bwidgets/inc/basic_widgets/w/base/layout.hpp

#ifndef BWIDGETS_LAYOUT_HPP_
#define BWIDGETS_LAYOUT_HPP_

#include <functional>
#include <vector>

#include <basic_widgets/core/type/size.hpp>
#include <basic_widgets/w/base/widget.hpp>

namespace bwidgets::core {
    struct Renderer;
}

namespace bwidgets::widget
{
    class Layout : public Widget
    {
        protected:
            std::vector<Widget*> _widgets;

            virtual void _handle_geometry_change(const SDL_Rect&) noexcept override;
            virtual void _handle_renderer_change(core::Renderer*) override;
            virtual void _handle_rendering() override;
            virtual void _update_layout(const SDL_Rect&) noexcept = 0;

        public:
            core::Size margins {8, 8};

            virtual ~Layout() noexcept;

            virtual Layout* add_widget(Widget*);
            virtual void    for_widgets(std::function<void (Widget*)>);
            virtual Layout* handle_event(const SDL_Event&) override;

            virtual core::Size size() const noexcept override = 0;
    };
}

#endif