Class 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:
  • Field Summary

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

    canvas, coords
  • Constructor Summary

    Constructors
    Constructor
    Description
    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
    Description
    void
    draw(Graphics g, boolean coordsch)
    Draws the grid if an update is required.
    Access method which returns the Color of the grid lines.
    double
    Access method to return the x spacing used between grid lines.
    double
    Access method to return the y spacing used between grid lines
    void
    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 Details

    • 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 Details

    • 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