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<pre> /****************************************************************************
**
** Copyright (C) 2005-2006 Trolltech ASA. All rights reserved.
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** This file is part of the example classes of the Qt Toolkit.
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#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);
QPainter p(&buffer);
p.setViewport(0, 0, width(), height());
p.eraseRect(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)
{
doc = new QSvgRenderer(file, this);
connect(doc, SIGNAL(repaintNeeded()),
this, SLOT(update()));
}
void SvgGLView::paintEvent(QPaintEvent *)
{
QPainter p(this);
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</pre>
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