cursor.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 NUVIE_CORE_CURSOR_H
#define NUVIE_CORE_CURSOR_H

#include "ultima/shared/std/string.h"
#include "ultima/shared/std/containers.h"


namespace Ultima {
namespace Nuvie {

class Configuration;
class Screen;
class U6Shape;

typedef struct {
    uint16 point_x, point_y; // hotspot
    unsigned char *shapedat;
    uint16 w, h;
} MousePointer;


/* Contains all mouse pointers, with hotspot and draw methods that work on the
 * active cursor.
 */
class Cursor {
    friend class Screen;
    Screen *screen;
    const Configuration *config;
    sint32 cur_x, cur_y; // location on screen, unused normally
    Std::vector<MousePointer *> cursors; // pointer list
    uint8 cursor_id; // which pointer is active

    unsigned char *cleanup; // restore image behind cursor
    Common::Rect cleanup_area;
    Common::Rect update_area; // clear & display are updated at once (avoid flicker)

    bool hidden;

    uint16 screen_w, screen_h;

    void add_update(uint16 x, uint16 y, uint16 w, uint16 h);
    inline void fix_position(MousePointer *ptr, int &px, int &py);
    void save_backing(uint32 px, uint32 py, uint32 w, uint32 h);

public:
    Cursor();
    ~Cursor()                              {
        unload_all();
    }
    bool init(const Configuration *c, Screen *s, nuvie_game_t game_type);
    uint32 load_all(const Common::Path &filename, nuvie_game_t game_type);
    void unload_all();
    bool set_pointer(uint8 ptr_num);

    void reset_position()           {
        cur_x = -1;
        cur_y = -1;
    }
    void move(uint32 px, uint32 py) {
        cur_x = px;
        cur_y = py;
    }
    void hide()                     {
        hidden = true;
        clear();
        update();
    }
    void show()                     {
        hidden = false;
    }

    void get_hotspot(uint16 &x, uint16 &y) const {
        x = cursors[cursor_id]->point_x;
        y = cursors[cursor_id]->point_y;
    }
    bool display()                         {
        return display(cur_x, cur_y);
    }
    bool display(int px, int py);
    void clear();
    void update();

    bool is_visible() const {
        return !hidden;
    }
};

} // End of namespace Nuvie
} // End of namespace Ultima

#endif