Using methods from private classes

eska2000

Hi.

I need to check whenever user press on the string or folders sign on QTreeView.
I saw qt source of mousePressEvent:

void QTreeView::mousePressEvent(QMouseEvent *event)
{
    Q_D(QTreeView);
    bool handled = false;
    if (style()->styleHint(QStyle::SH_ListViewExpand_SelectMouseType, 0, this) == QEvent::MouseButtonPress)
        handled = d->expandOrCollapseItemAtPos(event->pos());
    if (!handled && d->itemDecorationAt(event->pos()) == -1)
        QAbstractItemView::mousePressEvent(event);
}

There are using of the expandOrCollapseItemAtPos(QPos *) and itemDecorationAt(QPos *) methods. These methods located in the QTreeViewPrivate class.
Can I use these methods? Is it legal?
Do I need to reimplement QTreeViewPrivate class to use these methods?

Thank you.

sierdzio

Can I use these methods? Is it legal?

Yes you can. You need to include widgets-private in QT variable in qmake to do so.

Remember, though, that these methods are called private for a reason - normally users do not need to use them. Also, Qt does not offer any source / binary compatibility promises for private classes.

Are you sure you can't achieve your goals without private classes?

eska2000

@sierdzio , thank you! I will try to solve my task by another way.

mrjj

@eska2000
Hi
There is signals for when it's expanded / collapsed.

If you tell what task is, maybe someone knows good way to solve it. :)

eska2000

@mrjj
My task is to drag items from QTreeView to another widget.
But when I try to drag item this item makes selected. I need to drag items without selection them.
So I want to reimplement mousePressEvent.
But I still need to collapse/expand items, so if I reimplement mousePressEvent I need to see which area of the item (string or sign) user pressed.