57 lines
1.8 KiB
C++
57 lines
1.8 KiB
C++
#include "ElaGraphicsView.h"
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#include <QEvent>
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#include <QScrollBar>
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#include <QWheelEvent>
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#include "private/ElaGraphicsViewPrivate.h"
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Q_PROPERTY_CREATE_Q_CPP(ElaGraphicsView, qreal, MaxTransform);
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Q_PROPERTY_CREATE_Q_CPP(ElaGraphicsView, qreal, MinTransform);
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ElaGraphicsView::ElaGraphicsView(QWidget *parent) : QGraphicsView(parent), d_ptr(new ElaGraphicsViewPrivate()) {
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Q_D(ElaGraphicsView);
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d->q_ptr = this;
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d->_pMaxTransform = 5;
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d->_pMinTransform = 0.15;
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d->_initStyle();
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setViewportUpdateMode(QGraphicsView::FullViewportUpdate);
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}
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ElaGraphicsView::ElaGraphicsView(QGraphicsScene *scene, QWidget *parent) : QGraphicsView(scene, parent), d_ptr(new ElaGraphicsViewPrivate()) {
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Q_D(ElaGraphicsView);
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d->q_ptr = this;
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d->_pMaxTransform = 5;
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d->_pMinTransform = 0.15;
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d->_initStyle();
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setViewportUpdateMode(QGraphicsView::FullViewportUpdate);
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}
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ElaGraphicsView::~ElaGraphicsView() {}
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void ElaGraphicsView::wheelEvent(QWheelEvent *event) {
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Q_D(ElaGraphicsView);
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if (event->modifiers() == Qt::CTRL) {
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// 放大
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if ((event->angleDelta().y() > 0) && transform().m11() <= d->_pMaxTransform) {
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this->scale(1.1, 1.1);
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} else if ((event->angleDelta().y() < 0) && transform().m11() >= d->_pMinTransform) {
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this->scale(1.0 / 1.1, 1.0 / 1.1);
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}
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return;
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}
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QGraphicsView::wheelEvent(event);
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}
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void ElaGraphicsView::keyPressEvent(QKeyEvent *event) {
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if (event->key() == Qt::Key_Alt) {
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setDragMode(QGraphicsView::ScrollHandDrag);
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}
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QGraphicsView::keyPressEvent(event);
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}
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void ElaGraphicsView::keyReleaseEvent(QKeyEvent *event) {
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if (event->key() == Qt::Key_Alt) {
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setDragMode(QGraphicsView::RubberBandDrag);
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}
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QGraphicsView::keyReleaseEvent(event);
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}
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