Package eu.webtoolkit.jwt.chart

Class SeriesIterator

java.lang.Object
eu.webtoolkit.jwt.chart.SeriesIterator
public class SeriesIterator extends Object
Abstract base class for iterating over series data in a chart.

This class is specialized for rendering series data.

  • Constructor Details

    • SeriesIterator

      public SeriesIterator()

  • Method Details

    • 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 separately, 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:

    • 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, int xRow, int xColumn, int yRow, int yColumn)
      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, WDataSeries series, int xRow, int xColumn, int yRow, int yColumn, ItemDataRole colorRole)

    • setBrushColor

      public static void setBrushColor(WBrush brush, WDataSeries series, int xRow, int xColumn, int yRow, int yColumn, ItemDataRole colorRole)