cs1.android

Class Line

java.lang.Object

cs1.android.Shape

cs1.android.Line

public class Line
extends Shape

Representation of a line drawn on the canvas.

Field Summary

Fields inherited from class cs1.android.Shape

DEFAULT_COLOR

Constructor Summary

Constructors

Constructor and Description
Line(double x1, double y1, double x2, double y2) Creates a line between the points with the given coordinates.
Line(Point p, Point q) Creates a line between the given points.

Method Summary

Methods

Modifier and Type	Method and Description
boolean	contains(Point p0) Determines if this line contains the given point.
void	draw(android.graphics.Canvas canvas) Draws this line on the given canvas.
Point	getCenter() Returns the center of this line.
Point	getP1() Returns the first point of this line.
Point	getP2() Returns the second point of this line.
void	move(double dx, double dy) Moves this line 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

Line

public Line(double x1,
    double y1,
    double x2,
    double y2)

Creates a line between the points with the given coordinates.

Parameters:

x1 - the x-coordinate of the first point

y1 - the y-coordinate of the first point

x2 - the x-coordinate of the second point

y2 - the y-coordinate of the second point

Line

public Line(Point p,
    Point q)

Creates a line between the given points.

Parameters:

p - the first point

q - the second point

Method Detail

contains

public boolean contains(Point p0)

Determines if this line contains the given point.

Specified by:

contains in class Shape

Parameters:

p0 - the point to check for containment

Returns:

true if this line contains the given point

draw

public void draw(android.graphics.Canvas canvas)

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

Specified by:

draw in class Shape

Parameters:

canvas - the canvas in which to draw this line

getCenter

public Point getCenter()

Returns the center of this line.

Specified by:

getCenter in class Shape

Returns:

the center of this line

getP1

public Point getP1()

Returns the first point of this line.

Returns:

the first point of this line

getP2

public Point getP2()

Returns the second point of this line.

Returns:

the second point of this line

move

public void move(double dx,
        double dy)

Moves this line by the given displacement.

Specified by:

move in class Shape

Parameters:

dx - the displacement in x

dy - the displacement in y