label_widget.hpp

// Copyright Take Vos 2020-2021.
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt)
 
#pragma once
 
#include "widget.hpp"
#include "text_widget.hpp"
#include "icon_widget.hpp"
#include "../alignment.hpp"
#include "../label.hpp"
#include <memory>
#include <string>
#include <array>
#include <optional>
#include <future>
 
namespace hi::inline v1 {
 
class label_widget final : public widget {
public:
    using super = widget;
 
    observable<label> label;
 
    observable<alignment> alignment = hi::alignment::top_right();
 
    observable<semantic_text_style> text_style = semantic_text_style::label;
 
    template<typename Label, typename Alignment = hi::alignment, typename TextStyle = hi::semantic_text_style>
    label_widget(
        gui_window &window,
        widget *parent,
        Label &&label,
        Alignment &&alignment = hi::alignment::top_right(),
        TextStyle &&text_style = semantic_text_style::label) noexcept :
        label_widget(window, parent)
    {
        this->label = std::forward<Label>(label);
        this->alignment = std::forward<Alignment>(alignment);
        this->text_style = std::forward<TextStyle>(text_style);
    }
 
    [[nodiscard]] generator<widget *> children() const noexcept override
    {
        co_yield _icon_widget.get();
        co_yield _text_widget.get();
    }
 
    widget_constraints const &set_constraints() noexcept override;
    void set_layout(widget_layout const &layout) noexcept override;
    void draw(draw_context const &context) noexcept;
    [[nodiscard]] hitbox hitbox_test(point3 position) const noexcept;
private:
    float _icon_size;
    float _inner_margin;
 
    decltype(label)::token_type _label_cbt;
    decltype(text_style)::token_type _text_style_cbt;
 
    aarectangle _icon_rectangle;
    widget_constraints _icon_constraints;
    std::unique_ptr<icon_widget> _icon_widget;
    aarectangle _text_rectangle;
    widget_constraints _text_constraints;
    std::unique_ptr<text_widget> _text_widget;
 
    label_widget(gui_window &window, widget *parent) noexcept;
};
 
} // namespace hi::inline v1