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 "toolbar_widget.hpp"
#include "system_menu_widget.hpp"
#include "grid_widget.hpp"
#include "window_traffic_lights_widget.hpp"
#include "../label.hpp"
 
namespace hi { inline namespace v1 {
 
class window_widget final : public widget
{
public:
    using super = widget;
 
    observer<label> title;
 
    window_widget(forward_of<observer<label>> auto&& title) noexcept :
        super(nullptr), title(hi_forward(title))
    {
        _toolbar = std::make_unique<toolbar_widget>(this);
 
        if (operating_system::current == operating_system::windows) {
#if HI_OPERATING_SYSTEM == HI_OS_WINDOWS
            _system_menu = &_toolbar->make_widget<system_menu_widget>();
            this->_system_menu->icon = this->title.get<"icon">();
#endif
            _toolbar->make_widget<window_traffic_lights_widget, horizontal_alignment::right>();
        } else if (operating_system::current == operating_system::macos) {
            _toolbar->make_widget<window_traffic_lights_widget>();
        } else {
            hi_no_default();
        }
 
        _content = std::make_unique<grid_widget>(this);
    }
 
    [[nodiscard]] color background_color() noexcept;
 
    [[nodiscard]] grid_widget& content() noexcept;
 
    [[nodiscard]] toolbar_widget& toolbar() noexcept;
 
    [[nodiscard]] generator<widget_intf&> children(bool include_invisible) noexcept override;
    [[nodiscard]] box_constraints update_constraints() noexcept override;
    void set_layout(widget_layout const& context) noexcept override;
    void draw(draw_context const& context) noexcept override;
    [[nodiscard]] hitbox hitbox_test(point2 position) const noexcept override;
    bool handle_event(gui_event const& event) noexcept override;
    bool process_event(gui_event const& event) const noexcept override;
    void set_window(gui_window *window) noexcept override;
    [[nodiscard]] gui_window *window() const noexcept override;
private:
    gui_window *_window = nullptr;
 
    std::unique_ptr<grid_widget> _content;
    box_constraints _content_constraints;
    box_shape _content_shape;
 
    std::unique_ptr<toolbar_widget> _toolbar;
    box_constraints _toolbar_constraints;
    box_shape _toolbar_shape;
 
    mutable bool _can_resize_width;
    mutable bool _can_resize_height;
 
#if HI_OPERATING_SYSTEM == HI_OS_WINDOWS
    system_menu_widget *_system_menu = nullptr;
#endif
};
 
}} // namespace hi::v1