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-/****************************************************************************
-**
-** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
-** Contact: http://www.qt-project.org/legal
-**
-** This file is part of the examples of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:BSD$
-** You may use this file under the terms of the BSD license as follows:
-**
-** "Redistribution and use in source and binary forms, with or without
-** modification, are permitted provided that the following conditions are
-** met:
-** * Redistributions of source code must retain the above copyright
-** notice, this list of conditions and the following disclaimer.
-** * Redistributions in binary form must reproduce the above copyright
-** notice, this list of conditions and the following disclaimer in
-** the documentation and/or other materials provided with the
-** distribution.
-** * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
-** of its contributors may be used to endorse or promote products derived
-** from this software without specific prior written permission.
-**
-**
-** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-#include "svgview.h"
-
-#include <QFile>
-#include <QWheelEvent>
-#include <QMouseEvent>
-#include <QGraphicsRectItem>
-#include <QGraphicsSvgItem>
-#include <QGraphicsWebView>
-#include <QPaintEvent>
-#include <qmath.h>
-#include <unistd.h>
-
-#ifndef QT_NO_OPENGL
-#include <QGLWidget>
-#endif
-
-SvgView::SvgView(QWidget *parent)
- : QGraphicsView(parent)
- , m_renderer(Native)
- , m_svgItem(0)
- , m_webview(0)
- , m_backgroundItem(0)
- , m_outlineItem(0)
-{
- setScene(new QGraphicsScene(this));
- setTransformationAnchor(AnchorUnderMouse);
- setDragMode(ScrollHandDrag);
- setViewportUpdateMode(FullViewportUpdate);
-
- // 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();
-
- fn = file.fileName();
- if (fn[0] != '/') {
- char cwd_buffer[4096];
- if (getcwd(cwd_buffer, 4096) != NULL)
- fn = cwd_buffer + ("/" + fn);
- }
-
- bool drawBackground = (m_backgroundItem ? m_backgroundItem->isVisible() : false);
- bool drawOutline = (m_outlineItem ? m_outlineItem->isVisible() : true);
- bool useWebview = (m_webview ? m_webview->isVisible() : false);
-
- s->clear();
- resetTransform();
-
- m_svgItem = new QGraphicsSvgItem(file.fileName());
- m_svgItem->setFlags(QGraphicsItem::ItemClipsToShape);
- m_svgItem->setCacheMode(QGraphicsItem::NoCache);
- m_svgItem->setVisible(!useWebview);
- m_svgItem->setZValue(1);
- s->addItem(m_svgItem);
-
- if (useWebview) {
- m_webview = new QGraphicsWebView();
- m_webview->load(QUrl::fromLocalFile(fn));
- m_webview->setResizesToContents(true);
- m_webview->setZoomFactor(0.75);
- m_webview->setVisible(useWebview);
- m_webview->setZValue(1);
- s->addItem(m_webview);
- } else
- m_webview = NULL;
-
- m_backgroundItem = new QGraphicsRectItem(m_svgItem->boundingRect());
- m_backgroundItem->setBrush(Qt::white);
- m_backgroundItem->setPen(Qt::NoPen);
- m_backgroundItem->setVisible(drawBackground);
- m_backgroundItem->setZValue(0);
- s->addItem(m_backgroundItem);
-
- 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(2);
- 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::setViewInteractive(bool enable)
-{
- if (!m_svgItem)
- return;
- if (!m_webview) {
- m_webview = new QGraphicsWebView();
- m_webview->load(QUrl::fromLocalFile(fn));
- m_webview->setResizesToContents(true);
- m_webview->setZoomFactor(0.75);
- m_webview->setVisible(false);
- m_webview->setZValue(1);
- m_svgItem->scene()->addItem(m_webview);
- }
- m_svgItem->setVisible(!enable);
- m_webview->setVisible(enable);
-}
-
-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();
-}
-
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