Qt 4.8: tetrixboard.h Example File (widgets/tetrix/tetrixboard.h)

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# tetrixboard.h Example File

widgets/tetrix/tetrixboard.h

     /****************************************************************************
     **
     ** 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
     ** met:
     **   * Redistributions of source code must retain the above copyright
     **     notice, this list of conditions and the following disclaimer.
     **   * Redistributions in binary form must reproduce the above copyright
     **     notice, this list of conditions and the following disclaimer in
     **     the documentation and/or other materials provided with the
     **     distribution.
     **   * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
     **     of its contributors may be used to endorse or promote products derived
     **     from this software without specific prior written permission.
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     ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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     #ifndef TETRIXBOARD_H
     #define TETRIXBOARD_H

     #include <QBasicTimer>
     #include <QFrame>
     #include <QPointer>

     #include "tetrixpiece.h"

     class QLabel;

     class TetrixBoard : public QFrame
     {
         Q_OBJECT

     public:
         TetrixBoard(QWidget *parent = 0);

         void setNextPieceLabel(QLabel *label);
         QSize sizeHint() const;
         QSize minimumSizeHint() const;

     public slots:
         void start();
         void pause();

     signals:
         void scoreChanged(int score);
         void levelChanged(int level);
         void linesRemovedChanged(int numLines);

     protected:
         void paintEvent(QPaintEvent *event);
         void keyPressEvent(QKeyEvent *event);
         void timerEvent(QTimerEvent *event);

     private:
         enum { BoardWidth = 10, BoardHeight = 22 };

         TetrixShape &shapeAt(int x, int y) { return board[(y * BoardWidth) + x]; }
         int timeoutTime() { return 1000 / (1 + level); }
         int squareWidth() { return contentsRect().width() / BoardWidth; }
         int squareHeight() { return contentsRect().height() / BoardHeight; }
         void clearBoard();
         void dropDown();
         void oneLineDown();
         void pieceDropped(int dropHeight);
         void removeFullLines();
         void newPiece();
         void showNextPiece();
         bool tryMove(const TetrixPiece &newPiece, int newX, int newY);
         void drawSquare(QPainter &painter, int x, int y, TetrixShape shape);

         QBasicTimer timer;
         QPointer<QLabel> nextPieceLabel;
         bool isStarted;
         bool isPaused;
         bool isWaitingAfterLine;
         TetrixPiece curPiece;
         TetrixPiece nextPiece;
         int curX;
         int curY;
         int numLinesRemoved;
         int numPiecesDropped;
         int score;
         int level;
         TetrixShape board[BoardWidth * BoardHeight];
     };

     #endif