examples/widgets/tetrix/tetrixpiece.cpp
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     1 /****************************************************************************
       
     2 **
       
     3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
       
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    36 **
       
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    38 ** $QT_END_LICENSE$
       
    39 **
       
    40 ****************************************************************************/
       
    41 
       
    42 #include <QtCore>
       
    43 
       
    44 #include <stdlib.h>
       
    45 
       
    46 #include "tetrixpiece.h"
       
    47 
       
    48 //! [0]
       
    49 void TetrixPiece::setRandomShape()
       
    50 {
       
    51     setShape(TetrixShape(qrand() % 7 + 1));
       
    52 }
       
    53 //! [0]
       
    54 
       
    55 //! [1]
       
    56 void TetrixPiece::setShape(TetrixShape shape)
       
    57 {
       
    58     static const int coordsTable[8][4][2] = {
       
    59         { { 0, 0 },   { 0, 0 },   { 0, 0 },   { 0, 0 } },
       
    60         { { 0, -1 },  { 0, 0 },   { -1, 0 },  { -1, 1 } },
       
    61         { { 0, -1 },  { 0, 0 },   { 1, 0 },   { 1, 1 } },
       
    62         { { 0, -1 },  { 0, 0 },   { 0, 1 },   { 0, 2 } },
       
    63         { { -1, 0 },  { 0, 0 },   { 1, 0 },   { 0, 1 } },
       
    64         { { 0, 0 },   { 1, 0 },   { 0, 1 },   { 1, 1 } },
       
    65         { { -1, -1 }, { 0, -1 },  { 0, 0 },   { 0, 1 } },
       
    66         { { 1, -1 },  { 0, -1 },  { 0, 0 },   { 0, 1 } }
       
    67     };
       
    68 
       
    69     for (int i = 0; i < 4 ; i++) {
       
    70         for (int j = 0; j < 2; ++j)
       
    71             coords[i][j] = coordsTable[shape][i][j];
       
    72     }
       
    73     pieceShape = shape;
       
    74 //! [1] //! [2]
       
    75 }
       
    76 //! [2]
       
    77 
       
    78 //! [3]
       
    79 int TetrixPiece::minX() const
       
    80 {
       
    81     int min = coords[0][0];
       
    82     for (int i = 1; i < 4; ++i)
       
    83         min = qMin(min, coords[i][0]);
       
    84     return min;
       
    85 }
       
    86 
       
    87 int TetrixPiece::maxX() const
       
    88 //! [3] //! [4]
       
    89 {
       
    90     int max = coords[0][0];
       
    91     for (int i = 1; i < 4; ++i)
       
    92         max = qMax(max, coords[i][0]);
       
    93     return max;
       
    94 }
       
    95 //! [4]
       
    96 
       
    97 //! [5]
       
    98 int TetrixPiece::minY() const
       
    99 {
       
   100     int min = coords[0][1];
       
   101     for (int i = 1; i < 4; ++i)
       
   102         min = qMin(min, coords[i][1]);
       
   103     return min;
       
   104 }
       
   105 
       
   106 int TetrixPiece::maxY() const
       
   107 //! [5] //! [6]
       
   108 {
       
   109     int max = coords[0][1];
       
   110     for (int i = 1; i < 4; ++i)
       
   111         max = qMax(max, coords[i][1]);
       
   112     return max;
       
   113 }
       
   114 //! [6]
       
   115 
       
   116 //! [7]
       
   117 TetrixPiece TetrixPiece::rotatedLeft() const
       
   118 {
       
   119     if (pieceShape == SquareShape)
       
   120         return *this;
       
   121 
       
   122     TetrixPiece result;
       
   123     result.pieceShape = pieceShape;
       
   124     for (int i = 0; i < 4; ++i) {
       
   125         result.setX(i, y(i));
       
   126         result.setY(i, -x(i));
       
   127     }
       
   128 //! [7]
       
   129     return result;
       
   130 }
       
   131 
       
   132 //! [9]
       
   133 TetrixPiece TetrixPiece::rotatedRight() const
       
   134 {
       
   135     if (pieceShape == SquareShape)
       
   136         return *this;
       
   137 
       
   138     TetrixPiece result;
       
   139     result.pieceShape = pieceShape;
       
   140     for (int i = 0; i < 4; ++i) {
       
   141         result.setX(i, -y(i));
       
   142         result.setY(i, x(i));
       
   143     }
       
   144 //! [9]
       
   145     return result;
       
   146 }