47 lines
889 B
C++
47 lines
889 B
C++
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#pragma once
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#include <functional>
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#include <vector>
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namespace pymol
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{
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template <typename... ParamTs> class Event
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{
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public:
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/**
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* Invokes all listener callbacks with parameters.
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* @param params parameters for callback
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*/
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void invoke(ParamTs... params)
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{
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if (m_callbacks.empty()) {
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return;
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}
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for (const auto& callback : m_callbacks) {
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std::invoke(callback, params...);
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}
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}
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/**
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* @func function to be called when event occurs
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*/
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void add_listener(std::function<void(ParamTs...)> func)
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{
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m_callbacks.push_back(std::move(func));
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}
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/**
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* Removes all listeners
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*/
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void reset() { m_callbacks.clear(); }
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/**
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* @return the number of listeners to this event
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*/
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std::size_t size() const { return m_callbacks.size(); }
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private:
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std::vector<std::function<void(ParamTs...)>> m_callbacks;
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};
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} // namespace pymol
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