eu.webtoolkit.jwt.chart
Class SeriesIterator

java.lang.Object
  eu.webtoolkit.jwt.chart.SeriesIterator

public class SeriesIterator
extends java.lang.Object

Abstract base class for iterating over series data in WChart2DRenderer.

This class is specialized for rendering series data.

See Also:

WChart2DRenderer.iterateSeries(SeriesIterator iterator, boolean reverseStacked)

Constructor Summary

SeriesIterator()

Method Summary

void	endSegment() End handling a particular segment.
void	endSeries() End iterating a particular series.
int	getCurrentXSegment() Returns the current X segment.
int	getCurrentYSegment() Returns the current Y segment.
void	newValue(WDataSeries series, double x, double y, double stackY, WModelIndex xIndex, WModelIndex yIndex) Process a value.
static void	setBrushColor(WBrush brush, WModelIndex xIndex, WModelIndex yIndex, int colorRole)
static void	setPenColor(WPen pen, WModelIndex xIndex, WModelIndex yIndex, int colorRole)
void	startSegment(int currentXSegment, int currentYSegment, WRectF currentSegmentArea) Start handling a new segment.
boolean	startSeries(WDataSeries series, double groupWidth, int numBarGroups, int currentBarGroup) Start iterating a particular series.

Methods inherited from class java.lang.Object

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

Constructor Detail

SeriesIterator

public SeriesIterator()

Method Detail

startSegment

public void startSegment(int currentXSegment,
                         int currentYSegment,
                         WRectF currentSegmentArea)

Start handling a new segment.

Because of a 'break' specified in an axis, axes may be divided in one or two segments (in fact only the API limits this now to two). The iterator will iterate all segments seperately, but each time with a different clipping region specified in the painter, corresponding to that segment.

The currentSegmentArea specifies the clipping area.

endSegment

public void endSegment()

End handling a particular segment.

See Also:

startSegment(int currentXSegment, int currentYSegment, WRectF currentSegmentArea)

startSeries

public boolean startSeries(WDataSeries series,
                           double groupWidth,
                           int numBarGroups,
                           int currentBarGroup)

Start iterating a particular series.

Returns whether the series values should be iterated. The groupWidth is the width (in pixels) of a single bar group. The chart contains numBarGroups, and the current series is in the currentBarGroup'th group.

endSeries

public void endSeries()

End iterating a particular series.

newValue

public void newValue(WDataSeries series,
                     double x,
                     double y,
                     double stackY,
                     WModelIndex xIndex,
                     WModelIndex yIndex)

Process a value.

Processes a value with model coordinates (x, y). The y value may differ from the model's y value, because of stacked series. The y value here corresponds to the location on the chart, after stacking.

The stackY argument is the y value from the previous series (also after stacking). It will be 0, unless this series is stacked.

getCurrentXSegment

public int getCurrentXSegment()

Returns the current X segment.

getCurrentYSegment

public int getCurrentYSegment()

Returns the current Y segment.

setPenColor

public static void setPenColor(WPen pen,
                               WModelIndex xIndex,
                               WModelIndex yIndex,
                               int colorRole)

setBrushColor

public static void setBrushColor(WBrush brush,
                                 WModelIndex xIndex,
                                 WModelIndex yIndex,
                                 int colorRole)