MotionHelperInterface

Kotlin |Java

interface MotionHelperInterface : Animatable, MotionLayout.TransitionListener

Known direct subclasses

MotionHelper

Known indirect subclasses

`Carousel`	Carousel works within a MotionLayout to provide a simple recycler like pattern.
`MotionEffect`	MotionHelper that automatically inserts keyframes for views moving in a given direction, out of:

This defined the interface for MotionLayout helpers Helpers can be used to draw motion effects or modify motions

Summary

Public functions
`Boolean`	`isDecorator()` is involved in painting
`Boolean`	`isUseOnHide()` Notify when views are hidden
`Boolean`	`isUsedOnShow()` Notify when view is visible
`Unit`	`onFinishedMotionScene(motionLayout: MotionLayout!)` This is called after motionLayout read motionScene and assembles all constraintSets
`Unit`	`onPostDraw(canvas: Canvas!)` Called after views are painted
`Unit`	`onPreDraw(canvas: Canvas!)` Call before views are painted
`Unit`	`onPreSetup( motionLayout: MotionLayout!, controllerMap: HashMap<View!, MotionController!>! )` Called after motionController is populated with start and end and keyframes.

`Float`	`getProgress()` get the progress
`Unit`	`setProgress(progress: Float)` Set the progress

`Unit`	`onTransitionChange( motionLayout: MotionLayout!, startId: Int, endId: Int, progress: Float )` Called when a drawer's position changes.
`Unit`	`onTransitionCompleted(motionLayout: MotionLayout!, currentId: Int)` Called when a drawer has settled completely a state.
`Unit`	`onTransitionStarted(motionLayout: MotionLayout!, startId: Int, endId: Int)` Called when a drawer is about to start a transition.
`Unit`	`onTransitionTrigger( motionLayout: MotionLayout!, triggerId: Int, positive: Boolean, progress: Float )` Call when a trigger is fired

fun isDecorator(): Boolean

is involved in painting

Returns
`Boolean`

fun isUseOnHide(): Boolean

Notify when views are hidden

Returns
`Boolean`

fun isUsedOnShow(): Boolean

Notify when view is visible

Returns
`Boolean`

fun onFinishedMotionScene(motionLayout: MotionLayout!): Unit

This is called after motionLayout read motionScene and assembles all constraintSets

Parameters
`motionLayout: MotionLayout!`

fun onPostDraw(canvas: Canvas!): Unit

Called after views are painted

Parameters
`canvas: Canvas!`

fun onPreDraw(canvas: Canvas!): Unit

Call before views are painted

Parameters
`canvas: Canvas!`

fun onPreSetup(
    motionLayout: MotionLayout!,
    controllerMap: HashMap<View!, MotionController!>!
): Unit

Called after motionController is populated with start and end and keyframes.

Parameters
`motionLayout: MotionLayout!`
`controllerMap: HashMap<View!, MotionController!>!`