[VDG] [Fluent] Allow Coinjoins to be expanded in the TreeDataGrid

WalletWasabi.Fluent/ViewModels/Wallets/Home/History/HistoryItems/CoinJoinHistoryItemViewModel.cs

@@ -0,0 +1,47 @@
+using System.Collections.Generic;
+using System.Linq;
+using System.Reactive;
+using NBitcoin;
+using ReactiveUI;
+using WalletWasabi.Blockchain.Transactions;
+using WalletWasabi.Fluent.Extensions;
+using WalletWasabi.Fluent.ViewModels.Navigation;
+
+namespace WalletWasabi.Fluent.ViewModels.Wallets.Home.History.HistoryItems;
+
+public class CoinJoinHistoryItemViewModel : HistoryItemViewModelBase
+{
+	public CoinJoinHistoryItemViewModel(
+		int orderIndex,
+		TransactionSummary transactionSummary,
+		WalletViewModel walletViewModel,
+		Money balance,
+		IObservable<Unit> updateTrigger)
+		: base(orderIndex, transactionSummary)
+	{
+		Label = transactionSummary.Label.Take(1).FirstOrDefault();
+		FilteredLabel = transactionSummary.Label.Skip(1).ToList();
+		IsConfirmed = transactionSummary.IsConfirmed();
+		Date = transactionSummary.DateTime.ToLocalTime();
+		Balance = balance;
+		IsCoinJoin = true;
+
+		var amount = transactionSummary.Amount;
+		if (amount < Money.Zero)
+		{
+			OutgoingAmount = amount * -1;
+		}
+		else
+		{
+			IncomingAmount = amount;
+		}
+
+		ShowDetailsCommand = ReactiveCommand.Create(() =>
+			RoutableViewModel.Navigate(NavigationTarget.DialogScreen).To(
+				new TransactionDetailsViewModel(transactionSummary, walletViewModel.Wallet, updateTrigger)));
+
+		DateString = $"{Date.ToLocalTime():MM/dd/yy HH:mm}";
+	}
+
+	public bool IsCoinJoinTransaction => true;
+}

WalletWasabi.Fluent/ViewModels/Wallets/Home/History/HistoryItems/CoinJoinsHistoryItemViewModel.cs

@@ -1,6 +1,8 @@
 using System.Collections.Generic;
+using System.Collections.ObjectModel;
 using System.Collections.Immutable;
 using System.Linq;
+using System.Reactive;
 using NBitcoin;
 using ReactiveUI;
 using WalletWasabi.Blockchain.Transactions;
@@ -11,9 +13,19 @@ namespace WalletWasabi.Fluent.ViewModels.Wallets.Home.History.HistoryItems;
 
 public class CoinJoinsHistoryItemViewModel : HistoryItemViewModelBase
 {
-	public CoinJoinsHistoryItemViewModel(int orderIndex, TransactionSummary firstItem)
+	private readonly WalletViewModel _walletViewModel;
+	private readonly IObservable<Unit> _updateTrigger;
+
+	public CoinJoinsHistoryItemViewModel(
+		int orderIndex,
+		TransactionSummary firstItem,
+		WalletViewModel walletViewModel,
+		IObservable<Unit> updateTrigger)
 		: base(orderIndex, firstItem)
 	{
+		_walletViewModel = walletViewModel;
+		_updateTrigger = updateTrigger;
+
 		CoinJoinTransactions = new List<TransactionSummary>();
 		Label = "Coinjoins";
 		FilteredLabel = new List<string>();
@@ -26,6 +38,31 @@ public CoinJoinsHistoryItemViewModel(int orderIndex, TransactionSummary firstIte
 
 	public List<TransactionSummary> CoinJoinTransactions { get; private set; }
 
+	protected override ObservableCollection<HistoryItemViewModelBase> LoadChildren()
+	{
+		var result = new ObservableCollection<HistoryItemViewModelBase>();
+
+		var balance = Balance ?? Money.Zero;
+
+		for (var i = 0; i < CoinJoinTransactions.Count; i++)
+		{
+			var item = CoinJoinTransactions[i];
+
+			var transaction = new CoinJoinHistoryItemViewModel(
+				i,
+				item,
+				_walletViewModel,
+				balance,
+				_updateTrigger);
+
+			balance -= item.Amount;
+
+			result.Add(transaction);
+		}
+
+		return result;
+	}
+
 	public void Add(TransactionSummary item)
 	{
 		if (!item.IsOwnCoinjoin)

