edu.hws.jcm.draw

Class Grid

java.lang.Object

edu.hws.jcm.draw.Drawable

edu.hws.jcm.draw.Grid

All Implemented Interfaces:

Serializable

public class Grid
extends Drawable

A Grid object draws a graph paper-like grid on a Canvas. The pixel width and height between adjacent grid lines is specified as a parameter to the constructer, or through the access methods "setXSP(double)" and "setYSP(double)". Note that the spacing will be scaled to between PIX_MIN and PIX_MAX (20 and 80, respectively, by default). The color of the grid lines can be set, and defaults to (220, 220, 220).

This class was written by Gabriel Weinstock (with some modifications by David Eck).

See Also:

Serialized Form

Field Summary

Fields inherited from class edu.hws.jcm.draw.Drawable

canvas, coords

Constructor Summary

Constructors

Constructor and Description
Grid() Create a Grid object with x and y spacing 1.0.
Grid(double xspace, double yspace) Create a Grid object with spacing specified.

Method Summary

Modifier and Type	Method and Description
void	draw(Graphics g, boolean coordsch) Draws the grid if an update is required.
Color	getColor() Access method which returns the Color of the grid lines.
double	getXSP() Access method to return the x spacing used between grid lines.
double	getYSP() Access method to return the y spacing used between grid lines
void	setColor(Color c) Method to set the Color used to draw grid lines.
void	setXSP(double x) Method to set the x spacing between grid lines.
void	setYSP(double y) Method to set the y spacing between grid lines.

Methods inherited from class edu.hws.jcm.draw.Drawable

getVisible, needsRedraw, setOwnerData, setVisible

Methods inherited from class java.lang.Object

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

Constructor Detail

Grid

public Grid()

Create a Grid object with x and y spacing 1.0. This does not mean that the actual spacing between grid lines will be 1. It will be some reasonable fraction or multiply of 1, with the value chosen to give a reasonable spacing between the grid lines.

Grid

public Grid(double xspace,
            double yspace)

Create a Grid object with spacing specified.

Method Detail

getColor

public Color getColor()

Access method which returns the Color of the grid lines.

setColor

public void setColor(Color c)

Method to set the Color used to draw grid lines.

getXSP

public double getXSP()

Access method to return the x spacing used between grid lines.

getYSP

public double getYSP()

Access method to return the y spacing used between grid lines

setXSP

public void setXSP(double x)

Method to set the x spacing between grid lines. This does not mean that the actual spacing between grid lines will be x. It will be some reasonable fraction or multiply of s, with the value chosen to give a reasonable spacing between the grid lines.

setYSP

public void setYSP(double y)

Method to set the y spacing between grid lines. This does not mean that the actual spacing between grid lines will be y. It will be some reasonable fraction or multiply of s, with the value chosen to give a reasonable spacing between the grid lines.

draw

public void draw(Graphics g,
                 boolean coordsch)

Draws the grid if an update is required. This is not usually called directly.

Specified by:

draw in class Drawable

Parameters:

g - the Graphics context

coordsch - boolean describing whether coordinates have changed