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/*
* Copyright (C) 2012-2018 Team Kodi
* This file is part of Kodi - https://kodi.tv
*
* SPDX-License-Identifier: GPL-2.0-or-later
* See LICENSES/README.md for more information.
*/
#pragma once
#include "input/touch/ITouchInputHandler.h"
#include "input/touch/TouchTypes.h"
#include "threads/CriticalSection.h"
#include "threads/Timer.h"
#include <array>
#include <memory>
#include <set>
class IGenericTouchGestureDetector;
/*!
* \ingroup touch_generic
* \brief Generic implementation of ITouchInputHandler to handle low level (raw)
* touch events and translate them into touch actions which are passed
* on to the registered ITouchActionHandler implementation.
*
* The generic implementation supports single a double touch and hold
* actions and basic gesture recognition for panning, swiping, pinching/zooming
* and rotating.
*
* \sa ITouchInputHandler
*/
class CGenericTouchInputHandler : public ITouchInputHandler, private ITimerCallback
{
public:
/*!
\brief Get an instance of the touch input manager
*/
static CGenericTouchInputHandler& GetInstance();
static constexpr int MAX_POINTERS = 2;
// implementation of ITouchInputHandler
bool HandleTouchInput(TouchInput event,
float x,
float y,
int64_t time,
int32_t pointer = 0,
float size = 0.0f) override;
bool UpdateTouchPointer(
int32_t pointer, float x, float y, int64_t time, float size = 0.0f) override;
private:
// private construction, and no assignments; use the provided singleton methods
CGenericTouchInputHandler();
~CGenericTouchInputHandler() override;
CGenericTouchInputHandler(const CGenericTouchInputHandler&) = delete;
CGenericTouchInputHandler const& operator=(CGenericTouchInputHandler const&) = delete;
typedef enum
{
TouchGestureUnknown = 0,
// only primary pointer active but stationary so far
TouchGestureSingleTouch,
// primary pointer active but stationary for a certain time
TouchGestureSingleTouchHold,
// primary pointer moving
TouchGesturePan,
// at least two pointers active but stationary so far
TouchGestureMultiTouchStart,
// at least two pointers active but stationary for a certain time
TouchGestureMultiTouchHold,
// at least two pointers active and moving
TouchGestureMultiTouch,
// all but primary pointer have been lifted
TouchGestureMultiTouchDone
} TouchGestureState;
// implementation of ITimerCallback
void OnTimeout() override;
void saveLastTouch();
void setGestureState(TouchGestureState gestureState)
{
m_gestureStateOld = m_gestureState;
m_gestureState = gestureState;
}
void triggerDetectors(TouchInput event, int32_t pointer);
float AdjustPointerSize(float size);
CCriticalSection m_critical;
std::unique_ptr<CTimer> m_holdTimer;
std::array<Pointer, MAX_POINTERS> m_pointers;
std::set<std::unique_ptr<IGenericTouchGestureDetector>> m_detectors;
TouchGestureState m_gestureState = TouchGestureUnknown;
TouchGestureState m_gestureStateOld = TouchGestureUnknown;
};
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