window_widget.hpp

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// Copyright Take Vos 2020-2022.
// 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 "../geometry/axis.hpp"
#include "../label.hpp"
 
namespace hi { inline namespace v1 {
class toolbar_widget;
class grid_widget;
 
template<typename Context>
concept window_widget_attribute = forward_of<Context, observer<hi::label>>;
 
class window_widget final : public widget {
public:
    using super = widget;
 
    observer<label> title;
 
    window_widget(gui_window *window, window_widget_attribute auto&&...attributes) noexcept : window_widget(window)
    {
        set_attributes(hi_forward(attributes)...);
    }
 
    [[nodiscard]] color background_color() noexcept;
 
    [[nodiscard]] grid_widget& content() noexcept;
 
    [[nodiscard]] toolbar_widget& toolbar() noexcept;
 
    [[nodiscard]] axis resize_axis() const noexcept
    {
        auto r = axis::none;
        if (_constraints.minimum.width() != _constraints.maximum.width()) {
            r |= axis::width;
        }
        if (_constraints.minimum.height() != _constraints.maximum.height()) {
            r |= axis::height;
        }
        return r;
    }
 
    [[nodiscard]] generator<widget *> children() const noexcept override;
    widget_constraints const& set_constraints(set_constraints_context const& context) noexcept override;
    void set_layout(widget_layout const& context) noexcept;
    void draw(draw_context const& context) noexcept override;
    [[nodiscard]] hitbox hitbox_test(point3 position) const noexcept override;
    bool handle_event(gui_event const& event) noexcept override;
    bool process_event(gui_event const& event) const noexcept override;
private:
    gui_window *_window;
 
    aarectangle _content_rectangle;
    std::unique_ptr<grid_widget> _content;
 
    aarectangle _toolbar_rectangle;
    std::unique_ptr<toolbar_widget> _toolbar;
 
    window_widget(gui_window *window) noexcept;
 
    void set_attributes() noexcept {}
    void set_attributes(window_widget_attribute auto&& first, window_widget_attribute auto&&...rest) noexcept
    {
        if constexpr (forward_of<decltype(first), observer<hi::label>>) {
            title = hi_forward(first);
        } else {
            hi_static_no_default();
        }
 
        set_attributes(hi_forward(rest)...);
    }
};
 
}} // namespace hi::v1