com.jidesoft.chart
Class MultiImageLazyChartRenderer

java.lang.Object
  com.jidesoft.chart.MultiImageLazyChartRenderer

public class MultiImageLazyChartRenderer
extends Object

This class maintains a separate Image for each model added to a chart. This means that the models can easily be switched off and on by way of a ChartStyle. It also means that a chart can be built up incrementally, one model at a time.

Constructor Summary

MultiImageLazyChartRenderer(Chart chart)

Method Summary

void	addImageChangeListener(ImageChangeListener listener)
void	cancelDrawing() Cancel drawing
void	draw(Graphics g) Draw the latest image (if any) into the supplied graphics context
protected void	fireImageChange()
void	removeImage(ChartModel model) Removes the image cached for the supplied model
void	removeImage(String modelName)
void	removeImageChangeListener(ImageChangeListener listener)
void	updateCharts(boolean clearAll)
void	updateImage(ChartModel model, boolean canUseCache) Updates the image in response to a change to an individual model; for example a change to the style for that model.

Methods inherited from class java.lang.Object

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

Constructor Detail

MultiImageLazyChartRenderer

public MultiImageLazyChartRenderer(Chart chart)

Method Detail

addImageChangeListener

public void addImageChangeListener(ImageChangeListener listener)

removeImageChangeListener

public void removeImageChangeListener(ImageChangeListener listener)

fireImageChange

protected void fireImageChange()

updateCharts

public void updateCharts(boolean clearAll)

Parameters:

clearAll - if clearAll is set to true then all the previously painted model images are purged from memory

cancelDrawing

public void cancelDrawing()

Cancel drawing

updateImage

public void updateImage(ChartModel model,
                        boolean canUseCache)

Updates the image in response to a change to an individual model; for example a change to the style for that model.

Parameters:

model - the model for which a change occurred

canUseCache - specify whether it is allowed to retrieve the cached Image instead of redrawing

removeImage

public void removeImage(String modelName)

removeImage

public void removeImage(ChartModel model)

Removes the image cached for the supplied model

Parameters:

model - the model whose painted and cached image is to be removed

draw

public void draw(Graphics g)

Draw the latest image (if any) into the supplied graphics context

Parameters:

g - the Graphics context