#pragma once
#include <QString>
#include <functional>
#include <stack>
#include <utility>
#include <vector>
namespace Flex_Qt {
class Tree_Node {
public:
    explicit Tree_Node();
    // 判断状态
    int index();
    bool is_root();
    bool is_leaf();
    bool is_first();
    bool is_last();
    Tree_Node* previous();
    Tree_Node* next();
    Tree_Node* last_child();
    Tree_Node* first_child();
    Tree_Node* root();
    int get_deep();
    // 遍历值
    std::vector<Tree_Node*> deep_traversed();
    std::vector<Tree_Node*> sequence_traversed();
    std::vector<Tree_Node*> descendants();
    Tree_Node* par = nullptr;
    std::vector<Tree_Node*> sons;
    QString text;
    bool expand = true;
    int height = 20;
    void add_child(Tree_Node* child) {
        sons.push_back(child);
        child->par = this;
    }
};
struct Tree_Pos {
    Tree_Node* p{};
    int depth{};
    int node_pos{};
    int offset{};
    int pos() {
        return node_pos + offset;
    }
    std::stack<std::pair<Tree_Node*, int>> rest;
};
class Tree_Model {
public:
    std::vector<Tree_Node*> roots;
    int tab_pixel_size = 8;
    int png_len = 20;
    int tab_width = 10;
    int space = 4;
    int height();
    int width() {
        return 1000;
    }
};
Tree_Pos get_pos(int pos, const std::vector<Tree_Node*>& roots, int space);
std::vector<Tree_Node*> deep_traversed(const std::vector<Tree_Node*>& nodes);
using Node_Call_Back = const std::function<void(Tree_Node*, int, int)>&;
void select_node(const std::vector<Tree_Node*>& roots, int view_y, int length, int space, Node_Call_Back call_back);
}