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Drag & Drop: PREVENT file move

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Drag & Drop: PREVENT file move

Subject: Drag & Drop: PREVENT file move
From: Houdah - ML Pierre Bernard <email@hidden>
Date: Fri, 12 Dec 2008 00:11:47 +0100

Hi!

My application shows a list of files in a table view.

I have implemented drag and drop so that users may drag files from the list. I could envision them dragging the files onto other applications for viewing or dragging them on a removable media to create archive copies.

The problem occurs when the user drags the file to another folder on the same disk. By default, the Finder then wants to move the file. I need to prevent just that as it will cause havoc. For one, I would lose track of the file.

Is there a way for the originating application to control the allowed drag operations?

Best,
Pierre Bernard
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