Long live Qt 4.5!

1 files changed, 188 insertions, 0 deletions

diff --git a/examples/painting/svgviewer/svgview.cpp b/examples/painting/svgviewer/svgview.cpp
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+/****************************************************************************
+**
+** 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();
+}
+