diva.canvas.interactor
Class BasicSelectionRenderer

java.lang.Object
  diva.canvas.interactor.BasicSelectionRenderer

All Implemented Interfaces:

SelectionRenderer

public class BasicSelectionRenderer
extends java.lang.Object
implements SelectionRenderer

A basic implementation of a selection renderer. This implementation wraps each selected figure in an instance of a FigureDecorator. The figure decorator is obtained by cloning a prototype decorator, accessible through the get/setFigureDecorator() methods. The default prototype is an instance of BasicHighlighter. Often, the prototype decorator will be set to instances of one of the Manipulator classes.

Version:

$Id: BasicSelectionRenderer.java 38798 2005-07-08 20:00:01Z cxh $

Author:

John Reekie

Field Summary

private java.util.Hashtable	_decorators Mapping from figures to decorators
private FigureDecorator	_prototypeDecorator The prototype decorator

Constructor Summary

BasicSelectionRenderer()
Create a new selection renderer with the default prototype decorator.

BasicSelectionRenderer(FigureDecorator d)
Create a new renderer with the given prototype decorator.

Method Summary

FigureDecorator	getDecorator() Get the prototype decorator.
boolean	isRenderedSelected(Figure figure) Test if the given figure is currently rendered selected.
void	renderDeselected(Figure figure) Set the rendering of the figure as deselected.
void	renderSelected(Figure figure) Set the rendering of the figure as selected.
void	setDecorator(FigureDecorator d) Set the prototype decorator.

Methods inherited from class java.lang.Object

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

Field Detail

_decorators

private java.util.Hashtable _decorators

Mapping from figures to decorators

_prototypeDecorator

private FigureDecorator _prototypeDecorator

The prototype decorator

Constructor Detail

BasicSelectionRenderer

public BasicSelectionRenderer()

Create a new selection renderer with the default prototype decorator.

BasicSelectionRenderer

public BasicSelectionRenderer(FigureDecorator d)

Create a new renderer with the given prototype decorator.

Method Detail

getDecorator

public FigureDecorator getDecorator()

Get the prototype decorator.

isRenderedSelected

public boolean isRenderedSelected(Figure figure)

Test if the given figure is currently rendered selected.

Specified by:

isRenderedSelected in interface SelectionRenderer

renderDeselected

public void renderDeselected(Figure figure)

Set the rendering of the figure as deselected. The figure has the decorator unwrapped off it and is inserted back into its parent figure container, if there is one. If the figure is not rendered selected, do nothing.

Specified by:

renderDeselected in interface SelectionRenderer

renderSelected

public void renderSelected(Figure figure)

Set the rendering of the figure as selected. If the figure is already rendered selected, just repaint. Otherwise create a new BasicHighlighter, and wrap the figure in the decorator, inserting the decorator into the figure's parent.

Specified by:

renderSelected in interface SelectionRenderer

setDecorator

public void setDecorator(FigureDecorator d)

Set the prototype decorator.