tetrixboard.h Example File

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  #ifndef TETRIXBOARD_H
  #define TETRIXBOARD_H

  #include <QBasicTimer>
  #include <QFrame>
  #include <QPointer>

  #include "tetrixpiece.h"

  class QLabel;

  class TetrixBoard : public QFrame
  {
      Q_OBJECT

  public:
      TetrixBoard(QWidget *parent = 0);

      void setNextPieceLabel(QLabel *label);
      QSize sizeHint() const override;
      QSize minimumSizeHint() const override;

  public slots:
      void start();
      void pause();

  signals:
      void scoreChanged(int score);
      void levelChanged(int level);
      void linesRemovedChanged(int numLines);

  protected:
      void paintEvent(QPaintEvent *event) override;
      void keyPressEvent(QKeyEvent *event) override;
      void timerEvent(QTimerEvent *event) override;

  private:
      enum { BoardWidth = 10, BoardHeight = 22 };

      TetrixShape &shapeAt(int x, int y) { return board[(y * BoardWidth) + x]; }
      int timeoutTime() { return 1000 / (1 + level); }
      int squareWidth() { return contentsRect().width() / BoardWidth; }
      int squareHeight() { return contentsRect().height() / BoardHeight; }
      void clearBoard();
      void dropDown();
      void oneLineDown();
      void pieceDropped(int dropHeight);
      void removeFullLines();
      void newPiece();
      void showNextPiece();
      bool tryMove(const TetrixPiece &newPiece, int newX, int newY);
      void drawSquare(QPainter &painter, int x, int y, TetrixShape shape);

      QBasicTimer timer;
      QPointer<QLabel> nextPieceLabel;
      bool isStarted;
      bool isPaused;
      bool isWaitingAfterLine;
      TetrixPiece curPiece;
      TetrixPiece nextPiece;
      int curX;
      int curY;
      int numLinesRemoved;
      int numPiecesDropped;
      int score;
      int level;
      TetrixShape board[BoardWidth * BoardHeight];
  };

  #endif