Ma classe Button !

//-- HEADER :
#pragma once

#include <functional>

namespace ml {

    class Button {

        public :

            using OnClickedCallback = std::function<void()>;

            Button();
             ~Button();

            const NzBoxf& GetBounds() const;
            const NzFont& GetFont() const;
            const NzString& GetText() const;
            const NzColor& GetColor() const;
            const NzColor& GetDefaultColor() const;
            unsigned int GetCharacterSize() const;

            void OnMouseMoved(const NzVector2f& mouse);
            void OnMousePressed(const NzVector2f& mouse, NzMouse::Button button);

            void SetMousePressedCallback(OnClickedCallback callback);

            void SetFont(NzFontRef font);
            void SetText(const NzString& text);
            void SetTextColor(const NzColor& color);
            void SetDefaultTextColor(const NzColor& color);
            void SetCharaceterSize(unsgined int characterSize);

            void Register(NzScene& scene);

        private :

            OnClickedCallback m_clickedCallback;

            NzSimpleDrawer m_drawer;
            NzTextSprite *m_text;

            NzColor m_defaultColor;

     };
}

// -- SOURCE :

#include "Button.h"

namespace ml {
    Button::Button() : m_text(nullptr) { m_drawer.SetCharacterSize(45); }
    Button::~Button() {}

    const NzBoxf& Button::GetBounds() const { return m_text->GetBoundingVolume().aabb; }
    const NzFont& Button::GetFont() const { return m_drawer.GetFont(); }
    const NzString& Button::GetText() const { return m_drawer.GetText(); }
    const NzColor& Button::GetColor() const { return m_drawer.GetColor(); }
    const NzColor& Button::GetColor() const { return m_defaultColor; }
    unsigned int Button::GetCharacterSize() const { return m_drawer.GetCharacterSize(); }

    void Button::OnMouseMoved(const NzVector2f& mouse) {
        if (GetBounds().contains(mouse)) {
            NzColor newColor(GetColor());
            newColor.r /= 1.5;
            newColor.g /= 1.5;
            newColor.b /= 1.5;
            SetTextColor(newColor);
        } else
            SetTextColor(m_defaultColor);

    }
    void Button::OnMousePressed(const NzVector2f& mouse, NzMouse::Button button) {
        if (m_clickedCallback) {
            if (GetBounds().contains(mouse) && button == NzMouse::Left)
                m_clickedCallback();
        }
    }

    void Button::SetMousePressedCallback(OnClickedCallback callback) { if (callback) m_clickedCallback =  callback; }

    void Button::SetFont(NzFontRef font) { m_drawer.SetFont(std::move(font)); }
    void Button::SetText(const NzString& text) { m_drawer.SetText(text); }
    void Button::SetTextColor(const NzColor& color) { m_drawer.SetColor(color); }
    void Button::SetDefaultColor(const NzColor& color) { m_defaultColor = color; SetTextColor(color); }
    void Button::SetCharaceterSize(unsigned int characterSize) { m_drawer.SetCharacterSize(characterSize); }

    void Button::Register(NzScene& scene) { m_text  = scene.CreateNode<NzTextSprite>(); }
}