diva.canvas.toolbox
Class TypedDecorator

java.lang.Object
  diva.canvas.AbstractFigure
      diva.canvas.AbstractFigureContainer
          diva.canvas.FigureDecorator
              diva.canvas.toolbox.TypedDecorator

All Implemented Interfaces:

CanvasComponent, Figure, FigureContainer, FigureSet, VisibleComponent, UserObjectContainer

public class TypedDecorator
extends FigureDecorator

A FigureDecorator implementation which simply acts as a set of prototypes which can be instantiated according to the type of object the decorator is applied to. Instances of this class will throw an exception if they are actually placed into a figure hierarchy. They can, however, be passed to methods that expect a decorator instance that is to be used as a prototype for other instances.

Version:

$Id: TypedDecorator.java 43786 2006-09-21 15:40:15Z cxh $

Author:

John Reekie, Michael Shilman

Accepted Rating:

Red

Field Summary

private FigureDecorator	_defaultDecorator The default prototype decorator.
private java.util.Hashtable	_typedDecorators The prototypes indexed by type.

Constructor Summary

TypedDecorator()
A typed decorator that uses a BasicHighlighter as its default.

TypedDecorator(FigureDecorator defaultDecorator)
A typed decorator with the given decorator as its default.

Method Summary

void	addDecorator(java.lang.Class c, FigureDecorator d) Add a decorator which is duplicated when an object of the given class is passed to the newInstance() method.
FigureDecorator	newInstance(Figure f) Return a new decorator, according to the type of the figure.
void	removeDecorator(java.lang.Class c) Remove a decorator.
void	setParent(CanvasComponent fc) Throw an exception.

Methods inherited from class diva.canvas.FigureDecorator

add, contains, figures, figuresFromBack, figuresFromFront, getBounds, getChild, getContainer, getDecoratedFigure, getFigureCount, getShape, hit, paint, remove, replaceChild, setChild, transform, translate

Methods inherited from class diva.canvas.AbstractFigureContainer

decorate, pick, pick, repaint, undecorate

Methods inherited from class diva.canvas.AbstractFigure

contains, getInteractor, getLayer, getOrigin, getParent, getToolTipText, getTransformContext, getUserObject, intersects, isVisible, paint, repaint, setInteractor, setToolTipText, setUserObject, setVisible

Methods inherited from class java.lang.Object

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

Methods inherited from interface diva.canvas.VisibleComponent

isVisible, paint, setVisible

Methods inherited from interface diva.canvas.CanvasComponent

getParent, getTransformContext, repaint

Field Detail

_defaultDecorator

private FigureDecorator _defaultDecorator

The default prototype decorator.

_typedDecorators

private java.util.Hashtable _typedDecorators

The prototypes indexed by type.

Constructor Detail

TypedDecorator

public TypedDecorator()

A typed decorator that uses a BasicHighlighter as its default.

TypedDecorator

public TypedDecorator(FigureDecorator defaultDecorator)

A typed decorator with the given decorator as its default.

Method Detail

addDecorator

public void addDecorator(java.lang.Class c,
                         FigureDecorator d)

Add a decorator which is duplicated when an object of the given class is passed to the newInstance() method.

newInstance

public FigureDecorator newInstance(Figure f)

Return a new decorator, according to the type of the figure.

Specified by:

newInstance in class FigureDecorator

removeDecorator

public void removeDecorator(java.lang.Class c)

Remove a decorator.

setParent

public void setParent(CanvasComponent fc)

Throw an exception. The exception is thrown to ensure that instances of this class are not inserted into the figure hierarchy. This is a bit clumsy, as this object is really a factory masquerading as a figure.

Specified by:

setParent in interface Figure

Overrides:

setParent in class AbstractFigure