QLabel实现鼠标单击，双击

头文件—LabelRealClick.h

#ifndef LABELREALCLICK_H
#define LABELREALCLICK_H

#include <QLabel>
#include <QWidget>
#include <QTimer>
#include <QMouseEvent>
#include <QDebug>

#define cout qDebug() << "[" << __FILE__ << __LINE__ << "]:"

class LabelRealClick:public QLabel
{
    Q_OBJECT
public:
    LabelRealClick(QWidget *pParent = nullptr);

protected:
    virtual void mousePressEvent(QMouseEvent *event) override;
    virtual void mouseReleaseEvent(QMouseEvent *event) override;
    virtual void mouseDoubleClickEvent(QMouseEvent *event) override;

signals:
   void RClicked();
   void DoubleClicked();
   void LClicked();

public slots:
    void OnTimeout();

private:
    QTimer *m_timer;
    bool m_isLPressed;
};

#endif // LABELREALCLICK_H

CPP文件—LabelRealClick.cpp

#include "LabelRealClick.h"

LabelRealClick::LabelRealClick(QWidget *pParent):QLabel(pParent)
{
    this->m_timer = new QTimer(this);
    connect(m_timer, &QTimer::timeout, this, [=](){OnTimeout();} );
    m_isLPressed = false;

}

void LabelRealClick::mousePressEvent(QMouseEvent *event)
{
    if (event->button() == Qt::LeftButton)
    {
        m_isLPressed = true;
    }
}

void LabelRealClick::mouseReleaseEvent(QMouseEvent *event)
{
    if (event->button() == Qt::LeftButton)
    {
        if (m_isLPressed)
        {
           m_timer->start(180);
        }
        m_isLPressed = false;
    }
    else if (event->button() == Qt::RightButton)
    {
        emit RClicked();
        cout << "RClicked";
    }
}

void LabelRealClick::mouseDoubleClickEvent(QMouseEvent *event)
{
    if (event->button() == Qt::LeftButton)
    {
        m_timer->stop();
        emit DoubleClicked();
        cout << "DoubleClicked";
    }

}


void LabelRealClick::OnTimeout()
{

    m_timer->stop();
    emit LClicked();
    cout << "pressLeftClicked";
}

原文链接:
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本文链接：https://blog.csdn.net/weixin_43610939/article/details/112599178