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-rw-r--r--xbmc/input/touch/generic/GenericTouchInputHandler.h98
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diff --git a/xbmc/input/touch/generic/GenericTouchInputHandler.h b/xbmc/input/touch/generic/GenericTouchInputHandler.h
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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;
+};