QT界面开发-(特效)整体可拖动的窗口

转载自邵发《C/C++系列教程》Qt界面开发 https://chuanke.baidu.com/v4509752-209060-1284517.html

只有顶部一小条可以拖动

private:
    virtual void mouseMoveEvent(QMouseEvent * event);
    virtual void mousePressEvent(QMouseEvent * event);
    virtual void mouseReleaseEvent(QMouseEvent * event);

    bool m_dragging; // 是否正在拖动
    QPoint m_startPosition; // 拖动开始前的鼠标位置
    QPoint m_framePosition; // 窗体的原始位置


//写到ui.setupUi(this);下面
    m_dragging = false;

    // 不显示标题栏(亦无边框)
    setWindowFlags(Qt::Window | Qt::FramelessWindowHint);



void TestAandB::mousePressEvent(QMouseEvent *event)
{
    // 只响应左键
    if (event->button() == Qt::LeftButton)
    {
        QRect titleRect = rect();
        titleRect.setBottom(titleRect.top() + 80);

        if (titleRect.contains(event->pos()))
        {
            m_dragging = true;
            m_startPosition = event->globalPos();
            m_framePosition = frameGeometry().topLeft();
        }
    }

    QWidget::mousePressEvent(event);
}

void TestAandB::mouseMoveEvent(QMouseEvent *event)
{
    // 只响应左键
    if (event->buttons() & Qt::LeftButton)
    {
        if (m_dragging)
        {
            // delta 相对偏移量, 
            QPoint delta = event->globalPos() - m_startPosition;

            // 新位置：窗体原始位置  + 偏移量
            move(m_framePosition + delta);
        }
    }

    QWidget::mouseMoveEvent(event);
}

void TestAandB::mouseReleaseEvent(QMouseEvent * event)
{
    m_dragging = false;
    QWidget::mouseReleaseEvent(event);
}

全部可以拖动

void QTXiDaoPanJieMian1::mousePressEvent(QMouseEvent *event)
{
    // 只响应左键
    if (event->button() == Qt::LeftButton)
    {
        m_dragging = true;
        m_startPosition = event->globalPos();
        m_framePosition = frameGeometry().topLeft();
    }
    QWidget::mousePressEvent(event);
}

void QTXiDaoPanJieMian1::mouseMoveEvent(QMouseEvent *event)
{
    // 只响应左键
    if (event->buttons() & Qt::LeftButton)
    {
        if (m_dragging)
        {
            // delta 相对偏移量, 
            QPoint delta = event->globalPos() - m_startPosition;

            // 新位置：窗体原始位置  + 偏移量
            move(m_framePosition + delta);
        }
    }
    QWidget::mouseMoveEvent(event);
}

void QTXiDaoPanJieMian1::mouseReleaseEvent(QMouseEvent * event)
{
    // 结束dragging
    m_dragging = false;
    QWidget::mouseReleaseEvent(event);
}