[kepler-dev] D&D Canvas Question

[Rod Spears]

I didn't change anything with that. It all has to do when the objects 
are created. I don't have a lot of knowledge here, in fact, Matt you 
should have a better understanding of this than me.

But instead of creating the objects when they are dropped, they are 
created as a result of the search when the list being populated.

Then we are dropping an object that has already been created, instead of 
it being created when it is dropped. And how we do this I don't know.

Rod


Matt Jones wrote:

> Actually, I'm quite sure we use the existing Ptolemy DnD mechanism 
> (unless you changed how I did it Rod).  I intentionally used the 
> existing Ptolemy drag and drop when I originally implemented the data 
> source drag -- mainly by subclassing properly which gave us the 
> functionality without having to implement anything special.
>
> Matt
>
> Edward A Lee wrote:
>
>>
>> Hmm... Then you've completely changed the drag and drop
>> mechanism, so I have no idea how it works...
>>
>> Note that the original mechanism was carefully architected
>> so that you could safely drop an object onto an executing model...
>> It does this using a MoMLChangeRequest.
>>
>> Edward
>>
>> At 10:04 AM 9/14/2004 -0500, Rod Spears wrote:
>>
>>> Our data source objects have already been constructed prior to 
>>> dropping them onto the canvas, so when they are dropped their icon 
>>> and location changes, but a new one is not constructed.
>>>
>>> Rod
>>>
>>>
>>> Edward A Lee wrote:
>>>
>>>> At 06:18 PM 9/13/2004 -0500, Rod Spears wrote:
>>>>
>>>>> Is there a notification to "actor" when it is dropped onto the 
>>>>> canvas (from the lefthand panel)?
>>>>>
>>>>> I see several differ attributes getting changed....(like 
>>>>> _location, _icon, etc).
>>>>>
>>>>> Thanks,
>>>>> Rod
>>>>
>>>>
>>>>
>>>> When it is dropped, the actor is constructed from a MoML description.
>>>> Its constructor is called with the container and name as an 
>>>> argument...
>>>> So there is no pre-existing actor to "notify"...
>>>>
>>>> Edward
>>>>
>>>>
>>>> ------------
>>>> Edward A. Lee, Professor
>>>> 518 Cory Hall, UC Berkeley, Berkeley, CA 94720
>>>> phone: 510-642-0455, fax: 510-642-2739
>>>> <mailto:eal at eecs.Berkeley.EDU>eal at eecs.Berkeley.EDU, 
>>>> http://ptolemy.eecs.berkeley.edu/~eal
>>>
>>>
>>>
>>>
>>> -- 
>>> Rod Spears
>>> Biodiversity Research Center
>>> University of Kansas
>>> 1345 Jayhawk Boulevard
>>> Lawrence, KS 66045, USA
>>> Tel: 785 864-4082, Fax: 785 864-5335
>>> _______________________________________________ kepler-dev mailing 
>>> list kepler-dev at ecoinformatics.org 
>>> http://www.ecoinformatics.org/mailman/listinfo/kepler-dev
>>
>>
>>
>> ------------
>> Edward A. Lee, Professor
>> 518 Cory Hall, UC Berkeley, Berkeley, CA 94720
>> phone: 510-642-0455, fax: 510-642-2739
>> eal at eecs.Berkeley.EDU, http://ptolemy.eecs.berkeley.edu/~eal
>>
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>
>