Home · All Namespaces · All Classes · Main Classes · Grouped Classes · Modules · Functions

svgview.cpp Example File
painting/svgviewer/svgview.cpp

 /****************************************************************************
 **
 ** Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies).
 ** Contact: Qt Software Information ([email protected])
 **
 ** This file is part of the example classes of the Qt Toolkit.
 **
 ** Commercial Usage
 ** Licensees holding valid Qt Commercial licenses may use this file in
 ** accordance with the Qt Commercial License Agreement provided with the
 ** Software or, alternatively, in accordance with the terms contained in
 ** a written agreement between you and Nokia.
 **
 **
 ** GNU General Public License Usage
 ** Alternatively, this file may be used under the terms of the GNU
 ** General Public License versions 2.0 or 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 GNU General Public Licensing requirements will be met:
 ** http://www.fsf.org/licensing/licenses/info/GPLv2.html and
 ** http://www.gnu.org/copyleft/gpl.html.  In addition, as a special
 ** exception, Nokia gives you certain additional rights. These rights
 ** are described in the Nokia Qt GPL Exception version 1.3, included in
 ** the file GPL_EXCEPTION.txt in this package.
 **
 ** Qt for Windows(R) Licensees
 ** As a special exception, Nokia, as the sole copyright holder for Qt
 ** Designer, grants users of the Qt/Eclipse Integration plug-in the
 ** right for the Qt/Eclipse Integration to link to functionality
 ** provided by Qt Designer and its related libraries.
 **
 ** If you are unsure which license is appropriate for your use, please
 ** contact the sales department at [email protected].
 **
 ****************************************************************************/
 #include "svgview.h"

 #include <QSvgRenderer>

 #include <QApplication>
 #include <QPainter>
 #include <QImage>
 #include <QWheelEvent>
 #include <QtDebug>

 SvgRasterView::SvgRasterView(const QString &file, QWidget *parent)
     : QWidget(parent)
 {
     doc = new QSvgRenderer(file, this);
     connect(doc, SIGNAL(repaintNeeded()),
             this, SLOT(poluteImage()));
 }

 void SvgRasterView::paintEvent(QPaintEvent *)
 {
     if (buffer.size() != size() ||
         m_dirty) {
         buffer = QImage(size(), QImage::Format_ARGB32_Premultiplied);
         buffer.fill(0x0);
         QPainter p(&buffer);
         p.setViewport(0, 0, width(), height());
         doc->render(&p);
     }
     QPainter pt(this);
     pt.drawImage(0, 0, buffer);
 }

 QSize SvgRasterView::sizeHint() const
 {
     if (doc)
         return doc->defaultSize();
     return QWidget::sizeHint();
 }

 void SvgRasterView::poluteImage()
 {
     m_dirty = true;
     update();
 }

 void SvgRasterView::wheelEvent(QWheelEvent *e)
 {
     const double diff = 0.1;
     QSize size = doc->defaultSize();
     int width  = size.width();
     int height = size.height();
     if (e->delta() > 0) {
         width = int(this->width()+this->width()*diff);
         height = int(this->height()+this->height()*diff);
     } else {
         width  = int(this->width()-this->width()*diff);
         height = int(this->height()-this->height()*diff);
     }

     resize(width, height);
 }

 SvgNativeView::SvgNativeView(const QString &file, QWidget *parent)
     : QWidget(parent)
 {
     doc = new QSvgRenderer(file, this);
     connect(doc, SIGNAL(repaintNeeded()),
             this, SLOT(update()));
 }

 void SvgNativeView::paintEvent(QPaintEvent *)
 {
     QPainter p(this);
     p.setViewport(0, 0, width(), height());
     doc->render(&p);
 }

 QSize SvgNativeView::sizeHint() const
 {
     if (doc)
         return doc->defaultSize();
     return QWidget::sizeHint();
 }

 void SvgNativeView::wheelEvent(QWheelEvent *e)
 {
     const double diff = 0.1;
     QSize size = doc->defaultSize();
     int width  = size.width();
     int height = size.height();
     if (e->delta() > 0) {
         width = int(this->width()+this->width()*diff);
         height = int(this->height()+this->height()*diff);
     } else {
         width  = int(this->width()-this->width()*diff);
         height = int(this->height()-this->height()*diff);
     }
     resize(width, height);
 }

 #ifndef QT_NO_OPENGL
 SvgGLView::SvgGLView(const QString &file, QWidget *parent)
     : QGLWidget(QGLFormat(QGL::SampleBuffers), parent),
       highQualityAntialiasing(false)
 {
     doc = new QSvgRenderer(file, this);
     connect(doc, SIGNAL(repaintNeeded()),
             this, SLOT(update()));
 }

 void SvgGLView::setHighQualityAntialiasing(bool hq)
 {
     highQualityAntialiasing = hq;
     update();
 }

 void SvgGLView::paintEvent(QPaintEvent *)
 {
     QPainter p(this);
     p.setRenderHint(QPainter::HighQualityAntialiasing, highQualityAntialiasing);
     doc->render(&p);
 }

 QSize SvgGLView::sizeHint() const
 {
     if (doc)
         return doc->defaultSize();
     return QGLWidget::sizeHint();
 }

 void SvgGLView::wheelEvent(QWheelEvent *e)
 {
     const double diff = 0.1;
     QSize size = doc->defaultSize();
     int width  = size.width();
     int height = size.height();
     if (e->delta() > 0) {
         width = int(this->width()+this->width()*diff);
         height = int(this->height()+this->height()*diff);
     } else {
         width  = int(this->width()-this->width()*diff);
         height = int(this->height()-this->height()*diff);
     }
     resize(width, height);
 }
 #endif


Copyright © 2008 Nokia Trademarks
Qt 4.4.3