Qt 4.8: tetrixpiece.cpp Example File (widgets/tetrix/tetrixpiece.cpp)

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# tetrixpiece.cpp Example File

widgets/tetrix/tetrixpiece.cpp

     /****************************************************************************
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     ** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
     ** Contact: http://www.qt-project.org/legal
     **
     ** This file is part of the examples of the Qt Toolkit.
     **
     ** $QT_BEGIN_LICENSE:BSD$
     ** You may use this file under the terms of the BSD license as follows:
     **
     ** "Redistribution and use in source and binary forms, with or without
     ** modification, are permitted provided that the following conditions are
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     **   * Redistributions of source code must retain the above copyright
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     **     notice, this list of conditions and the following disclaimer in
     **     the documentation and/or other materials provided with the
     **     distribution.
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     **     of its contributors may be used to endorse or promote products derived
     **     from this software without specific prior written permission.
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     #include <QtCore>

     #include <stdlib.h>

     #include "tetrixpiece.h"

     void TetrixPiece::setRandomShape()
     {
         setShape(TetrixShape(qrand() % 7 + 1));
     }

     void TetrixPiece::setShape(TetrixShape shape)
     {
         static const int coordsTable[8][4][2] = {
             { { 0, 0 },   { 0, 0 },   { 0, 0 },   { 0, 0 } },
             { { 0, -1 },  { 0, 0 },   { -1, 0 },  { -1, 1 } },
             { { 0, -1 },  { 0, 0 },   { 1, 0 },   { 1, 1 } },
             { { 0, -1 },  { 0, 0 },   { 0, 1 },   { 0, 2 } },
             { { -1, 0 },  { 0, 0 },   { 1, 0 },   { 0, 1 } },
             { { 0, 0 },   { 1, 0 },   { 0, 1 },   { 1, 1 } },
             { { -1, -1 }, { 0, -1 },  { 0, 0 },   { 0, 1 } },
             { { 1, -1 },  { 0, -1 },  { 0, 0 },   { 0, 1 } }
         };

         for (int i = 0; i < 4 ; i++) {
             for (int j = 0; j < 2; ++j)
                 coords[i][j] = coordsTable[shape][i][j];
         }
         pieceShape = shape;
     }

     int TetrixPiece::minX() const
     {
         int min = coords[0][0];
         for (int i = 1; i < 4; ++i)
             min = qMin(min, coords[i][0]);
         return min;
     }

     int TetrixPiece::maxX() const
     {
         int max = coords[0][0];
         for (int i = 1; i < 4; ++i)
             max = qMax(max, coords[i][0]);
         return max;
     }

     int TetrixPiece::minY() const
     {
         int min = coords[0][1];
         for (int i = 1; i < 4; ++i)
             min = qMin(min, coords[i][1]);
         return min;
     }

     int TetrixPiece::maxY() const
     {
         int max = coords[0][1];
         for (int i = 1; i < 4; ++i)
             max = qMax(max, coords[i][1]);
         return max;
     }

     TetrixPiece TetrixPiece::rotatedLeft() const
     {
         if (pieceShape == SquareShape)
             return *this;

         TetrixPiece result;
         result.pieceShape = pieceShape;
         for (int i = 0; i < 4; ++i) {
             result.setX(i, y(i));
             result.setY(i, -x(i));
         }
         return result;
     }

     TetrixPiece TetrixPiece::rotatedRight() const
     {
         if (pieceShape == SquareShape)
             return *this;

         TetrixPiece result;
         result.pieceShape = pieceShape;
         for (int i = 0; i < 4; ++i) {
             result.setX(i, -y(i));
             result.setY(i, x(i));
         }
         return result;
     }