com.mxgraph.layout
Class mxCompactTreeLayout

java.lang.Object
  com.mxgraph.layout.mxGraphLayout
      com.mxgraph.layout.mxCompactTreeLayout

All Implemented Interfaces:

mxIGraphLayout

public class mxCompactTreeLayout
extends mxGraphLayout

Nested Class Summary

protected static class	mxCompactTreeLayout.Polygon
protected static class	mxCompactTreeLayout.Polyline
protected static class	mxCompactTreeLayout.TreeNode
protected class	mxCompactTreeLayout.WeightedCellSorter A utility class used to track cells whilst sorting occurs on the weighted sum of their connected edges.

Field Summary

protected int	channelBuffer The size of the vertical buffer in the center of inter-rank channels where edge control points should not be placed
protected boolean	edgeRouting Whether or not to apply the internal tree edge routing
protected int	groupPadding Padding added to resized parents
protected boolean	horizontal Specifies the orientation of the layout.
protected boolean	invert Specifies if edge directions should be inverted.
protected int	levelDistance Holds the levelDistance.
protected int	minEdgeJetty The minimum distance for an edge jetty from a vertex
protected boolean	moveTree Specifies if the tree should be moved to the top, left corner if it is inside a top-level layer.
protected int	nodeDistance Holds the nodeDistance.
protected Set<Object>	parentsChanged A set of the parents that need updating based on children process as part of the layout
protected int	prefHozEdgeSep The preferred horizontal distance between edges exiting a vertex
protected int	prefVertEdgeOff The preferred vertical offset between edges exiting a vertex
protected boolean	resetEdges Specifies if all edge points of traversed edges should be removed.
protected boolean	resizeParent If the parents should be resized to match the width/height of the children.

Fields inherited from class com.mxgraph.layout.mxGraphLayout

graph, parent, useBoundingBox

Constructor Summary

mxCompactTreeLayout(mxGraph graph)

mxCompactTreeLayout(mxGraph graph, boolean horizontal)

mxCompactTreeLayout(mxGraph graph, boolean horizontal, boolean invert)

Method Summary

protected void	adjustParents() Adjust parent cells whose child geometries have changed.
protected mxRectangle	apply(mxCompactTreeLayout.TreeNode node, mxRectangle bounds)
protected void	attachParent(mxCompactTreeLayout.TreeNode node, double height)
protected mxCompactTreeLayout.Polyline	bridge(mxCompactTreeLayout.Polyline line1, double x1, double y1, mxCompactTreeLayout.Polyline line2, double x2, double y2)
protected mxCompactTreeLayout.Polyline	createLine(double dx, double dy, mxCompactTreeLayout.Polyline next)
protected mxCompactTreeLayout.TreeNode	createNode(Object cell)
protected mxCompactTreeLayout.TreeNode	dfs(Object cell, Object parent, Set<Object> visited) Does a depth first search starting at the specified cell.
void	execute(Object parent) Executes the layout for the children of the specified parent.
void	execute(Object parent, Object root) Implements .
List<Object>	findTreeRoots(Object parent, boolean invert) Returns all visible children in the given parent which do not have incoming edges.
double	getGroupPadding()
int	getLevelDistance()
int	getNodeDistance()
protected mxRectangle	horizontalLayout(mxCompactTreeLayout.TreeNode node, double x0, double y0, mxRectangle bounds)
boolean	isEdgeRouting()
boolean	isHorizontal()
boolean	isInvert()
boolean	isMoveTree()
boolean	isResetEdges()
boolean	isResizeParent()
boolean	isVertexIgnored(Object vertex) Returns a boolean indicating if the given should be ignored as a vertex.
protected double	join(mxCompactTreeLayout.TreeNode node)
protected void	layout(mxCompactTreeLayout.TreeNode node) Starts the actual compact tree layout algorithm at the given node.
protected void	layoutLeaf(mxCompactTreeLayout.TreeNode node)
protected void	localEdgeProcessing(mxCompactTreeLayout.TreeNode node) Moves the specified node and all of its children by the given amount.
protected double	merge(mxCompactTreeLayout.Polygon p1, mxCompactTreeLayout.Polygon p2)
protected void	moveNode(mxCompactTreeLayout.TreeNode node, double dx, double dy) Moves the specified node and all of its children by the given amount.
protected double	offset(double p1, double p2, double a1, double a2, double b1, double b2)
protected void	processNodeOutgoing(mxCompactTreeLayout.TreeNode node) Separates the x position of edges as they connect to vertices
void	setEdgeRouting(boolean edgeRouting)
void	setGroupPadding(int groupPadding)
void	setHorizontal(boolean horizontal)
void	setInvert(boolean invert)
void	setLevelDistance(int levelDistance)
void	setMoveTree(boolean moveTree)
void	setNodeDistance(int nodeDistance)
void	setResetEdges(boolean resetEdges)
void	setResizeParent(boolean resizeParent)
protected mxRectangle	verticalLayout(mxCompactTreeLayout.TreeNode node, Object parent, double x0, double y0, mxRectangle bounds)

