com.horstmann.violet.framework
Class AbstractNode

java.lang.Object
  com.horstmann.violet.framework.AbstractNode

All Implemented Interfaces:

Node, java.io.Serializable, java.lang.Cloneable

Direct Known Subclasses:

PointNode, RectangularNode

public abstract class AbstractNode
extends java.lang.Object
implements Node

A class that supplies convenience implementations for a number of methods in the Node interface

See Also:

Serialized Form

Field Summary

static int

SHADOW_GAP

Constructor Summary

AbstractNode()
Constructs a node with no parents or children.

Method Summary

void	addChild(int index, Node node) Adds a child node.
void	addChild(Node node)
boolean	addEdge(Edge e, java.awt.geom.Point2D p1, java.awt.geom.Point2D p2) Adds an edge that originates at this node.
boolean	addNode(Node n, java.awt.geom.Point2D p) Adds a node as a child node to this node.
java.lang.Object	clone()
void	draw(java.awt.Graphics2D g2) Draw the node.
java.util.List	getChildren() Gets the children of this node.
Node	getParent() Gets the parent of this node.
java.awt.Shape	getShape()
void	layout(Graph g, java.awt.Graphics2D g2, Grid grid) Lays out the node and its children.
void	removeChild(Node node) Removes a child node.
void	removeEdge(Graph g, Edge e) Notifies this node that an edge is being removed.
void	removeNode(Graph g, Node e) Notifies this node that a node is being removed.
void	setParent(Node node) Sets the parent of this node.
static void	setPersistenceDelegate(java.beans.Encoder encoder) Adds a persistence delegate to a given encoder that encodes the child nodes of this node.
void	translate(double dx, double dy) Translates the node by a given amount

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.horstmann.violet.framework.Node

contains, getBounds, getConnectionPoint

Field Detail

SHADOW_GAP

public static final int SHADOW_GAP

See Also:

Constant Field Values

Constructor Detail

AbstractNode

public AbstractNode()

Constructs a node with no parents or children.

Method Detail

clone

public java.lang.Object clone()

Specified by:

clone in interface Node

Overrides:

clone in class java.lang.Object

translate

public void translate(double dx,
                      double dy)

Description copied from interface: Node

Translates the node by a given amount

Specified by:

translate in interface Node

Parameters:

dx - the amount to translate in the x-direction

dy - the amount to translate in the y-direction

addEdge

public boolean addEdge(Edge e,
                       java.awt.geom.Point2D p1,
                       java.awt.geom.Point2D p2)

Description copied from interface: Node

Adds an edge that originates at this node.

Specified by:

addEdge in interface Node

Parameters:

e - the edge to add

Returns:

true if the edge was added

removeEdge

public void removeEdge(Graph g,
                       Edge e)

Description copied from interface: Node

Notifies this node that an edge is being removed.

Specified by:

removeEdge in interface Node

Parameters:

g - the ambient graph

e - the edge to be removed

removeNode

public void removeNode(Graph g,
                       Node e)

Description copied from interface: Node

Notifies this node that a node is being removed.

Specified by:

removeNode in interface Node

Parameters:

g - the ambient graph

e - the node to be removed

layout

public void layout(Graph g,
                   java.awt.Graphics2D g2,
                   Grid grid)

Description copied from interface: Node

Lays out the node and its children.

Specified by:

layout in interface Node

Parameters:

g - the ambient graph

g2 - the graphics context

grid - the grid to snap to

addNode

public boolean addNode(Node n,
                       java.awt.geom.Point2D p)

Description copied from interface: Node

Adds a node as a child node to this node.

Specified by:

addNode in interface Node

Parameters:

n - the child node

p - the point at which the node is being added

Returns:

true if this node accepts the given node as a child

getParent

public Node getParent()

Description copied from interface: Node

Gets the parent of this node.

Specified by:

getParent in interface Node

Returns:

the parent node, or null if the node has no parent

setParent

public void setParent(Node node)

Description copied from interface: Node

Sets the parent of this node.

Specified by:

setParent in interface Node

Parameters:

node - the parent node, or null if the node has no parent

getChildren

public java.util.List getChildren()

Description copied from interface: Node

Gets the children of this node.

Specified by:

getChildren in interface Node

Returns:

an unmodifiable list of the children

addChild

public void addChild(int index,
                     Node node)

Description copied from interface: Node

Adds a child node.

Specified by:

addChild in interface Node

Parameters:

index - the position at which to add the child

node - the child node to add

addChild

public void addChild(Node node)

removeChild

public void removeChild(Node node)

Description copied from interface: Node

Removes a child node.

Specified by:

removeChild in interface Node

Parameters:

node - the child to remove.

draw

public void draw(java.awt.Graphics2D g2)

Description copied from interface: Node

Draw the node.

Specified by:

draw in interface Node

Parameters:

g2 - the graphics context

getShape

public java.awt.Shape getShape()

Returns:

the shape to be used for computing the drop shadow

setPersistenceDelegate

public static void setPersistenceDelegate(java.beans.Encoder encoder)

Adds a persistence delegate to a given encoder that encodes the child nodes of this node.

Parameters:

encoder - the encoder to which to add the delegate