FEATURE: Choose whether to reset or not a OneShotAnimation

[TheFe91]

Currently a OneShotAnimation resets the animation to its first frame at his hand. This PR introduces the possibility to disable this behavior.

[HayesGordon]

Hi @TheFe91 thanks for the contribution!

This is something we could add, but this could become bloated really fast by having all the possible lifetime conditions for a controller. An alternative approach (and the suggested) would be to instead extend the desired class and create your own controller. In this instance it could look something like this:

class MyController extends OneShotAnimation {
  MyController(String animationName, {this.resetOnEnd = true})
      : super(animationName);
  final bool resetOnEnd;

  @override
  void reset() {
    if (resetOnEnd) {
      super.reset();
    }
  }
}

Or for more control extend SimpleAnimation

[TheFe91]

Thank you!
This is exactly what I've been doing till today, so I thought that it could be a nice solution to have that boolean inside that funciton.

And thanks also for the suggestion. I think that at this point there's no need to keep this PR opened!
Cheers!