logic
Class GameEngine

java.lang.Object
  java.awt.Component
      java.awt.Container
          javax.swing.JComponent
              javax.swing.JPanel
                  logic.GameEngine

All Implemented Interfaces:

java.awt.image.ImageObserver, java.awt.MenuContainer, java.io.Serializable, javax.accessibility.Accessible

public class GameEngine
extends javax.swing.JPanel

Author:

See Also:

Serialized Form

Nested Class Summary

private class

GameEngine.KeyInputHandler This class manages our key input processes.

Nested classes/interfaces inherited from class javax.swing.JPanel

javax.swing.JPanel.AccessibleJPanel

Nested classes/interfaces inherited from class javax.swing.JComponent

javax.swing.JComponent.AccessibleJComponent

Nested classes/interfaces inherited from class java.awt.Container

java.awt.Container.AccessibleAWTContainer

Nested classes/interfaces inherited from class java.awt.Component

java.awt.Component.AccessibleAWTComponent, java.awt.Component.BaselineResizeBehavior, java.awt.Component.BltBufferStrategy, java.awt.Component.FlipBufferStrategy

Field Summary

private Sprite	background Our game screen background.
private int	balloonCount This integer holds the number of the valus on the screen to determine if if the level was cleared or not.
private static java.lang.String	balloonPath
private javax.swing.JPanel	cardPanel
private static boolean	debug This boolean is for testing the GameEngine.
private java.util.ArrayList	entities This arraylist holds all the entities on the screen to check collisions and make drawing works easier, withouth checking too many types.
private boolean	gameRunning True if the game is currently "running", i.e. the game loop is looping
private boolean	isMainMenu This variable is for determining if the game is on main menu Because game will be paused and it will be prevented from rendering again and again.
private java.awt.CardLayout	layout We need an instance of the layout when we lost our focus on the game screen
private int	level This integer holds the level number.
private MainPanel	mainPanel
private java.lang.String	message The message to display which waiting for a key press
private java.lang.String	message2 The message to display which waiting for a key press
private boolean	multiplayer This boolean let us know if the game is initialized as multiplayer.
private static java.lang.String	obstaclePath
private boolean	pause True if the game is currently "paused"
private Player	playerOne This is one of the mosp important game objects: Player One.
private static java.lang.String	playerPath And finally to prevent to write paths for images every time we declare them here to make the future changes and coding below easier.
private static java.lang.String	playerPath2
private Player	playerTwo Player Two is created on only multiplayer games.
private java.util.ArrayList	removeList This arraylist holds the objects to be removed at the end of each game loop
private int	rounded For the widh of the rounded rectangle to be drawn before the screen text
private SaveManager	save Our Save manager
private HighScoreManager	score Our HighScore manager
private ScreenManager	sm Our Screen manager.
private SoundManager	sound Our Sound manager
private boolean	timeStop
private long	timeStopTime
private boolean	waitingForKeyPressed On rare occasions, our game will stop for user to press any key on keyboard to continue to prevent any unexpected occurrences.

Fields inherited from class javax.swing.JComponent

accessibleContext, listenerList, TOOL_TIP_TEXT_KEY, ui, UNDEFINED_CONDITION, WHEN_ANCESTOR_OF_FOCUSED_COMPONENT, WHEN_FOCUSED, WHEN_IN_FOCUSED_WINDOW

Fields inherited from class java.awt.Component

BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENT

Fields inherited from interface java.awt.image.ImageObserver

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

Constructor Summary

GameEngine(ScreenManager sm, SaveManager save, SoundManager sound, HighScoreManager score, javax.swing.JPanel cardPanel, java.awt.CardLayout layout, MainPanel mainPanel, boolean multiplayer, int level)
Here our constructor, GameEngine is being initialized.

