qwt_plot_scale_event_dispatcher.h

#ifndef QWTPLOTSCALEEVENTDISPATCHER_H
#define QWTPLOTSCALEEVENTDISPATCHER_H
#include <QObject>
#include "qwt_global.h"
#include "qwt_axis_id.h"
class QMouseEvent;
class QWheelEvent;
class QwtPlot;
class QwtScaleWidget;
class QWT_EXPORT QwtPlotScaleEventDispatcher : public QObject
{
    Q_OBJECT
    QWT_DECLARE_PRIVATE(QwtPlotScaleEventDispatcher)
public:
    explicit QwtPlotScaleEventDispatcher(QwtPlot* plot, QObject* par = nullptr);
    ~QwtPlotScaleEventDispatcher();
    bool isEnable() const;
    // 获取 QwtScaleWidget 对应的轴 ID
    static QwtAxisId findAxisIdByScaleWidget(const QwtPlot* plot, const QwtScaleWidget* scaleWidget);
public Q_SLOTS:
    void updateCache();
    // 设置可用
    void setEnable(bool on = true);
 
protected:
    virtual bool eventFilter(QObject* obj, QEvent* e) override;
    // 更新数据
    void rebuildCache();
    // 处理各种鼠标事件
    virtual bool handleMousePress(QwtPlot* bindPlot, QMouseEvent* e);
    virtual bool handleMouseMove(QwtPlot* bindPlot, QMouseEvent* e);
    virtual bool handleMouseRelease(QwtPlot* bindPlot, QMouseEvent* e);
    virtual bool handleWheelEvent(QwtPlot* bindPlot, QWheelEvent* e);
    // 查找应该处理事件的 scale widget
    QwtScaleWidget* findTargetOnScale(const QPoint& pos);
};
 
#endif  // QWTPLOTSCALEEVENTDISPATCHER_H