events.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 LASTEXPRESS_EVENTS_H
#define LASTEXPRESS_EVENTS_H

#include "lastexpress/lastexpress.h"

namespace LastExpress {

class LastExpressEngine;
class LogicManager;

struct ConsCallParam {
    ConsCallParam() : intParam(0), stringParam(nullptr) {}

    template<typename T>
    ConsCallParam(T param) : intParam(static_cast<int32>(param)), stringParam(nullptr) {}

    ConsCallParam(const char *param) : intParam(0), stringParam(param) {}
    ConsCallParam(char *param) : intParam(0), stringParam(param) {}

    int32 intParam;
    const char *stringParam;
};

typedef struct Message {
    int receiver;
    int action;
    int sender;
    ConsCallParam param;

    Message() {
        clear();
    }

    void clear() {
        receiver = 0;
        action = 0;
        sender = 0;
    }
} Message;

typedef struct Event {
    int channel;
    int x;
    int y;
    int flags;

    Event() {
        channel = 0;
        x = 0;
        y = 0;
        flags = 0;
    }
} Event;

class MessageManager {
    friend class LastExpressEngine;
    friend class LogicManager;
    friend class MemoryManager;

public:
    MessageManager(LastExpressEngine *engine);
    ~MessageManager();

    void setMessageHandle(int handleChannel, void (LogicManager::*handle)(Message *));
    void (LogicManager::*getMessageHandle(int handleChannel))(Message *);
    void setEventHandle(int handleChannel, void (LastExpressEngine::*handle)(Event *));
    void (LastExpressEngine::*getEventHandle(int handleChannel))(Event *);
    void addEvent(int channel, int x, int y, int flags);
    Event *getEvent();
    void addMessage(int receiver, int actionId, int sender, ConsCallParam param);
    Message *getMessage();
    bool process();
    void flush();
    void flushTime();
    void forceMessage(Message *msg);
    void clearMessageQueue();
    void clearEventQueue();
    void clearClickEvents();
    void saveMessages(CVCRFile *file);
    void loadMessages(CVCRFile *file);

private:
    LastExpressEngine *_engine = nullptr;

    Message _messages[128];
    Message _emptyMessage;
    void (LogicManager::*_messageHandles[40])(Message *);
    int _curMsgIndex = 0;
    int _numMsgsInQueue = 0;
    int _nextMsgIndex = 0;
    Message *_autoMessages = nullptr;

    Event _events[128];
    void (LastExpressEngine::*_eventHandles[16])(Event *);
    int _doubleClickMaxFrames = 30;
    int _latestTickLeftMousePressed = 0;
    int _lastEventIndex = 128;
    int _curEventIndex = 0;
    int _numEventsInQueue = 0;
    int _nextEventIndex = 0;
    bool _systemEventRightMouseDown = false;
    bool _systemEventLeftMouseDown = false;
};

} // End of namespace LastExpress

#endif // LASTEXPRESS_EVENTS_H