org.jfree.chart.renderer.xy

Class SamplingXYLineRenderer.State

java.lang.Object

org.jfree.chart.renderer.RendererState

org.jfree.chart.renderer.xy.XYItemRendererState

org.jfree.chart.renderer.xy.SamplingXYLineRenderer.State

Enclosing class:

SamplingXYLineRenderer

public static class SamplingXYLineRenderer.State
extends XYItemRendererState

Records the state for the renderer. This is used to preserve state information between calls to the drawItem() method for a single chart drawing.

Field Summary

Fields

Modifier and Type	Field and Description
(package private) double	closeY The final y-coordinate for the current x-coordinate.
(package private) double	dX The minimum change in the x-value needed to trigger an update to the seriesPath.
(package private) double	highY The highest y-coordinate for the current x-coordinate.
(package private) java.awt.geom.GeneralPath	intervalPath A second path that draws vertical intervals to cover any extreme values.
(package private) boolean	lastPointGood A flag that indicates if the last (x, y) point was 'good' (non-null).
(package private) double	lastX The last x-coordinate visited by the seriesPath.
(package private) double	lowY The lowest y-coordinate for the current x-coordinate.
(package private) double	openY The initial y-coordinate for the current x-coordinate.
(package private) java.awt.geom.GeneralPath	seriesPath The path for the current series.

Fields inherited from class org.jfree.chart.renderer.xy.XYItemRendererState

workingLine

Constructor Summary

Constructors

Constructor and Description
State(PlotRenderingInfo info) Creates a new state instance.

Method Summary

Modifier and Type	Method and Description
void	startSeriesPass(XYDataset dataset, int series, int firstItem, int lastItem, int pass, int passCount) This method is called by the XYPlot at the start of each series pass.

Methods inherited from class org.jfree.chart.renderer.xy.XYItemRendererState

endSeriesPass, getFirstItemIndex, getLastItemIndex, getProcessVisibleItemsOnly, setProcessVisibleItemsOnly

Methods inherited from class org.jfree.chart.renderer.RendererState

getEntityCollection, getInfo

Methods inherited from class java.lang.Object

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

Field Detail

seriesPath

java.awt.geom.GeneralPath seriesPath

The path for the current series.

intervalPath

java.awt.geom.GeneralPath intervalPath

A second path that draws vertical intervals to cover any extreme values.

dX

double dX

The minimum change in the x-value needed to trigger an update to the seriesPath.

lastX

double lastX

The last x-coordinate visited by the seriesPath.

openY

double openY

The initial y-coordinate for the current x-coordinate.

highY

double highY

The highest y-coordinate for the current x-coordinate.

lowY

double lowY

The lowest y-coordinate for the current x-coordinate.

closeY

double closeY

The final y-coordinate for the current x-coordinate.

lastPointGood

boolean lastPointGood

A flag that indicates if the last (x, y) point was 'good' (non-null).

Constructor Detail

State

public State(PlotRenderingInfo info)

Creates a new state instance.

Parameters:

info - the plot rendering info.

Method Detail

startSeriesPass

public void startSeriesPass(XYDataset dataset,
                            int series,
                            int firstItem,
                            int lastItem,
                            int pass,
                            int passCount)

This method is called by the XYPlot at the start of each series pass. We reset the state for the current series.

Overrides:

startSeriesPass in class XYItemRendererState

Parameters:

dataset - the dataset.

series - the series index.

firstItem - the first item index for this pass.

lastItem - the last item index for this pass.

pass - the current pass index.

passCount - the number of passes.

See Also:

XYItemRendererState.endSeriesPass(XYDataset, int, int, int, int, int)