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/* 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;
/**
* The Virtual Mouse can produce mouse move events on systems without a physical mouse.
*
* It is useful for moving the mouse cursor using a gamepad or a keyboard.
*
* This class defines a keymap with actions for moving the cursor in all four directions.
* The keymapper produces custom backend events whenever keys bound to these actions are
* pressed. This class handles the events through its EventObserver interface and produces
* mouse move events when necesssary through its EventSource interface.
*/
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;
/** Add the virtual mouse keymapper actions to a keymap */
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
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