I'm going to be delving into the animation world in the next few
weeks. Thanks very much for this. I'll try to keep this in mind if I
have any issues.
On Aug 6, 11:24 am, Michael <michael.vill...@gmail.com> wrote:
> Hi,
>
> I didn't see a place to post bugs, so I am submitting it to the group.
>
> I've been working with GWT for a one off project on our
> website,www.studyisland.com. I was attempting to use the Animation class (in
> package com.google.gwt.animation.client) and could not figure out a
> way to get an animation of an Image object to replay when I clicked on
> it. I tried both rerunning the original Animation instance recreating
> the instance and attempting to run it. My code is identical to the
> example in the GWT showcase, with the exception that I create 3 unique
> animations, one for each image on the page.
>
> The showcase animation can be replayed, but in my case, where 3
> animations existed the animations could not.
>
> Digging into the Animation class, it is obvious why this is by the
> line of code in the method run(int duration, double startTime):
>
> // Restart the timer if there is the only animation
> if (animations.size() == 1) {
> animationTimer.schedule(DEFAULT_FRAME_DELAY);
> }
>
> So, you can't re-run an animation if you create more than one
> animation instance on your page. Thats fine, there may be some
> limitation that I'm unaware of to prevent this. I'll just reset the
> Animation class back to its initial state and start over... but I
> can't because the animations are driven by an array called
> "animations" that is a private static member of the class, and there
> are no accessible methods to reset it.
>
> Fortunately the easy solution for me is to just copy all of the code
> in the Animation class into a new class, and add a method
> "resetAnimations" to take care of this.
>
> public static void resetAnimations() {
> animations.clear();
> animations = null;
>
> }
>
> I just call this before re-running any animations, and everything
> works fine.
>
> Now, I consider myself pretty good with Java, but I'm not a javascript
> expert so I can't say for sure whether doing this is safe or why the
> original programmers didnt include this functionality initially.
> However, I think it very likely that there will be other GWT users in
> the future who might encounter this issue, hence I think it should be
> addressed.
>
> If you have any questions about my writeup here, or would like some
> code or something like that, feel free to email me:
> michael.vill...@gmail.com.
>
> I'm loving GWT by the way. Thanks to everyone who has contributed!
> -Michael
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