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Diffstat (limited to 'examples/painting/svgviewer/svgview.cpp')
| -rw-r--r-- | examples/painting/svgviewer/svgview.cpp | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/examples/painting/svgviewer/svgview.cpp b/examples/painting/svgviewer/svgview.cpp new file mode 100644 index 0000000..daf7bf0 --- /dev/null +++ b/examples/painting/svgviewer/svgview.cpp @@ -0,0 +1,188 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (qt-info@nokia.com) +** +** This file is part of the examples 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 either Technology Preview License Agreement or the +** Beta Release License Agreement. +** +** 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 1.0, 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. +** +** If you are unsure which license is appropriate for your use, please +** contact the sales department at qt-sales@nokia.com. +** $QT_END_LICENSE$ +** +****************************************************************************/ +#include "svgview.h" + +#include <QFile> +#include <QWheelEvent> +#include <QMouseEvent> +#include <QGraphicsRectItem> +#include <QGraphicsSvgItem> +#include <QPaintEvent> +#include <qmath.h> + +#ifndef QT_NO_OPENGL +#include <QGLWidget> +#endif + +SvgView::SvgView(QWidget *parent) + : QGraphicsView(parent) + , m_renderer(Native) + , m_svgItem(0) + , m_backgroundItem(0) + , m_outlineItem(0) +{ + setScene(new QGraphicsScene(this)); + setTransformationAnchor(AnchorUnderMouse); + setDragMode(ScrollHandDrag); + + // Prepare background check-board pattern + QPixmap tilePixmap(64, 64); + tilePixmap.fill(Qt::white); + QPainter tilePainter(&tilePixmap); + QColor color(220, 220, 220); + tilePainter.fillRect(0, 0, 32, 32, color); + tilePainter.fillRect(32, 32, 32, 32, color); + tilePainter.end(); + + setBackgroundBrush(tilePixmap); +} + +void SvgView::drawBackground(QPainter *p, const QRectF &) +{ + p->save(); + p->resetTransform(); + p->drawTiledPixmap(viewport()->rect(), backgroundBrush().texture()); + p->restore(); +} + +void SvgView::openFile(const QFile &file) +{ + if (!file.exists()) + return; + + QGraphicsScene *s = scene(); + + bool drawBackground = (m_backgroundItem ? m_backgroundItem->isVisible() : false); + bool drawOutline = (m_outlineItem ? m_outlineItem->isVisible() : true); + + s->clear(); + resetTransform(); + + m_svgItem = new QGraphicsSvgItem(file.fileName()); + m_svgItem->setFlags(QGraphicsItem::ItemClipsToShape); + m_svgItem->setCacheMode(QGraphicsItem::NoCache); + m_svgItem->setZValue(0); + + m_backgroundItem = new QGraphicsRectItem(m_svgItem->boundingRect()); + m_backgroundItem->setBrush(Qt::white); + m_backgroundItem->setPen(Qt::NoPen); + m_backgroundItem->setVisible(drawBackground); + m_backgroundItem->setZValue(-1); + + m_outlineItem = new QGraphicsRectItem(m_svgItem->boundingRect()); + QPen outline(Qt::black, 2, Qt::DashLine); + outline.setCosmetic(true); + m_outlineItem->setPen(outline); + m_outlineItem->setBrush(Qt::NoBrush); + m_outlineItem->setVisible(drawOutline); + m_outlineItem->setZValue(1); + + s->addItem(m_backgroundItem); + s->addItem(m_svgItem); + s->addItem(m_outlineItem); + + s->setSceneRect(m_outlineItem->boundingRect().adjusted(-10, -10, 10, 10)); +} + +void SvgView::setRenderer(RendererType type) +{ + m_renderer = type; + + if (m_renderer == OpenGL) { +#ifndef QT_NO_OPENGL + setViewport(new QGLWidget(QGLFormat(QGL::SampleBuffers))); +#endif + } else { + setViewport(new QWidget); + } +} + +void SvgView::setHighQualityAntialiasing(bool highQualityAntialiasing) +{ +#ifndef QT_NO_OPENGL + setRenderHint(QPainter::HighQualityAntialiasing, highQualityAntialiasing); +#else + Q_UNUSED(highQualityAntialiasing); +#endif +} + +void SvgView::setViewBackground(bool enable) +{ + if (!m_backgroundItem) + return; + + m_backgroundItem->setVisible(enable); +} + +void SvgView::setViewOutline(bool enable) +{ + if (!m_outlineItem) + return; + + m_outlineItem->setVisible(enable); +} + +void SvgView::paintEvent(QPaintEvent *event) +{ + if (m_renderer == Image) { + if (m_image.size() != viewport()->size()) { + m_image = QImage(viewport()->size(), QImage::Format_ARGB32_Premultiplied); + } + + QPainter imagePainter(&m_image); + QGraphicsView::render(&imagePainter); + imagePainter.end(); + + QPainter p(viewport()); + p.drawImage(0, 0, m_image); + + } else { + QGraphicsView::paintEvent(event); + } +} + +void SvgView::wheelEvent(QWheelEvent *event) +{ + qreal factor = qPow(1.2, event->delta() / 240.0); + scale(factor, factor); + event->accept(); +} + |