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# tetrixpiece.cpp Example File
widgets/tetrix/tetrixpiece.cpp

    /****************************************************************************
    **
    ** Copyright (C) 2004-2006 Trolltech ASA. All rights reserved.
    **
    ** This file is part of the example classes of the Qt Toolkit.
    **
    ** Licensees holding valid Qt Preview licenses may use this file in
    ** accordance with the Qt Preview License Agreement provided with the
    ** Software.
    **
    ** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
    ** information about Qt Commercial License Agreements.
    **
    ** Contact info@trolltech.com if any conditions of this licensing are
    ** not clear to you.
    **
    ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
    ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
    **
    ****************************************************************************/

    #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;
    }