org.activiti.bpmn

Class BPMNLayout

java.lang.Object

com.mxgraph.layout.mxGraphLayout

org.activiti.bpmn.BPMNLayout

All Implemented Interfaces:

com.mxgraph.layout.mxIGraphLayout

public class BPMNLayout
extends com.mxgraph.layout.mxGraphLayout

BPMNLayout

Author:

Shi Yaoqiang(shi_yaoqiang@yahoo.com)

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
protected static class	BPMNLayout.Polygon
protected static class	BPMNLayout.Polyline
protected static class	BPMNLayout.TreeNode

Field Summary

Fields

Modifier and Type	Field and Description
protected BpmnAutoLayout	bpmnAutoLayout
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 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 boolean	resetEdges Specifies if all edge points of traversed edges should be removed.
protected boolean	resizeParent If the parent should be resized to match the width/height of the tree.

Fields inherited from class com.mxgraph.layout.mxGraphLayout

graph, parent, useBoundingBox

Constructor Summary

Constructors

Constructor and Description
BPMNLayout(com.mxgraph.view.mxGraph graph)
BPMNLayout(com.mxgraph.view.mxGraph graph, boolean horizontal)
BPMNLayout(com.mxgraph.view.mxGraph graph, boolean horizontal, boolean invert)

Method Summary

Methods

Modifier and Type	Method and Description
protected com.mxgraph.util.mxRectangle	apply(BPMNLayout.TreeNode node, com.mxgraph.util.mxRectangle bounds)
protected void	attachParent(BPMNLayout.TreeNode node, double height)
protected BPMNLayout.Polyline	bridge(BPMNLayout.Polyline line1, double x1, double y1, BPMNLayout.Polyline line2, double x2, double y2)
protected BPMNLayout.Polyline	createLine(double dx, double dy, BPMNLayout.Polyline next)
protected BPMNLayout.TreeNode	createNode(Object cell)
protected BPMNLayout.TreeNode	dfs(Object cell, Object parent, Set<Object> visited) Does a depth first search starting at the specified cell.
void	execute(Object parent)
com.mxgraph.view.mxGraph	getGraph()
int	getLevelDistance()
int	getNodeDistance()
protected com.mxgraph.util.mxRectangle	horizontalLayout(BPMNLayout.TreeNode node, double x0, double y0, com.mxgraph.util.mxRectangle bounds)
protected boolean	isBoundaryEvent(Object obj)
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(BPMNLayout.TreeNode node)
protected void	layout(BPMNLayout.TreeNode node) Starts the actual compact tree layout algorithm at the given node.
protected void	layoutLeaf(BPMNLayout.TreeNode node)
protected double	merge(BPMNLayout.Polygon p1, BPMNLayout.Polygon p2)
protected void	moveNode(BPMNLayout.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)
void	setBpmnAutoLayout(BpmnAutoLayout bpmnAutoLayout)
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 com.mxgraph.util.mxRectangle	verticalLayout(BPMNLayout.TreeNode node, Object parent, double x0, double y0, com.mxgraph.util.mxRectangle bounds)

Methods inherited from class com.mxgraph.layout.mxGraphLayout

arrangeGroups, getConstraint, getConstraint, 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

bpmnAutoLayout

protected BpmnAutoLayout bpmnAutoLayout

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 parent should be resized to match the width/height of the tree. Default is true.

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 true.

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 40.

nodeDistance

protected int nodeDistance

Holds the nodeDistance. Default is 20.

Constructor Detail

BPMNLayout

public BPMNLayout(com.mxgraph.view.mxGraph graph)

Parameters:

graph -

BPMNLayout

public BPMNLayout(com.mxgraph.view.mxGraph graph,
          boolean horizontal)

Parameters:

graph -

horizontal -

BPMNLayout

public BPMNLayout(com.mxgraph.view.mxGraph graph,
          boolean horizontal,
          boolean invert)

Parameters:

graph -

horizontal -

invert -

Method Detail

setBpmnAutoLayout

public void setBpmnAutoLayout(BpmnAutoLayout bpmnAutoLayout)

getGraph

public com.mxgraph.view.mxGraph getGraph()

Overrides:

getGraph in class com.mxgraph.layout.mxGraphLayout

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 com.mxgraph.layout.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

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

execute

public void execute(Object parent)

Specified by:

execute in interface com.mxgraph.layout.mxIGraphLayout

Overrides:

execute in class com.mxgraph.layout.mxGraphLayout

isBoundaryEvent

protected boolean isBoundaryEvent(Object obj)

moveNode

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

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

dfs

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

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

layout

protected void layout(BPMNLayout.TreeNode node)

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

horizontalLayout

protected com.mxgraph.util.mxRectangle horizontalLayout(BPMNLayout.TreeNode node,
                                            double x0,
                                            double y0,
                                            com.mxgraph.util.mxRectangle bounds)

verticalLayout

protected com.mxgraph.util.mxRectangle verticalLayout(BPMNLayout.TreeNode node,
                                          Object parent,
                                          double x0,
                                          double y0,
                                          com.mxgraph.util.mxRectangle bounds)

attachParent

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

layoutLeaf

protected void layoutLeaf(BPMNLayout.TreeNode node)

join

protected double join(BPMNLayout.TreeNode node)

merge

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

offset

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

bridge

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

createNode

protected BPMNLayout.TreeNode createNode(Object cell)

apply

protected com.mxgraph.util.mxRectangle apply(BPMNLayout.TreeNode node,
                                 com.mxgraph.util.mxRectangle bounds)

createLine

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