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

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

namespace sixtyfps {

template<typename T>
struct Property
{
    Property() { internal::sixtyfps_property_init(&inner); }
    ~Property() { internal::sixtyfps_property_drop(&inner); }
    Property(const Property &) = delete;
    Property(Property &&) = delete;
    Property &operator=(const Property &) = delete;

    /* Should it be implicit?
    void operator=(const T &value) {
        set(value);
    }*/

    void set(const T &value) const
    {
        this->value = value;
        internal::sixtyfps_property_set_changed(&inner);
    }

    const T &get(const internal::EvaluationContext *context) const
    {
        internal::sixtyfps_property_update(&inner, context, &value);
        return value;
    }

    template<typename F>
    void set_binding(F binding) const
    {
        internal::sixtyfps_property_set_binding(
                &inner,
                [](void *user_data, const internal::EvaluationContext *context, void *value) {
                    *reinterpret_cast<T *>(value) = (*reinterpret_cast<F *>(user_data))(context);
                },
                new F(binding), [](void *user_data) { delete reinterpret_cast<F *>(user_data); });
    }

private:
    internal::PropertyHandleOpaque inner;
    mutable T value{};
};
}