Re: Drag and Drop to Carbon Only
Re: Drag and Drop to Carbon Only
- Subject: Re: Drag and Drop to Carbon Only
- From: "Erik J. Barzeski" <email@hidden>
- Date: Mon, 01 Apr 2002 01:20:15 -0500
Hi,
On 3/31/02 11:14pm, "Brian Webster" <email@hidden> wrote:
>
One possibility might have to do with the
>
draggingSourceOperationMaskForLocal: method in the
>
NSDraggingSource protocol. The method takes a BOOL argument
>
that lets you return different sets of drag operations for local
>
and non-local drags (i.e. drags within your app and drags to
>
another app). You can use this to prevent a user from copying
>
data out of your app by drag-and-drop if you don't want them to.
That was it. I implemented that method in my subclass, returned the
"everything" mask item, and it works.
>
However, there is a bug in the drag system whereby drags to
>
Carbon apps pass in YES as the flag when it should pass in NO.
>
I don't know what NSTableView's default implementation of this
>
method returns, but if it returns a different value for
>
non-local drags that would prevent them, that would explain why
>
the drags only work within your app and to Carbon apps, but not
>
other Cocoa apps, which do behave correctly with respect to
>
locality.
>
>
Try subclassing NSTableView (if you haven't done so already) and
>
implementing this method to return an appropriate drag operation
>
for both local and non-local drags.
Yep, thanks for the heads up. That would've taken me awhile to find. I
appreciate it. Hopefully this will now be archived for others to find (I
looked and didn't find this answer).
Thanks again.
--
Best wishes,
Erik J. Barzeski
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