project-kyoku/src/gui/widgets/widget.h

#pragma once

#include <vector>
#include <memory>
#include <SFML/Window/Event.hpp>
#include <SFML/Graphics/Drawable.hpp>
#include <SFML/Graphics/RenderTarget.hpp>

class Widget : public sf::Drawable, public std::enable_shared_from_this<Widget>
{
public:
    virtual ~Widget() = default;

    virtual void input(const sf::Event& event) = 0;
    virtual void update(const sf::Time& dt) = 0;
    virtual void draw(sf::RenderTarget& target, sf::RenderStates states) const = 0;
    virtual void move(const sf::Vector2f& delta) = 0;
    virtual bool isUnderMouse(int mouse_x, int mouse_y) const = 0;

    virtual void setRect(const sf::FloatRect& rect) = 0;
    virtual sf::FloatRect rect() const = 0;

    virtual void setPosition(const sf::Vector2f& position) = 0;
    virtual sf::Vector2f position() const = 0;

    virtual void setVisibility(bool is_visible = true);
    bool isVisible() const;

    void addChild(const std::shared_ptr<Widget>& child);
    void setParent(const std::shared_ptr<Widget>& parent);

    void blockBy(const std::shared_ptr<Widget>& blocker);
    void unblock();

protected:
    std::vector<std::shared_ptr<Widget>> _children;
    std::shared_ptr<Widget> _parent;
    std::shared_ptr<Widget> _blocker;
    bool _is_visible = true;
};