tetrixboard.js Example File
script/tetrix/tetrixboard.js
function TetrixBoard(ui)
{
this.ui = ui;
this.isStarted = false;
this.isPaused = false;
this._board = new Array(TetrixBoard.BoardWidth * TetrixBoard.BoardHeight);
this.clearBoard();
this.curPiece = new TetrixPiece();
this.nextPiece = new TetrixPiece();
this.nextPiece.setRandomShape();
ui.timer.timeout.connect(this, this.onTimer);
ui.keyPressed.connect(this, this.onKeyPress);
ui.paintRequested.connect(this, this.onPaint);
ui.paintNextPieceRequested.connect(this, this.onPaintNextPiece);
}
TetrixBoard.BoardWidth = 10;
TetrixBoard.BoardHeight = 22;
TetrixBoard.prototype.start = function() {
if (this.isPaused)
return;
this.isStarted = true;
this.isWaitingAfterLine = false;
this.numLinesRemoved = 0;
this.numPiecesDropped = 0;
this.score = 0;
this.level = 1;
this.clearBoard();
this.ui.linesRemovedChanged(this.numLinesRemoved);
this.ui.scoreChanged(this.score);
this.ui.levelChanged(this.level);
this.newPiece();
this.ui.timer.start(this.timeoutTime());
}
TetrixBoard.prototype.pause = function() {
if (!this.isStarted)
return;
this.isPaused = !this.isPaused;
if (this.isPaused) {
this.ui.timer.stop();
} else {
this.ui.timer.start(this.timeoutTime());
}
this.ui.update();
}
TetrixBoard.prototype.getShapeAt = function(x, y) {
return this._board[(y * TetrixBoard.BoardWidth) + x];
}
TetrixBoard.prototype.setShapeAt = function(x, y, newShape) {
this._board[(y * TetrixBoard.BoardWidth) + x] = newShape;
}
TetrixBoard.prototype.clearBoard = function() {
for (var i = 0; i < TetrixBoard.BoardHeight * TetrixBoard.BoardWidth; ++i)
this._board[i] = TetrixShape.NoShape;
}
TetrixBoard.prototype.dropDown = function() {
var dropHeight = 0;
var newY = this.curY;
while (newY > 0) {
if (!this.tryMove(this.curPiece, this.curX, newY - 1))
break;
--newY;
++dropHeight;
}
this.pieceDropped(dropHeight);
}
TetrixBoard.prototype.oneLineDown = function() {
if (!this.tryMove(this.curPiece, this.curX, this.curY - 1))
this.pieceDropped(0);
}
TetrixBoard.prototype.pieceDropped = function(dropHeight) {
for (var i = 0; i < 4; ++i) {
var x = this.curX + this.curPiece.getX(i);
var y = this.curY - this.curPiece.getY(i);
this.setShapeAt(x, y, this.curPiece.shape);
}
++this.numPiecesDropped;
if ((this.numPiecesDropped % 25) == 0) {
++this.level;
this.ui.timer.start(this.timeoutTime());
this.ui.levelChanged(this.level);
}
this.score += dropHeight + 7;
this.ui.scoreChanged(this.score);
this.removeFullLines();
if (!this.isWaitingAfterLine)
this.newPiece();
}
TetrixBoard.prototype.removeFullLines = function() {
var numFullLines = 0;
for (var i = TetrixBoard.BoardHeight - 1; i >= 0; --i) {
var lineIsFull = true;
for (var j = 0; j < TetrixBoard.BoardWidth; ++j) {
if (this.getShapeAt(j, i) == TetrixShape.NoShape) {
lineIsFull = false;
break;
}
}
if (lineIsFull) {
++numFullLines;
for (var k = i; k < TetrixBoard.BoardHeight - 1; ++k) {
for (var j = 0; j < TetrixBoard.BoardWidth; ++j)
this.setShapeAt(j, k, this.getShapeAt(j, k + 1));
}
for (var j = 0; j < TetrixBoard.BoardWidth; ++j)
