Using animations

When working with animations, we are not going to always be creating exactly the same animation objects, but we can find some similarities in use cases. Tween objects are useful for changing the type and range of an animation. We will, most of the time, be composing animations with AnimationController, CurvedAnimation, and Tween instances.

Before we use a custom Tween implementation, let's revisit our widget transformations from the earlier Transforming widgets with the Transform class section by applying the transformation in an animated way. We will get the same final effect but in a smooth and dynamic way.

Rotate animation

Instead of changing the button rotation directly, we can instead make it progressive by using the AnimationController class. An example of this kind of animation is shown in the following screenshot:

Figure 10.3 – Using animation to rotate a button

In the following example, we are creating our widget...