slidingpuzzle.h

/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
 
#ifndef PELROCK_SLIDINGPUZZLE_H
#define PELROCK_SLIDINGPUZZLE_H
 
namespace Pelrock {
 
static const int kPuzzleScreenWidth = 640;
static const int kPuzzleScreenHeight = 400;
static const int kNumPuzzleSizes = 4;
static const int kTileSizes[kNumPuzzleSizes] = {80, 40, 20, 10};
static const byte kEmptyTileColor = 0x0F;
 
class SlidingPuzzle {
public:
    SlidingPuzzle(PelrockEventManager *eventMan, SoundManager *sound);
    ~SlidingPuzzle();
 
    void run();
 
    // Persisted across activations so the size cycles each time.
    static byte _sizeIndex;
 
private:
    PelrockEventManager *_events;
    SoundManager *_sound;
 
    void playTileSound();
 
    int _tileSize;
    int _gridWidth;
    int _gridHeight;
    int _totalTiles;  // gridWidth * gridHeight`
    int _emptyPos;    // index of the empty (removed) tile
    uint16 *_tileMap; // logical position -> original tile index
 
    Graphics::ManagedSurface _puzzleBuffer;
 
    void initGrid();
    void drawGridLines();
    void swapTiles(int a, int b);
    void fillEmptyTile(int pos);
    void shuffleLoop();
    void ensureSolvable();
    void puzzleLoop();
    bool handleClick(int screenX, int screenY);
    bool isSolved() const;
    void showOriginalImage();
    void present();
};
 
} // End of namespace Pelrock
 
#endif // PELROCK_SLIDING_PUZZLE_H