【提问】鼠标双击Qlistviewitem的signal问题 [复制链接]

我在主窗口内用Qlistview做了一个树形显示,希望双击不同的子节点时,窗口显示不同的照片.
但使用SIGNAL("doubleClicked(QListViewItem*)")，信号能被接收，但用SIGNAL("doubleClicked(QListViewItem*,const QPoint&,int)")就不行。不知这两个信号有什么区别？我认为前者是不区分节点，后者是区分节点，但后者传出的信号是什么呢？

这两个信号都是响应双击事件，本质上没有什么区别。以下是帮助文件的说明：

void QListView::doubleClicked ( QListViewItem *, const QPoint &, int ) [signal]
This signal is emitted whenever an item is double-clicked. It's emitted on the second button press, not the second button release. The arguments are the relevant QListViewItem (may be 0), the point in global coordinates and the relevant column (or -1 if the click was outside the list).
Warning: Do not delete any QListViewItem objects in slots connected to this signal.
void QListView::doubleClicked ( QListViewItem * item ) [signal]
This function is obsolete. It is provided to keep old source working. We strongly advise against using it in new code. (use doubleClicked( QListViewItem *, const QPoint&, int ))
This signal is emitted whenever an item is double-clicked. It's emitted on the second button press, not the second button release. item is the list view item on which the user did the double-click.