ucar.visad.display
Class ContourLevels

java.lang.Object
  ucar.visad.display.ContourLevels

Direct Known Subclasses:

IrregularContourLevels, RegularContourLevels

public abstract class ContourLevels
extends Object

Provides support for contour levels. Instances are immutable.

Version:

$Revision: 1.10 $

Author:

Steven R. Emmerson

Constructor Summary

protected	ContourLevels() Constructs an instance.
protected	ContourLevels(float base) Constructs an instance with a given base contour level.

Method Summary

float	getBase() Returns the base contour level.
abstract float[]	getLevels(float minimum, float maximum) Gets the contour levels given a data range.
abstract void	setControl(ContourControl control) Sets a VisAD ContourControl.
abstract void	setControl(ContourControl control, float minimum, float maximum) Sets a VisAD ContourControl.

Methods inherited from class java.lang.Object

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

Constructor Detail

ContourLevels

protected ContourLevels()

Constructs an instance. The base contour level will be zero.

ContourLevels

protected ContourLevels(float base)

Constructs an instance with a given base contour level.

Parameters:

base - The base contour level.

Method Detail

getBase

public final float getBase()

Returns the base contour level. The base contour level either determines the transition between dashed and solid contour lines or is a contour line value.

Returns:

The base contour level.

getLevels

public abstract float[] getLevels(float minimum,
                                  float maximum)
                           throws VisADException

Gets the contour levels given a data range.

Parameters:

minimum - The minimum data value.

maximum - The maximum data value.

Returns:

Contour levels appropriate for the given data range. No contour level will lie outside the range. The levels will be ordered by increasing value.

Throws:

VisADException - Invalid range extrema or VisAD failure.

setControl

public abstract void setControl(ContourControl control)
                         throws VisADException,
                                RemoteException

Sets a VisAD ContourControl.

Parameters:

control - The VisAD ContourControl to be set by this object.

Throws:

VisADException - Couldn't perform necessary VisAD operation.

RemoteException - Java RMI failure.

setControl

public abstract void setControl(ContourControl control,
                                float minimum,
                                float maximum)
                         throws VisADException,
                                RemoteException

Sets a VisAD ContourControl.

Parameters:

control - The VisAD ContourControl to be set by this object.

minimum - The minimum value. It shall not be Float.NEGATIVE_INFINITY

maximum - The maximum value. It shall not be Float.POSITIVE_INFINITY

Throws:

VisADException - Couldn't perform necessary VisAD operation.

RemoteException - Java RMI failure.