org.problets.lib.io.output.overlay
Class OverlayArrow

java.lang.Object
  org.problets.lib.io.output.overlay.Overlay
      org.problets.lib.io.output.overlay.OverlayArrow

public class OverlayArrow
extends Overlay

Class which either animates an arrow by expanding it from one pixel, or draws an arrow without animating it. The arrow is created by drawing a pie of a circle for the head of the arrow and a rectangle for the base of the arrow

Author:

Tihomir Piskuliyski

Field Summary

static int

NORTH

Constructor Summary

OverlayArrow(java.lang.String inSize, java.lang.String inDirection, java.awt.Color inColor)
The constructor takes values for the size of the arrow, a string indicating the direction in whcih the arrow points, and the color of the arrow

Method Summary

void	animate(java.awt.Graphics g, int x, int y) Animates an arrow.
void	draw(java.awt.Graphics g, int x, int y) Draws an arrow.

Methods inherited from class org.problets.lib.io.output.overlay.Overlay

getHeight, getWidth

Methods inherited from class java.lang.Object

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

Field Detail

NORTH

public static final int NORTH

See Also:

Constant Field Values

Constructor Detail

OverlayArrow

public OverlayArrow(java.lang.String inSize,
                    java.lang.String inDirection,
                    java.awt.Color inColor)

The constructor takes values for the size of the arrow, a string indicating the direction in whcih the arrow points, and the color of the arrow

Parameters:

inSize - The Size of the arrow whcih can be an integer value from 1 to 3 If a different value if passed a default value of 2 is chosen

inDirection - The direction in which the arrow points.

inColor - The color of the arrow

Method Detail

draw

public void draw(java.awt.Graphics g,
                 int x,
                 int y)

Draws an arrow. First a ractangle si drawn for the base of the arrow. Then a pie of a circle with angle spread ANGLE is drawn as the head of the arrow. Then the arrow is rotated in the direction inwhcih it is supposed to point

Overrides:

draw in class Overlay

Parameters:

g - The graphical context of the applet

x - The x coordinate of the tip of the arrow

y - The y coordinate of the tip of the arrow

animate

public void animate(java.awt.Graphics g,
                    int x,
                    int y)

Animates an arrow. If the arrow is animated once and the applet has to be redrawn, the function only draws the arrow without animating it. First the function animates a rectangle which serves for the base of the arrow. This is done by drawing one line each MillisecondsIterator milli senconds from the bottom to the top of the rectangle. Then the head of the arrow is drawn by drawing an smaller and smaller archs each MillisecondsIterator milli senconds till the tip of the arrow is reached. Then the arrow is rotated in the direction inwhcih it is supposed to point

Overrides:

animate in class Overlay

Parameters:

g - The graphical context of the applet

x - The x coordinate of the tip of the arrow

y - The y coordinate of the tip of the arrow