123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254 |
- using System;
- using System.Collections.Generic;
- using System.Collections.ObjectModel;
- using System.ComponentModel;
- using System.Linq;
- using System.Linq.Expressions;
- namespace InABox.Core
- {
- public interface ICoreTreeNode
- {
- object? ID { get; set; }
- object? Parent { get; set; }
- object? Image { get; set; }
- CoreRow? Row { get; set; }
- object? this[string column] { get; set; }
- string Number { get; }
- }
- public class CoreTreeNode<TKey> : INotifyPropertyChanged, ICoreTreeNode
- {
- private CoreTreeNodes<TKey> _owner;
-
- public ObservableCollection<CoreTreeNode<TKey>> Children => new ObservableCollection<CoreTreeNode<TKey>>(_owner.GetChildrenOfParent(_id));
- object? ICoreTreeNode.ID
- {
- get => ID;
- set => ID = (TKey)value!;
- }
-
- private TKey _id;
- public TKey ID
- {
- get { return _id; }
- set
- {
- _id = value;
- RaisedOnPropertyChanged("ID");
- }
- }
-
- object? ICoreTreeNode.Parent
- {
- get => Parent;
- set => Parent = (TKey)value!;
- }
-
- private TKey _parent;
- public TKey Parent
- {
- get { return _parent; }
- set
- {
- _parent = value;
- RaisedOnPropertyChanged("Parent");
- }
- }
-
- private object? _image;
- public object? Image
- {
- get => _image;
- set
- {
- _image = value;
- RaisedOnPropertyChanged("Image");
- }
- }
- private CoreRow _row;
- public CoreRow Row
- {
- get => _row;
- set
- {
- _row = value;
- RaisedOnPropertyChanged("Row");
- RaisedOnPropertyChanged("Item[]");
- }
- }
- public object? this[string column]
- {
- get => Row[column];
- set
- {
- Row[column] = value;
- _owner.DoColumnChanged(this, column);
- }
- }
- public event PropertyChangedEventHandler? PropertyChanged;
- public void RaisedOnPropertyChanged(string propertyName)
- {
- PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
- }
- public CoreTreeNode(CoreTreeNodes<TKey> owner, CoreRow row)
- {
- _owner = owner;
- _row = row;
- }
- public CoreTreeNode(CoreTreeNodes<TKey> owner, TKey id, TKey parent, CoreRow row) : this(owner, row)
- {
- _id = id;
- _parent = parent;
- }
- public CoreTreeNode<TKey>? GetParent() => _owner[_parent];
- public int Index()
- {
- var parent = GetParent();
- return parent != null
- ? parent.Children.IndexOf(this) + 1
- : _owner.Nodes.IndexOf(this) + 1;
- }
- public void InvalidateData()
- {
- RaisedOnPropertyChanged("Row");
- RaisedOnPropertyChanged("Item[]");
- }
- public String Number
- {
- get
- {
- String result = Index().ToString();
- var parent = GetParent();
- while (parent != null)
- {
- int index = parent.Index();
- result = $"{index}.{result}";
- parent = parent.GetParent();
- }
- return result;
- }
- }
-
- public int Depth()
- {
- var result = 0;
- foreach (var child in Children)
- result = Math.Max(result, child.Depth());
- return 1 + result;
- }
-
- }
- public class CoreTreeNodes<TKey>
- {
- private List<CoreTreeNode<TKey>> _nodes;
- private Dictionary<TKey, CoreTreeNode<TKey>> _nodeMap;
-
- public TKey DefaultKey { get; set; }
- public ObservableCollection<CoreTreeNode<TKey>> Nodes { get; } = new ObservableCollection<CoreTreeNode<TKey>>();
- public CoreTreeNode<TKey>? this[TKey id] => _nodeMap.GetValueOrDefault(id);
-
- public CoreTreeNodes(TKey defaultKey)
- {
- _nodes = new List<CoreTreeNode<TKey>>();
- _nodeMap = new Dictionary<TKey, CoreTreeNode<TKey>>();
- DefaultKey = defaultKey;
- }
- public CoreTreeNode<TKey> Add(TKey id, TKey parent, CoreRow row)
- {
- var node = new CoreTreeNode<TKey>(this, id, parent, row);
- _nodes.Add(node);
- _nodeMap[id] = node;
- if(Equals(node.Parent, DefaultKey))
- {
- Nodes.Add(node);
- }
- return node;
- }
- public void Clear()
- {
- _nodes.Clear();
- _nodeMap.Clear();
- Nodes.Clear();
- }
- public CoreTreeNode<TKey> Find(TKey id) => _nodeMap.GetValueOrDefault(id);
- public CoreTreeNode<TKey>? Find(CoreRow row) => _nodes.FirstOrDefault(x => x.Row == row);
- /// <summary>
- /// Gets a given node and recursively all its children given by <paramref name="id"/>.
- /// </summary>
- /// <param name="id"></param>
- /// <returns></returns>
- public IEnumerable<CoreTreeNode<TKey>> GetChildren(TKey id)
- {
- if(!_nodeMap.TryGetValue(id, out var node))
- {
- yield break;
- }
- yield return node;
- var children = GetChildrenOfParent(id);
- foreach (var child in children)
- foreach (var item in GetChildren(child.ID))
- yield return item;
- }
-
- /// <summary>
- /// Get all the direct children of the parent given by <paramref name="id"/>.
- /// </summary>
- /// <param name="id"></param>
- /// <returns></returns>
- public IEnumerable<CoreTreeNode<TKey>> GetChildrenOfParent(TKey id)
- {
- return _nodes.Where(x => object.Equals(x.Parent, id) && !object.Equals(x.ID, id));
- }
- public void Load<T>(CoreTable table, Expression<Func<T, TKey>> id, Expression<Func<T, TKey>> parentid)
- {
- _nodes.Clear();
- foreach (var row in table.Rows)
- {
- var _id = row.Get(id);
- var _parent = row.Get(parentid);
- Add(_id, _parent, row);
- }
- }
-
- public delegate void ColumnChangedEventHandler(CoreTreeNode<TKey> node, string column);
- public event ColumnChangedEventHandler? ColumnChanged;
- internal void DoColumnChanged(CoreTreeNode<TKey> node, string column)
- {
- ColumnChanged?.Invoke(node, column);
- }
- public int Depth()
- {
- var result = 0;
- var roots = Nodes.Where(x => Equals(DefaultKey, x.Parent));
- foreach (var root in roots)
- result = Math.Max(result, root.Depth());
- return result;
- }
-
- }
- }
|