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 implementation 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.
JXGraph
,
JXGraph.addPlots(Color, JXGraph.Plot...)
Modifier | Constructor and Description |
---|---|
protected |
Plot()
Creates a new, parameter-less plot.
|
Modifier and Type | Method and Description |
---|---|
abstract double |
compute(double value)
This method must return the result of a mathematical
transformation of its sole parameter.
|
addPropertyChangeListener, addPropertyChangeListener, addVetoableChangeListener, addVetoableChangeListener, clone, fireIndexedPropertyChange, firePropertyChange, firePropertyChange, fireVetoableChange, fireVetoableChange, getPropertyChangeListeners, getPropertyChangeListeners, getVetoableChangeListeners, getVetoableChangeListeners, hasPropertyChangeListeners, hasVetoableChangeListeners, removePropertyChangeListener, removePropertyChangeListener, removeVetoableChangeListener, removeVetoableChangeListener
public abstract double compute(double value)
This method must return the result of a mathematical transformation of its sole parameter.
value
- a value along the X axis of the graph currently
drawing this plotCopyright © 2017. All rights reserved.