y.io
Class ImageMapOutputHandler

java.lang.Object
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  +--y.io.IOHandler
        |
        +--y.io.ImageMapOutputHandler

public class ImageMapOutputHandler

extends IOHandler

A simple write-only IOHandler that produces a HTML image map. The handler allows association of rectangular nodes and labels to hyperlinks. The hyperlink data has to be provided by a LinkMap object.

Constructor Summary

ImageMapOutputHandler()
Constructs an ImageMapOutputHandler, which uses newlines and indents area elements by 2 spaces.

Method Summary

boolean	canRead() Returns false, since this class can't read a graph.
Graph2DView	createDefaultGraph2DView(Graph2D graph) Creates the default view used as image producer in case there is no current view associated with the graph2D.
String	createHTMLString(Graph2D graph) Creates a string representation of a HTML ImageMap corresponding to the specified graph.
String	getFileFormatString() Returns "HTML ImageMap"
String	getFileNameExtension() Returns "html"
int	getIndentDepth() Selector
LinkMap	getReferences() Selector
boolean	isUseNewlines() Selector
boolean	isWellFormed() Returns wether this class generates wellformed (xml-like) tags.
void	read(Graph2D graph, InputStream in) Unsupported method.
void	setIndentDepth(int indentDepth) Sets the indent depth.
void	setReferences(LinkMap references) Selector
void	setUseNewlines(boolean useNewlines) Sets the useNewlines flag.
void	setWellFormed(boolean wellFormed) Sets the policy for the generated html/xhtml.
void	write(Graph2D graph, OutputStream out) Writes a HTML ImageMap corresponding to the specified graph to the specified stream.

Methods inherited from class y.io.IOHandler

canWrite, canWriteSubset, createObjectInputStream, createObjectOutputStream, hide, read, read, shouldSerialize, shouldSerialize, write, writeSubset, writeSubset

Methods inherited from class java.lang.Object

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

Constructor Detail

ImageMapOutputHandler

public ImageMapOutputHandler()

Constructs an ImageMapOutputHandler, which uses newlines and indents area elements by 2 spaces.

Method Detail

read

public void read(Graph2D graph,
                 InputStream in)

Unsupported method.

Specified by:

read in class IOHandler

write

public void write(Graph2D graph,
                  OutputStream out)
           throws IOException

Writes a HTML ImageMap corresponding to the specified graph to the specified stream.

Specified by:

write in class IOHandler

Throws:

IOException

Parameters:

graph -

out -

createHTMLString

public String createHTMLString(Graph2D graph)

Creates a string representation of a HTML ImageMap corresponding to the specified graph.

Parameters:

graph -

Returns:

the String representation of the HTML ImageMap

isUseNewlines

public boolean isUseNewlines()

Selector

Returns:

wheter the <area> elements are separated by newlines

setUseNewlines

public void setUseNewlines(boolean useNewlines)

Sets the useNewlines flag. The default is true.

Parameters:

useNewlines -

getIndentDepth

public int getIndentDepth()

Selector

Returns:

the indent depth, i.e. the amount of blanks separating two <area> elements

setIndentDepth

public void setIndentDepth(int indentDepth)

Sets the indent depth. The default value is 2.

Parameters:

indentDepth -

createDefaultGraph2DView

public Graph2DView createDefaultGraph2DView(Graph2D graph)

Creates the default view used as image producer in case there is no current view associated with the graph2D. The default view renders the graph in its original size.

The returned view will be automatically registered as one of the graph's views. After the returned view is not needed anymore it is advisable to remove it from the list of registered view of the given graph.

See Also:

Graph2D.removeView(View)

getReferences

public LinkMap getReferences()

Selector

Returns:

the current LinkMap instance

setReferences

public void setReferences(LinkMap references)

Selector

Parameters:

references - the new LinkMap instance

canRead

public boolean canRead()

Returns false, since this class can't read a graph.

Overrides:

canRead in class IOHandler

getFileFormatString

public String getFileFormatString()

Returns "HTML ImageMap"

Specified by:

getFileFormatString in class IOHandler

getFileNameExtension

public String getFileNameExtension()

Returns "html"

Specified by:

getFileNameExtension in class IOHandler

isWellFormed

public boolean isWellFormed()

Returns wether this class generates wellformed (xml-like) tags.

setWellFormed

public void setWellFormed(boolean wellFormed)

Sets the policy for the generated html/xhtml. If set to true, elements will be well-formed. The default is false