y.view
Class ImageNodeRealizer

java.lang.Object
  |
  +--y.view.NodeRealizer
        |
        +--y.view.ImageNodeRealizer

All Implemented Interfaces:

NodeLayout

public class ImageNodeRealizer

extends NodeRealizer

A node realizer that displays a node as an image.

Field Summary

Fields inherited from class y.view.NodeRealizer

height, HOTSPOT_E, HOTSPOT_N, HOTSPOT_NE, HOTSPOT_NONE, HOTSPOT_NW, HOTSPOT_S, HOTSPOT_SE, HOTSPOT_SW, HOTSPOT_W, width, x, y

Constructor Summary

ImageNodeRealizer()
Creates a new ImageNodeRealizer with no image associated with it.

ImageNodeRealizer(NodeRealizer argNodeRealizer)
Creates a new ImageNodeRealizer whose attributes are copied from the given realizer.

Method Summary

static Image	addImage(URL imageURL) Adds an image Object to ImageNodeRealizer's image cache.
static void	addImages(String userHomeRes, String classPathRes) Adds images that are specified in a property file.
static void	addImages(URL url) Adds images that are specified in a property file parsable by class java.util.PropertyResourceBundle An example of such a file follows: basepath=imagenodes image1=flower.gif image2=trousers.gif image3=pike.gif The optional key "basepath" signifies a path that is prepended to all given image values. if "basepath' signifies an absolute path then the given url is not prepended to basepath.
static Vector	availableImageURLs() Returns a vector of all URL objects, that have are used as keys to ImageNodeRealizer's image cache.
NodeRealizer	createCopy(NodeRealizer nr) Creates and returns a new ImageNodeRealizer whose attributes are copied from the given realizer.
Image	getImage() Returns the image that is displayed by this realizer.
static Image	getImage(URL url) Returns the image that is stored under the given URL in ImageNodeRealizer's image cache, or null if there is no image registered with that URL.
static Hashtable	getImageTable() Returns ImageNodeRealizer's image cache. the keys to the cached Image objects are their URLs.
URL	getImageURL() Returns the URL of the displayed image, or null if no URL is associated with this realizer.
void	paintNode(Graphics2D g) This method must be implemented by subclasses.
void	read(ObjectInputStream in) Reads in the serialized form of this realizer.
void	setImage(Image image) Sets the image that will be displayed by this realizer.
void	setImageURL(URL imageURL) Sets the URL of the image that will be displayed by this realizer.
void	setToImageSize() Sets the size of this realizer to the original size of the image being displayed.
void	write(ObjectOutputStream out) Writes out this realizer in a serialized form.

Methods inherited from class y.view.NodeRealizer

addLabel, calcUnionRect, calcUnionRect, contains, createCopy, createNodeLabel, findBBIntersection, findIntersection, getBoundingBox, getCenterX, getCenterY, getFillColor, getFillColor2, getHeight, getHotSpotColor, getLabel, getLabel, getLabelText, getLayer, getLineColor, getLineType, getNode, getPortCandidates, getSloppySelectionColor, getWidth, getX, getY, hotSpotHit, intersects, isInBox, isSelected, isTransparent, isVisible, labelCount, moveBy, paint, paintHotSpots, paintLayer, paintLayerSloppy, paintSloppy, paintText, removeLabel, setCenter, setCenterX, setCenterY, setEdgesDirty, setFillColor, setFillColor2, setFrame, setFrame, setHeight, setHotSpotColor, setLabel, setLabelText, setLayer, setLayer, setLineColor, setLineType, setLocation, setSelected, setSize, setSloppySelectionColor, setTransparent, setVisible, setWidth, setX, setY

Methods inherited from class java.lang.Object

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

Constructor Detail

ImageNodeRealizer

public ImageNodeRealizer()

Creates a new ImageNodeRealizer with no image associated with it.

ImageNodeRealizer

public ImageNodeRealizer(NodeRealizer argNodeRealizer)

Creates a new ImageNodeRealizer whose attributes are copied from the given realizer.

Method Detail

createCopy

public NodeRealizer createCopy(NodeRealizer nr)

Creates and returns a new ImageNodeRealizer whose attributes are copied from the given realizer.

Specified by:

createCopy in class NodeRealizer

addImages

public static void addImages(String userHomeRes,
                             String classPathRes)

Adds images that are specified in a property file.

Parameters:

userHomeRes - A user home relative path to the property file. If this file is not found then ...

classPathRes - ... a classpath relative path to the property file will be tried instead.

See Also:

ImageNodeRealizer.addImages(URL)

addImages

public static void addImages(URL url)

Adds images that are specified in a property file parsable by class java.util.PropertyResourceBundle

An example of such a file follows:

   basepath=imagenodes
   image1=flower.gif
   image2=trousers.gif
   image3=pike.gif
 

The optional key "basepath" signifies a path that is prepended to all given image values. if "basepath' signifies an absolute path then the given url is not prepended to basepath.

Parameters:

url - the url of the properties file.

addImage

public static Image addImage(URL imageURL)

Adds an image Object to ImageNodeRealizer's image cache. The image will be loaded and accessed via the given URL.

availableImageURLs

public static Vector availableImageURLs()

Returns a vector of all URL objects, that have are used as keys to ImageNodeRealizer's image cache.

getImageTable

public static Hashtable getImageTable()

Returns ImageNodeRealizer's image cache. the keys to the cached Image objects are their URLs.

getImage

public static Image getImage(URL url)

Returns the image that is stored under the given URL in ImageNodeRealizer's image cache, or null if there is no image registered with that URL.

setImageURL

public void setImageURL(URL imageURL)

Sets the URL of the image that will be displayed by this realizer. The given URL must point to a GIF or JPG image.

The image will be automatically entered in ImageNodeRealizer's static image cache under the given URL.

setImage

public void setImage(Image image)

Sets the image that will be displayed by this realizer. By setting the image directly, the associated image URL will be reset to null.

getImage

public Image getImage()

Returns the image that is displayed by this realizer.

getImageURL

public URL getImageURL()

Returns the URL of the displayed image, or null if no URL is associated with this realizer.

setToImageSize

public void setToImageSize()

Sets the size of this realizer to the original size of the image being displayed.

paintNode

public void paintNode(Graphics2D g)

Description copied from class: NodeRealizer

This method must be implemented by subclasses. It defines in wich way the realizer paints itself on a graphics context.

Specified by:

paintNode in class NodeRealizer

write

public void write(ObjectOutputStream out)
           throws IOException

Writes out this realizer in a serialized form.

Overrides:

write in class NodeRealizer

IOException

read

public void read(ObjectInputStream in)
          throws IOException,
                 ClassNotFoundException

Reads in the serialized form of this realizer. The realizer must have been written out before by it's ImageNodeRealizer.write(ObjectOutputStream) method.

Overrides:

read in class NodeRealizer

IOException

ClassNotFoundException