Merge pull request #14759 from unoplatform/mergify/bp/release/stable/…

…5.0/pr-14737

x:Bind to event in `ResourceDictionary` (backport #14737)

src/SourceGenerators/Uno.UI.SourceGenerators/XamlGenerator/XamlFileGenerator.cs

@@ -355,6 +355,7 @@ private SourceText InnerGenerateFile()
 			if (topLevelControl.Type.Name == "ResourceDictionary")
 			{
 				_isTopLevelDictionary = true;
+				_xClassName = FindClassName(topLevelControl);
 
 				using (TrySetDefaultBindMode(topLevelControl))
 				{

src/Uno.UI.Tests/App/App.xaml

@@ -6,6 +6,7 @@
 			 xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
 			 xmlns:views="using:Uno.UI.Tests.App.Views"
 			 xmlns:local="using:Uno.UI.Tests.App.Xaml"
+             xmlns:xbind="using:Uno.UI.Tests.Windows_UI_Xaml_Data.xBindTests.Controls"
 			 mc:Ignorable="not_win">
 	<Application.Resources>
 		<ResourceDictionary>
@@ -31,6 +32,7 @@
 				</ResourceDictionary>
 				<local:Subclassed_Dictionary />
 				<local:Subclassed_Dictionary_With_Property Test="Test123"/>
+                <xbind:XBind_ResourceDictionary />
 			</ResourceDictionary.MergedDictionaries>
 			<ResourceDictionary.ThemeDictionaries>
 				<ResourceDictionary x:Key="Light">

src/Uno.UI.Tests/Windows_UI_Xaml_Data/xBindTests/Controls/XBind_ResourceDictionary.xaml

@@ -0,0 +1,30 @@
+<ResourceDictionary
+    x:Class="Uno.UI.Tests.Windows_UI_Xaml_Data.xBindTests.Controls.XBind_ResourceDictionary"
+    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns:controls="using:Uno.UI.Tests.Windows_UI_Xaml_Data.xBindTests.Controls">
+
+    <!--  Implicitly applied default style  -->
+    <Style BasedOn="{StaticResource DefaultxBindProjectTemplateStyle}" TargetType="controls:XBind_ResourceDictionary_Control" />
+
+    <Style x:Key="DefaultxBindProjectTemplateStyle" TargetType="controls:XBind_ResourceDictionary_Control">
+        <Style.Setters>
+            <Setter Property="Template">
+                <Setter.Value>
+                    <ControlTemplate TargetType="controls:XBind_ResourceDictionary_Control">
+                        <ContentControl
+                            x:Name="ContentContainer"
+                            HorizontalContentAlignment="Stretch"
+                            VerticalContentAlignment="Stretch">
+                            <ContentControl.ContentTemplate>
+                                <DataTemplate x:DataType="controls:XBind_ResourceDictionary_Control">
+                                    <Button Content="Hello" Loaded="{x:Bind Element_Loaded}" />
+                                </DataTemplate>
+                            </ContentControl.ContentTemplate>
+                        </ContentControl>
+                    </ControlTemplate>
+                </Setter.Value>
+            </Setter>
+        </Style.Setters>
+    </Style>
+</ResourceDictionary>

src/Uno.UI.Tests/Windows_UI_Xaml_Data/xBindTests/Controls/XBind_ResourceDictionary.xaml.cs

@@ -0,0 +1,23 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Runtime.InteropServices.WindowsRuntime;
+using Windows.Foundation;
+using Windows.Foundation.Collections;
+using Windows.UI.Xaml;
+using Windows.UI.Xaml.Controls;
+using Windows.UI.Xaml.Controls.Primitives;
+using Windows.UI.Xaml.Data;
+using Windows.UI.Xaml.Input;
+using Windows.UI.Xaml.Media;
+using Windows.UI.Xaml.Navigation;
+
+namespace Uno.UI.Tests.Windows_UI_Xaml_Data.xBindTests.Controls;
+public sealed partial class XBind_ResourceDictionary : ResourceDictionary
+{
+	public XBind_ResourceDictionary()
+	{
+		this.InitializeComponent();
+	}
+}

src/Uno.UI.Tests/Windows_UI_Xaml_Data/xBindTests/Controls/XBind_ResourceDictionary_Control.cs

@@ -0,0 +1,30 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Windows.UI.Xaml;
+using Windows.UI.Xaml.Controls;
+
+namespace Uno.UI.Tests.Windows_UI_Xaml_Data.xBindTests.Controls;
+
+internal class XBind_ResourceDictionary_Control : Control
+{
+	/// <summary>
+	/// Creates a new instance of the <see cref="ProjectTemplate_xBind"/> class.
+	/// </summary>
+	public XBind_ResourceDictionary_Control()
+	{
+		this.DefaultStyleKey = typeof(XBind_ResourceDictionary_Control);
+
+		// Allows directly using this control as the x:DataType in the template.
+		this.DataContext = this;
+	}
+
+	public bool ElementLoadedInvoked { get; private set; }
+
+	public void Element_Loaded(object sender, RoutedEventArgs args)
+	{
+		ElementLoadedInvoked = true;
+	}
+}

src/Uno.UI.Tests/Windows_UI_Xaml_Data/xBindTests/Given_xBind_Binding.cs

@@ -1461,6 +1461,15 @@ public void When_Indexer_Then_Property_Access_Update_Collection_Element()
 			Assert.AreEqual("Updated2", SUT.tbDict2.Text);
 		}
 
+		[TestMethod]
+		public void When_XBind_In_ResourceDictionary()
+		{
+			var SUT = new XBind_ResourceDictionary_Control();
+			SUT.ForceLoaded();
+
+			Assert.IsTrue(SUT.ElementLoadedInvoked);
+		}
+
 		private async Task AssertIsNullAsync<T>(Func<T> getter, TimeSpan? timeout = null) where T : class
 		{
 			timeout ??= TimeSpan.FromSeconds(1);