Re: Pick

Alan,

In your situation I'd create a different CellImpl for
each kind of event. Note PickManipulationRendererJ3D
packs in a lot of CellImpl's in a small space. They
don't each have their own Thread, since we use a Thread
pool.

Cheers,
Bill

On Thu, 14 Mar 2002, Alan D Kalvin wrote:

> Curtis's solution works well if you know the order of the actions that
> trigger the
> cell's doAction() method - since you know ahead of time which actions to
> ignore.
>
> I'm trying to implement a more general solution to process calls to
> doAction() based
> only on the type of activity that triggered them, e.g.
>
>       if (doAction is triggered by a pick) {
>                    pickProcess();
>                 }
>       else  if (doAction is triggered by data change) {
>                    changeProcess();
>                 }
>                 else {
>                   someOtherProcess();
>                 }
>
>
> I tried to solve this by subclassing the CellImpl class and overriding the
> thingChanged() method
> so that I could examine the ThingChangedEvent object passed to this method.
> Unfortunately, this
> doesn't help since there is no useful information in the ThingChangedEvent
> object.
>
> Alternatively, listening for mouse events (generated from the picks)
> doesn't seem the way to go
> since ThingsChangedEvents are "lossy" and I don't see how they could be
> matched up with the
> corresponding mouse events.
>
> Any suggestions?
>
> Alan
>
> --------------------------------------------------------------------------------------------------------
>
> Alan Kalvin Ph.D., kalvin@xxxxxxxxxx,  (914) 784-6907, Visual Analysis
> Group,
> IBM T. J. Watson Research Center, P. O. Box 704, Yorktown Heights, NY 10598
> --------------------------------------------------------------------------------------------------------
>
>
> "A hen is only an egg's way of making another egg."  -  Samuel Butler
>
> >>
> --------------------------------------------------------------------------------------------------------
> >> To: Doug Lindholm <lind@xxxxxxxx>
> >> Subject: Re: Pick
> >> From: Curtis Rueden <curtis@xxxxxxxxxxxxx>
> >> Date: Tue, 05 Feb 2002 14:36:02 -0600
> >> In-reply-to: <3C601F3D.F5CE9344@xxxxxxxx>
>
> >>
> ---------------------------------------------------------------------------------------------------------
>
> >> Hi Doug,
>
> >> I usually handle that situation by adding an "ignoreNextAction" flag
> >> that I set to true just before calling cell.enableAction().  Then,
> >> in the Cell's doAction() method, I put:
> >>    if (ignoreNextAction) {
> >>      ignoreNextAction = false;
> >>      return;
> >>    }
> >> as the first couple of lines for the method.
>
> >> -Curtis
>
> >> At 12:06 PM 2/5/2002, Doug Lindholm wrote:
> >> >I have a CellImpl handling "picks" for my data with a
> >> >PickManipulationRendererJ3D. I also have GUI hooks that allow the user
> >> >to turn off/on the data using the renderer's toggle method. However,
> >> >when I
> >> >toggle the thing on, it performs the CellImpl's action. How can I make
> >> >the CellImpl respond only to "picks" but not other things?
>
>
>
>


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