Class AbstractGraphModel

java.lang.Object

com.codename1.graph.AbstractGraphModel

All Implemented Interfaces:

GraphModel

Direct Known Subclasses:

DefaultGraphModel

public abstract class AbstractGraphModel
extends Object
implements GraphModel

The listener list, the lookups and the refusals every read-only model shares.

A subclass supplies getNodes, getEdges and getGroups. Every edit is refused until the matching method is overridden.

Constructor Summary

Constructors

Constructor	Description
AbstractGraphModel()

Method Summary

Modifier and Type	Method	Description
void	addChangeListener(GraphChangeListener l)	Adds a listener told about every change.
GraphEdge	connect(GraphNode source, GraphPort sourcePort, GraphNode target, GraphPort targetPort)	Makes an edge from one node or port to another.
protected void	fireChanged()	Tells every listener the model changed.
GraphGroup	getGroup(String id)	The group with this id, or null.
GraphNode	getNode(String id)	The node with this id, or null.
boolean	moveNode(GraphNode node, double x, double y)	Moves a node to a world position.
void	removeChangeListener(GraphChangeListener l)	Removes a listener.
boolean	removeEdge(GraphEdge edge)	Removes an edge.
boolean	removeNode(GraphNode node)	Removes a node and every edge that touches it.
boolean	renameNode(GraphNode node, String label)	Gives a node a new label.
boolean	setCollapsed(GraphGroup group, boolean collapsed)	Collapses or expands a group.

Methods inherited from class Object

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

Methods inherited from interface GraphModel

getEdges, getGroups, getNodes

Constructor Details

AbstractGraphModel

public AbstractGraphModel()

Method Details

getNode

public GraphNode getNode(String id)

Description copied from interface: GraphModel

The node with this id, or null.

Specified by:

getNode in interface GraphModel

getGroup

public GraphGroup getGroup(String id)

Description copied from interface: GraphModel

The group with this id, or null.

Specified by:

getGroup in interface GraphModel

moveNode

public boolean moveNode(GraphNode node,
 double x,
 double y)

Description copied from interface: GraphModel

Moves a node to a world position.

Returns

false when the model refuses the move

Specified by:

moveNode in interface GraphModel

connect

public GraphEdge connect(GraphNode source,
 GraphPort sourcePort,
 GraphNode target,
 GraphPort targetPort)

Description copied from interface: GraphModel

Makes an edge from one node or port to another.

Parameters

• source: the node the edge leaves
• sourcePort: its output port, or null
• target: the node the edge enters
• targetPort: its input port, or null

Returns

the new edge, or null when the model refuses it

Specified by:

connect in interface GraphModel

removeEdge

public boolean removeEdge(GraphEdge edge)

Description copied from interface: GraphModel

Removes an edge.

Returns

false when the model refuses

Specified by:

removeEdge in interface GraphModel

removeNode

public boolean removeNode(GraphNode node)

Description copied from interface: GraphModel

Removes a node and every edge that touches it.

Returns

false when the model refuses

Specified by:

removeNode in interface GraphModel

renameNode

public boolean renameNode(GraphNode node,
 String label)

Description copied from interface: GraphModel

Gives a node a new label.

Returns

false when the model refuses

Specified by:

renameNode in interface GraphModel

setCollapsed

public boolean setCollapsed(GraphGroup group,
 boolean collapsed)

Description copied from interface: GraphModel

Collapses or expands a group.

Returns

false when the model refuses

Specified by:

setCollapsed in interface GraphModel

addChangeListener

public void addChangeListener(GraphChangeListener l)

Description copied from interface: GraphModel

Adds a listener told about every change.

Specified by:

addChangeListener in interface GraphModel

removeChangeListener

public void removeChangeListener(GraphChangeListener l)

Description copied from interface: GraphModel

Removes a listener.

Specified by:

removeChangeListener in interface GraphModel

fireChanged

protected void fireChanged()

Tells every listener the model changed.