org.vectomatic.svg.edit.client.utils

Class DecoratedImageCache

java.lang.Object

org.vectomatic.svg.edit.client.utils.DecoratedImageCache

public class DecoratedImageCache
extends Object

Class to create and cache images decorated by other images (typically, an image representing an object decorated by a image representing this object's status, à la eclipse)

Author:

laaglu

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	DecoratedImageCache.HAlign Horizontal alignment of the decoration image
protected class	DecoratedImageCache.StoreKey Composite key class for entries in the cache
static class	DecoratedImageCache.VAlign Vertical alignment of the decoration image

Field Summary

Fields

Modifier and Type	Field and Description
protected com.google.gwt.canvas.client.Canvas	canvas A canvas to create the decorated images
protected com.google.gwt.canvas.dom.client.Context2d	ctx The canvas context
protected Map<com.google.gwt.resources.client.ImageResource,Map<DecoratedImageCache.StoreKey,com.google.gwt.user.client.ui.AbstractImagePrototype>>	imageToDecorations Cache storage
protected Map<com.google.gwt.resources.client.ImageResource,SimpleImage>	resourceToImage Maps image resources to simple images

Constructor Summary

Constructors

Constructor and Description
DecoratedImageCache(Map<com.google.gwt.resources.client.ImageResource,SimpleImage> resourceToImage) Constructor

Method Summary

Modifier and Type	Method and Description
com.google.gwt.user.client.ui.AbstractImagePrototype	decorate(SimpleImage base, SimpleImage decoration, DecoratedImageCache.HAlign halign, DecoratedImageCache.VAlign valign) Decorates the specified image
com.google.gwt.user.client.ui.AbstractImagePrototype	getImageWithDecoration(com.google.gwt.resources.client.ImageResource base, com.google.gwt.resources.client.ImageResource decoration, DecoratedImageCache.HAlign halign, DecoratedImageCache.VAlign valign) Creates or returns a decorated image

Methods inherited from class java.lang.Object

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

Field Detail

canvas

protected com.google.gwt.canvas.client.Canvas canvas

A canvas to create the decorated images

ctx

protected com.google.gwt.canvas.dom.client.Context2d ctx

The canvas context

resourceToImage

protected Map<com.google.gwt.resources.client.ImageResource,SimpleImage> resourceToImage

Maps image resources to simple images

imageToDecorations

protected Map<com.google.gwt.resources.client.ImageResource,Map<DecoratedImageCache.StoreKey,com.google.gwt.user.client.ui.AbstractImagePrototype>> imageToDecorations

Cache storage

Constructor Detail

DecoratedImageCache

public DecoratedImageCache(Map<com.google.gwt.resources.client.ImageResource,SimpleImage> resourceToImage)

Constructor

Parameters:

resourceToImage - A map containing the base images and the decoration images

Method Detail

getImageWithDecoration

public com.google.gwt.user.client.ui.AbstractImagePrototype getImageWithDecoration(com.google.gwt.resources.client.ImageResource base,
                                                                                   com.google.gwt.resources.client.ImageResource decoration,
                                                                                   DecoratedImageCache.HAlign halign,
                                                                                   DecoratedImageCache.VAlign valign)

Creates or returns a decorated image

Parameters:

base - The base image

decoration - The image decoration

halign - Horizontal alignment of the decoration

valign - Vertical alignment of the decoration

Returns:

The decorated image

decorate

public com.google.gwt.user.client.ui.AbstractImagePrototype decorate(SimpleImage base,
                                                                     SimpleImage decoration,
                                                                     DecoratedImageCache.HAlign halign,
                                                                     DecoratedImageCache.VAlign valign)

Decorates the specified image

Parameters:

base - The base image

decoration - The image decoration

halign - Horizontal alignment of the decoration

valign - Vertical alignment of the decoration

Returns:

The decorated image