ChainHead

Artifact: androidx.constraintlayout:constraintlayout-core

Added in 1.1.1

Kotlin |Java

public class ChainHead

Class to represent a chain by its main elements.

Summary

Protected fields
`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(ConstraintWidget first, int orientation, boolean isRtl)` Initialize variables, then determine visible widgets, the head of chain and matched constraint widgets.

Public methods
`void`	`define()`
`ConstraintWidget`	`getFirst()`
`ConstraintWidget`	`getFirstMatchConstraintWidget()`
`ConstraintWidget`	`getFirstVisibleWidget()`
`ConstraintWidget`	`getHead()`
`ConstraintWidget`	`getLast()`
`ConstraintWidget`	`getLastMatchConstraintWidget()`
`ConstraintWidget`	`getLastVisibleWidget()`
`float`	`getTotalWeight()`

Protected fields

mFirst

Added in 1.1.1

protected ConstraintWidget mFirst

mFirstMatchConstraintWidget

Added in 1.1.1

protected ConstraintWidget mFirstMatchConstraintWidget

mFirstVisibleWidget

Added in 1.1.1

protected ConstraintWidget mFirstVisibleWidget

mHasComplexMatchWeights

Added in 1.1.1

protected boolean mHasComplexMatchWeights

mHasDefinedWeights

Added in 1.1.1

protected boolean mHasDefinedWeights

mHasRatio

Added in 1.1.1

protected boolean mHasRatio

mHasUndefinedWeights

Added in 1.1.1

protected boolean mHasUndefinedWeights

mHead

Added in 1.1.1

protected ConstraintWidget mHead

mLast

Added in 1.1.1

protected ConstraintWidget mLast

mLastMatchConstraintWidget

Added in 1.1.1

protected ConstraintWidget mLastMatchConstraintWidget

mLastVisibleWidget

Added in 1.1.1

protected ConstraintWidget mLastVisibleWidget

mTotalWeight

Added in 1.1.1

protected float mTotalWeight

mWeightedMatchConstraintsWidgets

Added in 1.1.1

protected ArrayList<ConstraintWidget> mWeightedMatchConstraintsWidgets

mWidgetsCount

Added in 1.1.1

protected int mWidgetsCount

mWidgetsMatchCount

Added in 1.1.1

protected int mWidgetsMatchCount

Public constructors

ChainHead

Added in 1.1.1

public ChainHead(ConstraintWidget first, int orientation, boolean isRtl)

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

Parameters
`ConstraintWidget first`	first widget in a chain
`int orientation`	orientation of the chain (either Horizontal or Vertical)
`boolean isRtl`	Right-to-left layout flag to determine the actual head of the chain

Public methods

define

Added in 1.1.1

public void define()

getFirst

Added in 1.1.1

public ConstraintWidget getFirst()

getFirstMatchConstraintWidget

Added in 1.1.1

public ConstraintWidget getFirstMatchConstraintWidget()

getFirstVisibleWidget

Added in 1.1.1

public ConstraintWidget getFirstVisibleWidget()

getHead

Added in 1.1.1

public ConstraintWidget getHead()

getLast

Added in 1.1.1

public ConstraintWidget getLast()

getLastMatchConstraintWidget

Added in 1.1.1

public ConstraintWidget getLastMatchConstraintWidget()

getLastVisibleWidget

Added in 1.1.1

public ConstraintWidget getLastVisibleWidget()

getTotalWeight

Added in 1.1.1

public float getTotalWeight()