author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Fri, 19 Feb 2010 23:40:16 +0200 | |
branch | RCL_3 |
changeset 4 | 3b1da2848fc7 |
parent 0 | 1918ee327afb |
permissions | -rw-r--r-- |
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/**************************************************************************** |
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** |
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3b1da2848fc7
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
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diff
changeset
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). |
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** All rights reserved. |
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** Contact: Nokia Corporation (qt-info@nokia.com) |
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** |
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** This file is part of the demonstration applications of the Qt Toolkit. |
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** |
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** $QT_BEGIN_LICENSE:LGPL$ |
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** No Commercial Usage |
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** This file contains pre-release code and may not be distributed. |
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** You may use this file in accordance with the terms and conditions |
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** contained in the Technology Preview License Agreement accompanying |
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** this package. |
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** |
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** GNU Lesser General Public License Usage |
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** Alternatively, this file may be used under the terms of the GNU Lesser |
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** General Public License version 2.1 as published by the Free Software |
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** Foundation and appearing in the file LICENSE.LGPL included in the |
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** packaging of this file. Please review the following information to |
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** ensure the GNU Lesser General Public License version 2.1 requirements |
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. |
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** |
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** In addition, as a special exception, Nokia gives you certain additional |
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** rights. These rights are described in the Nokia Qt LGPL Exception |
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. |
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** |
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** If you have questions regarding the use of this file, please contact |
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** Nokia at qt-info@nokia.com. |
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** |
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** |
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** |
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** |
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** |
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** |
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** |
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** |
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** $QT_END_LICENSE$ |
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** |
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****************************************************************************/ |
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#include <QPainter> |
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#include <QApplication> |
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#include "embeddedsvgviewer.h" |
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EmbeddedSvgViewer::EmbeddedSvgViewer(const QString &filePath) |
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{ |
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qApp->setStyleSheet(" QSlider:vertical { width: 50px; } \ |
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QSlider::groove:vertical { border: 1px solid black; border-radius: 3px; width: 6px; } \ |
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QSlider::handle:vertical { height: 25px; margin: 0 -22px; image: url(':/files/v-slider-handle.svg'); } \ |
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"); |
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m_renderer = new QSvgRenderer(filePath); |
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m_imageSize = m_renderer->viewBox().size(); |
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m_viewBoxCenter = (QPointF(m_imageSize.width() / qreal(2.0), m_imageSize.height() / qreal(2.0))); |
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m_zoomSlider = new QSlider(Qt::Vertical, this); |
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m_zoomSlider->setMaximum(150); |
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m_zoomSlider->setMinimum(1); |
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connect(m_zoomSlider, SIGNAL(valueChanged(int)), this, SLOT(setZoom(int))); |
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m_zoomSlider->setValue(100); |
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m_quitButton = new QPushButton("Quit", this); |
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connect(m_quitButton, SIGNAL(pressed()), QApplication::instance(), SLOT(quit())); |
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if (m_renderer->animated()) |
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connect(m_renderer, SIGNAL(repaintNeeded()), this, SLOT(update())); |
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} |
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void EmbeddedSvgViewer::paintEvent(QPaintEvent *event) |
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{ |
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Q_UNUSED(event) |
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QPainter painter(this); |
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m_renderer->setViewBox(m_viewBox); |
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m_renderer->render(&painter); |
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} |
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void EmbeddedSvgViewer::mouseMoveEvent ( QMouseEvent * event ) |
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{ |
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int incX = int((event->globalX() - m_mousePress.x()) * m_imageScale); |
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int incY = int((event->globalY() - m_mousePress.y()) * m_imageScale); |
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QPointF newCenter; |
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newCenter.setX(m_viewBoxCenterOnMousePress.x() - incX); |
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newCenter.setY(m_viewBoxCenterOnMousePress.y() - incY); |
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QRectF newViewBox = getViewBox(newCenter); |
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// Do a bounded move on the horizontal: |
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if ( (newViewBox.left() >= m_viewBoxBounds.left()) && |
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(newViewBox.right() <= m_viewBoxBounds.right()) ) |
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{ |
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m_viewBoxCenter.setX(newCenter.x()); |
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m_viewBox.setLeft(newViewBox.left()); |
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m_viewBox.setRight(newViewBox.right()); |
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} |
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// do a bounded move on the vertical: |
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if ( (newViewBox.top() >= m_viewBoxBounds.top()) && |
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(newViewBox.bottom() <= m_viewBoxBounds.bottom()) ) |
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{ |
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m_viewBoxCenter.setY(newCenter.y()); |
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m_viewBox.setTop(newViewBox.top()); |
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m_viewBox.setBottom(newViewBox.bottom()); |
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} |
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update(); |
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} |
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void EmbeddedSvgViewer::mousePressEvent ( QMouseEvent * event ) |
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{ |
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m_viewBoxCenterOnMousePress = m_viewBoxCenter; |
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m_mousePress = event->globalPos(); |
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} |
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QRectF EmbeddedSvgViewer::getViewBox(QPointF viewBoxCenter) |
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{ |
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QRectF result; |
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result.setLeft(viewBoxCenter.x() - (m_viewBoxSize.width() / 2)); |
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result.setTop(viewBoxCenter.y() - (m_viewBoxSize.height() / 2)); |
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result.setRight(viewBoxCenter.x() + (m_viewBoxSize.width() / 2)); |
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result.setBottom(viewBoxCenter.y() + (m_viewBoxSize.height() / 2)); |
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return result; |
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} |
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void EmbeddedSvgViewer::updateImageScale() |
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{ |
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m_imageScale = qMax( (qreal)m_imageSize.width() / (qreal)width(), |
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(qreal)m_imageSize.height() / (qreal)height())*m_zoomLevel; |
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m_viewBoxSize.setWidth((qreal)width() * m_imageScale); |
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m_viewBoxSize.setHeight((qreal)height() * m_imageScale); |
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} |
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void EmbeddedSvgViewer::resizeEvent ( QResizeEvent * /* event */ ) |
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{ |
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qreal origZoom = m_zoomLevel; |
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// Get the new bounds: |
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m_zoomLevel = 1.0; |
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updateImageScale(); |
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m_viewBoxBounds = getViewBox(QPointF(m_imageSize.width() / 2.0, m_imageSize.height() / 2.0)); |
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m_zoomLevel = origZoom; |
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updateImageScale(); |
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m_viewBox = getViewBox(m_viewBoxCenter); |
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QRect sliderRect; |
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sliderRect.setLeft(width() - m_zoomSlider->sizeHint().width()); |
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sliderRect.setRight(width()); |
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sliderRect.setTop(height()/4); |
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sliderRect.setBottom(height() - (height()/4)); |
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m_zoomSlider->setGeometry(sliderRect); |
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} |
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void EmbeddedSvgViewer::setZoom(int newZoom) |
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{ |
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m_zoomLevel = qreal(newZoom) / qreal(100); |
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updateImageScale(); |
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m_viewBox = getViewBox(m_viewBoxCenter); |
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update(); |
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} |
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