Package org.jfree.chart.renderer.category

Class LevelRenderer

java.lang.Object
org.jfree.chart.renderer.AbstractRenderer
org.jfree.chart.renderer.category.AbstractCategoryItemRenderer
org.jfree.chart.renderer.category.LevelRenderer
All Implemented Interfaces:
Serializable, Cloneable, LegendItemSource, CategoryItemRenderer, PublicCloneable
public class LevelRenderer extends AbstractCategoryItemRenderer implements Cloneable, PublicCloneable, Serializable
A CategoryItemRenderer that draws individual data items as horizontal lines, spaced in the same way as bars in a bar chart. The example shown here is generated by the OverlaidBarChartDemo2.java program included in the JFreeChart Demo Collection:

LevelRendererSample.png
See Also:

  • Field Details

  • Constructor Details

    • LevelRenderer

      public LevelRenderer()
      Creates a new renderer with default settings.

  • Method Details

    • getItemMargin

      public double getItemMargin()
      Returns the item margin.
      Returns:
      The margin.
      See Also:

    • setItemMargin

      public void setItemMargin(double percent)
      Sets the item margin and sends a RendererChangeEvent to all registered listeners. The value is expressed as a percentage of the available width for plotting all the bars, with the resulting amount to be distributed between all the bars evenly.
      Parameters:
      percent - the new margin.
      See Also:

    • getMaximumItemWidth

      public double getMaximumItemWidth()
      Returns the maximum width, as a percentage of the available drawing space.
      Returns:
      The maximum width.
      See Also:

    • setMaximumItemWidth

      public void setMaximumItemWidth(double percent)
      Sets the maximum item width, which is specified as a percentage of the available space for all items, and sends a RendererChangeEvent to all registered listeners.
      Parameters:
      percent - the percent.
      See Also:

    • initialise

      public CategoryItemRendererState initialise(Graphics2D g2, Rectangle2D dataArea, CategoryPlot plot, int rendererIndex, PlotRenderingInfo info)
      Initialises the renderer and returns a state object that will be passed to subsequent calls to the drawItem method.

      This method gets called once at the start of the process of drawing a chart.

      Specified by:
      initialise in interface CategoryItemRenderer
      Overrides:
      initialise in class AbstractCategoryItemRenderer
      Parameters:
      g2 - the graphics device.
      dataArea - the area in which the data is to be plotted.
      plot - the plot.
      rendererIndex - the renderer index.
      info - collects chart rendering information for return to caller.
      Returns:
      The renderer state.

    • calculateItemWidth

      protected void calculateItemWidth(CategoryPlot plot, Rectangle2D dataArea, int rendererIndex, CategoryItemRendererState state)
      Calculates the bar width and stores it in the renderer state.
      Parameters:
      plot - the plot.
      dataArea - the data area.
      rendererIndex - the renderer index.
      state - the renderer state.

    • calculateBarW0

      protected double calculateBarW0(CategoryPlot plot, PlotOrientation orientation, Rectangle2D dataArea, CategoryAxis domainAxis, CategoryItemRendererState state, int row, int column)
      Calculates the coordinate of the first "side" of a bar. This will be the minimum x-coordinate for a vertical bar, and the minimum y-coordinate for a horizontal bar.
      Parameters:
      plot - the plot.
      orientation - the plot orientation.
      dataArea - the data area.
      domainAxis - the domain axis.
      state - the renderer state (has the bar width precalculated).
      row - the row index.
      column - the column index.
      Returns:
      The coordinate.

    • drawItem

      public void drawItem(Graphics2D g2, CategoryItemRendererState state, Rectangle2D dataArea, CategoryPlot plot, CategoryAxis domainAxis, ValueAxis rangeAxis, CategoryDataset dataset, int row, int column, int pass)
      Draws the bar for a single (series, category) data item.
      Specified by:
      drawItem in interface CategoryItemRenderer
      Parameters:
      g2 - the graphics device.
      state - the renderer state.
      dataArea - the data area.
      plot - the plot.
      domainAxis - the domain axis.
      rangeAxis - the range axis.
      dataset - the dataset.
      row - the row index (zero-based).
      column - the column index (zero-based).
      pass - the pass index.

    • calculateSeriesWidth

      protected double calculateSeriesWidth(double space, CategoryAxis axis, int categories, int series)
      Calculates the available space for each series.
      Parameters:
      space - the space along the entire axis (in Java2D units).
      axis - the category axis.
      categories - the number of categories.
      series - the number of series.
      Returns:
      The width of one series.

    • getItemMiddle

      public double getItemMiddle(Comparable rowKey, Comparable columnKey, CategoryDataset dataset, CategoryAxis axis, Rectangle2D area, RectangleEdge edge)
      Returns the Java2D coordinate for the middle of the specified data item.
      Specified by:
      getItemMiddle in interface CategoryItemRenderer
      Overrides:
      getItemMiddle in class AbstractCategoryItemRenderer
      Parameters:
      rowKey - the row key.
      columnKey - the column key.
      dataset - the dataset.
      axis - the axis.
      area - the drawing area.
      edge - the edge along which the axis lies.
      Returns:
      The Java2D coordinate.

    • equals

      public boolean equals(Object obj)
      Tests an object for equality with this instance.
      Overrides:
      equals in class AbstractCategoryItemRenderer
      Parameters:
      obj - the object (null permitted).
      Returns:
      A boolean.

    • hashCode

      public int hashCode()
      Returns a hash code for this instance.
      Overrides:
      hashCode in class AbstractCategoryItemRenderer
      Returns:
      A hash code.