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grid.h

/* ScummVM - Scumm Interpreter
 * Copyright (C) 2003-2005 The ScummVM project
 *
 * 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 2
 * 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, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * $Header: /cvsroot/scummvm/scummvm/queen/grid.h,v 1.7.2.1 2005/10/18 02:11:19 sev Exp $
 *
 */

#ifndef QUEENGRID_H
#define QUEENGRID_H

#include "common/util.h"
#include "queen/structs.h"

namespace Queen {

enum GridScreen {
      GS_ROOM  = 0,
      GS_PANEL = 1,
      GS_COUNT = 2
};

class QueenEngine;

class Grid {
public:

      Grid(QueenEngine *vm);
      ~Grid();

      //! read areas data from specified stream
      void readDataFrom(uint16 numObjects, uint16 numRooms, byte *&ptr);

      //! defines a new zone
      void setZone(GridScreen screen, uint16 zoneNum, uint16 x1, uint16 y1, uint16 x2, uint16 y2);

      //! defines a new zone
      void setZone(GridScreen screen, uint16 zoneNum, const Box &box);

      //! find the zone number containing the specified point
      uint16 findZoneForPos(GridScreen screen, uint16 x, uint16 y) const;

      //! find the area number containing the specified point
      uint16 findAreaForPos(GridScreen screen, uint16 x, uint16 y) const;

      //! clear the zones for current room
      void clear(GridScreen screen);

      //! setup objects zones for the specified room
      void setupNewRoom(uint16 room, uint16 firstRoomObjNum);

      //! setup panel zones
      void setupPanel();

      //! draw the zones for current room (debug only)
      void drawZones();

      //! retuns a reference to the specified zone
      const Box *zone(GridScreen screen, uint16 index) const;

      //! get the verb for the specified cursor position
      Verb findVerbUnderCursor(int16 cursorx, int16 cursory) const;

      //! get the object for the specified cursor position
      uint16 findObjectUnderCursor(int16 cursorx, int16 cursory) const;

      //! get the object for the specified zone number
      uint16 findObjectNumber(uint16 zoneNum) const;

      //! get scale for the specified position
      uint16 findScale(uint16 x, uint16 y) const;

      //! returns a reference to the specfied room area
      Area *area(int room, int num) const { return &_area[room][num]; }

      //! returns the number of areas in this room
      uint16 areaMax(int room) const { return _areaMax[room]; }

      //! returns the number of objects in this room
      uint16 objMax(int room) const { return _objMax[room]; }

      void saveState(byte *&ptr);
      void loadState(uint32 ver, byte *&ptr);

      enum {
            MAX_ZONES_NUMBER = 32,
            MAX_AREAS_NUMBER = 11
      };


private:

      struct ZoneSlot {
            bool valid;
            Box box;
      };

      //! current room zones
      ZoneSlot _zones[GS_COUNT][MAX_ZONES_NUMBER];

      //! number of objects for each room
      int16 *_objMax;

      //! number of areas for each room
      int16 *_areaMax;

      //! areas for each room
      Area (*_area)[MAX_AREAS_NUMBER];

      //! total number of room areas
      uint16 _numRoomAreas;

      //! box/zone for each objects
      Box *_objectBox;

      QueenEngine *_vm;
};


} // End of namespace Queen

#endif

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