Drag and Drop
devin_asay at byu.edu
Thu May 9 15:13:33 CDT 2013
> On 5/9/13 12:42 PM, "Richmond" <richmondmathewson at gmail.com> wrote:
>> On 05/09/2013 09:01 PM, Mark Wieder wrote:
>>> Ray Horsley <ray at ...> writes:
>>>> What am I missing to get drag/drop working consistently?
>>> You might also want to look at
>> Why do I always just use
>> on mouseDown
>> grab me
>> end mouseDown
>> then set up a load of images as dropTargets and have stuff like this in
>> the grabbedObject:
>> on mouseUp
>> if not within (img "target", the mouseloc) then
>> set the loc of me to 857,673
>> end if
>> end mouseUp
>> must be missing something.
Ray wanted to drag files onto stacks. Grab only works on objects inside a single stack.
On May 9, 2013, at 2:07 PM, Scott Rossi wrote:
> Only you can know why you always use that technique, but with grab,
> there's no way to act upon events/messages while grab is active (thus you
> can't do cursor updates and provide user feedback), and you can't "grab"
> an object across stacks.
That's mostly true, Scott. The only mouse message that gets sent during a grab is mouseMove. So you can check location, within() and other things during the grab operation and act on them within the mouseMove handler.
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