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Java Source Code / Java Documentation » Ajax » zk » org.zkoss.zkex.zul.impl

Source Cross Reference

Class Diagram

Java Document (Java Doc)

java.lang .Object

org.zkoss.zkex.zul.impl .JFreeChartEngine

JFreeChartEngine

public class JFreeChartEngine implements ChartEngine,java.io.Serializable(Code)

A chart engine implemented with JFreeChart.

This is the JFreeChart base chart engine implementation. All chart would support drilldown by providing Area hot spots. Each Area would callback to org.zkoss.zul.event.ChartAreaListener class that application developers can do processing on each area.

Note that useful org.zkoss.zul.ChartModel information is put in Area's custom attribute Map so you can retrieve them by calling Area's getAttribute(key) method and use them in drilldown function. Following is the table of keys for different ChartModel.

model	key
PieModel	entity
	category
	value
CategoryModel	entity
	series
	category
	value
XYModel	entity
	series
	x
	y
HiLoModel	entity
	series
	date
	open
	high
	low
	close
	volumn

Following is the explanation for each key:

entity: entity is used to distinguish the differnt entities on a chart. It might be TITLE, CATEGORY, DATA, LEGEND. The most important entity might be DATA entity where the real chart data point is located. For example, the DATA Area is each slice in a Pie chart.
category: category name of the associated data.
value: value of the associated data.
series: series name of the associated data.
x: x value of the XYModel
y: y value of the XYModel
date, open, high, low, close, volumn: data of the HiLoModel

See also jFreeChart.
author:
henrichen
since:
3.0.0

Method Summary
public byte[]	drawChart(Object data)
protected boolean	prepareJFreeChart(JFreeChart jfchart, Chart chart) Developers with special needs can override this method to apply own rendering properties on the created JFreeChart.

Method Detail

drawChart
public byte[] drawChart(Object data)(Code)

prepareJFreeChart
protected boolean prepareJFreeChart(JFreeChart jfchart, Chart chart)(Code)
	Developers with special needs can override this method to apply own rendering properties on the created JFreeChart. The original implementation of this method simply return false to tell the engine to apply its default rendering properties. Return true tells the engine NOT to apply its default rendering properties. Parameters: jfchart - the created JFreeChart Parameters: chart - the ZK chart component associated with this ChartEngine. true to tell this engine NOT to apply its default rendering properties; false to tell this engine TO apply its default rendering properties. since: 3.0.1

Methods inherited from java.lang.Object

native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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