WalletWasabi.Fluent/ViewModels/Wallets/Home/History/HistoryItems/HistoryItemViewModelBase.cs

@@ -1,4 +1,5 @@
 using System.Collections.Generic;
+using System.Collections.ObjectModel;
 using System.Reactive.Linq;
 using System.Threading.Tasks;
 using System.Windows.Input;
@@ -16,6 +17,8 @@ public abstract partial class HistoryItemViewModelBase : ViewModelBase
 	[AutoNotify] private DateTimeOffset _date;
 	[AutoNotify] private string _dateString = "";
 	[AutoNotify] private bool _isConfirmed;
+	[AutoNotify] private bool _isExpanded;
+	private ObservableCollection<HistoryItemViewModelBase>? _children;
 
 	protected HistoryItemViewModelBase(int orderIndex, TransactionSummary transactionSummary)
 	{
@@ -39,6 +42,8 @@ protected HistoryItemViewModelBase(int orderIndex, TransactionSummary transactio
 
 	public bool IsCoinJoin { get; protected set; }
 
+	public IReadOnlyList<HistoryItemViewModelBase> Children => _children ??= LoadChildren();
+
 	public Money? Balance { get; protected set; }
 
 	public Money? OutgoingAmount { get; protected set; }
@@ -47,6 +52,11 @@ protected HistoryItemViewModelBase(int orderIndex, TransactionSummary transactio
 
 	public ICommand? ShowDetailsCommand { get; protected set; }
 
+	protected virtual ObservableCollection<HistoryItemViewModelBase> LoadChildren()
+	{
+		throw new NotSupportedException();
+	}
+
 	public static Comparison<HistoryItemViewModelBase?> SortAscending<T>(Func<HistoryItemViewModelBase, T> selector)
 	{
 		return (x, y) =>

WalletWasabi.Fluent/ViewModels/Wallets/Home/History/HistoryViewModel.cs

@@ -66,11 +66,12 @@ public HistoryViewModel(WalletViewModel walletViewModel, IObservable<Unit> updat
 		// Outgoing			OutgoingColumnView			Outgoing (BTC)	Auto		130				150			true
 		// Balance			BalanceColumnView			Balance (BTC)		Auto		130				150			true
 
-		Source = new FlatTreeDataGridSource<HistoryItemViewModelBase>(_transactions)
+		Source = new HierarchicalTreeDataGridSource<HistoryItemViewModelBase>(_transactions)
 		{
 			Columns =
 			{
 				// Indicators
+				new HierarchicalExpanderColumn<HistoryItemViewModelBase>(
 				new TemplateColumn<HistoryItemViewModelBase>(
 					null,
 					new FuncDataTemplate<HistoryItemViewModelBase>((node, ns) => new IndicatorsColumnView(), true),
@@ -83,6 +84,18 @@ public HistoryViewModel(WalletViewModel walletViewModel, IObservable<Unit> updat
 						MinWidth = new GridLength(80, GridUnitType.Pixel)
 					},
 					width: new GridLength(0, GridUnitType.Auto)),
+				x => x.Children,
+				x =>
+				{
+					if (x is CoinJoinsHistoryItemViewModel coinJoinsHistoryItemViewModel
+					    && coinJoinsHistoryItemViewModel.CoinJoinTransactions.Count > 1)
+					{
+						return true;
+					}
+
+					return false;
+				},
+				x => x.IsExpanded),
 
