com.yworks.yfiles.layout

Class IsolatedGroupComponentLayout

java.lang.Object

com.yworks.yfiles.layout.AbstractLayoutStage

com.yworks.yfiles.layout.ComponentLayout

com.yworks.yfiles.layout.IsolatedGroupComponentLayout

All Implemented Interfaces:

ILayoutAlgorithm, ILayoutStage

public class IsolatedGroupComponentLayout
extends ComponentLayout

A special ComponentLayout implementation that allows to lay out isolated subgraphs within a group as separate components.

OrthogonalLayout uses this layout stage to arrange components.

Example of a hierarchically grouped graph with two components that are laid out by OrthogonalLayout as separate components.

Field Summary

Fields inherited from class com.yworks.yfiles.layout.ComponentLayout

AFFECTED_COMPONENTS_DPKEY, COMPONENT_ID_DPKEY

Constructor Summary

Constructors

Constructor and Description
IsolatedGroupComponentLayout() Creates an instance of IsolatedGroupComponentLayout with the given layout algorithm as core layout algorithm.
IsolatedGroupComponentLayout(ILayoutAlgorithm coreLayouter) Creates an instance of IsolatedGroupComponentLayout with the given layout algorithm as core layout algorithm.

Method Summary

Modifier and Type	Method and Description
void	applyLayout(LayoutGraph graph) Calculates the layout based on the current core layout algorithm.
protected int	findIsolatedGraphComponents(LayoutGraph graph, INodeMap compNumber) Determines the nodes that belong to the same graph component.

Methods inherited from class com.yworks.yfiles.layout.ComponentLayout

arrangeComponents, arrangeFields, calculateBounds, findGraphComponents, getComponentSpacing, getGridSpacing, getPreferredSize, getStyle, isComponentArrangementEnabled, isGroupingConsiderationEnabled, isLabelConsiderationEnabled, setComponentArrangementEnabled, setComponentSpacing, setGridSpacing, setGroupingConsiderationEnabled, setLabelConsiderationEnabled, setOrigin, setPreferredSize, setStyle

Methods inherited from class com.yworks.yfiles.layout.AbstractLayoutStage

applyLayoutCore, getCoreLayout, setCoreLayout

Methods inherited from class java.lang.Object

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

Constructor Detail

IsolatedGroupComponentLayout

public IsolatedGroupComponentLayout()

Creates an instance of IsolatedGroupComponentLayout with the given layout algorithm as core layout algorithm.

IsolatedGroupComponentLayout

public IsolatedGroupComponentLayout(ILayoutAlgorithm coreLayouter)

Creates an instance of IsolatedGroupComponentLayout with the given layout algorithm as core layout algorithm.

Parameters:

coreLayouter - the core layout algorithm that will be invoked for each component of the graph

Method Detail

applyLayout

public void applyLayout(LayoutGraph graph)

Calculates the layout based on the current core layout algorithm.

Before calling the core layout algorithm, the IsolatedGroupComponentLayout identifies the isolated subgraphs within a group and treats them as separate components.

Specified by:

applyLayout in interface ILayoutAlgorithm

Overrides:

applyLayout in class ComponentLayout

The given graph will not be copied during the layout process and the layout will be immediately applied to the given graph.

Parameters:

graph - the input graph

findIsolatedGraphComponents

protected int findIsolatedGraphComponents(LayoutGraph graph,
                                          INodeMap compNumber)

Determines the nodes that belong to the same graph component.

Unlike ComponentLayout, this implementation additionally identifies isolated subgraphs within a group as separate components.

Parameters:

graph - the input graph

compNumber - the INodeMap that will be filled by the layout algorithm, such that it contains the zero-based index of the component number to which each node belongs

Returns:

the number of separate components