如何控制mdi子窗口的大小何位置？？？

[w22net]

如何控制mdi子窗口的大小何位置？？？如下代码显示的窗口是一个最小状态

DialogBaiDuMap *formDoc = new DialogBaiDuMap(this); //
ui->mdiArea->addSubWindow(formDoc); //文档窗口添加到MDI
formDoc->show(); //在单独的窗口中显示
//formDoc->showMaximized();
formDoc->resize(400,300);

[w22net]

foreach (QMdiSubWindow *window, ui->mdiArea->subWindowList())
{
if(window->windowTitle()=="位") {

window->setGeometry(0,0,mdiWidth/5,mdiHeight);

}
else if(window->windowTitle()=="图"){
window->setGeometry(mdiWidth/5,0,mdiWidth/5+10,mdiHeight/2-40);
}
else if(window->windowTitle()=="比"){
window->setGeometry(mdiWidth*2/5+10,0,mdiWidth*3/5-10,mdiHeight/2-40);
}
else if(window->windowTitle()=="控"){
window->setGeometry(mdiWidth*1/5,mdiHeight/2-40,mdiWidth*4/5,mdiHeight/2+40);
}
window->showNormal();
}