Class ClusteredXYBarRenderer

All Implemented Interfaces:
Serializable, Cloneable, EventListener, AnnotationChangeListener, LegendItemSource, XYItemRenderer, PublicCloneable

public class ClusteredXYBarRenderer
extends XYBarRenderer
implements Cloneable, PublicCloneable, Serializable
An extension of XYBarRenderer that displays bars for different series values at the same x next to each other. The assumption here is that for each x (time or else) there is a y value for each series. If this is not the case, there will be spaces between bars for a given x. The example shown here is generated by the program included in the JFreeChart demo collection:


This renderer does not include code to calculate the crosshair point for the plot.

See Also:
Serialized Form
  • Constructor Details

    • ClusteredXYBarRenderer

      Default constructor. Bar margin is set to 0.0.
    • ClusteredXYBarRenderer

      public ClusteredXYBarRenderer​(double margin, boolean centerBarAtStartValue)
      Constructs a new XY clustered bar renderer.
      margin - the percentage amount to trim from the width of each bar.
      centerBarAtStartValue - if true, bars will be centered on the start of the time period.
  • Method Details

    • getPassCount

      public int getPassCount()
      Returns the number of passes through the dataset that this renderer requires. In this case, two passes are required, the first for drawing the shadows (if visible), and the second for drawing the bars.
      Specified by:
      getPassCount in interface XYItemRenderer
      getPassCount in class AbstractXYItemRenderer
    • findDomainBounds

      public Range findDomainBounds​(XYDataset dataset)
      Returns the x-value bounds for the specified dataset.
      Specified by:
      findDomainBounds in interface XYItemRenderer
      findDomainBounds in class XYBarRenderer
      dataset - the dataset (null permitted).
      The bounds (possibly null).
      See Also:
    • findDomainBoundsWithOffset

      Iterates over the items in an IntervalXYDataset to find the range of x-values including the interval OFFSET so that it centers the interval around the start value.
      dataset - the dataset (null not permitted).
      The range (possibly null).
    • drawItem

      public void drawItem​(Graphics2D g2, XYItemRendererState state, Rectangle2D dataArea, PlotRenderingInfo info, XYPlot plot, ValueAxis domainAxis, ValueAxis rangeAxis, XYDataset dataset, int series, int item, CrosshairState crosshairState, int pass)
      Draws the visual representation of a single data item. This method is mostly copied from the superclass, the change is that in the calculated space for a singe bar we draw bars for each series next to each other. The width of each bar is the available width divided by the number of series. Bars for each series are drawn in order left to right.
      Specified by:
      drawItem in interface XYItemRenderer
      drawItem in class XYBarRenderer
      g2 - the graphics device.
      state - the renderer state.
      dataArea - the area within which the plot is being drawn.
      info - collects information about the drawing.
      plot - the plot (can be used to obtain standard color information etc).
      domainAxis - the domain axis.
      rangeAxis - the range axis.
      dataset - the dataset.
      series - the series index.
      item - the item index.
      crosshairState - crosshair information for the plot (null permitted).
      pass - the pass index.
    • equals

      public boolean equals​(Object obj)
      Tests this renderer for equality with an arbitrary object, returning true if obj is a ClusteredXYBarRenderer with the same settings as this renderer, and false otherwise.
      equals in class XYBarRenderer
      obj - the object (null permitted).
      A boolean.
    • clone

      Returns a clone of the renderer.
      Specified by:
      clone in interface PublicCloneable
      clone in class XYBarRenderer
      A clone.
      CloneNotSupportedException - if the renderer cannot be cloned.