SpeedEffectController class

This controller can force execution of an effect at a predefined speed.

For most of the effect controllers, their duration is set by the user in advance. This controller is different: it knows the target speed at which the parent effect wants to proceed, communicates with the effect to determine its total distance, and uses that to calculate the desired duration for the child effect controller.

Some restrictions apply:

• the speed cannot be zero (or negative),
• the child controller must be a DurationEffectController,
• the parent effect must be a MeasurableEffect.

Inheritance

• Object
• EffectController
• SpeedEffectController

Mixed-in types

• HasSingleChildEffectController<DurationEffectController>

Constructors

SpeedEffectController(DurationEffectController child, {required double speed})

Properties

child → DurationEffectController

Returns the wrapped child effect controller.

no setter, override

completed → bool

Has the effect already finished?

no setter, override

duration → double?

Total duration of the effect. If the duration cannot be determined, this will return null. For an infinite effect the duration is infinity.

no setter, override

hashCode → int

The hash code for this object.

no setter, inherited

isInfinite → bool

Will the effect continue to run forever (never completes)?

no setter, inherited

isRandom → bool

Is the effect's duration random or fixed?

no setter, override

progress → double

The current progress of the effect, a value between 0 and 1.

no setter, override

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

speed → double

final

started → bool

Has the effect started running? Some effects use a "delay" parameter to postpone the start of an animation. This property then tells you whether this delay period has already passed.

no setter, inherited

Methods

advance(double dt) → double

Advances this controller's internal clock by dt seconds.

override

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

onMount(Effect parent) → void

This is called by the Effect class when the controller is attached to that effect. Controllers with children should propagate this to their children.

override

recede(double dt) → double

Similar to advance(), but makes the effect controller move back in time.

override

setToEnd() → void

Puts the controller into its final "completed" state.

override

setToStart() → void

Reverts the controller to its initial state, as it was before the start of the animation.

override

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited