Luna/libui/include/ui/Container.h

/**
 * @file Container.h
 * @author apio (cloudapio.eu)
 * @brief A container widget to pad and align objects inside it.
 *
 * @copyright Copyright (c) 2023, the Luna authors.
 *
 */

#pragma once
#include <os/File.h>
#include <ui/Alignment.h>
#include <ui/Widget.h>
#include <ui/Window.h>

namespace ui
{
    class Container : public Widget
    {
      public:
        Container(ui::Window* window, ui::Widget* parent);

        void set_container_settings(VerticalAlignment valign, HorizontalAlignment halign)
        {
            m_valign = valign;
            m_halign = halign;
        }

        template <typename T> Result<T*> create_child_widget()
        {
            auto* widget = TRY(make<T>(window(), this));
            m_widget = widget;
            window()->recalculate_layout();
            return widget;
        }

        Result<EventResult> handle_mouse_move(Point position) override;
        Result<EventResult> handle_mouse_leave() override;
        Result<EventResult> handle_mouse_down(Point position, int buttons) override;
        Result<EventResult> handle_mouse_up(Point position, int buttons) override;
        Result<EventResult> handle_key_event(const ui::KeyEventRequest& request) override;
        Result<void> draw(Canvas& canvas) override;

        void recalculate_true_rects() override;
        void recalculate_pseudo_rects() override;

        void show_tree(int indent) override
        {
            os::println("%*s- ui::Container (%d,%d,%d,%d)", indent, "", m_rect.pos.x, m_rect.pos.y, m_rect.width,
                        m_rect.height);
            if (m_widget) m_widget->show_tree(indent + 1);
        }

      private:
        Widget* m_widget { nullptr };
        VerticalAlignment m_valign = VerticalAlignment::Center;
        HorizontalAlignment m_halign = HorizontalAlignment::Center;
    };
}