Hi all, I'm currently experimenting troubles with D&D in QListView. I joined a simple QListModel subclass and a main program to illustrate it.
What I want is to be able to move my items in my list but without
overwritting (i.e I want to implement a re-ordering feature).
I my test, you can see I overrode insertRows(),removeRows(), data() and
setData() methods so D&D can move the items plus supportedDropActions() and
flags().
I didn't put "ItemIsDropEnabled" in flags() method in order not to overwrite
items when dropping something on it.
The problem is that with this implementation of the flags() method, no drop
action is accepted at all (drop indicator show a "forbidden" image).
Moreover, I read the C++ code of dropIndicatorPosition() (see below) and it
seems that with "ItemIsDropEnabled" not being flagged, I should get a
dropIndicator "AboveItem" or "BelowItem". (I didn't try to test my example
in C++ though)
Does someone know about this issue and/or (even better) have a solution ?
If this is a bug, any workaround would be appreciated :) (I'm quite stuck
with it).
Best regards.
Julien.
PS : C++ Code:
QAbstractItemView::DropIndicatorPosition
QAbstractItemViewPrivate::position(const QPoint &pos, const QRect &rect,
const QModelIndex &index) const
{
...
if (r == QAbstractItemView::OnItem && (!(model->flags(index) &
Qt::ItemIsDropEnabled)))
r = pos.y() < rect.center().y() ? QAbstractItemView::AboveItem :
QAbstractItemView::BelowItem;
return r;
}
DraggableListModel.java
Description: Binary data
Main.java
Description: Binary data
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