Merge branch 'main' into winui

# Conflicts:
#	Microsoft.Toolkit.Uwp.SampleApp/Microsoft.Toolkit.Uwp.SampleApp.csproj
#	Microsoft.Toolkit.Uwp.SampleApp/Properties/AssemblyInfo.cs

Author: azchohfi

.github/PULL_REQUEST_TEMPLATE.md

@@ -6,7 +6,7 @@
 
 ## Fixes
 
-<!-- Add the relevant issue number after the word "Fixes" mentioned above (for ex: "## Fixes #1234") which will automatically close the issue once the PR is merged. -->
+<!-- Add the relevant issue number after the word "Fixes" mentioned above (for ex: `## Fixes #0000`) which will automatically close the issue once the PR is merged. -->
 
 <!-- Add a brief overview here of the feature/bug & fix. -->
 

CommunityToolkit.WinUI.SampleApp/SamplePages/ListDetailsView/ListDetailsView.bind

@@ -16,13 +16,13 @@
                 <DataTemplate>
                     <StackPanel Margin="0,8">
                         <TextBlock Text="{Binding From}"
-                                   Style="{ThemeResource SubtitleTextBlockStyle}"/>
+                                   Style="{StaticResource SubtitleTextBlockStyle}"/>
                         <TextBlock Text="{Binding Subject}"
-                                   Style="{ThemeResource BodyTextBlockStyle}"
+                                   Style="{StaticResource BodyTextBlockStyle}"
                                    Foreground="{ThemeResource Brush-Blue-01}"
                                    MaxLines="1"/>
                         <TextBlock Text="{Binding Body}"
-                                   Style="{ThemeResource BodyTextBlockStyle}"
+                                   Style="{StaticResource BodyTextBlockStyle}"
                                    Opacity=".6"
                                    MaxLines="1"/>
                     </StackPanel>
@@ -37,17 +37,17 @@
                                                Height="50"
                                                CornerRadius="999"/>
                         <TextBlock Text="{Binding From}"
-                                   Style="{ThemeResource SubtitleTextBlockStyle}"
+                                   Style="{StaticResource SubtitleTextBlockStyle}"
                                    RelativePanel.RightOf="FromEllipse"
                                    Margin="12,-6,0,0"/>
                         <TextBlock x:Name="SubjectLine"
                                    Text="{Binding Subject}"
-                                   Style="{ThemeResource BodyTextBlockStyle}"
+                                   Style="{StaticResource BodyTextBlockStyle}"
                                    RelativePanel.Below="FromEllipse"
                                    Margin="0,12,0,0"/>
                         <TextBlock x:Name="Body"
                                    Text="{Binding Body}"
-                                   Style="{ThemeResource BodyTextBlockStyle}"
+                                   Style="{StaticResource BodyTextBlockStyle}"
                                    TextWrapping="Wrap"
                                    RelativePanel.Below="SubjectLine"
                                    Margin="0,12,0,0"/>

CommunityToolkit.WinUI.SampleApp/landingPageLinks.json

@@ -1,6 +1,6 @@
 {
   "new-section-title": "What's New",
-  "new-samples": [ "MVVM Toolkit", "EffectAnimations", "TabbedCommandBar", "ColorPicker", "ColorPickerButton", "SwitchPresenter" ],
+  "new-samples": [ "AttachedCardShadow (Win2D)", "Shadow Animations", "RichSuggestBox", "MetadataControl", "ConstrainedBox", "ControlSizeTrigger" ],
   "resources": [
     {
       "title": "Toolkit",

CommunityToolkit.WinUI.UI.Animations/Xaml/Abstract/ShadowAnimation{TValue,TKeyFrame}.cs

@@ -54,18 +54,22 @@ public AnimationBuilder AppendToBuilder(AnimationBuilder builder, UIElement pare
             {
                 static AnimationBuilder ThrowArgumentNullException()
                 {
-                    throw new ArgumentNullException(
-                        "The target shadow cannot be animated at this time.");
+                    throw new ArgumentNullException("The target shadow cannot be animated at this time.");
                 }
 
                 return ThrowArgumentNullException();
             }
 
             if (Target is IAttachedShadow allShadows)
             {
-                // in this case we'll animate all the shadows being used.
+                // In this case we'll animate all the shadows being used
                 foreach (var context in allShadows.EnumerateElementContexts()) //// TODO: Find better way!!!
                 {
+                    if (context.Shadow is not DropShadow shadow)
+                    {
+                        continue;
+                    }
+
                     NormalizedKeyFrameAnimationBuilder<TKeyFrame>.Composition keyFrameBuilder = new(
                         explicitTarget,
                         Delay ?? delayHint ?? DefaultDelay,
@@ -75,25 +79,18 @@ static AnimationBuilder ThrowArgumentNullException()
 
                     AppendToBuilder(keyFrameBuilder, easingTypeHint, easingModeHint);
 
-                    CompositionAnimation animation = keyFrameBuilder.GetAnimation(context.Shadow, out _);
+                    CompositionAnimation animation = keyFrameBuilder.GetAnimation(shadow, out _);
 
-                    builder.ExternalAnimation(context.Shadow, animation);
+                    builder.ExternalAnimation(shadow, animation);
                 }
 
                 return builder;
             }
-            else
+            else if (Effects.GetShadow((FrameworkElement)parent) is AttachedShadowBase shadowBase &&
+                     shadowBase.GetElementContext((FrameworkElement)parent).Shadow is DropShadow shadow)
             {
-                var shadowBase = Effects.GetShadow(parent as FrameworkElement);
-                if (shadowBase == null)
-                {
-                    static AnimationBuilder ThrowArgumentNullException() => throw new ArgumentNullException("The target's shadow is null, make sure to set the Target property to an element with a Shadow");
-
-                    return ThrowArgumentNullException();
-                }
-
-                var shadow = shadowBase.GetElementContext((FrameworkElement)parent).Shadow;
-
+                // In this case, the animation is targeting the single shadow attached to the target element.
+                // The same checks as before have been performed to ensure that unloading doesn't cause issues.
                 NormalizedKeyFrameAnimationBuilder<TKeyFrame>.Composition keyFrameBuilder = new(
                     explicitTarget,
                     Delay ?? delayHint ?? DefaultDelay,
@@ -107,6 +104,8 @@ static AnimationBuilder ThrowArgumentNullException()
 
                 return builder.ExternalAnimation(shadow, animation);
             }
+
+            return builder;
         }
     }
 }

CommunityToolkit.WinUI/Extensions/DispatcherQueueTimerExtensions.cs

@@ -27,7 +27,7 @@ public static class DispatcherQueueTimerExtensions
         /// <param name="immediate">Determines if the action execute on the leading edge instead of trailing edge.</param>
         /// <example>
         /// <code>
-        /// private DispatcherQueueTimer _typeTimer = new DispatcherQueueTimer();
+        /// private DispatcherQueueTimer _typeTimer = DispatcherQueue.GetForCurrentThread().CreateTimer();
         ///
         /// _typeTimer.Debounce(async () =>
         ///     {