为什么总是在mouseDoubleClickEvent之前调用mousePressEvent

问题描述

请考虑以下代码:

#include <QWidget>
#include <iostream>
#include <QApplication>

class Widget : public QWidget
{
public:
    void mousePressEvent(QMouseEvent* event)
    {
        std::cout << "mousePressEvent" < std::endl;
    }

    void mouseDoubleClickEvent(QMouseEvent* event)
    {
        std::cout << "mouseDoubleClickEvent" << std::endl;
    }
};

int main(int argc, char** argv)
{
    QApplication app(argc, argv);
    Widget w;
    w.show();
    return app.exec();
}

每次我处理双击时，输出为:

Every time I process double click, the output is:

mousePressEvent
mouseDoubleClickEvent

这意味着Qt总是在按下一次按键后立即调用mousePressEvent，而无需等待第二次按下按键.有没有办法关闭此选项，以便在双击的情况下不执行mousePressEvent调用.

This means Qt always call mousePressEvent as soon as one press proceed without waiting the second press. Is there a way to turn off this option, so that no mousePressEvent call will perform in case of double-click.

推荐答案

我将在等于QApplication::doubleClickInterval()值的时间段内绕过单击事件的处理(使用QTimer).如果在此期间未发生双击，则应处理单击"，否则应处理双击.

I would bypass the handling of single click event (using a QTimer) by the period of time equal to the QApplication::doubleClickInterval() value. If double click is not happened during that time, I should handle "single click", otherwise the double click should be processed.

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