wyvern.lib.classes.games
Class Checkers

java.lang.Object
  wyvern.kernel.properties.PList
      wyvern.kernel.maps.MapObject
          wyvern.lib.classes.games.Checkers

All Implemented Interfaces:

Broadcaster, GameObject, MethodHookable, MouseInterest, PropertyList

public class Checkers

extends MapObject

implements MouseInterest

This class implements a 2-player checkers game with human-sized pieces. When placed in a map at location (x,y), it treats (x,y) as its upper-left corner, creates an 8x8 checkerboard, and populates it with pieces. It also creates 2 "thrones" for players to sit in and begin a game.

Version:

1.0, Sep 21, 1998

Author:

Steve Yegge

Field Summary

static int	KING
static int	PIECE
static java.lang.String[]	titles

Fields inherited from class wyvern.kernel.maps.MapObject

IN_MAP_EDITOR, listenerList_

Fields inherited from class wyvern.kernel.properties.PList

readOnly_

Fields inherited from interface wyvern.lib.PropertyList

PROPERTY_PACKAGE

Constructor Summary

Checkers()

Method Summary

Point	boardToMap(int x, int y) Returns a point in board coordinates.
Point	boardToMap(Point p) Returns a point in board coordinates.
void	checkKing(Commandable agent, wyvern.lib.classes.games.Checkers.Piece p) Possibly turns a piece into a King after a move.
boolean	doMove(Commandable agent, Point dest) Attempts the move.
Rectangle	getBounds() Returns the bounds of the board object.
int[]	getImageDescriptors() Returns the board's appearance.
wyvern.lib.classes.games.Checkers.Piece	getPiece(int x, int y) Returns the checkers piece at the specified board location.
wyvern.lib.classes.games.Checkers.Piece	getPiece(Point loc) Returns the checkers piece at the specified map location.
int	getTile(int xloc, int yloc) Overrides MapObject.getTile().
void	handleMouse(Commandable agent, Point click) Moves a piece.
void	initialize() Adds checkers-specific properties.
void	initPieces() Creates all the pieces and sets them in their starting places.
boolean	isEmpty(int x, int y) Returns true if the specified board location is empty.
boolean	isEmpty(Point p) Returns true if the specified board location is empty.
Point	mapToBoard(int x, int y) Returns a point in board coordinates.
Point	mapToBoard(Point p) Returns a point in board coordinates.
void	mouseClicked(MouseCommandEvent event) Handles a mouse-click.
void	restart() Clears the current game and starts over.
void	setMap(GameMap map, int x, int y) Sets the checkers board in the map.
void	trySelection(Commandable agent, Point click) Attempts to select a game piece for moving.

Methods inherited from class wyvern.kernel.maps.MapObject

addContainerChangeListener, addDefaultProperty, addMapChangeListener, addMapMotionListener, addMethodHook, addMotionTracker, addObjectTracker, addPrefix, addSuffix, addToMap, bless, broadcast, broadcast, broadcast, broadcast, broadcast, canEnter, canEnterBlockedBy, canMove, canMove, canMoveBlockedBy, canMoveBlockedBy, canMoveTo, canMoveToBlockedBy, checkDrop, curse, cycleFrame, destroy, ensureListenerList, ensureWeight, externalize, fireContainerEntered, fireContainerExited, fireEnteredMap, fireExitedMap, fireMovedInMap, getAlpha, getAppearance, getArchetype, getBaseName, getBaseWeight, getBitmap, getCanonicalClassName, getCategory, getContainer, getCreator, getDamagedDescription, getDescription, getDirection, getGenderPossessive, getGenderPronoun, getImage, getImageDescriptor, getLayer, getLocations, getMap, getMapLink, getMaterial, getMaterialDescription, getMover, getOwningPlayer, getParentMap, getPrefixes, getQuantity, getReferenceLoc, getRelativeLocs, getShortDesc, getSuffixes, getTile, getValue, getWeight, groupString, inContainer, initLocs, inMapEditor, invalidate, invalidateImage, invalidateParent, invalidateText, isAnimated, isAttackable, isBlessed, isCommandable, isCursed, isDamned, isGroupable, isIdentified, isMonster, isMonsterOrPlayer, isPlayer, isTerrain, isUncursed, isUnpaid, isWizard, makeClone, markPaid, markUnpaid, move, occupies, positionAt, positionAtMap, remove, removeContainerChangeListener, removeFromMap, removeMapChangeListener, removeMapMotionListener, removeMethodHook, removeMotionTracker, removeObjectTracker, removePrefix, removeSuffix, runMethodHook, setAlpha, setAnimated, setBitmap, setCategory, setContainer, setDefaultBitmap, setDefaultCategory, setDefaultDesc, setDefaultImage, setDefaultIntProperty, setDefaultLayer, setDefaultMaterial, setDefaultProperty, setDefaultShortDesc, setDirection, setImage, setImage, setLayer, setLocations, setMapLink, setQuantity, setShape, setSize, setTransientSize, setWeight, setWeight, teleport, toString, updateMapLocation

