QT窗口拖拽移动

 添加鼠标点击事件

   void mouseMoveEvent(QMouseEvent *event);

   void mousePressEvent(QMouseEvent *event);

  QPoint m_startPoint;

  QPoint m_windowPoint;

头文件

#include <QtWidgets/QWidget>

#include <QMouseEvent>

 判断是否点击移动

void MainWindow::mousePressEvent(QMouseEvent *event)//窗口移动事件

{

    //当鼠标左键点击时.

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

      {

          m_move = true;

          //记录鼠标的世界坐标.

          m_startPoint = event->globalPos();

          //记录窗体的世界坐标.

          m_windowPoint = this->frameGeometry().topLeft();

      }

void MainWindow::mouseMoveEvent(QMouseEvent *event)//窗口移动事件

{

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

      {

          //移动中的鼠标位置相对于初始位置的相对位置.

          QPoint relativePos = event->globalPos() - m_startPoint;

          //然后移动窗体即可.

          this->move(m_windowPoint + relativePos );

      }

}

}