[Interest] QListView: drag&drop custom item

Frank Rueter | OHUfx frank at ohufx.com
Tue Aug 16 23:56:24 CEST 2016


Anybody?
I can find plenty of examples on how to drag items from a view to a 
widget but can't find anything about dragging a custom item from one 
view to another.
Guess I will start to re-implement the entire drag&drop, maybe the 
solution will become apparent then.


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
>
>
>
> -- 
> ohufxLogo 50x50 <http://www.ohufx.com> 	*vfx compositing 
> <http://ohufx.com/index.php/vfx-compositing> | *workflow customisation 
> and consulting <http://ohufx.com/index.php/vfx-customising>* *
>
>
>
> _______________________________________________
> Interest mailing list
> Interest at qt-project.org
> http://lists.qt-project.org/mailman/listinfo/interest

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.qt-project.org/pipermail/interest/attachments/20160817/4bc046c7/attachment.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: image/png
Size: 2666 bytes
Desc: not available
URL: <http://lists.qt-project.org/pipermail/interest/attachments/20160817/4bc046c7/attachment.png>


More information about the Interest mailing list