tic-tac-toe.js Example File
declarative/toys/tic-tac-toe/qml/tic-tac-toe/content/tic-tac-toe.jsfunction winner(board) { for (var i=0; i<3; ++i) { if (board.children[i].state != "" && board.children[i].state == board.children[i+3].state && board.children[i].state == board.children[i+6].state) return true if (board.children[i*3].state != "" && board.children[i*3].state == board.children[i*3+1].state && board.children[i*3].state == board.children[i*3+2].state) return true } if (board.children[0].state != "" && board.children[0].state == board.children[4].state != "" && board.children[0].state == board.children[8].state != "") return true if (board.children[2].state != "" && board.children[2].state == board.children[4].state != "" && board.children[2].state == board.children[6].state != "") return true return false } function restartGame() { game.running = true for (var i=0; i<9; ++i) board.children[i].state = "" } function makeMove(pos, player) { board.children[pos].state = player if (winner(board)) { gameFinished(player + " wins") return true } else { return false } } function canPlayAtPos(pos) { return board.children[pos].state == "" } function computerTurn() { var r = Math.random(); if (r < game.difficulty) smartAI(); else randomAI(); } function smartAI() { function boardCopy(a) { var ret = new Object; ret.children = new Array(9); for (var i = 0; i<9; i++) { ret.children[i] = new Object; ret.children[i].state = a.children[i].state; } return ret; } for (var i=0; i<9; i++) { var simpleBoard = boardCopy(board); if (canPlayAtPos(i)) { simpleBoard.children[i].state = "O"; if (winner(simpleBoard)) { makeMove(i, "O") return } } } for (var i=0; i<9; i++) { var simpleBoard = boardCopy(board); if (canPlayAtPos(i)) { simpleBoard.children[i].state = "X"; if (winner(simpleBoard)) { makeMove(i, "O") return } } } function thwart(a,b,c) { //If they are at a, try b or c if (board.children[a].state == "X") { if (canPlayAtPos(b)) { makeMove(b, "O") return true } else if (canPlayAtPos(c)) { makeMove(c, "O") return true } } return false; } if (thwart(4,0,2)) return; if (thwart(0,4,3)) return; if (thwart(2,4,1)) return; if (thwart(6,4,7)) return; if (thwart(8,4,5)) return; if (thwart(1,4,2)) return; if (thwart(3,4,0)) return; if (thwart(5,4,8)) return; if (thwart(7,4,6)) return; for (var i =0; i<9; i++) { if (canPlayAtPos(i)) { makeMove(i, "O") return } } restartGame(); } function randomAI() { var unfilledPosns = new Array(); for (var i=0; i<9; ++i) { if (canPlayAtPos(i)) unfilledPosns.push(i); } if (unfilledPosns.length == 0) { restartGame(); } else { var choice = unfilledPosns[Math.floor(Math.random() * unfilledPosns.length)]; makeMove(choice, "O"); } } function gameFinished(message) { messageDisplay.text = message messageDisplay.visible = true game.running = false }
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