androidx.constraintlayout.core.widgets.analyzer

Class Direct

java.lang.Object

androidx.constraintlayout.core.widgets.analyzer.Direct

public class Direct
extends java.lang.Object

Direct resolution engine This walks through the graph of dependencies and infer final position. This allows us to skip the linear solver in many situations, as well as skipping intermediate measure passes. Widgets are solved independently in horizontal and vertical. Any widgets not fully resolved will be computed later on by the linear solver.

Constructor Summary

Constructors

Constructor and Description
Direct()

Method Summary

Modifier and Type	Method and Description
static java.lang.String	ls(int level) Small utility function to indent logs depending on the level
static boolean	solveChain(ConstraintWidgetContainer container, LinearSystem system, int orientation, int offset, ChainHead chainHead, boolean isChainSpread, boolean isChainSpreadInside, boolean isChainPacked) Try to directly resolve the chain
static void	solvingPass(ConstraintWidgetContainer layout, BasicMeasure.Measurer measurer) Walk the dependency graph and solves it.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Direct

public Direct()

Method Detail

solvingPass

public static void solvingPass(ConstraintWidgetContainer layout,
                               BasicMeasure.Measurer measurer)

Walk the dependency graph and solves it.

Parameters:

layout - the container we want to optimize

measurer - the measurer used to measure the widget

ls

public static java.lang.String ls(int level)

Small utility function to indent logs depending on the level

Parameters:

level -

Returns:

a formatted string for the indentation

solveChain

public static boolean solveChain(ConstraintWidgetContainer container,
                                 LinearSystem system,
                                 int orientation,
                                 int offset,
                                 ChainHead chainHead,
                                 boolean isChainSpread,
                                 boolean isChainSpreadInside,
                                 boolean isChainPacked)

Try to directly resolve the chain

Parameters:

container -

system -

orientation -

offset -

chainHead -

isChainSpread -

isChainSpreadInside -

isChainPacked -

Returns:

true if fully resolved