Re: NSTableView: move rows through drag and drop?
Re: NSTableView: move rows through drag and drop?
- Subject: Re: NSTableView: move rows through drag and drop?
- From: Mark Munz <email@hidden>
- Date: Wed, 10 Aug 2011 14:34:45 -0700
Docs say draggedImage:endedAt:operation: has been around since 10.0
In 10.7, NSDraggingSource became a formal protocol, but the informal
protocol has been around a while.
On Wed, Aug 10, 2011 at 2:30 PM, Izak van Langevelde <email@hidden> wrote:
>
> On 2011-08-10, at 5:11 PM, Jens Alfke wrote:
>
>>
>> On Aug 9, 2011, at 8:43 PM, Izak van Langevelde wrote:
>>
>>> Now I want to allow drag and drop from one document to another, and my first guess was to write the row data to the pasteboard.
>>> What puzzles me, is how to delete the row data from the source data, in case of a move. That is, my acceptDrop inserts the row data into the destination data source, but the indexes of the source rows are not available at this point.
>>
>> And also consider that the destination of the drag could be a different app, in which case you don’t get an -acceptDrop: call at all.
>>
>> Instead, to handle the source end of a move (or delete, i.e. drag to Trash) you need to implement the NSDraggingSource protocol’s -draggedImage:endedAt:operation: method. If the operation was a move or delete, you should delete the dragged items.
>
> I considered it, but it seems to have been available since Lion, and am looking for something which works on older systems.
>
> I am a little surprised that there does not seem to be an elegant solution for inter-document drag-and-drop moves within the same application, other than keeping track of the row indexes in the source, putting the row numbers on the pasteboard and notifying the source of a successful move to the destination. I had expected to put the row data on the pasteboard to facilitate cross-document drag-and-drop, but as I need the row indexes anyway, it does not really make sense to put anything other than row indexes on the pasteboard.
>
> ---
> Grinnikend door het leven...
>
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Mark Munz
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