com.jidesoft.chart.axis
Class IntegerTickCalculator

java.lang.Object
  com.jidesoft.chart.axis.DefaultNumericTickCalculator
      com.jidesoft.chart.axis.IntegerTickCalculator

All Implemented Interfaces:

NumericTickCalculator, TickCalculator<Double>

public class IntegerTickCalculator
extends DefaultNumericTickCalculator

A tick calculator that generates ticks only at integer values along the axis range.

Field Summary

Fields inherited from class com.jidesoft.chart.axis.DefaultNumericTickCalculator

PROPERTY_NUMBER_FORMAT, PROPERTY_TICK_INTERVALS_BETWEEN_MAJORS

Constructor Summary

IntegerTickCalculator()

Method Summary

Tick[]	calculateTicks(Range<Double> r) Works out where to place the tick markers.
double	getTolerance() Returns the current error tolerance used when determining if a number is an integer
void	setTolerance(double tolerance) Specify the tolerance to use for determining whether a number is an integer.

Methods inherited from class com.jidesoft.chart.axis.DefaultNumericTickCalculator

addPropertyChangeListener, getMinorTickIntervalBetweenMajors, getNumberFormat, removePropertyChangeListener, setMinorTickIntervalBetweenMajors, setNumberFormat, setNumberFormat

Methods inherited from class java.lang.Object

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

Constructor Detail

IntegerTickCalculator

public IntegerTickCalculator()

Method Detail

getTolerance

public double getTolerance()

Returns the current error tolerance used when determining if a number is an integer

Returns:

the current error tolerance

setTolerance

public void setTolerance(double tolerance)

Specify the tolerance to use for determining whether a number is an integer. Due to imprecise arithmetic there are bound to be some small errors that we need to take account of when answering this question, so we allow for a small error tolerance, as specified by this property. For example, with a value of 0.01 for the tolerance the number 4.01 is deemed close enough to 4 to be called an integer. In practice, we should be using smaller values than 0.01. By default, the tolerance is set at 1×10^-10.

Parameters:

tolerance - the tolerance to use when determining if a value is an integer

calculateTicks

public Tick[] calculateTicks(Range<Double> r)

Works out where to place the tick markers.

Specified by:

calculateTicks in interface TickCalculator<Double>

Overrides:

calculateTicks in class DefaultNumericTickCalculator

Returns:

an array of tick values