BouncyPressSpring class

Spring physics for the press animation.

A spring responds to the finger mid-animation: pressing again during a release reverses smoothly from wherever the button is, carrying its speed, instead of restarting a fixed curve. With a dampingRatio below 1, the button overshoots on release before settling.

When a spring is set, the animation's duration and curves are not used. Under the system "reduce motion" setting, the button moves instantly.

Annotations

• @immutable

Constructors

BouncyPressSpring({double stiffness = 500, double dampingRatio = 0.5, double mass = 1})

Creates a spring.

const

Properties

dampingRatio → double

How quickly motion dies away. Below 1 overshoots and bounces, 1 settles as fast as possible without overshoot, and above 1 is sluggish.

final

hashCode → int

The hash code for this object.

no setter, override

mass → double

The mass on the spring. Higher feels heavier and slower.

final

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

stiffness → double

How strongly the spring pulls toward its target. Higher is faster.

final

Methods

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

override

Operators

operator ==(Object other) → bool

The equality operator.

override

Constants

bouncy → const BouncyPressSpring

A visible bounce on release.

gentle → const BouncyPressSpring

Slow and soft, with no overshoot.

snappy → const BouncyPressSpring

Quick, with a hint of overshoot.