createRectTween property

Defines how the destination hero's bounds change as it flies from the starting route to the destination route.

A hero flight begins with the destination hero's child aligned with the starting hero's child. The Tween<Rect> returned by this callback is used to compute the hero's bounds as the flight animation's value goes from 0.0 to 1.0.

If this property is null, the default, then the value of HeroController.createRectTween is used. The HeroController created by MaterialApp creates a MaterialRectAreTween.