Method Summary

void	addBalloon() Since one level's state depends on number of balloons every time we add a new balloon, we need to hold the exact number of balloons in the list.
void	addEntity(GameEntity entity) In this method we add new entity (like bonus or sting) to our GameEntity list.
void	checkCollisions() This method doesn't actually check collisions, but instead calls entities to check their own collisions.
void	debug()
void	deleteBalloon() Same thing as addballoon method applies here but in reverse order.
void	draw(java.awt.Graphics2D g) It's pretty much obvious, this method draws every object in the list.
void	initialize(int level, boolean multiplayer) This method initializes our game for every level.
void	mainMenu(boolean isMainMenu) This method switches between main menu and our game.
void	mainMenuDeath()
void	moveEntities(long delta) This method moves all the entities in the list.
void	notifyDeath() This method decides if the game is over or not.
void	notifyLevelEnd() When a level finished we need a player input to begin the new level.
void	pause(boolean pause) This method pauses and unpauses the game.
void	removeEntity(GameEntity entity) This method removes a certain entity from the list.
void	setTimeStop(boolean timeStop) This method manages the Freezer bonus as all entities on the screen except player is to be frozen.
void	startGame() This method creates a new thread for game to start.

Methods inherited from class javax.swing.JPanel

getAccessibleContext, getUI, getUIClassID, paramString, setUI, updateUI

Methods inherited from class javax.swing.JComponent

addAncestorListener, addNotify, addVetoableChangeListener, computeVisibleRect, contains, createToolTip, disable, enable, firePropertyChange, firePropertyChange, firePropertyChange, fireVetoableChange, getActionForKeyStroke, getActionMap, getAlignmentX, getAlignmentY, getAncestorListeners, getAutoscrolls, getBaseline, getBaselineResizeBehavior, getBorder, getBounds, getClientProperty, getComponentGraphics, getComponentPopupMenu, getConditionForKeyStroke, getDebugGraphicsOptions, getDefaultLocale, getFontMetrics, getGraphics, getHeight, getInheritsPopupMenu, getInputMap, getInputMap, getInputVerifier, getInsets, getInsets, getListeners, getLocation, getMaximumSize, getMinimumSize, getNextFocusableComponent, getPopupLocation, getPreferredSize, getRegisteredKeyStrokes, getRootPane, getSize, getToolTipLocation, getToolTipText, getToolTipText, getTopLevelAncestor, getTransferHandler, getVerifyInputWhenFocusTarget, getVetoableChangeListeners, getVisibleRect, getWidth, getX, getY, grabFocus, isDoubleBuffered, isLightweightComponent, isManagingFocus, isOpaque, isOptimizedDrawingEnabled, isPaintingForPrint, isPaintingTile, isRequestFocusEnabled, isValidateRoot, paint, paintBorder, paintChildren, paintComponent, paintImmediately, paintImmediately, print, printAll, printBorder, printChildren, printComponent, processComponentKeyEvent, processKeyBinding, processKeyEvent, processMouseEvent, processMouseMotionEvent, putClientProperty, registerKeyboardAction, registerKeyboardAction, removeAncestorListener, removeNotify, removeVetoableChangeListener, repaint, repaint, requestDefaultFocus, requestFocus, requestFocus, requestFocusInWindow, requestFocusInWindow, resetKeyboardActions, reshape, revalidate, scrollRectToVisible, setActionMap, setAlignmentX, setAlignmentY, setAutoscrolls, setBackground, setBorder, setComponentPopupMenu, setDebugGraphicsOptions, setDefaultLocale, setDoubleBuffered, setEnabled, setFocusTraversalKeys, setFont, setForeground, setInheritsPopupMenu, setInputMap, setInputVerifier, setMaximumSize, setMinimumSize, setNextFocusableComponent, setOpaque, setPreferredSize, setRequestFocusEnabled, setToolTipText, setTransferHandler, setUI, setVerifyInputWhenFocusTarget, setVisible, unregisterKeyboardAction, update

Methods inherited from class java.awt.Container

add, add, add, add, add, addContainerListener, addImpl, addPropertyChangeListener, addPropertyChangeListener, applyComponentOrientation, areFocusTraversalKeysSet, countComponents, deliverEvent, doLayout, findComponentAt, findComponentAt, getComponent, getComponentAt, getComponentAt, getComponentCount, getComponents, getComponentZOrder, getContainerListeners, getFocusTraversalKeys, getFocusTraversalPolicy, getLayout, getMousePosition, insets, invalidate, isAncestorOf, isFocusCycleRoot, isFocusCycleRoot, isFocusTraversalPolicyProvider, isFocusTraversalPolicySet, layout, list, list, locate, minimumSize, paintComponents, preferredSize, printComponents, processContainerEvent, processEvent, remove, remove, removeAll, removeContainerListener, setComponentZOrder, setFocusCycleRoot, setFocusTraversalPolicy, setFocusTraversalPolicyProvider, setLayout, transferFocusBackward, transferFocusDownCycle, validate, validateTree