Methods inherited from class com.mxgraph.layout.mxGraphLayout

arrangeGroups, getConstraint, getConstraint, getGraph, getParentOffset, getVertexBounds, isEdgeIgnored, isUseBoundingBox, isVertexMovable, moveCell, setEdgePoints, setEdgeStyleEnabled, setOrthogonalEdge, setUseBoundingBox, setVertexLocation

Methods inherited from class java.lang.Object

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

Field Detail

horizontal

protected boolean horizontal

Specifies the orientation of the layout. Default is true.

invert

protected boolean invert

Specifies if edge directions should be inverted. Default is false.

resizeParent

protected boolean resizeParent

If the parents should be resized to match the width/height of the children. Default is true.

groupPadding

protected int groupPadding

Padding added to resized parents

parentsChanged

protected Set<Object> parentsChanged

A set of the parents that need updating based on children process as part of the layout

moveTree

protected boolean moveTree

Specifies if the tree should be moved to the top, left corner if it is inside a top-level layer. Default is false.

resetEdges

protected boolean resetEdges

Specifies if all edge points of traversed edges should be removed. Default is true.

levelDistance

protected int levelDistance

Holds the levelDistance. Default is 10.

nodeDistance

protected int nodeDistance

Holds the nodeDistance. Default is 20.

prefHozEdgeSep

protected int prefHozEdgeSep

The preferred horizontal distance between edges exiting a vertex

prefVertEdgeOff

protected int prefVertEdgeOff

The preferred vertical offset between edges exiting a vertex

minEdgeJetty

protected int minEdgeJetty

The minimum distance for an edge jetty from a vertex

channelBuffer

protected int channelBuffer

The size of the vertical buffer in the center of inter-rank channels where edge control points should not be placed

edgeRouting

protected boolean edgeRouting

Whether or not to apply the internal tree edge routing

Constructor Detail

mxCompactTreeLayout

public mxCompactTreeLayout(mxGraph graph)

Parameters:

graph -

mxCompactTreeLayout

public mxCompactTreeLayout(mxGraph graph,
                           boolean horizontal)

Parameters:

graph -

horizontal -

mxCompactTreeLayout

public mxCompactTreeLayout(mxGraph graph,
                           boolean horizontal,
                           boolean invert)

Parameters:

graph -

horizontal -

invert -

Method Detail

isVertexIgnored

public boolean isVertexIgnored(Object vertex)

Returns a boolean indicating if the given should be ignored as a vertex. This returns true if the cell has no connections.

Overrides:

isVertexIgnored in class mxGraphLayout

Parameters:

vertex - Object that represents the vertex to be tested.

Returns:

Returns true if the vertex should be ignored.

isHorizontal

public boolean isHorizontal()

Returns:

the horizontal

setHorizontal

public void setHorizontal(boolean horizontal)

Parameters:

horizontal - the horizontal to set

isInvert

public boolean isInvert()

Returns:

the invert

setInvert

public void setInvert(boolean invert)

Parameters:

invert - the invert to set

isResizeParent

public boolean isResizeParent()

Returns:

the resizeParent

setResizeParent

public void setResizeParent(boolean resizeParent)

Parameters:

resizeParent - the resizeParent to set

isMoveTree

public boolean isMoveTree()

Returns:

the moveTree

setMoveTree

public void setMoveTree(boolean moveTree)

Parameters:

moveTree - the moveTree to set

isResetEdges

public boolean isResetEdges()

Returns:

the resetEdges

setResetEdges

public void setResetEdges(boolean resetEdges)

