virtual-mouse.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 BACKENDS_KEYMAPPER_VIRTUAL_MOUSE_H
#define BACKENDS_KEYMAPPER_VIRTUAL_MOUSE_H

#include "common/scummsys.h"

#include "common/events.h"

namespace Common {

class EventDispatcher;
class Keymap;

class VirtualMouse : public EventSource, public EventObserver {
public:
    VirtualMouse(EventDispatcher *eventDispatcher);
    ~VirtualMouse() override;

    // EventSource API
    bool pollEvent(Event &event) override;

    // EventObserver API
    bool notifyEvent(const Event &event) override;

    void addActionsToKeymap(Keymap *keymap);

private:
    static const int32 kUpdateDelay = 12;
    static const int32 kDefaultScreenWidth = 640;

    enum {
        kCustomActionVirtualAxisUp    = 10000,
        kCustomActionVirtualAxisDown  = 10001,
        kCustomActionVirtualAxisLeft  = 10002,
        kCustomActionVirtualAxisRight = 10003,
        kCustomActionVirtualMouseSlow = 10004
    };

    void handleAxisMotion(int16 axisPositionX, int16 axisPositionY);
    float computeJoystickMouseSpeedFactor() const;

    EventDispatcher *_eventDispatcher;

    int16 _inputAxisPositionX;
    int16 _inputAxisPositionY;

    float _mouseVelocityX;
    float _mouseVelocityY;
    float _slowModifier;

    float _subPixelRemainderX;
    float _subPixelRemainderY;

    uint32 _lastUpdateMillis;
};

} // End of namespace Common

#endif // #ifndef BACKENDS_KEYMAPPER_VIRTUAL_MOUSE_H