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107 lines
4.4 KiB
C++
107 lines
4.4 KiB
C++
/*****************************************************************************************
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* *
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* OpenSpace *
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* *
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* Copyright (c) 2014-2024 *
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* *
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* Permission is hereby granted, free of charge, to any person obtaining a copy of this *
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* software and associated documentation files (the "Software"), to deal in the Software *
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* without restriction, including without limitation the rights to use, copy, modify, *
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* merge, publish, distribute, sublicense, and/or sell copies of the Software, and to *
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* permit persons to whom the Software is furnished to do so, subject to the following *
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* conditions: *
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* *
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* The above copyright notice and this permission notice shall be included in all copies *
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* or substantial portions of the Software. *
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* *
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, *
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* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A *
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* PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT *
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* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF *
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* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE *
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* OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
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****************************************************************************************/
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#ifndef __OPENSPACE_CORE___TOUCH___H__
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#define __OPENSPACE_CORE___TOUCH___H__
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#include <glm/vec2.hpp>
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#include <cstdint>
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#include <deque>
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namespace openspace {
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/**
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* The TouchInput represents a single finger/device-input at a specific point in time. The
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* fingerId and touchDeviceId coupled with the timestamp allows this to be compared with
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* other TouchInputs in order to calculate gesture-like behavior.
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*/
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struct TouchInput {
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TouchInput(size_t touchDeviceId, size_t fingerId, float x, float y, double timestamp);
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glm::vec2 screenCoordinates(const glm::vec2& resolution) const;
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glm::vec2 currentWindowCoordinates() const;
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bool isMoving() const;
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float distanceToPos(float otherX, float otherY) const;
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float angleToPos(float otherX, float otherY) const;
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size_t touchDeviceId;
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size_t fingerId;
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float x;
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float y;
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float dx = 0.f; // movement in x direction since last touch input
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float dy = 0.f; // movement in y direction since last touch input
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double timestamp; // timestamp in seconds from global touch initialization
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};
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/**
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* The TouchInputHolder holds one or many TouchInputs, in order to track the history of
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* the finger/input device.
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*/
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class TouchInputHolder {
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public:
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TouchInputHolder(TouchInput input);
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/**
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* Succeeds upon a different input than last. Fails upon a too similar input as last.
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* Updates time for the last input if same position.
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*/
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bool tryAddInput(TouchInput input);
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void clearInputs();
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/**
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* Checks whether or not this Holder actually holds a specific input (based on IDs).
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* Succeeds when `input` is held by this Holder. Fails if `input` is not held by this
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* Holder.
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*/
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bool holdsInput(const TouchInput &input) const;
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size_t touchDeviceId() const;
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size_t fingerId() const;
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float speedX() const;
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float speedY() const;
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bool isMoving() const;
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float gestureDistance() const;
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double gestureTime() const;
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size_t numInputs() const;
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const TouchInput& firstInput() const;
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const TouchInput& latestInput() const;
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const std::deque<TouchInput>& peekInputs() const;
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private:
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/// A deque of recorded inputs. Adding newer points to the front of the queue
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std::deque<TouchInput> _inputs;
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TouchInput _firstInput;
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size_t _touchDeviceId;
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size_t _fingerId;
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};
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} // namespace openspace
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#endif // __OPENSPACE_CORE___TOUCH___H__
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