objectdraw
Class Line

java.lang.Object
  objectdraw.Drawable
      objectdraw.Line

All Implemented Interfaces:

Serializable, Drawable1DInterface, DrawableInterface

Direct Known Subclasses:

AngLine

public class Line
extends Drawable
implements Drawable1DInterface

Line is an implementation of a drawable line segment object.

Version:

1.1.1 released February 2005

See Also:

Serialized Form

Field Summary

protected Location	end The line's second endpoint.
protected Location	start The line's first endpoint.

Fields inherited from class objectdraw.Drawable

canvasContent, color, shown

Constructor Summary

Line(double startx, double starty, double endx, double endy, DrawingCanvas c)
Creates a new Line object going from (startx,starty) to (endx,endy).

Line(Location start, Location end, DrawingCanvas canvas)
Creates a new Line object going from start to end.

Method Summary

boolean	contains(Location point) Determines if a particular position on the DrawingCanvas is contained within the object.
(package private) void	draw(Graphics g) Draws the object.
Location	getEnd() Gets the line's end point.
Location	getStart() Gets the line's start point.
void	move(double dx, double dy) Moves the object within the canvas in the x and y direction by the amounts specified as parameters.
void	moveTo(double x, double y) Moves the object within the canvas to the x and y coordinates provided.
void	setEnd(double x, double y) Sets the line's end point.
void	setEnd(Location point) Sets the line's end point.
void	setEndPoints(double x1, double y1, double x2, double y2) Sets the line's end points.
void	setEndPoints(Location start, Location end) Sets the line's end points.
void	setStart(double x, double y) Sets the line's start point.
void	setStart(Location point) Sets the line's start point.
String	toString() Generates a string representation of the object.

Methods inherited from class objectdraw.Drawable

addToCanvas, clearCanvasContent, getCanvas, getColor, hide, isHidden, moveTo, removeFromCanvas, sendBackward, sendForward, sendToBack, sendToFront, setCanvasContent, setColor, setStateChanged, show

Methods inherited from class java.lang.Object

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

Methods inherited from interface objectdraw.DrawableInterface

addToCanvas, getCanvas, getColor, hide, isHidden, moveTo, removeFromCanvas, sendBackward, sendForward, sendToBack, sendToFront, setColor, show

Field Detail

end

protected Location end

The line's second endpoint.

start

protected Location start

The line's first endpoint.

Constructor Detail

Line

public Line(double startx,
            double starty,
            double endx,
            double endy,
            DrawingCanvas c)

Creates a new Line object going from (startx,starty) to (endx,endy).

Parameters:

startx - x-coordinate of the first endpoint

starty - y-coordinate of the second endpoint

endx - x-coordinate of the second endpoint

endy - y-coordinate of the second endpoint

c - the canvas in which the line is created.

Line

public Line(Location start,
            Location end,
            DrawingCanvas canvas)

Creates a new Line object going from start to end.

Parameters:

start - the starting point of the line.

end - the destination point of the line.

canvas - the canvas in which the line is created.

Method Detail

contains

public boolean contains(Location point)

Description copied from interface: DrawableInterface

Determines if a particular position on the DrawingCanvas is contained within the object.

Specified by:

contains in interface DrawableInterface

Specified by:

contains in class Drawable

Parameters:

point - the position on the canvas.

Returns:

true if point is contained in the object, false otherwise.

draw

void draw(Graphics g)

Draws the object.

Overrides:

draw in class Drawable

Parameters:

g - the graphics context into which the object is drawn.

getEnd

public Location getEnd()

Description copied from interface: Drawable1DInterface

Gets the line's end point.

Specified by:

getEnd in interface Drawable1DInterface

Returns:

the end point

getStart

public Location getStart()

Description copied from interface: Drawable1DInterface

Gets the line's start point.

Specified by:

getStart in interface Drawable1DInterface

Returns:

the start point

move

public void move(double dx,
                 double dy)

Description copied from interface: DrawableInterface

Moves the object within the canvas in the x and y direction by the amounts specified as parameters.

Specified by:

move in interface DrawableInterface

Specified by:

move in class Drawable

Parameters:

dx - the amount to move in the x-direction.

dy - the amount to move in the y-direction.

moveTo

public void moveTo(double x,
                   double y)

Description copied from interface: DrawableInterface

Moves the object within the canvas to the x and y coordinates provided.

Specified by:

moveTo in interface DrawableInterface

Overrides:

moveTo in class Drawable

Parameters:

x - horizontal coordinate of destination.

y - horizontal coordinate of destination.

setEnd

public void setEnd(double x,
                   double y)

Description copied from interface: Drawable1DInterface

Sets the line's end point.

Specified by:

setEnd in interface Drawable1DInterface

Parameters:

x - x coordinate of new end point

y - y coordinate of new end point

setEnd

public void setEnd(Location point)

Description copied from interface: Drawable1DInterface

Sets the line's end point.

Specified by:

setEnd in interface Drawable1DInterface

Parameters:

point - new endpoint

setEndPoints

public void setEndPoints(double x1,
                         double y1,
                         double x2,
                         double y2)

Description copied from interface: Drawable1DInterface

Sets the line's end points.

Specified by:

setEndPoints in interface Drawable1DInterface

Parameters:

x1 - x coordinate of start

y1 - y coordinate of start

x2 - x coordinate of end

y2 - y coordinate of end

setEndPoints

public void setEndPoints(Location start,
                         Location end)

Description copied from interface: Drawable1DInterface

Sets the line's end points.

Specified by:

setEndPoints in interface Drawable1DInterface

Parameters:

start - first endpoint

end - second endpoint

setStart

public void setStart(double x,
                     double y)

Description copied from interface: Drawable1DInterface

Sets the line's start point.

Specified by:

setStart in interface Drawable1DInterface

Parameters:

x - x coordinate of new start point

y - y coordinate of new start point

setStart

public void setStart(Location point)

Description copied from interface: Drawable1DInterface

Sets the line's start point.

Specified by:

setStart in interface Drawable1DInterface

Parameters:

point - new start point

toString

public String toString()

Generates a string representation of the object.

Overrides:

toString in class Object

Returns:

string representation of the object