/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef TETRIXBOARD_H
#define TETRIXBOARD_H

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

#include "tetrixpiece.h"

QT_BEGIN_NAMESPACE
class QLabel;
QT_END_NAMESPACE

//! [0]
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);
//! [0]

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

#endif
