RadioButton.h

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//
// RadioButton.h
//
 
#ifndef MALENA_RADIOBUTTON_H
#define MALENA_RADIOBUTTON_H
 
#pragma once
 
#include <Malena/Core/malena_export.h>
#include <Malena/Traits/Interaction/Selectable.h>
#include <Malena/Core/Component.h>
#include <Malena/Manifests/Manifest.h>
#include <Malena/Resources/FontManager.h>
#include <Malena/Traits/Settings/RadioButtonSettings.h>
#include <Malena/Traits/Theme/RadioButtonTheme.h>
#include <Malena/Traits/Theme/Themeable.h>
#include <SFML/Graphics/CircleShape.hpp>
#include <SFML/Graphics/RenderTarget.hpp>
#include <SFML/Graphics/Text.hpp>
#include <string>
#include <type_traits>
 
namespace ml
{
    class MALENA_API RadioButtonManifest : public ml::Manifest
    {
    public:
        enum class Flag  { SELECTED };
        enum class State { IDLE, HOVERED, SELECTED };   // disabled derives from ml::Flag::ENABLED
    };

    class MALENA_API RadioButton : public ComponentWith<RadioButtonManifest>,
                        public RadioButtonSettings,
                        public RadioButtonTheme,
                        public Themeable,
                        public Selectable
    {
    public:
        using Flag  = RadioButtonManifest::Flag;
        using State = RadioButtonManifest::State;
 
    private:
        sf::CircleShape _ring;
        sf::CircleShape _dot;
        sf::Text        _label;
        sf::Vector2f    _position = {0.f, 0.f};
        std::string     _labelStr;
 
        void layout();
        void applyVisualState();
 
    protected:
        void draw(sf::RenderTarget& target, sf::RenderStates states) const override;
        void onThemeApplied(const Theme& theme) override;
        void onEnabledChanged(bool enabled) override;
 
    public:
        explicit RadioButton(const std::string& label = "",
                             const sf::Font& font = FontManager<>::getDefault());
 
        // ── Apply ─────────────────────────────────────────────────────────────
 
        template<typename S>
        void applySettings(const S& s)
        {
            static_assert(std::is_base_of_v<RadioButtonSettings, S>,
                "applySettings() requires a type derived from RadioButtonSettings");
            static_cast<RadioButtonSettings&>(*this) = s;
            layout();
        }
 
        template<typename T>
        void applyTheme(const T& t)
        {
            static_assert(std::is_base_of_v<RadioButtonTheme, T>,
                "applyTheme() requires a type derived from RadioButtonTheme");
            static_cast<RadioButtonTheme&>(*this) = t;
            applyVisualState();
        }
 
        template<typename St>
        void applyStyle(const St& s)
        {
            static_assert(std::is_base_of_v<RadioButtonSettings, St> &&
                          std::is_base_of_v<RadioButtonTheme, St>,
                "applyStyle() requires RadioButtonSettings and RadioButtonTheme");
            static_cast<RadioButtonSettings&>(*this) = s;
            static_cast<RadioButtonTheme&>(*this)    = s;
            layout();
        }
 
        // ── Selection ─────────────────────────────────────────────────────────
 
        void select();
        void deselect();
        [[nodiscard]] bool isSelected() const;
 
        // ── Enabled / disabled ────────────────────────────────────────────────
 
        // ── Label ─────────────────────────────────────────────────────────────
 
        void setLabel(const std::string& label);
        [[nodiscard]] std::string getLabel() const;
 
        // ── Positionable ──────────────────────────────────────────────────────
 
        void          setPosition(const sf::Vector2f& position) override;
        sf::Vector2f  getPosition()     const override;
        sf::FloatRect getGlobalBounds() const override;
    };
 
    template<typename MANIFEST>
    class RadioButtonWith : public RadioButton, public Customizable<MANIFEST>
    { public: using RadioButton::RadioButton; };
 
} // namespace ml
 
#endif // MALENA_RADIOBUTTON_H