source: trunk/examples/widgets/tetrix/tetrixpiece.cpp@ 490

/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Qt Software Information (qt-info@nokia.com)
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial Usage
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain
** additional rights. These rights are described in the Nokia Qt LGPL
** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at qt-sales@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/

#include <QtCore>

#include <stdlib.h>

#include "tetrixpiece.h"

//! [0]
void TetrixPiece::setRandomShape()
{
    setShape(TetrixShape(qrand() % 7 + 1));
}
//! [0]

//! [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;
//! [1] //! [2]
}
//! [2]

//! [3]
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
//! [3] //! [4]
{
    int max = coords[0][0];
    for (int i = 1; i < 4; ++i)
        max = qMax(max, coords[i][0]);
    return max;
}
//! [4]

//! [5]
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
//! [5] //! [6]
{
    int max = coords[0][1];
    for (int i = 1; i < 4; ++i)
        max = qMax(max, coords[i][1]);
    return max;
}
//! [6]

//! [7]
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));
    }
//! [7]
    return result;
}

//! [9]
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));
    }
//! [9]
    return result;
}