ChainHead

Artifact: androidx.constraintlayout:constraintlayout-core

View Source

Added in 1.1.0-alpha13

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Kotlin |Java

class ChainHead

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Class to represent a chain by its main elements.

Summary

Public constructors
ChainHead(first: ConstraintWidget!, orientation: Int, isRtl: Boolean) Initialize variables, then determine visible widgets, the head of chain and matched constraint widgets.

Public functions
Unit	define()
ConstraintWidget!	getFirst()
ConstraintWidget!	getFirstMatchConstraintWidget()
ConstraintWidget!	getFirstVisibleWidget()
ConstraintWidget!	getHead()
ConstraintWidget!	getLast()
ConstraintWidget!	getLastMatchConstraintWidget()
ConstraintWidget!	getLastVisibleWidget()
Float	getTotalWeight()

Protected properties
ConstraintWidget!	mFirst
ConstraintWidget!	mFirstMatchConstraintWidget
ConstraintWidget!	mFirstVisibleWidget
Boolean	mHasComplexMatchWeights
Boolean	mHasDefinedWeights
Boolean	mHasRatio
Boolean	mHasUndefinedWeights
ConstraintWidget!	mHead
ConstraintWidget!	mLast
ConstraintWidget!	mLastMatchConstraintWidget
ConstraintWidget!	mLastVisibleWidget
Float	mTotalWeight
ArrayList<ConstraintWidget!>!	mWeightedMatchConstraintsWidgets
Int	mWidgetsCount
Int	mWidgetsMatchCount

Public constructors

ChainHead

Added in 1.1.0-alpha13

ChainHead(first: ConstraintWidget!, orientation: Int, isRtl: Boolean)

Initialize variables, then determine visible widgets, the head of chain and matched constraint widgets.

Parameters
first: ConstraintWidget!	first widget in a chain
orientation: Int	orientation of the chain (either Horizontal or Vertical)
isRtl: Boolean	Right-to-left layout flag to determine the actual head of the chain

Public functions

define

Added in 1.1.0-alpha13

fun define(): Unit

getFirst

Added in 1.1.0-alpha13

fun getFirst(): ConstraintWidget!

getFirstMatchConstraintWidget

Added in 1.1.0-alpha13

fun getFirstMatchConstraintWidget(): ConstraintWidget!

getFirstVisibleWidget

Added in 1.1.0-alpha13

fun getFirstVisibleWidget(): ConstraintWidget!

getHead

Added in 1.1.0-alpha13

fun getHead(): ConstraintWidget!

getLast

Added in 1.1.0-alpha13

fun getLast(): ConstraintWidget!

getLastMatchConstraintWidget

Added in 1.1.0-alpha13

fun getLastMatchConstraintWidget(): ConstraintWidget!

getLastVisibleWidget

Added in 1.1.0-alpha13

fun getLastVisibleWidget(): ConstraintWidget!

getTotalWeight

Added in 1.1.0-alpha13

fun getTotalWeight(): Float

Protected properties

mFirst

Added in 1.1.0-alpha13

protected val mFirst: ConstraintWidget!

mFirstMatchConstraintWidget

Added in 1.1.0-alpha13

protected val mFirstMatchConstraintWidget: ConstraintWidget!

mFirstVisibleWidget

Added in 1.1.0-alpha13

protected val mFirstVisibleWidget: ConstraintWidget!

mHasComplexMatchWeights

Added in 1.1.0-alpha13

protected val mHasComplexMatchWeights: Boolean

mHasDefinedWeights

Added in 1.1.0-alpha13

protected val mHasDefinedWeights: Boolean

mHasRatio

Added in 1.1.0-alpha13

protected val mHasRatio: Boolean

mHasUndefinedWeights

Added in 1.1.0-alpha13

protected val mHasUndefinedWeights: Boolean

mHead

Added in 1.1.0-alpha13

protected val mHead: ConstraintWidget!

mLast

Added in 1.1.0-alpha13

protected val mLast: ConstraintWidget!

mLastMatchConstraintWidget

Added in 1.1.0-alpha13

protected val mLastMatchConstraintWidget: ConstraintWidget!

mLastVisibleWidget

Added in 1.1.0-alpha13

protected val mLastVisibleWidget: ConstraintWidget!

mTotalWeight

Added in 1.1.0-alpha13

protected val mTotalWeight: Float

mWeightedMatchConstraintsWidgets

Added in 1.1.0-alpha13

protected val mWeightedMatchConstraintsWidgets: ArrayList<ConstraintWidget!>!

mWidgetsCount

Added in 1.1.0-alpha13

protected val mWidgetsCount: Int

mWidgetsMatchCount

Added in 1.1.0-alpha13

protected val mWidgetsMatchCount: Int