Making a clickable Label in Qt

It is hereby recorded for later use:

.cpp

#include"clicklabel.h"

QClickLabel::QClickLabel(QWidget *parent) :QLabel(parent) 

{

    init();

}

voidQClickLabel::init() 

{

    m_number =0; 

}

voidQClickLabel::setClieckNumber(intnum)  

{

    m_number = num;

    update();

}

voidQClickLabel::mousePressEvent(QMouseEvent*event)  

{

    if(event->button() ==Qt::LeftButton) 

    {

        emit clicked(m_number);

    }

    QLabel :: mousePressEvent (event); //Pass the event to the parent class for processing     

}

.h：

#include<QLabel> 

#include<QMouseEvent> 

class QClickLabel : public QLabel    

{

    Q_OBJECT

public:

    QClickLabel(QWidget* parent =0); 

    void init();

    void setClieckNumber(int num);

signals:

    void clicked(int num);

protected:

    voidmousePressEvent(QMouseEvent*event);  

private:

    intm_number; 

};

Call (part of code):

      for(int i =0;i<m_labelNum;i++)     

    {

        backLabel[i] =newQLabel(this);  

        backLabel[i]->setFixedSize(this->width() /m_labelNum-m_margin,this->height()-m_margin*m_labelNum);        

        backLabel[i]->setStyleSheet(backString);

        backLabel[i]->installEventFilter(this);

        if(i>0)
        {

            closeButton[i] =newQClickLabel(backLabel[i]);  

            closeButton[i]->setFixedSize(20,20); 

            closeButton[i]->move(backLabel[i]->width() -closeButton[i]->width(),0);  

            closeButton[i]->installEventFilter(this);

            closeButton[i]->setClieckNumber(i);

            connect(closeButton[i],SIGNAL(myclicked(int)),this,SLOT(slotCloseBackLabel(int)));   

        }
        }

Among them, closeButton[i] is of type clickLabel. It goes without saying how to define it. The declaration is as follows:

QClickLabel *closeButton[4];