radio_button_widget.hpp

// Copyright Take Vos 2021.
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt)
 
#pragma once
 
#include "abstract_button_widget.hpp"
#include "default_button_delegate.hpp"
 
namespace hi::inline v1 {
 
class radio_button_widget final : public abstract_button_widget {
public:
    using super = abstract_button_widget;
    using delegate_type = typename super::delegate_type;
 
    template<typename Label>
    radio_button_widget(gui_window &window, widget *parent, Label &&label, std::weak_ptr<delegate_type> delegate) noexcept :
        radio_button_widget(window, parent, std::forward<Label>(label), weak_or_unique_ptr{std::move(delegate)})
    {
    }
 
    template<typename Label, typename Value, typename... Args>
    radio_button_widget(gui_window &window, widget *parent, Label &&label, Value &&value, Args &&...args) noexcept
        requires(not std::is_convertible_v<Value, weak_or_unique_ptr<delegate_type>>) :
        radio_button_widget(
            window,
            parent,
            std::forward<Label>(label),
            make_unique_default_button_delegate<button_type::radio>(std::forward<Value>(value), std::forward<Args>(args)...))
    {
    }
 
    widget_constraints const &set_constraints() noexcept override;
    void set_layout(widget_layout const &layout) noexcept override;
    void draw(draw_context const &context) noexcept override;
private:
    static constexpr std::chrono::nanoseconds _animation_duration = std::chrono::milliseconds(150);
 
    extent2 _button_size;
    aarectangle _button_rectangle;
    animator<float> _animated_value = _animation_duration;
    aarectangle _pip_rectangle;
 
    template<typename Label>
    radio_button_widget(gui_window &window, widget *parent, Label &&label, weak_or_unique_ptr<delegate_type> delegate) noexcept :
        super(window, parent, std::move(delegate))
    {
        alignment = alignment::top_left();
        set_label(std::forward<Label>(label));
    }
 
    void draw_radio_button(draw_context const &context) noexcept;
    void draw_radio_pip(draw_context const &context) noexcept;
};
 
} // namespace hi::inline v1