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

Fields

Modifier and Type	Field and Description
java.awt.Color	color
int	pixRadius
protected double	x
protected double	y

Constructor Summary

Constructors

Constructor and Description
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

Methods

Modifier and Type	Method and Description
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