Qt制作可点击的Label

特此记录，供以后使用：

.cpp

#include "clicklabel.h"

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

{      

init();      

}      

void QClickLabel::init()      

{      

m_number = 0;      

}      

void QClickLabel::setClieckNumber(int num)      

{      

m_number = num;      

update();      

}      

void QClickLabel::mousePressEvent(QMouseEvent *event)      

{      

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

{      

emit clicked(m_number);      

}      

QLabel::mousePressEvent(event);     //将该事件传给父类处理      

}      

.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:      

void mousePressEvent(QMouseEvent *event);      

private:      

int m_number;      

};      

调用（部分代码）：

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

{      

backLabel[i] = new QLabel(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] = new QClickLabel(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)));      

}
        }
      

其中 closeButton[i]为clickLabel类型，如何定义就不用说了吧，声明如下：

QClickLabel *closeButton[4];