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The Virtual Mouse is meant to provide a way to control the mouse cursor on system without a physical mouse. It provides keymapper actions that are expected to be bound to game controller axes or buttons.
92 lines
2.8 KiB
C++
92 lines
2.8 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*/
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#ifndef BACKENDS_KEYMAPPER_VIRTUAL_MOUSE_H
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#define BACKENDS_KEYMAPPER_VIRTUAL_MOUSE_H
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#include "common/scummsys.h"
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#include "common/events.h"
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namespace Common {
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class EventDispatcher;
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class Keymap;
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/**
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* The Virtual Mouse can produce mouse move events on systems without a physical mouse.
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*
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* It is useful for moving the mouse cursor using a gamepad or a keyboard.
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*
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* This class defines a keymap with actions for moving the cursor in all four directions.
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* The keymapper produces custom backend events whenever keys bound to these actions are
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* pressed. This class handles the events through its EventObserver interface and produces
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* mouse move events when necesssary through its EventSource interface.
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*/
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class VirtualMouse : public EventSource, public EventObserver {
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public:
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VirtualMouse(EventDispatcher *eventDispatcher);
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~VirtualMouse() override;
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// EventSource API
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bool pollEvent(Event &event) override;
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// EventObserver API
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bool notifyEvent(const Event &event) override;
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/** Add the virtual mouse keymapper actions to a keymap */
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void addActionsToKeymap(Keymap *keymap);
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private:
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static const int32 kUpdateDelay = 12;
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static const int32 kDefaultScreenWidth = 640;
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enum {
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kCustomActionVirtualAxisUp = 10000,
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kCustomActionVirtualAxisDown = 10001,
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kCustomActionVirtualAxisLeft = 10002,
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kCustomActionVirtualAxisRight = 10003,
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kCustomActionVirtualMouseSlow = 10004
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};
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void handleAxisMotion(int16 axisPositionX, int16 axisPositionY);
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float computeJoystickMouseSpeedFactor() const;
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EventDispatcher *_eventDispatcher;
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int16 _inputAxisPositionX;
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int16 _inputAxisPositionY;
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float _mouseVelocityX;
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float _mouseVelocityY;
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float _slowModifier;
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float _subPixelRemainderX;
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float _subPixelRemainderY;
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uint32 _lastUpdateMillis;
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};
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} // End of namespace Common
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#endif // #ifndef BACKENDS_KEYMAPPER_VIRTUAL_MOUSE_H
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