embeddedsvgviewer/embeddedsvgviewer.h

     /****************************************************************************
     **
     ** Copyright (C) 2012 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