Flutter for Beginners

Custom Tween

To create a custom Tween class, first, we need to define our value object. Here, we have opted for grouping the transformation values:

class ButtonTransformation {  final double scale;  final double angle;  final Offset offset;  // this none getter returns a initial state of transformation  // with default scale, no rotation or translation  static ButtonTransformation get none => ButtonTransformation(        scale: 1.0,        angle: 0.0,        offset: Offset.zero,      );}

And then, we extend the Tween class with our defined type:

class CustomTween extends Tween<ButtonTransformation> {  CustomTween({ButtonTransformation begin, ButtonTransformation end} ):   super(begin: begin, end: end,);  @override  lerp(double t) {    return super.lerp(t);  }}

We need to define ...