edu.uci.ics.jung.visualization
Class BasicTransformer

java.lang.Object
  edu.uci.ics.jung.visualization.BasicTransformer

All Implemented Interfaces:

MultiLayerTransformer, BidirectionalTransformer, ShapeTransformer, ChangeEventSupport, EventListener, ChangeListener

public class BasicTransformer
extends Object
implements MultiLayerTransformer, ShapeTransformer, ChangeListener, ChangeEventSupport

A basic implementation of the MultiLayerTransformer interface that provides two Layers: VIEW and LAYOUT. It also provides ChangeEventSupport

Author:

Tom Nelson - tomnelson@dev.java.net

Field Summary

protected ChangeEventSupport	changeSupport
protected MutableTransformer	layoutTransformer
protected MutableTransformer	viewTransformer

Constructor Summary

BasicTransformer()
Creates an instance and notifies the view and layout transformers to listen to changes published by this instance.

Method Summary

void	addChangeListener(ChangeListener l)
void	fireStateChanged()
ChangeListener[]	getChangeListeners() Returns an array of all the ChangeListeners added with addChangeListener().
protected MutableTransformer	getLayoutTransformer()
MutableTransformer	getTransformer(Layer layer)
protected MutableTransformer	getViewTransformer()
protected Point2D	inverseLayoutTransform(Point2D p)
protected Shape	inverseLayoutTransform(Shape shape)
Point2D	inverseTransform(Layer layer, Point2D p)
Shape	inverseTransform(Layer layer, Shape shape)
Point2D	inverseTransform(Point2D p) convert the supplied screen coordinate to the graph coordinate.
Shape	inverseTransform(Shape shape)
protected Point2D	inverseViewTransform(Point2D p)
protected Shape	inverseViewTransform(Shape shape)
protected Point2D	layoutTransform(Point2D p)
protected Shape	layoutTransform(Shape shape)
void	removeChangeListener(ChangeListener l) Removes a ChangeListener.
protected void	setLayoutTransformer(MutableTransformer transformer)
void	setToIdentity()
void	setTransformer(Layer layer, MutableTransformer transformer)
protected void	setViewTransformer(MutableTransformer transformer)
void	stateChanged(ChangeEvent e)
Point2D	transform(Layer layer, Point2D p)
Shape	transform(Layer layer, Shape shape)
Point2D	transform(Point2D p) convert the supplied graph coordinate to the screen coordinate
Shape	transform(Shape shape) map a shape from graph coordinate system to the screen coordinate system
protected Point2D	viewTransform(Point2D p)
protected Shape	viewTransform(Shape shape)

Methods inherited from class java.lang.Object

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

Field Detail

changeSupport

protected ChangeEventSupport changeSupport

viewTransformer

protected MutableTransformer viewTransformer

layoutTransformer

protected MutableTransformer layoutTransformer

Constructor Detail

BasicTransformer

public BasicTransformer()

Creates an instance and notifies the view and layout transformers to listen to changes published by this instance.

Method Detail

setViewTransformer

protected void setViewTransformer(MutableTransformer transformer)

See Also:

edu.uci.ics.jung.visualization.MultiLayerTransformer#setViewTransformer(edu.uci.ics.jung.visualization.transform.MutableTransformer)

setLayoutTransformer

protected void setLayoutTransformer(MutableTransformer transformer)

getLayoutTransformer

protected MutableTransformer getLayoutTransformer()

getViewTransformer

protected MutableTransformer getViewTransformer()

inverseTransform

public Point2D inverseTransform(Point2D p)

Description copied from interface: BidirectionalTransformer

convert the supplied screen coordinate to the graph coordinate.

Specified by:

inverseTransform in interface BidirectionalTransformer

Parameters:

p - screen point to convert

Returns:

the graph point

inverseViewTransform

protected Point2D inverseViewTransform(Point2D p)

inverseLayoutTransform

protected Point2D inverseLayoutTransform(Point2D p)

transform

public Point2D transform(Point2D p)

Description copied from interface: BidirectionalTransformer

convert the supplied graph coordinate to the screen coordinate

Specified by:

transform in interface BidirectionalTransformer

Parameters:

p - graph point to convert

Returns:

screen point

viewTransform

protected Point2D viewTransform(Point2D p)

layoutTransform

protected Point2D layoutTransform(Point2D p)

inverseTransform

public Shape inverseTransform(Shape shape)

Specified by:

inverseTransform in interface BidirectionalTransformer

Specified by:

inverseTransform in interface ShapeTransformer

Returns:

inverseViewTransform

protected Shape inverseViewTransform(Shape shape)

inverseLayoutTransform

protected Shape inverseLayoutTransform(Shape shape)

transform

public Shape transform(Shape shape)

Description copied from interface: ShapeTransformer

map a shape from graph coordinate system to the screen coordinate system

Specified by:

transform in interface BidirectionalTransformer

Specified by:

transform in interface ShapeTransformer

Returns:

a GeneralPath (Shape) representing the screen points of the shape

viewTransform

protected Shape viewTransform(Shape shape)

layoutTransform

protected Shape layoutTransform(Shape shape)

setToIdentity

public void setToIdentity()

Specified by:

setToIdentity in interface MultiLayerTransformer

addChangeListener

public void addChangeListener(ChangeListener l)

Specified by:

addChangeListener in interface ChangeEventSupport

removeChangeListener

public void removeChangeListener(ChangeListener l)

Description copied from interface: ChangeEventSupport

Removes a ChangeListener.

Specified by:

removeChangeListener in interface ChangeEventSupport

Parameters:

l - the listener to be removed

getChangeListeners

public ChangeListener[] getChangeListeners()

Description copied from interface: ChangeEventSupport

Returns an array of all the ChangeListeners added with addChangeListener().

Specified by:

getChangeListeners in interface ChangeEventSupport

Returns:

all of the ChangeListeners added or an empty array if no listeners have been added

fireStateChanged

public void fireStateChanged()

Specified by:

fireStateChanged in interface ChangeEventSupport

stateChanged

public void stateChanged(ChangeEvent e)

Specified by:

stateChanged in interface ChangeListener

getTransformer

public MutableTransformer getTransformer(Layer layer)

Specified by:

getTransformer in interface MultiLayerTransformer

Returns:

the layoutTransformer

inverseTransform

public Point2D inverseTransform(Layer layer,
                                Point2D p)

Specified by:

inverseTransform in interface MultiLayerTransformer

setTransformer

public void setTransformer(Layer layer,
                           MutableTransformer transformer)

Specified by:

setTransformer in interface MultiLayerTransformer

See Also:

edu.uci.ics.jung.visualization.VisualizationServer#setViewTransformer(edu.uci.ics.jung.visualization.transform.MutableTransformer)

transform

public Point2D transform(Layer layer,
                         Point2D p)

Specified by:

transform in interface MultiLayerTransformer

transform

public Shape transform(Layer layer,
                       Shape shape)

Specified by:

transform in interface MultiLayerTransformer

inverseTransform

public Shape inverseTransform(Layer layer,
                              Shape shape)

Specified by:

inverseTransform in interface MultiLayerTransformer