俄罗斯方块简易qt代码

俄罗斯方块是一种经典的游戏，这里提供一份简易的Qt代码示例可以供参考：

首先，需要引入一些Qt的头文件：

#include <QMainWindow>
#include <QKeyEvent>
#include <QPainter>
#include <QPixmap>
#include <QTimer>

然后，定义常量和数据结构：

const int BLOCK_SIZE = 20; // 方块边长
const int COLS = 10; // 游戏区列数
const int ROWS = 20; // 游戏区行数

struct Point {
    int x, y;
};

接着，定义游戏区的数据和方块的数据：

class Window : public QMainWindow {
    Q_OBJECT
public:
    Window(QWidget *parent = 0) : QMainWindow(parent) {
        setFixedSize(COLS * BLOCK_SIZE, ROWS * BLOCK_SIZE);
        mTimer.start(500);

        mEmptyBlock = QPixmap(BLOCK_SIZE, BLOCK_SIZE);
        mEmptyBlock.fill(Qt::black);

        mPlaying = false;
    }

protected:
    void paintEvent(QPaintEvent*) {
        QPainter painter(this);
        painter.setBrush(Qt::NoBrush);

        painter.drawPixmap(0, 0, COLS * BLOCK_SIZE, ROWS * BLOCK_SIZE, mGameArea);

        for (int i = 0; i < 4; ++i) {
            painter.drawPixmap(mBlock[i].x * BLOCK_SIZE, mBlock[i].y * BLOCK_SIZE,
                                BLOCK_SIZE, BLOCK_SIZE, mBlocks[mBlockType]);
        }
    }

    void keyPressEvent(QKeyEvent* ev) {
        if (!mPlaying) return;

        switch (ev->key()) {
            case Qt::Key_Left:
                if (canMove(-1, 0)) {
                    moveLeft();
                }
                break;
            case Qt::Key_Right:
                if (canMove(1, 0)) {
                    moveRight();
                }
                break;
            case Qt::Key_Down:
                if (canMove(0, 1)) {
                    moveDown();
                }
                break;
            case Qt::Key_Up:
                rotate();
                break;
        }
    }

private slots:
    void onTimer() {
        if (canMove(0, 1)) {
            moveDown();
        } else {
            mergeBlock();

            if (isGameOver()) {
                mPlaying = false;
                mBlocks.clear();
                mGameArea = QPixmap();
                QMessageBox::information(this, "Game Over", "Game Over");
                return;
            }

            newBlock();
        }

        repaint();
    }

private:
    bool mPlaying;
    QPixmap mGameArea;
    QTimer mTimer;
    QPixmap mEmptyBlock;
    QVector<QPixmap> mBlocks;
    QVector<Point> mBlock;
    int mBlockType;

    void moveLeft() {
        for (int i = 0; i < 4; ++i) {
            mBlock[i].x--;
        }
    }

    void moveRight() {
        for (int i = 0; i < 4; ++i) {
            mBlock[i].x++;
        }
    }

    void moveDown() {
        for (int i = 0; i < 4; ++i) {
            mBlock[i].y++;
        }
    }

    void rotate() {
        Point center = mBlock[1];
        for (int i = 0; i < 4; ++i) {
            int x = mBlock[i].y - center.y;
            int y = mBlock[i].x - center.x;
            mBlock[i].x = center.x - x;
            mBlock[i].y = center.y + y;
        }
    }

    bool canMove(int dx, int dy) {
        for (int i = 0; i < 4; ++i) {
            int x = mBlock[i].x + dx;
            int y = mBlock[i].y + dy;
            if (x < 0 || x >= COLS || y >= ROWS) return false;
            if (y >= 0 && mGameArea.toImage().pixelColor(x * BLOCK_SIZE, y * BLOCK_SIZE) != QColor(0, 0, 0)) return false;
        }
        return true;
    }

    void mergeBlock() {
        for (int i = 0; i < 4; ++i) {
            mGameArea.copy(mBlock[i].x * BLOCK_SIZE, mBlock[i].y * BLOCK_SIZE,
                           BLOCK_SIZE, BLOCK_SIZE,
                           mBlocks[mBlockType],
                           mBlock[i].x * BLOCK_SIZE, mBlock[i].y * BLOCK_SIZE);
        }

        for (int i = ROWS - 1; i >= 0; --i) {
            bool full = true;
            for (int j = 0; j < COLS; ++j) {
                if (mGameArea.toImage().pixelColor(j * BLOCK_SIZE, i * BLOCK_SIZE) == QColor(0, 0, 0)) {
                    full = false;
                    break;
                }
            }

            if (full) {
                mGameArea = QPixmap(mEmptyBlock) + mGameArea.copy(0, 0, COLS * BLOCK_SIZE, i * BLOCK_SIZE) + mGameArea.copy(0, (i + 1) * BLOCK_SIZE, COLS * BLOCK_SIZE, (ROWS - i - 1) * BLOCK_SIZE);
            }
        }
    }

    bool isGameOver() {
        for (int i = 0; i < 4; ++i) {
            if (mBlock[i].y < 0) return true;
        }

        return false;
    }

    void newBlock() {
        mBlockType = qrand() % mBlocks.size();

        for (int i = 0; i < 4; ++i) {
            mBlock[i].x = mBlocks[mBlockType].width() / BLOCK_SIZE / 2 + i - 2;
            mBlock[i].y = 0;
        }
    }
};

最后，在Qt应用程序的主函数中创建游戏窗口并运行即可：

int main(int argc, char **argv) {
    QApplication app(argc, argv);

    qsrand(QTime(0, 0, 0).secsTo(QTime::currentTime()));

    Window w;
    w.show();

    return app.exec();
}

这就是一个简单的俄罗斯方块Qt代码示例，完整代码可以在网上找到。