 				// Date
 				new PrivacyTextColumn<HistoryItemViewModelBase>(
@@ -172,7 +185,7 @@ public HistoryViewModel(WalletViewModel walletViewModel, IObservable<Unit> updat
 
 	public ObservableCollection<HistoryItemViewModelBase> Transactions => _transactions;
 
-	public FlatTreeDataGridSource<HistoryItemViewModelBase> Source { get; }
+	public HierarchicalTreeDataGridSource<HistoryItemViewModelBase> Source { get; }
 
 	public void SelectTransaction(uint256 txid)
 	{
@@ -250,7 +263,7 @@ private IEnumerable<HistoryItemViewModelBase> GenerateHistoryList(List<Transacti
 			{
 				if (coinJoinGroup is null)
 				{
-					coinJoinGroup = new CoinJoinsHistoryItemViewModel(i, item);
+					coinJoinGroup = new CoinJoinsHistoryItemViewModel(i, item, _walletViewModel, _updateTrigger);
 				}
 				else
 				{

WalletWasabi.Fluent/Views/Wallets/Home/History/HistoryTable.axaml

@@ -62,7 +62,9 @@
                   <TreeDataGridCellsPresenter Name="PART_CellsPresenter"
                                               ElementFactory="{TemplateBinding ElementFactory}"
                                               Items="{TemplateBinding Columns}"
-                                              Rows="{TemplateBinding Rows}"/>
+                                              Rows="{TemplateBinding Rows}"
+                                              Classes.coinJoinTransaction="{Binding IsCoinJoinTransaction}"
+                                              x:CompileBindings="False"/>
                 </Panel>
               </DockPanel>
             </ControlTemplate>
@@ -100,6 +102,15 @@
         <Style Selector="TreeDataGridRow:selected /template/ TreeDataGridCellsPresenter#PART_CellsPresenter">
           <Setter Property="Background" Value="Transparent" />
         </Style>
+        <Style Selector="TreeDataGridRow /template/ TreeDataGridCellsPresenter#PART_CellsPresenter.coinJoinTransaction">
+          <Setter Property="Background" Value="{DynamicResource SystemListLowColor}"/>
+        </Style>
+        <Style Selector="TreeDataGridRow:selected /template/ TreeDataGridCellsPresenter#PART_CellsPresenter.coinJoinTransaction">
+          <Setter Property="Background" Value="Transparent"/>
+        </Style>
+        <Style Selector="TreeDataGridRow:pointerover /template/ TreeDataGridCellsPresenter#PART_CellsPresenter.coinJoinTransaction">
+          <Setter Property="Background" Value="Transparent"/>
+        </Style>
         <Style Selector="TextBlock.hidden">
           <Setter Property="IsVisible" Value="False" />
         </Style>
@@ -118,6 +129,28 @@
             </i:BehaviorCollectionTemplate>
           </Setter>
         </Style>
+
+        <Style Selector="TreeDataGridExpanderCell">
+          <Setter Property="Template">
+            <ControlTemplate>
+              <Border Background="{TemplateBinding Background}"
+                      Padding="0">
+                <DockPanel>
+                  <Border DockPanel.Dock="Left"
+                          Margin="4 0"
+                          Width="12" Height="12">
+                    <ToggleButton Classes="ExpandCollapseChevron"
+                                  Focusable="False"
+                                  IsChecked="{TemplateBinding IsExpanded, Mode=TwoWay}"
+                                  IsVisible="{TemplateBinding ShowExpander}"/>
+                  </Border>
+                  <Decorator Name="PART_Content"/>
+                </DockPanel>
+              </Border>
+            </ControlTemplate>
+          </Setter>
+        </Style>
+
         <Style Selector="behaviors|TreeDataGridItemDetailsAdorner">
           <Setter Property="Margin" Value="-31,0,0,0" />
           <Setter Property="HorizontalAlignment" Value="Left" />