qt重写鼠标事件移动窗体

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头文件

public:

    Widget(QWidget *parent = nullptr);

    ~Widget();

    QPoint mousePoint;

    bool m_mousePressed;

    void mouseMoveEvent(QMouseEvent *event);//鼠标按下事件

    void mousePressEvent(QMouseEvent *event);//鼠标释放事件

    void mouseReleaseEvent(QMouseEvent *event);//鼠标松开事件

源文件

Widget::Widget(QWidget *parent)

    : QWidget(parent)

    , ui(new Ui::Widget)

    ui->setupUi(this);

    this->setWindowFlags(this->windowFlags() | Qt::FramelessWindowHint);

    m_mousePressed = false;

Widget::~Widget()

    delete ui;

void Widget::mouseMoveEvent(QMouseEvent *event)

    if(m_mousePressed && (event->buttons() && Qt::LeftButton)){

        this->move(event->globalPos()- mousePoint);

        event->accept(); //accept ()函数用来告诉Qt，事件处理函数“接收”了这个事件，不要再传递；

void Widget::mousePressEvent(QMouseEvent *event)

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

        m_mousePressed = true;

        mousePoint = event->globalPos() - this->pos();

        event->accept();

void Widget::mouseReleaseEvent(QMouseEvent *event)

    m_mousePressed = false;

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