QT窗体标题栏隐藏后mousemoveevent还是不能托动，求助

[jiaowenbill1990]

我照网上的帖子把进行操作 ，但是为什么还是不能拖动窗体，各位，麻烦赐教下：
代码如下
//dialog.h
#ifndef DIALOG_H
#define DIALOG_H

#include <QtGui/QMainWindow>
#include <QPoint>
#include <QMouseEvent>
class dialog : public QMainWindow
{
Q_OBJECT

public:
dialog(QWidget *parent = 0);
~dialog();
void mousePressEvent(QMouseEvent *e);
void mouseMoveEvent(QMouseEvent *e);
QPoint dragPosition;
};

#endif // DIALOG_H

然后是dialog.cpp

#include "dialog.h"

dialog::dialog(QWidget *parent)
: QMainWindow(parent)
{
// setWindowFlags(Qt::FramelessWindowHint);

}

dialog::~dialog()
{

}
void dialog::mousePressEvent(QMouseEvent *e)

{
if(e->button()==Qt::LeftButton)
{
dragPosition = e->globalPos() - frameGeometry().topLeft();
e->accept();
}
else
{
}
}
void dialog::mouseMoveEvent(QMouseEvent *e)
{
if (e->button() & Qt::LeftButton)
{

move(e->globalPos() - dragPosition);
e->accept();
}
}

mousepressevent和mousemoveevent里面的代码是网上搬下来的，可是不行啊，麻烦谁知道的说一声。

[我是学友]

    bool isMouseDown;
    //移动前老位置
    QPoint oldPoint;
    //主界面基准点
    QPoint mainPoint;

//***鼠标事件、界面移动函数
void Calculator::mousePressEvent(QMouseEvent *mouseEvent)
{
    //鼠标按下，为真
    isMouseDown = true;
    oldPoint = this->mapToGlobal(mouseEvent->pos());
}

void Calculator::mouseReleaseEvent(QMouseEvent *)
{
    //如果鼠标松开，为假
    isMouseDown = false;
}

void Calculator::mouseMoveEvent(QMouseEvent *mouseEvent)
{
    if(isMouseDown && !this->isMaximized())
    {
        mainPoint = this->mapToGlobal(mouseEvent->pos());
        int x = mainPoint.x() - oldPoint.x();
        int y = mainPoint.y() - oldPoint.y();
        oldPoint = mainPoint;
        mainPoint = this->pos();
        mainPoint.setX(mainPoint.x() + x);
        mainPoint.setY(mainPoint.y() + y);
        this->move(mainPoint);
        //键盘移动后新的移动点
        QPoint newPoint;
        newPoint.setX(mainPoint.x()+110);
        newPoint.setY(mainPoint.y());
    }
}

[我是学友]

这个代码是我程序里的，基本上粘过去就能用，LZ看看吧

[jiaowenbill1990]

先谢谢了，我待会儿看看

[myseemydog]

。。。。先看懂了再copy好点吧。。。