QT笔记 -- (3) 为QLabel添加鼠标响应方法1

参考 http://qt-project.org/wiki/Make-a-QLabel-Clickable

1.首先重载QLabel的mousePressEvent,这样点击QLabel时就能发出clicked()信号，将信号connect到自定义的slot就可以了

ClickableLabel.h

#pragma once
#include "qlabel.h"
#include <QMouseEvent>

class ClickableLabel : public QLabel{
    Q_OBJECT

public:
    explicit ClickableLabel(QWidget* parent = 0) :QLabel(parent){
        setText("");
    };
    ~ClickableLabel();
signals:
    void clicked();
protected:
    void mousePressEvent(QMouseEvent* event){
        emit clicked();
    }
};

ClickableLabel.cpp

#include "ClickableLabel.h"

ClickableLabel::~ClickableLabel(){};

2.使用ClickableLabel取代QLabel