Parameters:

resetEdges - the resetEdges to set

isEdgeRouting

public boolean isEdgeRouting()

setEdgeRouting

public void setEdgeRouting(boolean edgeRouting)

getLevelDistance

public int getLevelDistance()

Returns:

the levelDistance

setLevelDistance

public void setLevelDistance(int levelDistance)

Parameters:

levelDistance - the levelDistance to set

getNodeDistance

public int getNodeDistance()

Returns:

the nodeDistance

setNodeDistance

public void setNodeDistance(int nodeDistance)

Parameters:

nodeDistance - the nodeDistance to set

getGroupPadding

public double getGroupPadding()

setGroupPadding

public void setGroupPadding(int groupPadding)

execute

public void execute(Object parent)

Description copied from interface: mxIGraphLayout

Executes the layout for the children of the specified parent.

Specified by:

execute in interface mxIGraphLayout

Overrides:

execute in class mxGraphLayout

Parameters:

parent - Parent cell that contains the children to be layed out.

execute

public void execute(Object parent,
                    Object root)

Implements . If the parent has any connected edges, then it is used as the root of the tree. Else, will be used to find a suitable root node within the set of children of the given parent.

findTreeRoots

public List<Object> findTreeRoots(Object parent,
                                  boolean invert)

Returns all visible children in the given parent which do not have incoming edges. If the result is empty then the children with the maximum difference between incoming and outgoing edges are returned. This takes into account edges that are being promoted to the given root due to invisible children or collapsed cells.

Parameters:

parent - Cell whose children should be checked.

invert - Specifies if outgoing or incoming edges should be counted for a tree root. If false then outgoing edges will be counted.

Returns:

List of tree roots in parent.

moveNode

protected void moveNode(mxCompactTreeLayout.TreeNode node,
                        double dx,
                        double dy)

Moves the specified node and all of its children by the given amount.

dfs

protected mxCompactTreeLayout.TreeNode dfs(Object cell,
                                           Object parent,
                                           Set<Object> visited)

Does a depth first search starting at the specified cell. Makes sure the specified parent is never left by the algorithm.

layout

protected void layout(mxCompactTreeLayout.TreeNode node)

Starts the actual compact tree layout algorithm at the given node.

horizontalLayout

protected mxRectangle horizontalLayout(mxCompactTreeLayout.TreeNode node,
                                       double x0,
                                       double y0,
                                       mxRectangle bounds)

verticalLayout

protected mxRectangle verticalLayout(mxCompactTreeLayout.TreeNode node,
                                     Object parent,
                                     double x0,
                                     double y0,
                                     mxRectangle bounds)

attachParent

protected void attachParent(mxCompactTreeLayout.TreeNode node,
                            double height)

layoutLeaf

protected void layoutLeaf(mxCompactTreeLayout.TreeNode node)

join

protected double join(mxCompactTreeLayout.TreeNode node)

merge

protected double merge(mxCompactTreeLayout.Polygon p1,
                       mxCompactTreeLayout.Polygon p2)

offset

protected double offset(double p1,
                        double p2,
                        double a1,
                        double a2,
                        double b1,
                        double b2)

bridge

protected mxCompactTreeLayout.Polyline bridge(mxCompactTreeLayout.Polyline line1,
                                              double x1,
                                              double y1,
                                              mxCompactTreeLayout.Polyline line2,
                                              double x2,
                                              double y2)

createNode

protected mxCompactTreeLayout.TreeNode createNode(Object cell)

apply

protected mxRectangle apply(mxCompactTreeLayout.TreeNode node,
                            mxRectangle bounds)

Parameters:

node -

bounds -

Returns:

createLine

protected mxCompactTreeLayout.Polyline createLine(double dx,
                                                  double dy,
                                                  mxCompactTreeLayout.Polyline next)

adjustParents

protected void adjustParents()

Adjust parent cells whose child geometries have changed. The default implementation adjusts the group to just fit around the children with a padding.

localEdgeProcessing

protected void localEdgeProcessing(mxCompactTreeLayout.TreeNode node)

Moves the specified node and all of its children by the given amount.

processNodeOutgoing

protected void processNodeOutgoing(mxCompactTreeLayout.TreeNode node)

Separates the x position of edges as they connect to vertices

Parameters:

node - the root node of the tree