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++ // Copyright (C) 2016 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
++
++ #include <QPainter>
++ #include <QApplication>
++ #include <QMouseEvent>
++ #include <QSlider>
++ #include <QPushButton>
++ #include <QSvgRenderer>
++
++ #include "embeddedsvgviewer.h"
++
++ EmbeddedSvgViewer::EmbeddedSvgViewer(const QString &filePath)
++ {
++ qApp->setStyleSheet(" QSlider:vertical { width: 50px; } \
++ QSlider::groove:vertical { border: 1px solid black; border-radius: 3px; width: 6px; } \
++ QSlider::handle:vertical { height: 25px; margin: 0 -22px; image: url(':/files/v-slider-handle.svg'); } \
++ ");
++
++ m_renderer = new QSvgRenderer(filePath);
++ m_imageSize = m_renderer->viewBox().size();
++
++ m_viewBoxCenter = (QPointF(m_imageSize.width() / qreal(2.0), m_imageSize.height() / qreal(2.0)));
++
++ m_zoomSlider = new QSlider(Qt::Vertical, this);
++ m_zoomSlider->setMaximum(150);
++ m_zoomSlider->setMinimum(1);
++
++ connect(m_zoomSlider, &QSlider::valueChanged, this, &EmbeddedSvgViewer::setZoom);
++ m_zoomSlider->setValue(100);
++
++ m_quitButton = new QPushButton("Quit", this);
++
++ connect(m_quitButton, &QPushButton::pressed, QApplication::instance(), &QApplication::quit);
++
++ if (m_renderer->animated())
++ connect(m_renderer, &QSvgRenderer::repaintNeeded,
++ this, qOverload<>(&EmbeddedSvgViewer::update));
++
++ }
++
++ void EmbeddedSvgViewer::paintEvent(QPaintEvent *event)
++ {
++ Q_UNUSED(event);
++ QPainter painter(this);
++ m_renderer->setViewBox(m_viewBox);
++ m_renderer->render(&painter);
++ }
++
++
++ void EmbeddedSvgViewer::mouseMoveEvent ( QMouseEvent * event )
++ {
++ int incX = int((event->globalPosition().toPoint().x() - m_mousePress.x()) * m_imageScale);
++ int incY = int((event->globalPosition().toPoint().y() - m_mousePress.y()) * m_imageScale);
++
++ QPointF newCenter;
++ newCenter.setX(m_viewBoxCenterOnMousePress.x() - incX);
++ newCenter.setY(m_viewBoxCenterOnMousePress.y() - incY);
++
++ QRectF newViewBox = getViewBox(newCenter);
++
++
++ // Do a bounded move on the horizontal:
++ if ( (newViewBox.left() >= m_viewBoxBounds.left()) &&
++ (newViewBox.right() <= m_viewBoxBounds.right()) )
++ {
++ m_viewBoxCenter.setX(newCenter.x());
++ m_viewBox.setLeft(newViewBox.left());
++ m_viewBox.setRight(newViewBox.right());
++ }
++
++ // do a bounded move on the vertical:
++ if ( (newViewBox.top() >= m_viewBoxBounds.top()) &&
++ (newViewBox.bottom() <= m_viewBoxBounds.bottom()) )
++ {
++ m_viewBoxCenter.setY(newCenter.y());
++ m_viewBox.setTop(newViewBox.top());
++ m_viewBox.setBottom(newViewBox.bottom());
++ }
++
++ update();
++ }
++
++ void EmbeddedSvgViewer::mousePressEvent ( QMouseEvent * event )
++ {
++ m_viewBoxCenterOnMousePress = m_viewBoxCenter;
++ m_mousePress = event->globalPosition().toPoint();
++ }
++
++
++ QRectF EmbeddedSvgViewer::getViewBox(QPointF viewBoxCenter)
++ {
++ QRectF result;
++ result.setLeft(viewBoxCenter.x() - (m_viewBoxSize.width() / 2));
++ result.setTop(viewBoxCenter.y() - (m_viewBoxSize.height() / 2));
++ result.setRight(viewBoxCenter.x() + (m_viewBoxSize.width() / 2));
++ result.setBottom(viewBoxCenter.y() + (m_viewBoxSize.height() / 2));
++ return result;
++ }
++
++ void EmbeddedSvgViewer::updateImageScale()
++ {
++ m_imageScale = qMax( (qreal)m_imageSize.width() / (qreal)width(),
++ (qreal)m_imageSize.height() / (qreal)height())*m_zoomLevel;
++
++ m_viewBoxSize.setWidth((qreal)width() * m_imageScale);
++ m_viewBoxSize.setHeight((qreal)height() * m_imageScale);
++ }
++
++
++ void EmbeddedSvgViewer::resizeEvent ( QResizeEvent * /* event */ )
++ {
++ qreal origZoom = m_zoomLevel;
++
++ // Get the new bounds:
++ m_zoomLevel = 1.0;
++ updateImageScale();
++ m_viewBoxBounds = getViewBox(QPointF(m_imageSize.width() / 2.0, m_imageSize.height() / 2.0));
++
++ m_zoomLevel = origZoom;
++ updateImageScale();
++ m_viewBox = getViewBox(m_viewBoxCenter);
++
++ QRect sliderRect;
++ sliderRect.setLeft(width() - m_zoomSlider->sizeHint().width());
++ sliderRect.setRight(width());
++ sliderRect.setTop(height()/4);
++ sliderRect.setBottom(height() - (height()/4));
++ m_zoomSlider->setGeometry(sliderRect);
++ }
++
++
++ void EmbeddedSvgViewer::setZoom(int newZoom)
++ {
++ m_zoomLevel = qreal(newZoom) / qreal(100);
++
++ updateImageScale();
++ m_viewBox = getViewBox(m_viewBoxCenter);
++
++ update();
++ }
++
++
++
++
++