Methods inherited from class java.awt.Component

action, add, addComponentListener, addFocusListener, addHierarchyBoundsListener, addHierarchyListener, addInputMethodListener, addKeyListener, addMouseListener, addMouseMotionListener, addMouseWheelListener, bounds, checkImage, checkImage, coalesceEvents, contains, createImage, createImage, createVolatileImage, createVolatileImage, disableEvents, dispatchEvent, enable, enableEvents, enableInputMethods, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, getBackground, getBounds, getColorModel, getComponentListeners, getComponentOrientation, getCursor, getDropTarget, getFocusCycleRootAncestor, getFocusListeners, getFocusTraversalKeysEnabled, getFont, getForeground, getGraphicsConfiguration, getHierarchyBoundsListeners, getHierarchyListeners, getIgnoreRepaint, getInputContext, getInputMethodListeners, getInputMethodRequests, getKeyListeners, getLocale, getLocation, getLocationOnScreen, getMouseListeners, getMouseMotionListeners, getMousePosition, getMouseWheelListeners, getName, getParent, getPeer, getPropertyChangeListeners, getPropertyChangeListeners, getSize, getToolkit, getTreeLock, gotFocus, handleEvent, hasFocus, hide, imageUpdate, inside, isBackgroundSet, isCursorSet, isDisplayable, isEnabled, isFocusable, isFocusOwner, isFocusTraversable, isFontSet, isForegroundSet, isLightweight, isMaximumSizeSet, isMinimumSizeSet, isPreferredSizeSet, isShowing, isValid, isVisible, keyDown, keyUp, list, list, list, location, lostFocus, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paintAll, postEvent, prepareImage, prepareImage, processComponentEvent, processFocusEvent, processHierarchyBoundsEvent, processHierarchyEvent, processInputMethodEvent, processMouseWheelEvent, remove, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removeMouseWheelListener, removePropertyChangeListener, removePropertyChangeListener, repaint, repaint, repaint, resize, resize, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setFocusable, setFocusTraversalKeysEnabled, setIgnoreRepaint, setLocale, setLocation, setLocation, setName, setSize, setSize, show, show, size, toString, transferFocus, transferFocusUpCycle

Methods inherited from class java.lang.Object

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

Field Detail

debug

private static final boolean debug

This boolean is for testing the GameEngine. Do not change this value to true!

See Also:

Constant Field Values

sm

private ScreenManager sm

Our Screen manager. This variable will be delivered by presentation tier by reference

sound

private SoundManager sound

Our Sound manager

score

private HighScoreManager score

Our HighScore manager

save

private SaveManager save

Our Save manager

layout

private java.awt.CardLayout layout

We need an instance of the layout when we lost our focus on the game screen

cardPanel

private javax.swing.JPanel cardPanel

mainPanel

private MainPanel mainPanel

gameRunning

private boolean gameRunning

True if the game is currently "running", i.e. the game loop is looping

pause

private boolean pause

True if the game is currently "paused"

message

private java.lang.String message

The message to display which waiting for a key press

message2

private java.lang.String message2

The message to display which waiting for a key press

level

private int level

This integer holds the level number. Default value is 1

multiplayer

private boolean multiplayer

This boolean let us know if the game is initialized as multiplayer. Default value is false

waitingForKeyPressed

private boolean waitingForKeyPressed

On rare occasions, our game will stop for user to press any key on keyboard to continue to prevent any unexpected occurrences.

isMainMenu

private boolean isMainMenu

This variable is for determining if the game is on main menu Because game will be paused and it will be prevented from rendering again and again.

rounded

private int rounded

For the widh of the rounded rectangle to be drawn before the screen text

balloonCount

private int balloonCount

This integer holds the number of the valus on the screen to determine if if the level was cleared or not.

timeStop

private boolean timeStop

timeStopTime

private long timeStopTime

entities

private java.util.ArrayList entities

This arraylist holds all the entities on the screen to check collisions and make drawing works easier, withouth checking too many types. In the end, everything on the screen is a GameEntity object.

removeList

private java.util.ArrayList removeList

This arraylist holds the objects to be removed at the end of each game loop

playerOne

private Player playerOne

This is one of the mosp important game objects: Player One. It is created for both single and multiplayer games.

playerTwo

private Player playerTwo

Player Two is created on only multiplayer games. Multiplayer game is decided by the boolean variable @multiplayer

background

private Sprite background

Our game screen background. Just to deliver a better experience. It is a Sprite.

playerPath

private static final java.lang.String playerPath

And finally to prevent to write paths for images every time we declare them here to make the future changes and coding below easier.

