接口定义：

void DWIM_SetPos(QObject * im, int x, int y)

void DWIM_SetPos(QObject * im, QPoint _pos) 

这个接口实际是由DWInputMethodOption封装实现，代码如下：

// 设置位置
inline void DWIM_SetPos(QObject * im, int x, int y)
{
    QPoint _pos = QPoint(x, y);
    DWInputMethodOption(im, "pos", (QObject*)&_pos);
}
inline void DWIM_SetPos(QObject * im, QPoint _pos)
{
    DWInputMethodOption(im, "pos", (QObject*)&_pos);
}