Can not resize the window(QGLWidget) after using QCursor::setPos()

[pmohod]

Dear all,

I am using Qt-4.6.2 in my application.
I have created a class(ImgMatchTex) inherited from QGLWidget.
Now when I am using QCursor::setPos(int, int) function to set the cursor position.
But after using it, it is giving a problem while resizing the window.
I am not able to increase the height of the window. Event->size().height() remains to constant(zero) even if I try to increase the window height,
and this is due to QCursor::setPos(int, int) function. When I comment this line , it works fine.
Could anyone know reason behind such a abnormal behaviour.

void ImgMatchTex::resizeEvent (QResizeEvent *Event) // Derived form QGLWidget.
 
{ 
 
    makeOverlayCurrent(); 
    resizeOverlayGL (Event->size().width(), Event->size().height() ); 
 
    makeCurrent(); 
    resizeGL (Event->size().width(), Event->size().height() ); 
 
    QPoint GWinCent = mapToGlobal (QPoint(width()/2, height()/2)); 
    QCursor::setPos (GWinCent.x(), GWinCent.y());
 
}

void ImgMatchTex::resizeEvent (QResizeEvent *Event) // Derived form QGLWidget.

{ 

    makeOverlayCurrent(); 
    resizeOverlayGL (Event->size().width(), Event->size().height() ); 

    makeCurrent(); 
    resizeGL (Event->size().width(), Event->size().height() ); 

    QPoint GWinCent = mapToGlobal (QPoint(width()/2, height()/2)); 
    QCursor::setPos (GWinCent.x(), GWinCent.y());

}

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