Qt3学习使用事件过滤器（二）

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已于 2025-02-12 10:50:59 修改 · 377 阅读

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#学习 #c++

于 2025-01-18 15:24:40 首次发布

上一篇我们根据实际使用提出了事件过滤器的需求，那么现在就部署吧，首先

#include "mycapture.h"
#include <qapplication.h>
#include <qpainter.h>
#include <qstring.h>
#include <qtimer.h>
#include <chrono>


ScreenCaptureWidget::ScreenCaptureWidget(QWidget* parent) : QWidget(parent)
{
    // 确保接收鼠标事件
    setMouseTracking(true);
    m_lastClickTime = 0;
    m_clickCount = 0;
    m_lastRightClickTime = 0;
    m_rightClickCount = 0;
      m_clicknum = 0;
}


bool ScreenCaptureWidget::eventFilter(QObject *o, QEvent *e)
{
    if (!o ||!e)
        return true;
    

    if (o == this && e->type() == QEvent::MouseButtonPress)
    {
        
        int interval = QApplication::doubleClickInterval();
        QMouseEvent *mouseEvent = static_cast<QMouseEvent *>(e);
        if (mouseEvent->button() == Qt::LeftButton)
        {
            
            auto currentTime = std::chrono::duration_cast<std::chrono::milliseconds>(std::chrono::system_clock::now().time_since_epoch()).count();
            long long atime = currentTime - static_cast<long long>(m_lastClickTime);
            if (currentTime - static_cast<long long>(m_lastClickTime) < static_cast<long long>(QApplication::doubleClickInterval()))
            {
                qDebug("the mouse default interval (%d).", QApplication::doubleClickInterval());
                m_clickCount++;
            }
            else
            {
                m_clickCount = 1;
            }
            m_lastClickTime = currentTime;
            m_clicknum++;
            qDebug("The mouse two interval (%lld) It is the (%d) times.", atime, m_clicknum); 
            if (m_clickCount == 1)
            {
                Q

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