cs1.android

Class Circle

java.lang.Object

cs1.android.Shape

cs1.android.Circle

public class Circle
extends Shape

Representation of a circle drawn on the canvas.

Field Summary

Fields inherited from class cs1.android.Shape

DEFAULT_COLOR

Constructor Summary

Constructors

Constructor and Description
Circle(double x, double y, double r) Creates a circle of the given radius and default color centered at the given coordinates.
Circle(Point cen, double r) Creates a circle of the given radius and default color centered at the given point.
Circle(Point cen, Point pt) Creates a circle of the default color going through the given center and point on the circumference.

Method Summary

Methods

Modifier and Type	Method and Description
boolean	contains(Point point) Determines if this circle contains the given point.
void	draw(android.graphics.Canvas canvas) Draws this circle on the given canvas.
Point	getCenter() Returns the center of this circle.
double	getRadius() Returns the radius of this circle.
void	move(double dx, double dy) Moves this circle by the given displacement.

Methods inherited from class cs1.android.Shape

distance_squared, distance, draw, erase, getColor, getLabel, setColor, setColor, setLabel

Methods inherited from class java.lang.Object

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

Constructor Detail

Circle

public Circle(double x,
      double y,
      double r)

Creates a circle of the given radius and default color centered at the given coordinates.

Parameters:

x - the x-coordinate of the circle center

y - the y-coordinate of the circle center

r - the radius of the circle

Circle

public Circle(Point cen,
      double r)

Creates a circle of the given radius and default color centered at the given point.

Parameters:

cen - the center of the circle

r - the radius of the circle

Circle

public Circle(Point cen,
      Point pt)

Creates a circle of the default color going through the given center and point on the circumference.

Parameters:

cen - the center of the circle

pt - a point on the circumference of the circle

Method Detail

contains

public boolean contains(Point point)

Determines if this circle contains the given point.

Specified by:

contains in class Shape

Parameters:

point - the point to check for containment

Returns:

true if this circle contains the given point

draw

public void draw(android.graphics.Canvas canvas)

Draws this circle on the given canvas. Should not be used directly.

Specified by:

draw in class Shape

Parameters:

canvas - the canvas in which to draw this circle

getCenter

public Point getCenter()

Returns the center of this circle.

Specified by:

getCenter in class Shape

Returns:

the center of this circle

getRadius

public double getRadius()

Returns the radius of this circle.

Returns:

the radius of this circle

move

public void move(double dx,
        double dy)

Moves this circle by the given displacement.

Specified by:

move in class Shape

Parameters:

dx - the displacement in x

dy - the displacement in y