Re: Cannot D&D from an NSTableView
Re: Cannot D&D from an NSTableView
- Subject: Re: Cannot D&D from an NSTableView
- From: Conrad Shultz <email@hidden>
- Date: Mon, 14 Nov 2011 17:21:43 -0800
Ah...
Have you read the documentation for NSCell's -hitTestForEvent:inRect:ofView: ?
In particular the note:
If the cell not disabled, and it would track, return NSCellHitContentArea |NSCellHitTrackableArea.
I believe that for dragging to work you do NOT want to return NSCellHitTrackableArea. What happens in your custom cell class if you return just NSCellHitContentArea?
(I'm assuming from your original message that you had been using the default hit test implementation.)
(Sent from my iPhone.)
--
Conrad Shultz
On Nov 14, 2011, at 17:05, Koen van der Drift <email@hidden> wrote:
>
> On Nov 14, 2011, at 7:15 PM, Conrad Shultz wrote:
>
>> Are you subclassing NSCell directly or using one of its subclasses?
>>
>> Out of the box, NSTableView (or, rather, NSTableColumn) uses an
>> NSTextFieldCell, which importantly inherits from NSActionCell, which
>> itself adds lots of core functionality that we are used to (for example,
>> the target-action pattern).
>>
>> It's possible that it also does some things behind the scenes to make
>> drag and drop work better. So: what happens if you inherit from
>> NSActionCell?
>
> I'm indeed subclassing NSCell. Using NSActionCell doesn't make a difference. But with NSTextFieldCell it works.
>
> Thanks for the suggestion.
>
> - Koen.
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