org.jdesktop.swingx
Class JXGraph.Plot

java.lang.Object
  org.jdesktop.beans.AbstractBean
      org.jdesktop.swingx.JXGraph.Plot

Enclosing class:

JXGraph

public abstract static class JXGraph.Plot
extends AbstractBean

A plot represents a mathematical transformation used by JXGraph. When a plot belongs to a graph, the graph component asks for the transformation of a value along the X axis. The resulting value defines the Y coordinates at which the graph must draw a spot of color.

Here is a sample implemention of this class that draws a straight line once added to a graph (it follows the well-known equation y=a.x+b):

 class LinePlot extends JXGraph.Plot {
     public double compute(double value) {
         return 2.0 * value + 1.0;
     }
 }
 

When a plot is added to an instance of JXGraph, the JXGraph automatically becomes a new property change listener of the plot. If property change events are fired, the graph will be updated accordingly.

More information about plots usage can be found in JXGraph in the section entitled Plots.

See Also:

JXGraph, JXGraph.addPlots(Color, JXGraph.Plot...)

Constructor Summary

protected

JXGraph.Plot() Creates a new, parameter-less plot.

Method Summary

abstract double

compute(double value) This method must return the result of a mathematical transformation of its sole parameter.

Methods inherited from class org.jdesktop.beans.AbstractBean

addPropertyChangeListener, addPropertyChangeListener, addVetoableChangeListener, addVetoableChangeListener, clone, fireIndexedPropertyChange, firePropertyChange, firePropertyChange, fireVetoableChange, fireVetoableChange, getPropertyChangeListeners, getPropertyChangeListeners, getVetoableChangeListeners, getVetoableChangeListeners, hasPropertyChangeListeners, hasVetoableChangeListeners, removePropertyChangeListener, removePropertyChangeListener, removeVetoableChangeListener, removeVetoableChangeListener

Methods inherited from class java.lang.Object

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

Constructor Detail

JXGraph.Plot

protected JXGraph.Plot()

Creates a new, parameter-less plot.

Method Detail

compute

public abstract double compute(double value)

This method must return the result of a mathematical transformation of its sole parameter.

Parameters:

value - a value along the X axis of the graph currently drawing this plot

Returns:

the result of the mathematical transformation of value