com.mxgraph.reader
Class mxGraphViewReader

java.lang.Object
  org.xml.sax.helpers.DefaultHandler
      com.mxgraph.reader.mxGraphViewReader

All Implemented Interfaces:

ContentHandler, DTDHandler, EntityResolver, ErrorHandler

Direct Known Subclasses:

mxGraphViewImageReader

public abstract class mxGraphViewReader
extends DefaultHandler

An abstract converter that renders display XML data onto a canvas.

Field Summary

protected mxICanvas	canvas Holds the canvas to be used for rendering the graph.
protected boolean	htmlLabels Specifies if labels should be rendered as HTML markup.
protected double	scale Holds the global scale of the graph.

Constructor Summary

mxGraphViewReader()

Method Summary

abstract mxICanvas	createCanvas(Map<String,Object> attrs) Returns the canvas to be used for rendering.
void	drawEdge(Map<String,Object> attrs) Draws the specified edge using the canvas.
void	drawLabel(boolean isEdge, Map<String,Object> attrs) Draws the specified label using the canvas.
void	drawVertex(Map<String,Object> attrs) Draws the specified vertex using the canvas.
mxICanvas	getCanvas() Returns the canvas that is used for rendering the graph.
boolean	isHtmlLabels() Returns the htmlLabels switch.
void	parseElement(String tagName, Map<String,Object> attrs) Parses the given element and paints it onto the canvas.
static List<mxPoint>	parsePoints(String pts) Parses the list of points into an object-oriented representation.
void	setHtmlLabels(boolean value) Sets the htmlLabels switch.
void	startElement(String uri, String localName, String qName, Attributes atts)

Methods inherited from class org.xml.sax.helpers.DefaultHandler

characters, endDocument, endElement, endPrefixMapping, error, fatalError, ignorableWhitespace, notationDecl, processingInstruction, resolveEntity, setDocumentLocator, skippedEntity, startDocument, startPrefixMapping, unparsedEntityDecl, warning

Methods inherited from class java.lang.Object

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

Field Detail

canvas

protected mxICanvas canvas

Holds the canvas to be used for rendering the graph.

scale

protected double scale

Holds the global scale of the graph. This is set just before createCanvas is called.

htmlLabels

protected boolean htmlLabels

Specifies if labels should be rendered as HTML markup.

Constructor Detail

mxGraphViewReader

public mxGraphViewReader()

Method Detail

setHtmlLabels

public void setHtmlLabels(boolean value)

Sets the htmlLabels switch.

isHtmlLabels

public boolean isHtmlLabels()

Returns the htmlLabels switch.

createCanvas

public abstract mxICanvas createCanvas(Map<String,Object> attrs)

Returns the canvas to be used for rendering.

Parameters:

attrs - Specifies the attributes of the new canvas.

Returns:

Returns a new canvas.

getCanvas

public mxICanvas getCanvas()

Returns the canvas that is used for rendering the graph.

Returns:

Returns the canvas.

startElement

public void startElement(String uri,
                         String localName,
                         String qName,
                         Attributes atts)
                  throws SAXException

Specified by:

startElement in interface ContentHandler

Overrides:

startElement in class DefaultHandler

Throws:

SAXException

parseElement

public void parseElement(String tagName,
                         Map<String,Object> attrs)

Parses the given element and paints it onto the canvas.

Parameters:

tagName - Name of the node to be parsed.

attrs - Attributes of the node to be parsed.

drawVertex

public void drawVertex(Map<String,Object> attrs)

Draws the specified vertex using the canvas.

Parameters:

attrs - Specifies the attributes of the vertex.

drawEdge

public void drawEdge(Map<String,Object> attrs)

Draws the specified edge using the canvas.

Parameters:

attrs - Specifies the attribute of the edge.

drawLabel

public void drawLabel(boolean isEdge,
                      Map<String,Object> attrs)

Draws the specified label using the canvas.

Parameters:

attrs - Specifies the attributes of the label.

parsePoints

public static List<mxPoint> parsePoints(String pts)

Parses the list of points into an object-oriented representation.

Parameters:

pts - String containing a list of points.

Returns:

Returns the points as a list of mxPoints.