Anybody?
I'm still struggling with this. I went back to using a QStandardItem for a while which solved the dag&drop behaviour, but now I really need to use a custom item that inherits QStandardItem which breaks the drop behaviour again.


Any ideas or guidance would be greatly appreciated.

Cheers,
frank


On 16/08/16 7:26 PM, Frank Rueter | OHUfx wrote:
Hi,

I am trying to get drag&drop to work between two QListViews using a custom item. I can't find the info I need online other than this document <https://doc.qt.io/archives/4.6/model-view-dnd.html> which helped a little bit but now I'm stuck.

Drag&drop from one QListView to another works fine when I use a QStandardItem to hold my data, but when I use a custom item I run into trouble, because the receiving model/view creates a QStandardItem when the incoming custom items are dropped.

Ideally I could tell the receiving model to use my custom item as the default item and otherwise just do it's thing, but I suppose it won't be that easy?! I have played around with the receiving model's dropMimeData() and insertRows() methods but can't work out how to read the incoming data to then insert a custom item into the receiving model manually. In QAbstractItemModel.dropMimeData() I tried reading mimeData.data('application/x-qabstractitemmodeldatalist'), but that returns a byte stream that I don't know how to handle.

Do I have to re-implement the sender's drag data as well to send the custom item in the first place?

It seems that everything works out of the box except the creation of the QStandardItem upon drop, rather than my custom item, so I am hoping I don't have to re-invent the (drag&drop) wheel just to get that one part right?!

Any advise would be greatly appreciated.

Thanks,
frank



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