Class MainApplet

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

All Implemented Interfaces:

javax.accessibility.Accessible, java.util.EventListener, java.awt.image.ImageObserver, java.awt.MenuContainer, java.awt.event.MouseListener, java.awt.event.MouseMotionListener, java.lang.Runnable, java.io.Serializable

public class MainApplet

extends java.applet.Applet

implements java.lang.Runnable, java.awt.event.MouseListener, java.awt.event.MouseMotionListener

CLASS: MainApplet
PURPOSE: This class handle all the GUI action and this is also the main class for the applet
IMPORT: java.applet.Applet, java.awt.Graphics, java.awt.Image, java.awt.MediaTracker, java.awt.Color, java.awt.event.MouseListener, java.awt.event.MouseMotionListener, java.awt.event.MouseEvent, FlyManager, FlyCreator
EXPORT: New Class|MainApplet
New Method| destroy, init, mouseClicked, mouseDragged, mouseEntered, mouseExited, mouseMoved, mousePressed, mouseReleased, paint, run, setEyePos, update, drawFrog

See Also:

Serialized Form

Inner classes inherited from class java.applet.Applet

java.applet.Applet.AccessibleApplet

Inner classes inherited from class java.awt.Panel

java.awt.Panel.AccessibleAWTPanel

Inner classes inherited from class java.awt.Container

java.awt.Container.AccessibleAWTContainer

Inner classes inherited from class java.awt.Component

java.awt.Component.AccessibleAWTComponent, java.awt.Component.AWTTreeLock

Field Summary

private java.lang.Thread	animation Thread for animation
private java.awt.Graphics	backBufferGraphics Graphic context associate with the back image buffer
private java.awt.Image	backBufferImage Back Image buffer for drawing
private int	drawTongue delay for drawing the tongue
private int	eye_x position of the frog's eye (x)
private int	eye_y position of the frog's eye (y)
private int	eyeCenterX position of the center of frog's eye (x)
private int	eyeCenterY position of the center of frog's eye (y)
private int	eyeEmotion For displaying eye emotion, happy, sad, netural
private int	eyeSize size of the frog's eye
private int	eyeXOffset x offset for drawing the frog's eye
private int	eyeYOffset y offset for drawing the frog's eye
private FlyCreator	fc FlyCreator for creating fly
private java.awt.Image	flyImage Fly image
private FlyManager	fm FlyManager for eating fly
private java.awt.Image	frogEatImage Frog image (eating)
private int	frogHeight Height of the frog image in pixel
private java.awt.Image	frogImage Frog image (still)
private int	frogWidth Width of the frog image in pixel
private int	frogY_pos position of the frog image
private int	height Display Height of the applet
private int	mouth_x position of the mouth(x)
private int	mouth_y position of the mouth(y)
private long	refreshRate rehresh rate in millisecond
private int	tongue_x destination of the tongue (x)
private int	tongue_y destination of the tongue (y)
private int	width Display Width of the applet

Fields inherited from class java.applet.Applet

accessibleContext, serialVersionUID, stub

Fields inherited from class java.awt.Panel

base, nameCounter

Fields inherited from class java.awt.Container

component, containerListener, containerSerializedDataVersion, dbg, dispatcher, layoutMgr, listeningBoundsChildren, listeningChildren, maxSize, ncomponents, printing, printingThreads

Fields inherited from class java.awt.Component

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

Fields inherited from interface java.awt.image.ImageObserver

ABORT, ALLBITS, ERROR, FRAMEBITS, HEIGHT, PROPERTIES, SOMEBITS, WIDTH

Constructor Summary

MainApplet()

Method Summary

void	destroy() PRE: NONE POST: Clean up the thread
private void	drawFrog(java.awt.Graphics g) PRE: A valid Graphics object POST: Draw the frog onto the Graphics object
void	init() PRE: NONE POST: Initialize all variables and start all the threads
void	mouseClicked(java.awt.event.MouseEvent e) PRE: A valid MouseEvent object POST: Nothing.
void	mouseDragged(java.awt.event.MouseEvent e) PRE: A valid MouseEvent object POST: Nothing.
void	mouseEntered(java.awt.event.MouseEvent e) PRE: A valid MouseEvent object POST: Nothing.
void	mouseExited(java.awt.event.MouseEvent e) PRE: A valid MouseEvent object POST: set the eye position to center
void	mouseMoved(java.awt.event.MouseEvent e) PRE: A valid MouseEvent object POST: Set eye position according to the mouse movement
void	mousePressed(java.awt.event.MouseEvent e) PRE: A valid MouseEvent object POST: try to eat the fly and set the animations
void	mouseReleased(java.awt.event.MouseEvent e) PRE: A valid MouseEvent object POST: Nothing.
void	paint(java.awt.Graphics g) PRE: A valid Graphics object POST: Paint all the objects
void	run() PRE: NONE POST: Refresh the screen in a timely manner and move the flies too
void	setEyePos(int x, int y) PRE: NONE POST: set the eye position so that it will stare at that point
void	update(java.awt.Graphics g) PRE: A valid Graphics object POST: Paint all the objects

