tetrixboard.cpp Example File | Qt 4.8 (original) (raw)

widgets/tetrix/tetrixboard.cpp

#include

#include "tetrixboard.h"

TetrixBoard::TetrixBoard(QWidget *parent) : QFrame(parent) { setFrameStyle(QFrame::Panel | QFrame::Sunken); setFocusPolicy(Qt::StrongFocus); isStarted = false; isPaused = false; clearBoard();

nextPiece.setRandomShape();

}

void TetrixBoard::setNextPieceLabel(QLabel *label) { nextPieceLabel = label; }

QSize TetrixBoard::sizeHint() const { return QSize(BoardWidth * 15 + frameWidth() * 2, BoardHeight * 15 + frameWidth() * 2); }

QSize TetrixBoard::minimumSizeHint() const { return QSize(BoardWidth * 5 + frameWidth() * 2, BoardHeight * 5 + frameWidth() * 2); }

void TetrixBoard::start() { if (isPaused) return;

isStarted = true;
isWaitingAfterLine = false;
numLinesRemoved = 0;
numPiecesDropped = 0;
score = 0;
level = 1;
clearBoard();

emit linesRemovedChanged(numLinesRemoved);
emit scoreChanged(score);
emit levelChanged(level);

newPiece();
timer.start(timeoutTime(), this);

}

void TetrixBoard::pause() { if (!isStarted) return;

isPaused = !isPaused;
if (isPaused) {
    timer.stop();
} else {
    timer.start(timeoutTime(), this);
}
update();

}

void TetrixBoard::paintEvent(QPaintEvent *event) { QFrame::paintEvent(event);

[QPainter](qpainter.html) painter(this);
[QRect](qrect.html) rect = contentsRect();

if (isPaused) {
    painter.drawText(rect, [Qt](qt-module.html)::AlignCenter, tr("Pause"));
    return;
}

int boardTop = rect.bottom() - BoardHeight*squareHeight();

for (int i = 0; i < BoardHeight; ++i) {
    for (int j = 0; j < BoardWidth; ++j) {
        TetrixShape shape = shapeAt(j, BoardHeight - i - 1);
        if (shape != NoShape)
            drawSquare(painter, rect.left() + j * squareWidth(),
                       boardTop + i * squareHeight(), shape);
    }
}

if (curPiece.shape() != NoShape) {
    for (int i = 0; i < 4; ++i) {
        int x = curX + curPiece.x(i);
        int y = curY - curPiece.y(i);
        drawSquare(painter, rect.left() + x * squareWidth(),
                   boardTop + (BoardHeight - y - 1) * squareHeight(),
                   curPiece.shape());
    }
}

}

void TetrixBoard::keyPressEvent(QKeyEvent *event) { if (!isStarted || isPaused || curPiece.shape() == NoShape) { QFrame::keyPressEvent(event); return; }

switch (event->key()) {
case [Qt](qt-module.html)::Key_Left:
    tryMove(curPiece, curX - 1, curY);
    break;
case [Qt](qt-module.html)::Key_Right:
    tryMove(curPiece, curX + 1, curY);
    break;
case [Qt](qt-module.html)::Key_Down:
    tryMove(curPiece.rotatedRight(), curX, curY);
    break;
case [Qt](qt-module.html)::Key_Up:
    tryMove(curPiece.rotatedLeft(), curX, curY);
    break;
case [Qt](qt-module.html)::Key_Space:
    dropDown();
    break;
case [Qt](qt-module.html)::Key_D:
    oneLineDown();
    break;
default:
    [QFrame](qframe.html)::keyPressEvent(event);
}

}

void TetrixBoard::timerEvent(QTimerEvent *event) { if (event->timerId() == timer.timerId()) { if (isWaitingAfterLine) { isWaitingAfterLine = false; newPiece(); timer.start(timeoutTime(), this); } else { oneLineDown(); } } else { QFrame::timerEvent(event); } }

void TetrixBoard::clearBoard() { for (int i = 0; i < BoardHeight * BoardWidth; ++i) board[i] = NoShape; }

void TetrixBoard::dropDown() { int dropHeight = 0; int newY = curY; while (newY > 0) { if (!tryMove(curPiece, curX, newY - 1)) break; --newY; ++dropHeight; } pieceDropped(dropHeight); }

void TetrixBoard::oneLineDown() { if (!tryMove(curPiece, curX, curY - 1)) pieceDropped(0); }

void TetrixBoard::pieceDropped(int dropHeight) { for (int i = 0; i < 4; ++i) { int x = curX + curPiece.x(i); int y = curY - curPiece.y(i); shapeAt(x, y) = curPiece.shape(); }