this.setShapeAt(j, TetrixBoard.BoardHeight - 1, TetrixShape.NoShape);
}
}
if (numFullLines > 0) {
this.numLinesRemoved += numFullLines;
this.score += 10 * numFullLines;
this.ui.linesRemovedChanged(this.numLinesRemoved);
this.ui.scoreChanged(this.score);
this.ui.timer.start(500);
this.isWaitingAfterLine = true;
this.curPiece.shape = TetrixShape.NoShape;
this.ui.update();
}
}
TetrixBoard.prototype.newPiece = function() {
this.curPiece = this.nextPiece;
this.nextPiece = new TetrixPiece();
this.nextPiece.setRandomShape();
this.ui.showNextPiece(this.nextPiece.maxX - this.nextPiece.minX + 1,
this.nextPiece.maxY - this.nextPiece.minY + 1);
this.curX = TetrixBoard.BoardWidth / 2 + 1;
this.curY = TetrixBoard.BoardHeight - 1 + this.curPiece.minY;
if (!this.tryMove(this.curPiece, this.curX, this.curY)) {
this.curPiece.shape = TetrixShape.NoShape;
this.ui.timer.stop();
this.isStarted = false;
}
}
TetrixBoard.prototype.tryMove = function(newPiece, newX, newY) {
for (var i = 0; i < 4; ++i) {
var x = newX + newPiece.getX(i);
var y = newY - newPiece.getY(i);
if ((x < 0) || (x >= TetrixBoard.BoardWidth) || (y < 0) || (y >= TetrixBoard.BoardHeight))
return false;
if (this.getShapeAt(x, y) != TetrixShape.NoShape)
return false;
}
this.curPiece = newPiece;
this.curX = newX;
this.curY = newY;
this.ui.update();
return true;
}
TetrixBoard.prototype.onPaint = function(painter) {
if (this.isPaused) {
this.ui.drawPauseScreen(painter);
return;
}
for (var i = 0; i < TetrixBoard.BoardHeight; ++i) {
for (var j = 0; j < TetrixBoard.BoardWidth; ++j) {
var shape = this.getShapeAt(j, TetrixBoard.BoardHeight - i - 1);
if (shape != TetrixShape.NoShape)
this.ui.drawSquare(painter, j, i, shape);
}
}
if (this.curPiece.shape != TetrixShape.NoShape) {
for (var i = 0; i < 4; ++i) {
var x = this.curX + this.curPiece.getX(i);
var y = this.curY - this.curPiece.getY(i);
this.ui.drawSquare(painter, x, TetrixBoard.BoardHeight - y - 1,
this.curPiece.shape);
}
}
}
TetrixBoard.prototype.onPaintNextPiece = function(painter) {
for (var i = 0; i < 4; ++i) {
var x = this.nextPiece.getX(i) - this.nextPiece.minX;
var y = this.nextPiece.getY(i) - this.nextPiece.minY;
this.ui.drawSquare(painter, x, y, this.nextPiece.shape);
}
}
TetrixBoard.prototype.onKeyPress = function(key) {
if (!this.isStarted || this.isPaused || (this.curPiece.shape == TetrixShape.NoShape))
return;
switch (key) {
case Qt.Key_Left:
this.tryMove(this.curPiece, this.curX - 1, this.curY);
break;
case Qt.Key_Right:
this.tryMove(this.curPiece, this.curX + 1, this.curY);
break;
case Qt.Key_Down:
this.tryMove(this.curPiece.rotatedRight(), this.curX, this.curY);
break;
case Qt.Key_Up:
this.tryMove(this.curPiece.rotatedLeft(), this.curX, this.curY);
break;
case Qt.Key_Space:
this.dropDown();
break;
case Qt.Key_D:
this.oneLineDown();
break;
}
}
TetrixBoard.prototype.onTimer = function() {
if (this.isWaitingAfterLine) {
this.isWaitingAfterLine = false;
this.newPiece();
this.ui.timer.start(this.timeoutTime());
} else {
this.oneLineDown();
}
}
TetrixBoard.prototype.timeoutTime = function() {
return 1000 / (1 + this.level);
}