Methods inherited from class java.applet.Applet

getAccessibleContext, getAppletContext, getAppletInfo, getAudioClip, getAudioClip, getCodeBase, getDocumentBase, getImage, getImage, getLocale, getParameter, getParameterInfo, isActive, newAudioClip, play, play, resize, resize, setStub, showStatus, start, stop

Methods inherited from class java.awt.Panel

, addNotify, constructComponentName

Methods inherited from class java.awt.Container

add, add, add, add, add, addContainerListener, addImpl, adjustListeningChildren, applyOrientation, checkGD, countComponents, createChildHierarchyEvents, createHierarchyEvents, deliverEvent, dispatchEventImpl, dispatchEventToSelf, doLayout, eventEnabled, findComponentAt, findComponentAt, findComponentAt, getAccessibleAt, getAccessibleChild, getAccessibleChildrenCount, getAlignmentX, getAlignmentY, getComponent, getComponentAt, getComponentAt, getComponentCount, getComponents_NoClientCode, getComponents, getInsets, getLayout, getListeners, getMaximumSize, getMinimumSize, getMouseEventTarget, getPreferredSize, getWindow, initIDs, insets, invalidate, invalidateTree, isAncestorOf, layout, lightweightPaint, lightweightPrint, list, list, locate, minimumSize, nextFocus, numListening, paintComponents, paintHeavyweightComponents, paramString, postProcessKeyEvent, postsOldMouseEvents, preferredSize, preProcessKeyEvent, print, printComponents, printHeavyweightComponents, processContainerEvent, processEvent, proxyEnableEvents, proxyRequestFocus, readObject, remove, remove, removeAll, removeContainerListener, removeNotify, setFocusOwner, setFont, setLayout, transferFocus, validate, validateTree, writeObject

Methods inherited from class java.awt.Component

action, add, addComponentListener, addFocusListener, addHierarchyBoundsListener, addHierarchyListener, addInputMethodListener, addKeyListener, addMouseListener, addMouseMotionListener, addPropertyChangeListener, addPropertyChangeListener, areInputMethodsEnabled, bounds, checkImage, checkImage, checkWindowClosingException, coalesceEvents, contains, contains, createImage, createImage, disable, disableEvents, dispatchEvent, enable, enable, enableEvents, enableInputMethods, firePropertyChange, getAccessibleIndexInParent, getAccessibleStateSet, getBackground, getBounds, getBounds, getColorModel, getComponentOrientation, getCursor, getDropTarget, getFont_NoClientCode, getFont, getFontMetrics, getForeground, getGraphics, getGraphicsConfiguration, getHeight, getInputContext, getInputMethodRequests, getLocation, getLocation, getLocationOnScreen_NoTreeLock, getLocationOnScreen, getName, getNativeContainer, getParent_NoClientCode, getParent, getPeer, getSize, getSize, getToolkit, getToolkitImpl, getTreeLock, getWidth, getWindowForObject, getX, getY, gotFocus, handleEvent, hasFocus, hide, imageUpdate, inside, isDisplayable, isDoubleBuffered, isEnabled, isEnabledImpl, isFocusTraversable, isLightweight, isOpaque, isRecursivelyVisible, isShowing, isValid, isVisible, keyDown, keyUp, list, list, list, location, lostFocus, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paintAll, postEvent, prepareImage, prepareImage, printAll, processComponentEvent, processFocusEvent, processHierarchyBoundsEvent, processHierarchyEvent, processInputMethodEvent, processKeyEvent, processMouseEvent, processMouseMotionEvent, remove, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removePropertyChangeListener, removePropertyChangeListener, repaint, repaint, repaint, repaint, requestFocus, resetGC, reshape, setBackground, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setEnabled, setForeground, setLocale, setLocation, setLocation, setName, setSize, setSize, setVisible, show, show, size, toString, transferFocus

