Add Material.Avalonia.TreeDataGrid project with TreeDataGrid styles

Directory.Packages.props

@@ -12,6 +12,7 @@
     <PackageVersion Include="Avalonia" Version="$(AvaloniaVersion)" />
     <PackageVersion Include="Avalonia.Diagnostics" Version="$(AvaloniaVersion)" />
     <PackageVersion Include="Avalonia.Controls.DataGrid" Version="$(AvaloniaVersion)" />
+    <PackageVersion Include="Avalonia.Controls.TreeDataGrid" Version="11.1.0" />
     <PackageVersion Include="Avalonia.Controls.ItemsRepeater" Version="11.0.9" />
     <PackageVersion Include="Avalonia.Desktop" Version="$(AvaloniaVersion)" />
     <PackageVersion Include="Avalonia.Themes.Simple" Version="$(AvaloniaVersion)" />
@@ -33,4 +34,4 @@
     <!--For _build-->
     <PackageVersion Include="Microsoft.SourceLink.GitHub" Version="8.0.0" />
   </ItemGroup>
-</Project>
+</Project>

Material.Avalonia.TreeDataGrid/Converters/TreeDataGridSourceColumnAlignmentToDockConverter.cs

@@ -0,0 +1,28 @@
+using System;
+using System.Collections.Generic;
+using System.Globalization;
+using Avalonia.Controls;
+using Avalonia.Data.Converters;
+using Avalonia.Media;
+
+namespace Material.Avalonia.TreeDataGrid.Converters;
+
+public sealed class TreeDataGridSourceColumnAlignmentToDockConverter : IMultiValueConverter
+{
+    public object? Convert(IList<object?> values, Type targetType, object? parameter, CultureInfo culture)
+    {
+        if (values[0] is not ITreeDataGridSource source ||
+            values[1] is not int columnIndex || 
+            columnIndex < 0 || 
+            columnIndex >= source.Columns.Count)
+            return Dock.Left;
+
+        var column = source.Columns[columnIndex];
+        var align  = TextColumnAlignmentProvider.GetTextAlignment(column);
+
+        return align == TextAlignment.Right ? Dock.Right : Dock.Left;
+    }
+
+    public object[] ConvertBack(object? value, Type[] targetTypes, object? parameter, CultureInfo culture)
+        => throw new NotSupportedException();
+}

Material.Avalonia.TreeDataGrid/Material.Avalonia.TreeDataGrid.csproj

@@ -0,0 +1,30 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <Description>TreeDataGrid styles library of Material.Avalonia.</Description>
+    <PackageTags>avalonia xaml material design theme treedatagrid colour color ui ux material-design google-material</PackageTags>
+    <PackageIcon>FavIcon.png</PackageIcon>
+
+    <TargetFrameworks>net8.0</TargetFrameworks>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <None Include="../wiki/FavIcon.png" Pack="true" PackagePath="/" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Avalonia.Controls.TreeDataGrid" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\Material.Avalonia\Material.Avalonia.csproj"/>
+  </ItemGroup>
+
+  <ItemGroup>
+    <Content Include="*.props">
+      <Pack>true</Pack>
+      <PackagePath>build\;buildTransitive\</PackagePath>
+    </Content>
+  </ItemGroup>
+
+</Project>

Material.Avalonia.TreeDataGrid/Material.Avalonia.TreeDataGrid.props

@@ -0,0 +1,7 @@
+<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup>
+    <RuntimeHostConfigurationOption Include="MaterialThemeIncludeTreeDataGrid" Value="true"/>
+    <!--To exclude this library from trimming-->
+    <TrimmerRootAssembly Include="Material.Avalonia.TreeDataGrid" RootMode="library"/>
+  </ItemGroup>
+</Project>

Material.Avalonia.TreeDataGrid/MaterialTreeDataGridStyles.axaml

@@ -0,0 +1,12 @@
+<treeDataGrid:MaterialTreeDataGridStyles xmlns="https://github.com/avaloniaui"
+                                 xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+                                 xmlns:treeDataGrid="clr-namespace:Material.Avalonia.TreeDataGrid"
+                                 x:Class="Material.Avalonia.TreeDataGrid.MaterialTreeDataGridStyles">
+  <treeDataGrid:MaterialTreeDataGridStyles.Resources>
+    <ResourceDictionary>
+      <ResourceDictionary.MergedDictionaries>
+        <ResourceInclude Source="avares://Material.Avalonia.TreeDataGrid/TreeDataGrid.axaml" />
+      </ResourceDictionary.MergedDictionaries>
+    </ResourceDictionary>
+  </treeDataGrid:MaterialTreeDataGridStyles.Resources>
+</treeDataGrid:MaterialTreeDataGridStyles>

Material.Avalonia.TreeDataGrid/MaterialTreeDataGridStyles.axaml.cs

@@ -0,0 +1,4 @@
+namespace Material.Avalonia.TreeDataGrid;
+
+public class MaterialTreeDataGridStyles : global::Avalonia.Styling.Styles {
+}

Material.Avalonia.TreeDataGrid/TextColumnAlignmentProvider.cs

@@ -0,0 +1,40 @@
+using System;
+using System.Collections.Concurrent;
+using System.Diagnostics.CodeAnalysis;
+using System.Reflection;
+using Avalonia.Controls.Models.TreeDataGrid;
+using Avalonia.Media;
+
+namespace Material.Avalonia.TreeDataGrid;
+
+internal static class TextColumnAlignmentProvider
+{
+    private static readonly ConcurrentDictionary<Type, Func<object, TextAlignment?>> _cache = new();
+
+    public static TextAlignment? GetTextAlignment(object column)
+    {
+        ArgumentNullException.ThrowIfNull(column);
+
+        var colType = column.GetType();
+        if (!colType.IsGenericType
+            || colType.GetGenericTypeDefinition() != typeof(TextColumn<,>))
+            return null;
+
+        var getter = _cache.GetOrAdd(colType, BuildGetter);
+        return getter(column);
+    }
+
+    [UnconditionalSuppressMessage("AOT", "IL3050:Calling members annotated with 'RequiresDynamicCodeAttribute' may break functionality when AOT compiling.", Justification = "<Pending>")]
+    private static Func<object, TextAlignment?> BuildGetter(Type closedColumnType)
+    {
+        var helperMethod = typeof(TextColumnHelper)
+            .GetMethod(nameof(TextColumnHelper.GetTextAlignmentGeneric),
+                BindingFlags.Static | BindingFlags.NonPublic | BindingFlags.Public)!;
+
+        var genArgs = closedColumnType.GetGenericArguments();
+        var closedMethod = helperMethod.MakeGenericMethod(genArgs);
+
+        return (Func<object, TextAlignment?>)closedMethod
+            .CreateDelegate(typeof(Func<object, TextAlignment?>));
+    }
+}

Material.Avalonia.TreeDataGrid/TextColumnHelper.cs

@@ -0,0 +1,14 @@
+using Avalonia.Controls.Models.TreeDataGrid;
+using Avalonia.Media;
+
+namespace Material.Avalonia.TreeDataGrid;
+
+internal static class TextColumnHelper
+{
+    public static TextAlignment? GetTextAlignmentGeneric<TModel, TValue>(object column)
+        where TModel : class
+    {
+        var typed = (TextColumn<TModel, TValue>)column;
+        return typed.Options.TextAlignment;
+    }
+}