tree_view.h

//
// tree_view.h - tree view widget interface
//
// lecui user interface library, part of the liblec library
// Copyright (c) 2019 Alec Musasa (alecmus at live dot com)
//
// Released under the MIT license. For full details see the
// file LICENSE.txt
//
 
#pragma once
 
#if defined(LECUI_EXPORTS)
#include "widget.h"
#else
#include <liblec/lecui/widgets/widget.h>
#endif
 
namespace liblec {
    namespace lecui {
        namespace widgets {
            class lecui_api tree_view : public widget {
            public:
                class node {
                public:
                    std::string name;
 
                    bool expand = false;
 
                    std::map<std::string, node> children;
 
                    node(std::string name) :
                        name(name) {}
 
                private:
                    // Default constructor not allowed
                    node() {}
 
                    bool selected = false;
                    lecui::rect rc = { 0.f, 0.f, 0.f, 0.f };
                    lecui::rect rc_expand = { 0.f, 0.f, 0.f, 0.f };
 
#if defined(LECUI_EXPORTS)
                    friend class widgets::tree_view_impl;
#endif
                };
 
            private:
                float _border = .5f;
                color _color_border;
                float _corner_radius_x = 5.f;
                float _corner_radius_y = 5.f;
                std::map<std::string, node> _root;
                void* _p_special_pane_specs = nullptr;
 
            public:
                tree_view() {
                    _rect.size({ 200.f, 200.f });
                }
 
                static node& insert_node(std::map<std::string, node>& root,
                    std::string name) {
                    root.insert(std::make_pair(name, node(name)));
                    return root.at(name);
                }
 
                struct tree_view_events : basic_events {
                    std::function<void(node& n)> selection;
                };
 
                tree_view_events& events() {
                    return _tree_events;
                }
 
                bool operator==(const tree_view& param);
 
                bool operator!=(const tree_view& param);
 
                tree_view& operator=(const tree_view& param);
 
                tree_view(const tree_view& param);
 
                // generic widget
 
                std::string& text() override;
 
                tree_view& text(const std::string& text);
 
                std::string& tooltip() override;
 
                tree_view& tooltip(const std::string& tooltip);
 
                lecui::rect& rect() override;
 
                tree_view& rect(const lecui::rect& rect);
 
                resize_params& on_resize() override;
 
                tree_view& on_resize(const resize_params& on_resize);
 
                cursor_type& cursor() override;
 
                tree_view& cursor(const cursor_type cursor);
 
                std::string& font() override;
 
                tree_view& font(const std::string& font);
 
                float& font_size() override;
 
                tree_view& font_size(const float& font_size);
 
                color& color_text() override;
 
                tree_view& color_text(const color& color_text);
 
                color& color_fill() override;
 
                tree_view& color_fill(const color& color_fill);
 
                color& color_hot() override;
 
                tree_view& color_hot(const color& color_hot);
 
                color& color_selected() override;
 
                tree_view& color_selected(const color& color_selected);
 
                color& color_disabled() override;
 
                tree_view& color_disabled(const color& color_disabled);
 
                // widget specific widget
 
                float& border();
 
                tree_view& border(const float& border);
 
                color& color_border();
 
                tree_view& color_border(const color& color_border);
 
                float& corner_radius_x();
 
                tree_view& corner_radius_x(const float& corner_radius_x);
 
                float& corner_radius_y();
 
                tree_view& corner_radius_y(const float& corner_radius_y);
 
                std::map<std::string, node>& root();
 
                tree_view& root(const std::map<std::string, node>& root);
 
            public:
                [[nodiscard]]
                static tree_view& add(containers::page& page, const std::string& alias = std::string());
 
                [[nodiscard]]
                static tree_view& get(form& fm, const std::string& path);
 
            private:
                tree_view_events _tree_events;
 
#if defined(LECUI_EXPORTS)
                friend class form;
#endif
            };
        }
    }
}
 
#if defined(lecui_helper)
#define get_tree_view(path) liblec::lecui::widgets::tree_view::get(*this, path)
#endif