Methods inherited from class java.lang.Object

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

Field Detail

frogImage

private java.awt.Image frogImage

Frog image (still)

frogEatImage

private java.awt.Image frogEatImage

Frog image (eating)

flyImage

private java.awt.Image flyImage

Fly image

refreshRate

private long refreshRate

rehresh rate in millisecond

animation

private java.lang.Thread animation

Thread for animation

fm

private FlyManager fm

FlyManager for eating fly

fc

private FlyCreator fc

FlyCreator for creating fly

width

private int width

Display Width of the applet

height

private int height

Display Height of the applet

frogHeight

private int frogHeight

Height of the frog image in pixel

frogWidth

private int frogWidth

Width of the frog image in pixel

frogY_pos

private int frogY_pos

position of the frog image

eye_y

private int eye_y

position of the frog's eye (y)

eye_x

private int eye_x

position of the frog's eye (x)

eyeCenterX

private int eyeCenterX

position of the center of frog's eye (x)

eyeCenterY

private int eyeCenterY

position of the center of frog's eye (y)

eyeSize

private int eyeSize

size of the frog's eye

eyeXOffset

private int eyeXOffset

x offset for drawing the frog's eye

eyeYOffset

private int eyeYOffset

y offset for drawing the frog's eye

drawTongue

private int drawTongue

delay for drawing the tongue

tongue_y

private int tongue_y

destination of the tongue (y)

tongue_x

private int tongue_x

destination of the tongue (x)

mouth_x

private int mouth_x

position of the mouth(x)

mouth_y

private int mouth_y

position of the mouth(y)

eyeEmotion

private int eyeEmotion

For displaying eye emotion, happy, sad, netural

backBufferImage

private java.awt.Image backBufferImage

Back Image buffer for drawing

backBufferGraphics

private java.awt.Graphics backBufferGraphics

Graphic context associate with the back image buffer

Constructor Detail

MainApplet

public MainApplet()

Method Detail

init

public void init()

PRE: NONE
POST: Initialize all variables and start all the threads

Overrides:

init in class java.applet.Applet

paint

public void paint(java.awt.Graphics g)

PRE: A valid Graphics object
POST: Paint all the objects

Overrides:

paint in class java.awt.Container

update

public void update(java.awt.Graphics g)

PRE: A valid Graphics object
POST: Paint all the objects

Overrides:

update in class java.awt.Container

drawFrog

private void drawFrog(java.awt.Graphics g)

PRE: A valid Graphics object
POST: Draw the frog onto the Graphics object

run

public void run()

PRE: NONE
POST: Refresh the screen in a timely manner and move the flies too

Specified by:

run in interface java.lang.Runnable

setEyePos

public void setEyePos(int x,
                      int y)

PRE: NONE
POST: set the eye position so that it will stare at that point

destroy

public void destroy()

PRE: NONE
POST: Clean up the thread

Overrides:

destroy in class java.applet.Applet

mouseExited

public void mouseExited(java.awt.event.MouseEvent e)

PRE: A valid MouseEvent object
POST: set the eye position to center

Specified by:

mouseExited in interface java.awt.event.MouseListener

mouseEntered

public void mouseEntered(java.awt.event.MouseEvent e)

PRE: A valid MouseEvent object
POST: Nothing. Require for the MouseMotionListener Interface

Specified by:

mouseEntered in interface java.awt.event.MouseListener

mouseMoved

public void mouseMoved(java.awt.event.MouseEvent e)

PRE: A valid MouseEvent object
POST: Set eye position according to the mouse movement

Specified by:

mouseMoved in interface java.awt.event.MouseMotionListener

mouseDragged

public void mouseDragged(java.awt.event.MouseEvent e)

PRE: A valid MouseEvent object
POST: Nothing. Require for the MouseMotionListener Interface

Specified by:

mouseDragged in interface java.awt.event.MouseMotionListener

mouseReleased

public void mouseReleased(java.awt.event.MouseEvent e)

PRE: A valid MouseEvent object
POST: Nothing. Require for the MouseListener Interface

Specified by:

mouseReleased in interface java.awt.event.MouseListener

mousePressed

public void mousePressed(java.awt.event.MouseEvent e)

PRE: A valid MouseEvent object
POST: try to eat the fly and set the animations

Specified by:

mousePressed in interface java.awt.event.MouseListener

mouseClicked

public void mouseClicked(java.awt.event.MouseEvent e)

PRE: A valid MouseEvent object
POST: Nothing. Require for the MouseListener Interface

Specified by:

mouseClicked in interface java.awt.event.MouseListener