Re: cocoa dragging and constraining coordinates
Re: cocoa dragging and constraining coordinates
- Subject: Re: cocoa dragging and constraining coordinates
- From: Kyle Sluder <email@hidden>
- Date: Tue, 24 May 2011 08:08:51 -0700
On Mon, May 23, 2011 at 8:21 PM, Kurt Sutter <email@hidden> wrote:
> How? Is there any way to constrain the coordinates of the image passed to
> dragImage:at:offset:event:pasteboard:source:slideBack from the drag destination?
By not dragging an image, and drawing the dragged object directly in
your view, or in a transparent overlay window that follows the mouse.
>>
>> But the big question is how to you discern between a within-app drag
>> that extends beyond the visible bounds of your window, versus an
>> attempt to drag outside the app? There really isn't any API for
>> telling the drag manager to start or stop allowing inter-application
>> drags while in the middle of a drag operation.
>>
>>
> My drag destination can distinguish where the drag comes from. If it is an
> in-applicaiton drag (in fact, an in-document drag), it could constrain the
> coordinates of the image (if I knew how)
Yes, all drag destinations can discern whether the drag is coming from
within the app, and then make further decisions based on that info.
But if I pick up an object and drag it to the edge of your document
window, do I expect further movement to scroll the document window, or
to switch to an out-of-application drag?
--Kyle Sluder
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