Class OrandaNav

java.lang.Object
   |
   +----java.awt.Component
           |
           +----java.awt.Container
                   |
                   +----java.awt.Panel
                           |
                           +----java.applet.Applet
                                   |
                                   +----OrandaNav

public class OrandaNav

extends Applet

implements Runnable

OrandaNav()

anyLinkHighlighted()

Gets the index of a main link which has been highlighted.

drawBackground()

Draws the background of the nav applet and the sub-links.

drawLinks()

Draws the links for the nav applet.

drawLinkString(Graphics, int)

Calculate the position in which to draw a main link, and draw it.

drawSubLinks(Graphics, int)

Draw the second layer of links, highlighting one if it has been flagged by a MouseOver event.

getParameters()

Get the parameters.

init()

Initialise the fonts, colors, offscreenImage, and create all the links

mouseDown(Event, int, int)

If there is a mouse click, see what the last link flagged by MouseOver was and go to the corresponding URL.

mouseEnter(Event, int, int)

The same code as mouseMove: it is a "boundary case".

mouseExit(Event, int, int)

The same code as mouseMove: it is a "boundary case".

mouseMove(Event, int, int)

Whenever the pointer moves in the Graphics area, check if it has moved over a link or sublink, and if so, flag that link or sublink.

paint(Graphics)

Copy the offscreenImage to the screen.

run()

Keep painting.

start()

Start the thread.

stop()

Stop the thread.

update(Graphics)

Draw the image in memory before copying to the screen.

 public OrandaNav()

 public void init()

Initialise the fonts, colors, offscreenImage, and create all the links

Overrides:

init in class Applet

 public void start()

Start the thread.

Overrides:

start in class Applet

 public void stop()

Stop the thread.

Overrides:

stop in class Applet

 public void run()

Keep painting.

 public void paint(Graphics g)

Copy the offscreenImage to the screen.

Overrides:

paint in class Container

 public void update(Graphics g)

Draw the image in memory before copying to the screen.

Overrides:

update in class Component

 public void drawBackground()

Draws the background of the nav applet and the sub-links.

 public int anyLinkHighlighted()

Gets the index of a main link which has been highlighted.

 public void drawLinks()

Draws the links for the nav applet.

 public void drawLinkString(Graphics gr,
                            int i)

Calculate the position in which to draw a main link, and draw it.

 public void drawSubLinks(Graphics gr,
                          int i)

Draw the second layer of links, highlighting one if it has been flagged by a MouseOver event.

 public boolean mouseDown(Event evt,
                          int x,
                          int y)

If there is a mouse click, see what the last link flagged by MouseOver was and go to the corresponding URL.

Overrides:

mouseDown in class Component

 public boolean mouseMove(Event evt,
                          int x,
                          int y)

Whenever the pointer moves in the Graphics area, check if it has moved over a link or sublink, and if so, flag that link or sublink.

Overrides:

mouseMove in class Component

 public boolean mouseEnter(Event evt,
                           int x,
                           int y)

The same code as mouseMove: it is a "boundary case".

Overrides:

mouseEnter in class Component

 public boolean mouseExit(Event evt,
                          int x,
                          int y)

The same code as mouseMove: it is a "boundary case".

Overrides:

mouseExit in class Component

 public void getParameters()

Get the parameters.