mirror of https://github.com/qt/qtcharts.git
64 lines
1.3 KiB
C++
64 lines
1.3 KiB
C++
#include "chartwidget.h"
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#include <QMouseEvent>
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ChartWidget::ChartWidget(QWidget *parent)
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: QChartView(parent),
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m_rubberBand(QRubberBand::Rectangle,this)
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{
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}
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void ChartWidget::mousePressEvent(QMouseEvent *event)
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{
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if(event->button()!=Qt::LeftButton) return;
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int margin = this->margin();
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QRect rect(margin,margin,width()-2*margin,height()-2*margin);
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m_origin = event->pos();
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if (!rect.contains(m_origin)) return;
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m_rubberBand.setGeometry(QRect(m_origin, QSize()));
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m_rubberBand.show();
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event->accept();
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}
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void ChartWidget::mouseMoveEvent(QMouseEvent *event)
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{
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if(m_rubberBand.isVisible())
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m_rubberBand.setGeometry(QRect(m_origin, event->pos()).normalized());
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}
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void ChartWidget::mouseReleaseEvent(QMouseEvent *event)
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{
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if( event->button()==Qt::LeftButton && m_rubberBand.isVisible()) {
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m_rubberBand.hide();
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QRect rect = m_rubberBand.geometry();
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zoomIn(rect);
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event->accept();
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}
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if(event->button()==Qt::RightButton) {
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zoomOut();
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}
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}
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void ChartWidget::keyPressEvent(QKeyEvent *event)
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{
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switch (event->key()) {
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case Qt::Key_Plus:
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zoomIn();
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break;
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case Qt::Key_Minus:
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zoomOut();
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break;
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default:
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QGraphicsView::keyPressEvent(event);
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break;
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}
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}
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