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Re: NSView / Drag and Drop: Any API or constants to detect the start of a drag?




On Nov 10, 2007, at 2:48 AM, Stéphane Sudre wrote:

Unfortunately, I had a look at this method during my search.

There's no "magnetism" with this call : you get the message as soon as the mouse moved from 1 pixel.

Stephane,

What we typically do in a Cocoa app for the behavior you describe is to save the location of the mouseDown event, and compare it to the location of a mouseDragged event. If the distance is greater than whatever threshold you want, then you go ahead and send a - dragFile:... or -dragImage:... type of message.

In some cases, drag and drop is chosen by a modifier key, and in those situations, you probably want to go ahead and initiate the dragging session without caring how far the cursor has moved.

-jcr_______________________________________________

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 >Re: NSView / Drag and Drop: Any API or constants to detect the start of a drag? (From: Stéphane Sudre <email@hidden>)



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