: Class LawnViewer

Overview

Package

Class

Tree

Deprecated

Index

Help

PREV CLASS NEXT CLASS

FRAMES NO FRAMES

SUMMARY: INNER | FIELD | CONSTR | METHOD

DETAIL: FIELD | CONSTR | METHOD

gpsys.lawnmower
Class LawnViewer

java.lang.Object
  |
  +--java.awt.Component
        |
        +--java.awt.Canvas
              |
              +--gpsys.lawnmower.LawnViewer

public class LawnViewer
extends java.awt.Canvas
implements LawnObserver

Provides a view of the lawn and lawnmower on the lawn.

Version:: $Revision: 1.1 $, $Date: 2000/07/05 16:26:49 $
Author:: Adil Qureshi
Department of Computer Science,

University College London,

Gower St,

London WC1E 6BT,

UK.
See Also:: Lawn, LawnObserver, Serialized Form

Inner classes inherited from class java.awt.Component

java.awt.Component.AWTTreeLock

Field Summary
`(package private) Lawn`	`lawn` The lawn being monitored.
`(package private) int`	`mowerX` The current X-coordinate of the lawnmower.
`(package private) int`	`mowerY` The current Y-coordinate of the lawnmower.

Fields inherited from class java.awt.Canvas

base,  
graphicsConfig,  
nameCounter,  
serialVersionUID

Fields inherited from class java.awt.Component

actionListenerK,  
adjustmentListenerK,  
appContext,  
assert,  
background,  
BOTTOM_ALIGNMENT,  
CENTER_ALIGNMENT,  
changeSupport,  
componentListener,  
componentListenerK,  
componentOrientation,  
componentSerializedDataVersion,  
containerListenerK,  
cursor,  
dropTarget,  
enabled,  
eventMask,  
focusListener,  
focusListenerK,  
font,  
foreground,  
hasFocus,  
height,  
incRate,  
inputMethodListener,  
inputMethodListenerK,  
isInc,  
isPacked,  
itemListenerK,  
keyListener,  
keyListenerK,  
LEFT_ALIGNMENT,  
locale,  
LOCK,  
minSize,  
mouseListener,  
mouseListenerK,  
mouseMotionListener,  
mouseMotionListenerK,  
name,  
nameExplicitlySet,  
newEventsOnly,  
ownedWindowK,  
parent,  
peer,  
peerFont,  
popups,  
prefSize,  
RIGHT_ALIGNMENT,  
serialVersionUID,  
textListenerK,  
TOP_ALIGNMENT,  
valid,  
visible,  
width,  
windowListenerK,  
x,  
y

Constructor Summary
`LawnViewer(Lawn lawn)` Create a new LawnViewer Object which provides a view of the specified Lawn.

Method Summary
`void`	`init()` Initialise the position of the mower on the lawn.
`void`	`lawnCutting(int x, int y)` Update the lawn view when a square on the lawn is being cut.
`void`	`lawnGrown()` Update the lawn view when the lawn regrows.
`void`	`paint(java.awt.Graphics g)` Override the Canvas paint() method so that the lawn and lawnmower is drawn on the Canvas.
`void`	`update(java.awt.Graphics g)` Override the Canvas update() method so that the Canvas is not cleared before it is redrawn.

