jens@0: /*  This code is based on Apple's "GeekGameBoard" sample code, version 1.0.
jens@0:     http://developer.apple.com/samplecode/GeekGameBoard/
jens@0:     Copyright © 2007 Apple Inc. Copyright © 2008 Jens Alfke. All Rights Reserved.
jens@0: 
jens@0:     Redistribution and use in source and binary forms, with or without modification, are permitted
jens@0:     provided that the following conditions are met:
jens@0: 
jens@0:     * Redistributions of source code must retain the above copyright notice, this list of conditions
jens@0:       and the following disclaimer.
jens@0:     * Redistributions in binary form must reproduce the above copyright notice, this list of
jens@0:       conditions and the following disclaimer in the documentation and/or other materials provided
jens@0:       with the distribution.
jens@0: 
jens@0:     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
jens@0:     IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND 
jens@0:     FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRI-
jens@0:     BUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
jens@0:     (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 
jens@0:     PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
jens@0:     CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 
jens@0:     THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
jens@0: */
jens@0: #import "TicTacToeGame.h"
jens@0: #import "Grid.h"
jens@0: #import "Dispenser.h"
jens@0: #import "Piece.h"
jens@0: #import "QuartzUtils.h"
jens@0: 
jens@0: 
jens@0: @implementation TicTacToeGame
jens@0: 
jens@7: - (Piece*) pieceForPlayer: (int)playerNumber
jens@0: {
jens@7:     Piece *p = [[Piece alloc] initWithImageNamed: (playerNumber ? @"O.tiff" :@"X.tiff")
jens@7:                                            scale: 80];
jens@0:     p.owner = [self.players objectAtIndex: playerNumber];
jens@7:     p.name = (playerNumber ?@"O" :@"X");
jens@7:     return [p autorelease];
jens@0: }
jens@0: 
jens@10: - (id) init
jens@0: {
jens@10:     self = [super init];
jens@0:     if (self != nil) {
jens@0:         [self setNumberOfPlayers: 2];
jens@0:     }
jens@0:     return self;
jens@0: }
jens@10:         
jens@10: - (void) setUpBoard
jens@10: {
jens@10:     // Create a 3x3 grid:
jens@16:     CGFloat center = floor(CGRectGetMidX(_table.bounds));
jens@10:     [_grid release];
jens@10:     _grid = [[RectGrid alloc] initWithRows: 3 columns: 3 frame: CGRectMake(center-150,0, 300,300)];
jens@10:     [_grid addAllCells];
jens@10:     _grid.allowsMoves = _grid.allowsCaptures = NO;
jens@10:     _grid.cellColor = CreateGray(1.0, 0.25);
jens@10:     _grid.lineColor = kTranslucentLightGrayColor;
jens@16:     [_table addSublayer: _grid];
jens@10: }
jens@0: 
jens@7: 
jens@7: - (NSString*) stateString
jens@7: {
jens@7:     unichar str[10];
jens@7:     for( int i=0; i<9; i++ ) {
jens@7:         NSString *ident = [_grid cellAtRow: i/3 column: i%3].bit.name;
jens@7:         if( ident==nil )
jens@7:             str[i] = '-';
jens@7:         else 
jens@7:             str[i] = [ident characterAtIndex: 0];
jens@7:     }
jens@7:     return [NSString stringWithCharacters: str length: 9];
jens@7: }
jens@7: 
jens@7: - (void) setStateString: (NSString*)stateString
jens@7: {
jens@7:     for( int i=0; i<9; i++ ) {
jens@10:         Piece *piece = nil;
jens@10:         if( i < stateString.length )
jens@10:             switch( [stateString characterAtIndex: i] ) {
jens@10:                 case 'X': case 'x': piece = [self pieceForPlayer: 0]; break;
jens@10:                 case 'O': case 'o': piece = [self pieceForPlayer: 1]; break;
jens@10:                 default:            break;
jens@10:             }
jens@7:         [_grid cellAtRow: i/3 column: i%3].bit = piece;
jens@7:     }
jens@7: }
jens@7: 
jens@7: 
jens@3: - (Bit*) bitToPlaceInHolder: (id<BitHolder>)holder
jens@3: {
jens@3:     if( holder.bit==nil && [holder isKindOfClass: [Square class]] )
snej@26:         return [self pieceForPlayer: self.currentPlayer.index];
jens@3:     else
jens@3:         return nil;
jens@3: }
jens@3: 
jens@7: 
jens@7: - (void) bit: (Bit*)bit movedFrom: (id<BitHolder>)src to: (id<BitHolder>)dst
jens@7: {
jens@7:     Square *square = (Square*)dst;
jens@7:     int squareIndex = 3*square.row + square.column;
jens@10:     [self.currentTurn addToMove: [NSString stringWithFormat: @"%@%i", bit.name, squareIndex]];
jens@7:     [super bit: bit movedFrom: src to: dst];
jens@7: }
jens@7: 
jens@0: static Player* ownerAt( Grid *grid, int index )
jens@0: {
jens@0:     return [grid cellAtRow: index/3 column: index%3].bit.owner;
jens@0: }
jens@0: 
jens@0: /** Should return the winning player, if the current position is a win. */
jens@0: - (Player*) checkForWinner
jens@0: {
jens@0:     static const int kWinningTriples[8][3] =  { {0,1,2}, {3,4,5}, {6,7,8},  // rows
jens@0:                                                 {0,3,6}, {1,4,7}, {2,5,8},  // cols
jens@0:                                                 {0,4,8}, {2,4,6} };         // diagonals
jens@0:     for( int i=0; i<8; i++ ) {
jens@0:         const int *triple = kWinningTriples[i];
jens@0:         Player *p = ownerAt(_grid,triple[0]);
jens@0:         if( p && p == ownerAt(_grid,triple[1]) && p == ownerAt(_grid,triple[2]) )
jens@0:             return p;
jens@0:     }
jens@0:     return nil;
jens@0: }
jens@0: 
jens@0: @end