ChainHead

Artifact: androidx.constraintlayout:constraintlayout-core

View Source

Added in 1.1.0-alpha14

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Kotlin |Java

public class ChainHead

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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 1.1.0-alpha14

protected ConstraintWidget mFirst

mFirstMatchConstraintWidget

Added in 1.1.0-alpha14

protected ConstraintWidget mFirstMatchConstraintWidget

mFirstVisibleWidget

Added in 1.1.0-alpha14

protected ConstraintWidget mFirstVisibleWidget

mHasComplexMatchWeights

Added in 1.1.0-alpha14

protected boolean mHasComplexMatchWeights

mHasDefinedWeights

Added in 1.1.0-alpha14

protected boolean mHasDefinedWeights

mHasRatio

Added in 1.1.0-alpha14

protected boolean mHasRatio

mHasUndefinedWeights

Added in 1.1.0-alpha14

protected boolean mHasUndefinedWeights

mHead

Added in 1.1.0-alpha14

protected ConstraintWidget mHead

mLast

Added in 1.1.0-alpha14

protected ConstraintWidget mLast

mLastMatchConstraintWidget

Added in 1.1.0-alpha14

protected ConstraintWidget mLastMatchConstraintWidget

mLastVisibleWidget

Added in 1.1.0-alpha14

protected ConstraintWidget mLastVisibleWidget

mTotalWeight

Added in 1.1.0-alpha14

protected float mTotalWeight

mWeightedMatchConstraintsWidgets

Added in 1.1.0-alpha14

protected ArrayList<ConstraintWidget> mWeightedMatchConstraintsWidgets

mWidgetsCount

Added in 1.1.0-alpha14

protected int mWidgetsCount

mWidgetsMatchCount

Added in 1.1.0-alpha14

protected int mWidgetsMatchCount

Public constructors

ChainHead

Added in 1.1.0-alpha14

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 1.1.0-alpha14

public void define()

getFirst

Added in 1.1.0-alpha14

public ConstraintWidget getFirst()

getFirstMatchConstraintWidget

Added in 1.1.0-alpha14

public ConstraintWidget getFirstMatchConstraintWidget()

getFirstVisibleWidget

Added in 1.1.0-alpha14

public ConstraintWidget getFirstVisibleWidget()

getHead

Added in 1.1.0-alpha14

public ConstraintWidget getHead()

getLast

Added in 1.1.0-alpha14

public ConstraintWidget getLast()

getLastMatchConstraintWidget

Added in 1.1.0-alpha14

public ConstraintWidget getLastMatchConstraintWidget()

getLastVisibleWidget

Added in 1.1.0-alpha14

public ConstraintWidget getLastVisibleWidget()

getTotalWeight

Added in 1.1.0-alpha14

public float getTotalWeight()