org.jfree.chart.plot
Class AbstractPieLabelDistributor

java.lang.Object
  org.jfree.chart.plot.AbstractPieLabelDistributor

All Implemented Interfaces:

java.io.Serializable

Direct Known Subclasses:

PieLabelDistributor

public abstract class AbstractPieLabelDistributor
extends java.lang.Object
implements java.io.Serializable

A base class for handling the distribution of pie section labels. Create your own subclass and set it using the PiePlot.setLabelDistributor(AbstractPieLabelDistributor) method if you want to customise the label distribution.

See Also:

Serialized Form

Field Summary

protected java.util.List

labels The label records.

Constructor Summary

AbstractPieLabelDistributor()
Creates a new instance.

Method Summary

void	addPieLabelRecord(PieLabelRecord record) Adds a label record.
void	clear() Clears the list of labels.
abstract void	distributeLabels(double minY, double height) Called by the PiePlot class.
int	getItemCount() Returns the number of items in the list.
PieLabelRecord	getPieLabelRecord(int index) Returns a label record from the list.

Methods inherited from class java.lang.Object

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

Field Detail

labels

protected java.util.List labels

The label records.

Constructor Detail

AbstractPieLabelDistributor

public AbstractPieLabelDistributor()

Creates a new instance.

Method Detail

getPieLabelRecord

public PieLabelRecord getPieLabelRecord(int index)

Returns a label record from the list.

Parameters:

index - the index.

Returns:

The label record.

addPieLabelRecord

public void addPieLabelRecord(PieLabelRecord record)

Adds a label record.

Parameters:

record - the label record (null not permitted).

getItemCount

public int getItemCount()

Returns the number of items in the list.

Returns:

The item count.

clear

public void clear()

Clears the list of labels.

distributeLabels

public abstract void distributeLabels(double minY,
                                      double height)

Called by the PiePlot class. Implementations should distribute the labels in this.labels then return.

Parameters:

minY - the y-coordinate for the top of the label area.

height - the height of the label area.