Methods inherited from class wyvern.kernel.properties.PList

addProperty, addTransientProperty, adjustDoubleProperty, adjustIntProperty, adjustLongProperty, adjustTransientDoubleProperty, adjustTransientIntProperty, adjustTransientLongProperty, countLocalProperties, debugProperties, dismantlePropertyList, getDoubleProperty, getInheritedProperty, getInteger, getIntProperty, getLocalProperties, getLocalProperty, getLongProperty, getParent, getPersistentDoubleProperty, getPersistentIntProperty, getPersistentLocalProperties, getPersistentLongProperty, getPersistentProperty, getProfilingInfo, getProperties, getProperties, getPropertiesIncludingTransients, getPropertiesIncludingTransients, getProperty, getSerializableProperties, getSerializableProperty, getStringProperty, getTransientDoubleProperty, getTransientIntProperty, getTransientLongProperty, getTransientProperties, getTransientProperty, hasLocalProperty, hasPersistentProperty, hasProperty, hasTransientProperty, inheritProperty, isReadOnly, isRemoved, isTransientlyRemoved, printLocalProperties, printProperties, printProperties, printTransientProperties, removeProperty, removeTransientProperty, setDoubleProperty, setIntProperty, setLongProperty, setParent, setProperty, setReadOnly, setTransientDoubleProperty, setTransientIntProperty, setTransientLongProperty, setTransientProperty, toString, transientlyRemoveProperty

Methods inherited from class java.lang.Object

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

Methods inherited from interface wyvern.lib.PropertyList

addProperty, addTransientProperty, adjustDoubleProperty, adjustIntProperty, adjustLongProperty, adjustTransientDoubleProperty, adjustTransientIntProperty, adjustTransientLongProperty, countLocalProperties, getDoubleProperty, getInheritedProperty, getIntProperty, getLocalProperties, getLocalProperty, getLongProperty, getParent, getPersistentDoubleProperty, getPersistentIntProperty, getPersistentLocalProperties, getPersistentLongProperty, getPersistentProperty, getProperties, getProperties, getPropertiesIncludingTransients, getPropertiesIncludingTransients, getProperty, getSerializableProperties, getSerializableProperty, getStringProperty, getTransientDoubleProperty, getTransientIntProperty, getTransientLongProperty, getTransientProperties, getTransientProperty, hasLocalProperty, hasPersistentProperty, hasProperty, hasTransientProperty, inheritProperty, isReadOnly, isRemoved, isTransientlyRemoved, printLocalProperties, printProperties, printProperties, printTransientProperties, removeProperty, removeTransientProperty, setDoubleProperty, setIntProperty, setLongProperty, setParent, setProperty, setReadOnly, setTransientDoubleProperty, setTransientIntProperty, setTransientLongProperty, setTransientProperty, toString, transientlyRemoveProperty

Field Detail

PIECE

public static final int PIECE

See Also:

Constant Field Values

KING

public static final int KING

See Also:

Constant Field Values

titles

public static final java.lang.String[] titles

Constructor Detail

Checkers

public Checkers()

Method Detail

initialize

public void initialize()

Adds checkers-specific properties.

Specified by:

initialize in interface GameObject

Overrides:

initialize in class MapObject

setMap

public void setMap(GameMap map,
                   int x,
                   int y)

Sets the checkers board in the map.

Specified by:

setMap in interface GameObject

Overrides:

setMap in class MapObject

getImageDescriptors

public int[] getImageDescriptors()

Returns the board's appearance.

Specified by:

getImageDescriptors in interface GameObject

Overrides:

getImageDescriptors in class MapObject

Returns:

an int array of (x, y, database bitmap number) triples.

getTile

public int getTile(int xloc,
                   int yloc)

Overrides MapObject.getTile(). Required for all disjoint objects.

Specified by:

getTile in interface GameObject

Overrides:

getTile in class MapObject

getBounds

public Rectangle getBounds()

Returns the bounds of the board object.

Specified by:

getBounds in interface GameObject

Overrides:

getBounds in class MapObject

initPieces

public void initPieces()

Creates all the pieces and sets them in their starting places.

mapToBoard

public Point mapToBoard(Point p)

Returns a point in board coordinates.

mapToBoard

public Point mapToBoard(int x,
                        int y)

Returns a point in board coordinates.

boardToMap

public Point boardToMap(int x,
                        int y)

Returns a point in board coordinates.

boardToMap

public Point boardToMap(Point p)

Returns a point in board coordinates.

mouseClicked

public void mouseClicked(MouseCommandEvent event)

Handles a mouse-click.

Specified by:

mouseClicked in interface MouseInterest

Parameters:

event - the mouse event

handleMouse

public void handleMouse(Commandable agent,
                        Point click)

Moves a piece.

Parameters:

agent - the player doing the move

click - the point where they clicked, in map coordinates

getPiece

public wyvern.lib.classes.games.Checkers.Piece getPiece(Point loc)

Returns the checkers piece at the specified map location.

Parameters:

loc - the board position (in MAP coordinates, not board coords)

Returns:

the piece there, or null if the position is unoccupied

getPiece

public wyvern.lib.classes.games.Checkers.Piece getPiece(int x,
                                                        int y)

Returns the checkers piece at the specified board location.

Parameters:

x - the board x position in BOARD coordinates

y - the board y position in BOARD coordinates

isEmpty

public boolean isEmpty(int x,
                       int y)

Returns true if the specified board location is empty.

Parameters:

x - the x position in BOARD coordinates, where the upper-left corner (black queen's rook) is (0, 0).

y - the y position in BOARD coordinates

isEmpty

public boolean isEmpty(Point p)

Returns true if the specified board location is empty.

Parameters:

p - the x,y position in BOARD coordinates, where the upper-left corner of the board is (0,0).

trySelection

public void trySelection(Commandable agent,
                         Point click)

Attempts to select a game piece for moving.

doMove

public boolean doMove(Commandable agent,
                      Point dest)

Attempts the move.

Parameters:

agent - the agent doing the move

dest - the proposed destination for the move, in map coords

Returns:

true if we can move there.

checkKing

public void checkKing(Commandable agent,
                      wyvern.lib.classes.games.Checkers.Piece p)

Possibly turns a piece into a King after a move.

Parameters:

agent - the player

p - the piece

restart

public void restart()

Clears the current game and starts over.