com.horstmann.violet.framework
Class Grid

java.lang.Object
  com.horstmann.violet.framework.Grid

public class Grid
extends java.lang.Object

A grid to which points and rectangles can be "snapped". The snapping operation moves a point to the nearest grid point.

Constructor Summary

Grid()
Constructs a grid with no grid points.

Method Summary

void	draw(java.awt.Graphics2D g2, java.awt.geom.Rectangle2D bounds) Draws this grid inside a rectangle.
void	setGrid(double x, double y) Sets the grid point distances in x- and y-direction
void	snap(java.awt.geom.Point2D p) Snaps a point to the nearest grid point
void	snap(java.awt.geom.Rectangle2D r) Snaps a rectangle to the nearest grid points

Methods inherited from class java.lang.Object

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

Constructor Detail

Grid

public Grid()

Constructs a grid with no grid points.

Method Detail

setGrid

public void setGrid(double x,
                    double y)

Sets the grid point distances in x- and y-direction

Parameters:

x - the grid point distance in x-direction

y - the grid point distance in y-direction

draw

public void draw(java.awt.Graphics2D g2,
                 java.awt.geom.Rectangle2D bounds)

Draws this grid inside a rectangle.

Parameters:

g2 - the graphics context

bounds - the bounding rectangle

snap

public void snap(java.awt.geom.Point2D p)

Snaps a point to the nearest grid point

Parameters:

p - the point to snap. After the call, the coordinates of p are changed so that p falls on the grid.

snap

public void snap(java.awt.geom.Rectangle2D r)

Snaps a rectangle to the nearest grid points

Parameters:

r - the rectangle to snap. After the call, the coordinates of r are changed so that all of its corners falls on the grid.