File indexing completed on 2024-04-21 04:33:59

 /*
     SPDX-FileCopyrightText: 2022 Friedrich W. H. Kossebau <kossebau@kde.org>
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 
 #include "svgview.h"
 
 // Qt
 #include <QScrollBar>
 #include <QTransform>
 #include <QWheelEvent>
 
 constexpr qreal zoomFactor = 1.2;
 
 SvgView::SvgView(QGraphicsScene *scene, QWidget *parent)
     : QGraphicsView(scene, parent)
 {
     setFrameStyle(QFrame::NoFrame);
     setDragMode(QGraphicsView::ScrollHandDrag);
 }
 
 void SvgView::zoomIn()
 {
     setZoom(zoom() * zoomFactor);
 }
 
 void SvgView::zoomOut()
 {
     setZoom(zoom() / zoomFactor);
 }
 
 void SvgView::zoomActualSize()
 {
     setZoom(1.0);
 }
 
 void SvgView::setZoom(qreal value)
 {
     QTransform matrix;
     matrix.scale(value, value);
     setTransform(matrix);
 }
 
 void SvgView::setHorizontalScrollPosition(int horizontalScrollPosition)
 {
     horizontalScrollBar()->setValue(horizontalScrollPosition);
 }
 
 void SvgView::setVerticalScrollPosition(int verticalScrollPosition)
 {
     verticalScrollBar()->setValue(verticalScrollPosition);
 }
 
 int SvgView::horizontalScrollPosition() const
 {
     return horizontalScrollBar()->value();
 }
 
 int SvgView::verticalScrollPosition() const
 {
     return verticalScrollBar()->value();
 }
 
 qreal SvgView::zoom() const
 {
     return transform().m11();
 }
 
 void SvgView::wheelEvent(QWheelEvent *wheelEvent)
 {
     if (wheelEvent->modifiers() & Qt::ControlModifier) {
         const int delta = wheelEvent->angleDelta().y();
         if (delta > 0) {
             zoomIn();
         } else if (delta < 0) {
             zoomOut();
         }
 
         wheelEvent->accept();
         return;
     }
 
     QGraphicsView::wheelEvent(wheelEvent);
 }
 
 #include "moc_svgview.cpp"