QT Mouse Double click events mousedoubleclickevent (qmouseevent* event)

Rewrite mousedoubleclickevent (qmouseevent event) *1. Example: Output "SSS" when double-clicking the window

/*widget.h*/  #ifndef widget_h  #define  widget_h   #include <qwidget>   #include <qdebug>  class Widget: public  qwidget{q_objectpublic : widget  (qwidget    * Parent=0 ); ~widget () {}protected ://Declaration void  mousedoubleclickevent  (qmouseevent*);}; #endif    

/*widget.cpp*/  #include   "widget.h"   #include  <  qmouseevent>  Widget ::widget  (Qwidget*  parent ): Qwidget ( parent ) {}//override  void  widget:: Mousedoubleclickevent  (Qmouseevent*  event) {Qdebug ( );  

/*main.cpp*/#include"widget.h"#include<QApplication>int main(int argc,char* argv[]){    QApplication app(argc,argv);    Widget    w;    w.show();    return app.exec();}

After I put the listwidget in the widget, I rewrote the mousedoubleclickeventin the widget class, but I don't know why I can't trigger it. Then rewrite the mousedoubleclickeventin the Listwidget class so that the mouse double-click event can be triggered.

2, left-click, right-click

?? The above default is the mouse around the key, you can also determine whether the left-click or right-click Trigger:

void Widget::mouseDoubleClickEvent(QMouseEvent* event){    if(event->button()==Qt::LeftButton)         qDebug("Left");    if(event->button()==Qt::RightButton)        qDebug("Right");}

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QT Mouse Double click events mousedoubleclickevent (qmouseevent* event)