KeyTrigger

Artifact: androidx.constraintlayout:constraintlayout

Added in 2.2.1

Kotlin |Java

class KeyTrigger : Key

kotlin.Any
↳	androidx.constraintlayout.motion.widget.Key
	↳	androidx.constraintlayout.motion.widget.KeyTrigger

Defines container for a key frame of for storing KeyAttributes. KeyAttributes change post layout values of a view.

Summary

Constants
`const String!`	`CROSS = "CROSS"`
`const Int`	`KEY_TYPE = 5`
`const String!`	`NEGATIVE_CROSS = "negativeCross"`
`const String!`	`POSITIVE_CROSS = "positiveCross"`
`const String!`	`POST_LAYOUT = "postLayout"`
`const String!`	`TRIGGER_COLLISION_ID = "triggerCollisionId"`
`const String!`	`TRIGGER_COLLISION_VIEW = "triggerCollisionView"`
`const String!`	`TRIGGER_ID = "triggerID"`
`const String!`	`TRIGGER_RECEIVER = "triggerReceiver"`
`const String!`	`TRIGGER_SLACK = "triggerSlack"`
`const String!`	`VIEW_TRANSITION_ON_CROSS = "viewTransitionOnCross"`
`const String!`	`VIEW_TRANSITION_ON_NEGATIVE_CROSS = "viewTransitionOnNegativeCross"`
`const String!`	`VIEW_TRANSITION_ON_POSITIVE_CROSS = "viewTransitionOnPositiveCross"`

Public constructors
`KeyTrigger()`

Public functions
`Unit`	`addValues(splines: HashMap<String!, ViewSpline!>!)` Defines method to add a a view to splines derived form this key frame.
`Key!`	`clone()` Clone this KeyAttributes
`Unit`	`conditionallyFire(pos: Float, child: View!)` This fires the keyTriggers associated with this view at that position
`Key!`	`copy(src: Key!)` Copy the key
`Unit`	`getAttributeNames(attributes: HashSet<String!>!)`
`Unit`	`load(context: Context!, attrs: AttributeSet!)`
`Unit`	`setValue(tag: String!, value: Any!)` Set the value associated with this tag

Inherited Constants

From androidx.constraintlayout.motion.widget.Key

`const String!`	`ALPHA = "alpha"`
`const String!`	`CURVEFIT = "curveFit"`
`const String!`	`CUSTOM = "CUSTOM"`
`const String!`	`ELEVATION = "elevation"`
`const String!`	`MOTIONPROGRESS = "motionProgress"`
`const String!`	`PIVOT_X = "transformPivotX"`
`const String!`	`PIVOT_Y = "transformPivotY"`
`const String!`	`PROGRESS = "progress"`
`const String!`	`ROTATION = "rotation"`
`const String!`	`ROTATION_X = "rotationX"`
`const String!`	`ROTATION_Y = "rotationY"`
`const String!`	`SCALE_X = "scaleX"`
`const String!`	`SCALE_Y = "scaleY"`
`const String!`	`TRANSITIONEASING = "transitionEasing"`
`const String!`	`TRANSITION_PATH_ROTATE = "transitionPathRotate"`
`const String!`	`TRANSLATION_X = "translationX"`
`const String!`	`TRANSLATION_Y = "translationY"`
`const String!`	`TRANSLATION_Z = "translationZ"`
`const String!`	`VISIBILITY = "visibility"`
`const String!`	`WAVE_OFFSET = "waveOffset"`
`const String!`	`WAVE_PERIOD = "wavePeriod"`
`const String!`	`WAVE_PHASE = "wavePhase"`
`const String!`	`WAVE_VARIES_BY = "waveVariesBy"`

Inherited functions

From androidx.constraintlayout.motion.widget.Key

`Int`	`getFramePosition()` Gets the current frame position
`Unit`	`setFramePosition(pos: Int)` sets the frame position
`Unit`	`setInterpolation(interpolation: HashMap<String!, Int!>!)` Key frame can specify the type of interpolation it wants on various attributes For each string it set it to -1, CurveFit.LINEAR or CurveFit.SPLINE
`Key!`	`setViewId(id: Int)` set the id of the view

Inherited properties

From androidx.constraintlayout.motion.widget.Key

`java-static Int`	`UNSET`
`Int`	`mType`

Constants

CROSS

Added in 2.2.1

const val CROSS = "CROSS": String!

KEY_TYPE

Added in 2.2.1

const val KEY_TYPE = 5: Int

NEGATIVE_CROSS

Added in 2.2.1

const val NEGATIVE_CROSS = "negativeCross": String!

POSITIVE_CROSS

Added in 2.2.1

const val POSITIVE_CROSS = "positiveCross": String!

POST_LAYOUT

Added in 2.2.1

const val POST_LAYOUT = "postLayout": String!

TRIGGER_COLLISION_ID

Added in 2.2.1

const val TRIGGER_COLLISION_ID = "triggerCollisionId": String!

TRIGGER_COLLISION_VIEW

Added in 2.2.1

const val TRIGGER_COLLISION_VIEW = "triggerCollisionView": String!

TRIGGER_ID

Added in 2.2.1

const val TRIGGER_ID = "triggerID": String!

TRIGGER_RECEIVER

Added in 2.2.1

const val TRIGGER_RECEIVER = "triggerReceiver": String!

TRIGGER_SLACK

Added in 2.2.1

const val TRIGGER_SLACK = "triggerSlack": String!

VIEW_TRANSITION_ON_CROSS

Added in 2.2.1

const val VIEW_TRANSITION_ON_CROSS = "viewTransitionOnCross": String!

VIEW_TRANSITION_ON_NEGATIVE_CROSS

Added in 2.2.1

const val VIEW_TRANSITION_ON_NEGATIVE_CROSS = "viewTransitionOnNegativeCross": String!

VIEW_TRANSITION_ON_POSITIVE_CROSS

Added in 2.2.1

const val VIEW_TRANSITION_ON_POSITIVE_CROSS = "viewTransitionOnPositiveCross": String!

Public constructors

KeyTrigger

Added in 2.2.1

KeyTrigger()

Public functions

addValues

Added in 2.2.1

fun addValues(splines: HashMap<String!, ViewSpline!>!): Unit

Defines method to add a a view to splines derived form this key frame. The values are written to the spline

Parameters
`splines: HashMap<String!, ViewSpline!>!`	splines to write values to

clone

Added in 2.2.1

fun clone(): Key!

Clone this KeyAttributes

Returns
`Key!`

conditionallyFire

Added in 2.2.1

fun conditionallyFire(pos: Float, child: View!): Unit

This fires the keyTriggers associated with this view at that position

Parameters
`pos: Float`	the progress
`child: View!`	the view

fun copy(src: Key!): Key!

Copy the key

Parameters
`src: Key!`	to be copied

Returns
`Key!`	self

getAttributeNames

Added in 2.2.1

fun getAttributeNames(attributes: HashSet<String!>!): Unit

load

Added in 2.2.1

fun load(context: Context!, attrs: AttributeSet!): Unit

setValue

Added in 2.2.1

fun setValue(tag: String!, value: Any!): Unit

Set the value associated with this tag

Parameters
`tag: String!`
`value: Any!`