Methods inherited from class java.awt.Canvas

, 
addNotify, 
constructComponentName, 
postsOldMouseEvents

Methods inherited from class java.awt.Component

action, 
add, 
addComponentListener, 
addFocusListener, 
addInputMethodListener, 
addKeyListener, 
addMouseListener, 
addMouseMotionListener, 
addPropertyChangeListener, 
addPropertyChangeListener, 
areInputMethodsEnabled, 
bounds, 
checkImage, 
checkImage, 
coalesceEvents, 
contains, 
contains, 
createImage, 
createImage, 
deliverEvent, 
disable, 
disableEvents, 
dispatchEvent, 
dispatchEventImpl, 
doLayout, 
enable, 
enable, 
enableEvents, 
enableInputMethods, 
eventEnabled, 
firePropertyChange, 
getAlignmentX, 
getAlignmentY, 
getBackground, 
getBounds, 
getBounds, 
getColorModel, 
getComponentAt, 
getComponentAt, 
getComponentOrientation, 
getCursor, 
getDropTarget, 
getFont_NoClientCode, 
getFont, 
getFontMetrics, 
getForeground, 
getGraphics, 
getHeight, 
getInputContext, 
getInputMethodRequests, 
getLocale, 
getLocation, 
getLocation, 
getLocationOnScreen, 
getMaximumSize, 
getMinimumSize, 
getName, 
getNativeContainer, 
getParent_NoClientCode, 
getParent, 
getPeer, 
getPreferredSize, 
getSize, 
getSize, 
getToolkit, 
getToolkitImpl, 
getTreeLock, 
getWidth, 
getWindowForObject, 
getX, 
getY, 
gotFocus, 
handleEvent, 
hasFocus, 
hide, 
imageUpdate, 
initIDs, 
inside, 
invalidate, 
isDisplayable, 
isDoubleBuffered, 
isEnabled, 
isEnabledImpl, 
isFocusTraversable, 
isLightweight, 
isOpaque, 
isShowing, 
isValid, 
isVisible, 
keyDown, 
keyUp, 
layout, 
lightweightPrint, 
list, 
list, 
list, 
list, 
list, 
locate, 
location, 
lostFocus, 
minimumSize, 
mouseDown, 
mouseDrag, 
mouseEnter, 
mouseExit, 
mouseMove, 
mouseUp, 
move, 
nextFocus, 
paintAll, 
paramString, 
postEvent, 
preferredSize, 
prepareImage, 
prepareImage, 
print, 
printAll, 
processComponentEvent, 
processEvent, 
processFocusEvent, 
processInputMethodEvent, 
processKeyEvent, 
processMouseEvent, 
processMouseMotionEvent, 
readObject, 
remove, 
removeComponentListener, 
removeFocusListener, 
removeInputMethodListener, 
removeKeyListener, 
removeMouseListener, 
removeMouseMotionListener, 
removeNotify, 
removePropertyChangeListener, 
removePropertyChangeListener, 
repaint, 
repaint, 
repaint, 
repaint, 
requestFocus, 
reshape, 
resize, 
resize, 
setBackground, 
setBounds, 
setBounds, 
setComponentOrientation, 
setCursor, 
setDropTarget, 
setEnabled, 
setFont, 
setForeground, 
setLocale, 
setLocation, 
setLocation, 
setName, 
setSize, 
setSize, 
setVisible, 
show, 
show, 
size, 
toString, 
transferFocus, 
validate, 
writeObject

Methods inherited from class java.lang.Object

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

Field Detail

lawn

Lawn lawn

The lawn being monitored.

mowerX

int mowerX

The current X-coordinate of the lawnmower.

mowerY

int mowerY

The current Y-coordinate of the lawnmower.

Constructor Detail

LawnViewer

public LawnViewer(Lawn lawn)

Create a new LawnViewer Object which provides a view of the specified Lawn.

Parameters:: lawn - The Lawn being viewed.

Method Detail

init

public void init()

Initialise the position of the mower on the lawn.

update

public void update(java.awt.Graphics g)

Override the Canvas update() method so that the Canvas is not cleared before it is redrawn.

Parameters:: g - The graphics Object associated with the Canvas.
Overrides:: update in class java.awt.Component

paint

public void paint(java.awt.Graphics g)

Override the Canvas paint() method so that the lawn and lawnmower is drawn on the Canvas.

Parameters:: g - The graphics Object associated with the Canvas.
Overrides:: paint in class java.awt.Canvas

lawnGrown

public void lawnGrown()

Update the lawn view when the lawn regrows.

Specified by:: lawnGrown in interface LawnObserver

lawnCutting

public void lawnCutting(int x,
                        int y)

Update the lawn view when a square on the lawn is being cut.

Specified by:: lawnCutting in interface LawnObserver
Parameters:: x - The X-coordinate of the square being cut.; y - The Y-coordinate of the square being cut.