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- /*
- * Copyright (C) 2023 Christopher J. Howard
- *
- * This file is part of Antkeeper source code.
- *
- * Antkeeper source code 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.
- *
- * Antkeeper source code 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 Antkeeper source code. If not, see <http://www.gnu.org/licenses/>.
- */
-
- #ifndef ANTKEEPER_INPUT_CONTROL_HPP
- #define ANTKEEPER_INPUT_CONTROL_HPP
-
- #include "input/input-events.hpp"
- #include "event/publisher.hpp"
- #include <functional>
-
- namespace input {
-
- /**
- * Generates control-related input events on activation state changes.
- */
- class control
- {
- public:
- /**
- * Threshold function type.
- *
- * Given an input value, returns `true` if the control should be considered active, and `false` otherwise.
- */
- typedef std::function<bool(float)> threshold_function_type;
-
- /// Constructs a control.
- control();
-
- /**
- * Sets the threshold function.
- *
- * @param function Threshold function.
- */
- void set_threshold_function(const threshold_function_type& function);
-
- /**
- * Evaluates the activation state of the control, according to its threshold function and an input value.
- *
- * @param value Input value.
- */
- void evaluate(float value);
-
- /// Returns the threshold function.
- [[nodiscard]] inline const threshold_function_type& get_threshold_function() const noexcept
- {
- return threshold_function;
- }
-
- /// Returns `true` if the control is active, `false` otherwise.
- [[nodiscard]] inline bool is_active() const noexcept
- {
- return active;
- }
-
- /// Returns the channel through which control activated events are published.
- [[nodiscard]] inline ::event::channel<control_activated_event>& get_activated_channel() noexcept
- {
- return activated_publisher.channel();
- }
-
- /// Returns the channel through which control active events are published.
- [[nodiscard]] inline ::event::channel<control_active_event>& get_active_channel() noexcept
- {
- return active_publisher.channel();
- }
-
- /// Returns the channel through which control deactivated events are published.
- [[nodiscard]] inline ::event::channel<control_deactivated_event>& get_deactivated_channel() noexcept
- {
- return deactivated_publisher.channel();
- }
-
- private:
- threshold_function_type threshold_function;
- bool active;
-
- control_activated_event activated_event;
- control_active_event active_event;
- control_deactivated_event deactivated_event;
-
- ::event::publisher<control_activated_event> activated_publisher;
- ::event::publisher<control_active_event> active_publisher;
- ::event::publisher<control_deactivated_event> deactivated_publisher;
- };
-
- } // namespace input
-
- #endif // ANTKEEPER_INPUT_CONTROL_HPP
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