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 

#include 

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];