++numPiecesDropped;
if (numPiecesDropped % 25 == 0) {
    ++level;
    timer.start(timeoutTime(), this);
    emit levelChanged(level);
}

score += dropHeight + 7;
emit scoreChanged(score);
removeFullLines();

if (!isWaitingAfterLine)
    newPiece();

}

void TetrixBoard::removeFullLines() { int numFullLines = 0;

for (int i = BoardHeight - 1; i >= 0; --i) {
    bool lineIsFull = true;

    for (int j = 0; j < BoardWidth; ++j) {
        if (shapeAt(j, i) == NoShape) {
            lineIsFull = false;
            break;
        }
    }

    if (lineIsFull) {
        ++numFullLines;
        for (int k = i; k < BoardHeight - 1; ++k) {
            for (int j = 0; j < BoardWidth; ++j)
                shapeAt(j, k) = shapeAt(j, k + 1);
        }
        for (int j = 0; j < BoardWidth; ++j)
            shapeAt(j, BoardHeight - 1) = NoShape;
    }
}

if (numFullLines > 0) {
    numLinesRemoved += numFullLines;
    score += 10 * numFullLines;
    emit linesRemovedChanged(numLinesRemoved);
    emit scoreChanged(score);

    timer.start(500, this);
    isWaitingAfterLine = true;
    curPiece.setShape(NoShape);
    update();
}

}

void TetrixBoard::newPiece() { curPiece = nextPiece; nextPiece.setRandomShape(); showNextPiece(); curX = BoardWidth / 2 + 1; curY = BoardHeight - 1 + curPiece.minY();

if (!tryMove(curPiece, curX, curY)) {
    curPiece.setShape(NoShape);
    timer.stop();
    isStarted = false;
}

}

void TetrixBoard::showNextPiece() { if (!nextPieceLabel) return;

int dx = nextPiece.maxX() - nextPiece.minX() + 1;
int dy = nextPiece.maxY() - nextPiece.minY() + 1;

[QPixmap](qpixmap.html) pixmap(dx * squareWidth(), dy * squareHeight());
[QPainter](qpainter.html) painter(&pixmap);
painter.fillRect(pixmap.rect(), nextPieceLabel->palette().background());

for (int i = 0; i < 4; ++i) {
    int x = nextPiece.x(i) - nextPiece.minX();
    int y = nextPiece.y(i) - nextPiece.minY();
    drawSquare(painter, x * squareWidth(), y * squareHeight(),
               nextPiece.shape());
}
nextPieceLabel->setPixmap(pixmap);

}

bool TetrixBoard::tryMove(const TetrixPiece &newPiece, int newX, int newY) { for (int i = 0; i < 4; ++i) { int x = newX + newPiece.x(i); int y = newY - newPiece.y(i); if (x < 0 || x >= BoardWidth || y < 0 || y >= BoardHeight) return false; if (shapeAt(x, y) != NoShape) return false; }

curPiece = newPiece;
curX = newX;
curY = newY;
update();
return true;

}

void TetrixBoard::drawSquare(QPainter &painter, int x, int y, TetrixShape shape) { static const QRgb colorTable[8] = { 0x000000, 0xCC6666, 0x66CC66, 0x6666CC, 0xCCCC66, 0xCC66CC, 0x66CCCC, 0xDAAA00 };

[QColor](qcolor.html) color = colorTable[int(shape)];
painter.fillRect(x + 1, y + 1, squareWidth() - 2, squareHeight() - 2,
                 color);

painter.setPen(color.light());
painter.drawLine(x, y + squareHeight() - 1, x, y);
painter.drawLine(x, y, x + squareWidth() - 1, y);

painter.setPen(color.dark());
painter.drawLine(x + 1, y + squareHeight() - 1,
                 x + squareWidth() - 1, y + squareHeight() - 1);
painter.drawLine(x + squareWidth() - 1, y + squareHeight() - 1,
                 x + squareWidth() - 1, y + 1);

}

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