org.opensourcephysics.display
Class Circle

java.lang.Object
  org.opensourcephysics.display.Circle

All Implemented Interfaces:

Drawable

Direct Known Subclasses:

MeasuredCircle, TrackableCircle

public class Circle
extends java.lang.Object
implements Drawable

A Drawable circle that uses awt drawing.

Version:

1.0

Author:

Wolfgang Christian

Field Summary

java.awt.Color	color
int	pixRadius
protected double	x
protected double	y

Constructor Summary

Circle()
Constructs a fixed radius circle at the origin.

Circle(double _x, double _y)
Constructs a fixed radius circle at the given coordinates.

Circle(double _x, double _y, int _r)
Constructs a fixed radius circle at the given coordinates with the given radius.

Method Summary

void	draw(DrawingPanel panel, java.awt.Graphics g) Draws the circle.
static XML.ObjectLoader	getLoader() Gets a loader that allows a Circle to be represented as XML data.
double	getX() Gets the x coordinate.
double	getY() Gets the y coordinate.
void	setX(double x) Sets the x coordinate.
void	setXY(double x, double y) Sets the x and y coordinates.
void	setY(double y) Sets the y coordinate.
java.lang.String	toString() Returns a string representation of the circle.

Methods inherited from class java.lang.Object

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

Field Detail

color

public java.awt.Color color

pixRadius

public int pixRadius

x

protected double x

y

protected double y

Constructor Detail

Circle

public Circle()

Constructs a fixed radius circle at the origin.

Circle

public Circle(double _x,
              double _y)

Constructs a fixed radius circle at the given coordinates. The default radius is 6 pixels.

Parameters:

_x -

_y -

Circle

public Circle(double _x,
              double _y,
              int _r)

Constructs a fixed radius circle at the given coordinates with the given radius. The radius is given in pixels.

Parameters:

_x -

_y -

_r -

Method Detail

draw

public void draw(DrawingPanel panel,
                 java.awt.Graphics g)

Draws the circle.

Specified by:

draw in interface Drawable

Parameters:

panel -

g -

getX

public double getX()

Gets the x coordinate.

Returns:

double x

setX

public void setX(double x)

Sets the x coordinate.

Parameters:

x -

getY

public double getY()

Gets the y coordinate.

Returns:

double y

setY

public void setY(double y)

Sets the y coordinate.

Parameters:

y -

setXY

public void setXY(double x,
                  double y)

Sets the x and y coordinates.

Parameters:

x -

y -

toString

public java.lang.String toString()

Returns a string representation of the circle.

Overrides:

toString in class java.lang.Object

Returns:

String

getLoader

public static XML.ObjectLoader getLoader()

Gets a loader that allows a Circle to be represented as XML data. Objects without XML loaders cannot be saved and retrieved from an XML file.

Returns:

ObjectLoader