File indexing completed on 2024-04-21 07:27:35

 /*
     SPDX-FileCopyrightText: 2007 Carsten Niehaus <cniehaus@kde.org>
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 
 #include "isotopeview.h"
 
 #include "isotopescene.h"
 #include "prefs.h"
 
 IsotopeView::IsotopeView(QWidget *parent)
     : QGraphicsView(parent)
 {
     m_scene = new IsotopeScene(this, Prefs::isotopeTableMode());
     m_zoomLevel = 1.0;
     initialize();
 }
 
 IsotopeView::IsotopeView(QWidget *parent, int mode)
     : QGraphicsView(parent)
 {
     m_scene = new IsotopeScene(this, mode);
     m_zoomLevel = 1.0;
     initialize();
 }
 
 void IsotopeView::initialize()
 {
     setScene(m_scene);
     setSceneRect(m_scene->itemsBoundingRect());
     // Zoom in a bit
     setZoom(0.3);
     // Makes sure that you always zoom to the mouse if you use the scroll wheel
     setTransformationAnchor(QGraphicsView::AnchorUnderMouse);
     QPolygonF visibleSceneRect = mapToScene(viewport()->rect());
     Q_EMIT visibleSceneRectChanged(visibleSceneRect);
 }
 
 IsotopeView::~IsotopeView()
 {
     delete scene();
 }
 
 void IsotopeView::resizeEvent(QResizeEvent *event)
 {
     Q_UNUSED(event)
     if (!isInteractive()) {
         qreal scale = qMin(qreal(viewport()->width()) / sceneRect().width(), qreal(viewport()->height()) / sceneRect().height());
         setTransform(QTransform::fromScale(scale, scale));
     }
 }
 
 void IsotopeView::mouseMoveEvent(QMouseEvent *event)
 {
     QPolygonF visibleSceneRect = mapToScene(viewport()->rect());
     Q_EMIT visibleSceneRectChanged(visibleSceneRect);
 
     QGraphicsView::mouseMoveEvent(event);
 }
 
 void IsotopeView::wheelEvent(QWheelEvent *event)
 {
     if (!isInteractive()) {
         event->accept();
         return;
     }
 
     double oldZoomLevel = m_zoomLevel;
     double factor = event->angleDelta().y() / 1000.0;
     m_zoomLevel = oldZoomLevel + oldZoomLevel * factor;
 
     if (m_zoomLevel < 0.3) {
         m_zoomLevel = 0.3;
     } else if (m_zoomLevel > 10.0) {
         m_zoomLevel = 10.0;
     }
 
     if (oldZoomLevel != m_zoomLevel) {
         factor = m_zoomLevel / oldZoomLevel;
         scale(factor, factor);
         Q_EMIT zoomLevelChanged(m_zoomLevel);
     }
     QPolygonF visibleSceneRect = mapToScene(viewport()->rect());
     Q_EMIT visibleSceneRectChanged(visibleSceneRect);
 
     event->accept();
 }
 
 void IsotopeView::setZoom(double zoom)
 {
     double oldZoomLevel = m_zoomLevel;
     double factor;
 
     m_zoomLevel = zoom;
 
     if (m_zoomLevel < 0.3 && isInteractive()) {
         m_zoomLevel = 0.3;
     } else if (m_zoomLevel > 10.0 && isInteractive()) {
         m_zoomLevel = 10.0;
     }
 
     factor = m_zoomLevel / oldZoomLevel;
     scale(factor, factor);
     Q_EMIT zoomLevelChanged(m_zoomLevel);
     QPolygonF visibleSceneRect = mapToScene(viewport()->rect());
     Q_EMIT visibleSceneRectChanged(visibleSceneRect);
 }
 
 int IsotopeView::mode() const
 {
     return m_scene->mode();
 }
 
 void IsotopeView::setMode(int mode)
 {
     m_scene->setMode(mode);
     initialize();
 }
 
 #include "moc_isotopeview.cpp"