54 lines
1.4 KiB
C++
54 lines
1.4 KiB
C++
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#include "XNCustomPlot.h"
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#include <QMouseEvent>
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#include <QContextMenuEvent>
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#include <QWheelEvent>
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XNCustomPlot::XNCustomPlot(QWidget *parent)
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: QCustomPlot(parent), m_yAxisUserScaled(false), m_isInternalChange(false)
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{
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// 使用旧式的信号槽连接语法
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connect(yAxis, SIGNAL(rangeChanged(QCPRange)), this, SLOT(onYAxisRangeChanged(QCPRange)));
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}
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void XNCustomPlot::mousePressEvent(QMouseEvent *event)
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{
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// 首先处理基类的事件
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QCustomPlot::mousePressEvent(event);
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// 发出自定义信号
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emit mousePressed(event);
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// 处理右键菜单
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if (event->button() == Qt::RightButton) {
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emit customContextMenuRequested(event->pos());
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}
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}
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void XNCustomPlot::mouseReleaseEvent(QMouseEvent *event)
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{
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QCustomPlot::mouseReleaseEvent(event);
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// 如果用户通过鼠标调整了Y轴范围
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if (yAxis->selectedParts().testFlag(QCPAxis::spAxis)) {
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m_yAxisUserScaled = true;
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}
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}
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void XNCustomPlot::wheelEvent(QWheelEvent *event)
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{
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// 处理鼠标滚轮事件
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QCustomPlot::wheelEvent(event);
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// 如果用户使用滚轮缩放了Y轴
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if (yAxis->range() != yAxis->range()) { // 范围发生了变化
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m_yAxisUserScaled = true;
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}
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}
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void XNCustomPlot::onYAxisRangeChanged(const QCPRange &range)
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{
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// 如果Y轴范围发生了变化，则设置Y轴被用户缩放
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if (!m_isInternalChange) {
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m_yAxisUserScaled = true;
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}
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}
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