org.jfree.chart.plot

Class AbstractPieLabelDistributor

Implemented Interfaces:
Serializable
Known Direct Subclasses:
PieLabelDistributor

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

Field Summary

protected 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.

Field Details

labels

protected List labels
The label records.

Constructor Details

AbstractPieLabelDistributor

public AbstractPieLabelDistributor()
Creates a new instance.

Method Details

addPieLabelRecord

public void addPieLabelRecord(PieLabelRecord record)
Adds a label record.
Parameters:
record - the label record (null not permitted).

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.

getItemCount

public int getItemCount()
Returns the number of items in the list.
Returns:
The item count.

getPieLabelRecord

public PieLabelRecord getPieLabelRecord(int index)
Returns a label record from the list.
Parameters:
index - the index.
Returns:
The label record.