slint/api/sixtyfps-cpp/include/sixtyfps_signals.h

#pragma once
#include <string_view>
#include "sixtyfps_signals_internal.h"

namespace sixtyfps {

// template<typename... Args>
struct Signal
{
    Signal() { internal::sixtyfps_signal_init(&inner); }
    ~Signal() { internal::sixtyfps_signal_drop(&inner); }
    Signal(const Signal &) = delete;
    Signal(Signal &&) = delete;
    Signal &operator=(const Signal &) = delete;

    template<typename F>
    void set_handler(F binding)
    {
        internal::sixtyfps_signal_set_handler(
                &inner,
                [](const void *user_data, const void *value) {
                    (*reinterpret_cast<F *>(user_data))(value);
                },
                new F(binding),
                [](const void *user_data) { delete reinterpret_cast<F *>(user_data); });
    }

    void emit(void *data) const { internal::sixtyfps_signal_emit(&inner, data); }

private:
    internal::SignalOpaque inner;
};
}