See Also:

Constant Field Values

playerPath2

private static final java.lang.String playerPath2

See Also:

Constant Field Values

balloonPath

private static final java.lang.String balloonPath

See Also:

Constant Field Values

obstaclePath

private static final java.lang.String obstaclePath

See Also:

Constant Field Values

Constructor Detail

GameEngine

public GameEngine(ScreenManager sm,
                  SaveManager save,
                  SoundManager sound,
                  HighScoreManager score,
                  javax.swing.JPanel cardPanel,
                  java.awt.CardLayout layout,
                  MainPanel mainPanel,
                  boolean multiplayer,
                  int level)

Here our constructor, GameEngine is being initialized. Our GameEngine is a JPanel to be shuffled in CardLayout system.

Parameters:

sm - ScreenManager object

cardPanel - cardPanel to switch between menu and game

layout - layout to choose between menu and game

multiplayer - to set the game to be initialized to be multiplayer or not

mainPanel - to set menu options like continue button

Method Detail

initialize

public void initialize(int level,
                       boolean multiplayer)

This method initializes our game for every level. It takes two parameters, as level and multiplayer.

Parameters:

level - This parameter helps us to initialize a certain level.

multiplayer - This parameter helps us to initialize second character if our game is multiplayer

addEntity

public void addEntity(GameEntity entity)

In this method we add new entity (like bonus or sting) to our GameEntity list.

Parameters:

entity - is the new entity to be added.

removeEntity

public void removeEntity(GameEntity entity)

This method removes a certain entity from the list. Specifically, it destroys entities once their job is done; but also can prevent ceased player to be drawn on the screen.

Parameters:

entity -

notifyDeath

public void notifyDeath()

This method decides if the game is over or not. It is called from Player class so that player object decides game's state.

notifyLevelEnd

public void notifyLevelEnd()

When a level finished we need a player input to begin the new level.

draw

public void draw(java.awt.Graphics2D g)

It's pretty much obvious, this method draws every object in the list. On some special occasions, this method may alter the transparency and it also draws the stats like scores and level.

Parameters:

g - This parameter is coming from ScreenManager as it is Double Buffered and produces a Graphics2D object.

moveEntities

public void moveEntities(long delta)

This method moves all the entities in the list. Of course, it only calls entities' move method.

Parameters:

delta - This parameter is send to entities to determine how much they will move.

checkCollisions

public void checkCollisions()

This method doesn't actually check collisions, but instead calls entities to check their own collisions. Every game entity is responsible from its own collision and after collision message.

startGame

public void startGame()

This method creates a new thread for game to start. This is the entry point of our actual game, and gameloop takes place here. It's basically a new Runnable and when the level is chosen from game panel, it initializes and starts the game.

pause

public void pause(boolean pause)

This method pauses and unpauses the game. Simply, when specific button is pressed, this method is callsed.

Parameters:

pause - Is game paused?

mainMenu

public void mainMenu(boolean isMainMenu)

This method switches between main menu and our game.

Parameters:

isMainMenu - are we in main menu or game.

mainMenuDeath

public void mainMenuDeath()

debug

public void debug()

addBalloon

public void addBalloon()

Since one level's state depends on number of balloons every time we add a new balloon, we need to hold the exact number of balloons in the list.

deleteBalloon

public void deleteBalloon()

Same thing as addballoon method applies here but in reverse order. However, a new level initialization signal takes here as when the number of balloons are 0, level is finished.

setTimeStop

public void setTimeStop(boolean timeStop)

This method manages the Freezer bonus as all entities on the screen except player is to be frozen.

Parameters:

timeStop - if bonus is taken.