org.faceless.graph.formatter
Class DiscreteFormatter

java.lang.Object
  extended by org.faceless.graph.formatter.Formatter
      extended by org.faceless.graph.formatter.DiscreteFormatter

public class DiscreteFormatter
extends Formatter

The DiscreteFormatter treats it's double argument as an index into a list of String values, and returns the matching String.

This is the formatter that's used to plot the String values on the X axis of a Bar Graph, but it's probably not suitable for general use.


Field Summary
 
Fields inherited from class org.faceless.graph.formatter.Formatter
MINIMAL, NORMAL, SPARSE
 
Constructor Summary
DiscreteFormatter(List list)
          Create a new DiscreteFormatter
 
Method Summary
 String format(double in)
          Return a String that is the formatted version of the input parameter.
 boolean isDiscrete()
          For this subclass, discrete returns true.
 double[] steps(double min, double max)
           Which steps between min and max should be marked on the axis.
 
Methods inherited from class org.faceless.graph.formatter.Formatter
setDensity, setFixedEnds
 
Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

DiscreteFormatter

public DiscreteFormatter(List list)
Create a new DiscreteFormatter

Parameters:
list - The list of values on the axis.
Method Detail

isDiscrete

public boolean isDiscrete()
For this subclass, discrete returns true.

Overrides:
isDiscrete in class Formatter

format

public String format(double in)
Description copied from class: Formatter
Return a String that is the formatted version of the input parameter.

Specified by:
format in class Formatter

steps

public double[] steps(double min,
                      double max)
Description copied from class: Formatter

Which steps between min and max should be marked on the axis. This is an array because although the steps will usually be evenly spaced, they may not always be (see the DateFormatter for an example).

This method returns the default settings, which is to calculate a number of "useful" values between min and max, possibly rounding those two values up or down to fit the scale. The number of values returned depends on the density setting.

Overrides:
steps in class Formatter


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