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tetrixpiece.h Example File
widgets/tetrix/tetrixpiece.h

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 #ifndef TETRIXPIECE_H
 #define TETRIXPIECE_H

 enum TetrixShape { NoShape, ZShape, SShape, LineShape, TShape, SquareShape,
                    LShape, MirroredLShape };

 class TetrixPiece
 {
 public:
     TetrixPiece() { setShape(NoShape); }

     void setRandomShape();
     void setShape(TetrixShape shape);

     TetrixShape shape() const { return pieceShape; }
     int x(int index) const { return coords[index][0]; }
     int y(int index) const { return coords[index][1]; }
     int minX() const;
     int maxX() const;
     int minY() const;
     int maxY() const;
     TetrixPiece rotatedLeft() const;
     TetrixPiece rotatedRight() const;

 private:
     void setX(int index, int x) { coords[index][0] = x; }
     void setY(int index, int y) { coords[index][1] = y; }

     TetrixShape pieceShape;
     int coords[4][2];
 };

 #endif