Re: Preventing unwanted slidebacks

FROM : olivier
DATE : Thu Jan 16 18:44:23 2003

I did a similar things to you, and never get a slideback.

I set slideBack: YES and always return NO to
tableView:writeRows:toPasteboard:

Sometimes it might take up to ten or fifteen seconds to create the
file, but i never had a problem.


Hope this help, olivier


On Thursday, January 16, 2003, at 11:03  AM, Buzz Andersen wrote:

> Hi all,
> I have been wrestling with HFS promised drags in Cocoa for some time
> now, and am seriously on the verge of writing my own Cocoa wrapper for
> the Carbon drag manager to compensate for the limitations of Apple's
> implementation.  Until I can accomplish that, however, I would very
> much like to fix a current annoyance in an application of mine:
> sometimes, when doing a promised drag, the drag "slides back," even
> though the actual drag was successful.
>
> This happens even though I  specify "slideBack: NO" when I call
> "dragPromisedFilesOfTypes:".  My current theory about why this is
> happening is that I am dragging from a table view, and the view is
> timing out waiting for "tableView:writeRows:toPasteboard:" to return
> and simply concluding that the drag was unsuccessful.  My
> understanding is that this method is normally supposed to simply put
> something on the pasteboard and quickly return "YES" or "NO".  Since I
> have to use that method to call "dragPromisedFilesOfTypes:," which
> doesn't return until the entire drag cycle is completed, I theorize
> that the behavior I am experiencing is related to a timeout.
>
> Does anyone have any ideas about how I could work around this for the
> moment?  It doesn't have to be pretty since it is only needed until I
> can implement a better drag mechanism.  Perhaps there is something
> that I could override in an NSTableView subclass to prevent the
> slideback from drawing?
>
> Any help would be *greatly* appreciated, since I am banging my head
> against the wall trying to solve this problem!
>
> --
> Buzz Andersen
> email: <email_removed>
> web: http://www.scifihifi.com
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