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BeWo/View/Controls/TextModuleTreeViewControl.xaml.cs

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+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Linq;
+using System.Runtime.CompilerServices;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Controls.Primitives;
+using System.Windows.Input;
+
+using BeWo.Annotations;
+using BeWo.ViewModel;
+
+using BS.Shared.Core;
+using BS.Shared.Extensions;
+
+
+namespace BeWo.View.Controls
+{
+	public partial class TextModuleTreeViewControl : INotifyPropertyChanged
+	{
+		public event EventHandler<EventArgs<TextModuleVM>> TextModuleSelected;
+
+		public TextModuleTreeViewControl()
+		{
+			InitializeComponent();
+			DataContext = this;
+		}
+
+		public long? ServiceCategoryOid { get; set; }
+
+		private List<TextModuleVM> allTextModules = new List<TextModuleVM>();
+
+		public BindingList<TextModuleVM> FilteredList { get; set; }
+
+		private void OpenPopUpBtnClick(object sender, RoutedEventArgs e)
+		{
+			VMFactory.CreateTextModuleListVMAsync(
+				textModules => this.Dispatch(delegate
+				{
+					TreeViewPopup.Placement = PlacementMode.RelativePoint;
+					TreeViewPopup.HorizontalOffset = 0;
+					TreeViewPopup.IsOpen = true;
+
+					allTextModules = textModules.VMList.ToList();
+
+					if(ServiceCategoryOid != null)
+					{
+						FilteredList = new BindingList<TextModuleVM>();
+
+						var preFilteredTextModules = textModules.VMList.Where(w => w.ServiceCategory != null && w.ServiceCategory.ServiceCategoryOid == ServiceCategoryOid || w.ServiceCategory == null && !w.IsParent).ToList();
+
+						FilteredList.AddRange(preFilteredTextModules);
+						SearchTextModulesRecursively(preFilteredTextModules);
+					}
+					else
+					{
+						FilteredList = new BindingList<TextModuleVM>(textModules.VMList);
+					}
+					
+					allTextModules = FilteredList.ToList();
+					OnPropertyChanged(nameof(FilteredList));
+				}));
+		}
+
+		private void TreeListControl_OnPreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
+		{
+			var selectedTextModule = (TextModuleVM) TreeListControl.SelectedItem;
+
+			if(selectedTextModule.IsParent)
+			{
+				return;
+			}
+
+			TreeViewPopup.IsOpen = false;
+
+			TextModuleSelected?.Invoke(this, new EventArgs<TextModuleVM>(selectedTextModule));
+		}
+
+		private void SearchTextBox_OnTextChanged(object sender, TextChangedEventArgs e)
+		{
+			var searchText = ((TextBox) sender).Text.Trim();
+			FilteredList.Clear();
+
+			if(searchText.IsNullOrEmpty())
+			{
+				FilteredList = new BindingList<TextModuleVM>(allTextModules.ToList());
+			}
+			else
+			{
+				var matchingChildren = allTextModules.Where(w => w.Name.Contains(searchText) || w.Text != null && w.Text.Contains(searchText)).ToList();
+
+				FilteredList.AddRange(matchingChildren);
+				SearchTextModulesRecursively(matchingChildren);
+			}
+
+			OnPropertyChanged(nameof(FilteredList));
+			TreeListControl.RefreshData();
+		}
+
+		private void SearchTextModulesRecursively(IReadOnlyCollection<TextModuleVM> pChildren)
+		{
+			if(pChildren.Count == 0)
+			{
+				return;
+			}
+
+			foreach(var child in pChildren)
+			{
+				var parents = allTextModules.Where(w => Equals(child.Parent, w) && !FilteredList.Contains(w)).ToList();
+
+				FilteredList.AddRange(parents);
+				SearchTextModulesRecursively(parents);
+			}
+		}
+
+		public event PropertyChangedEventHandler PropertyChanged;
+
+		[NotifyPropertyChangedInvocator]
+		protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = null)
+		{
+			PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
+		}
+	}
+}