Fix for "System.ArgumentException: Unable to find IAnimationManager f…

…or ... (this control)"
Keflon · Feb 2, 2024 · 703cded · 703cded
1 parent 68edd35
commit 703cded
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Showing 3 changed files with 25 additions and 3 deletions.
diff --git a/FunctionZero.Maui.Controls/Controls/Expander/ExpanderZero.xaml.cs b/FunctionZero.Maui.Controls/Controls/Expander/ExpanderZero.xaml.cs
@@ -8,9 +8,29 @@ namespace FunctionZero.Maui.Controls;
 public partial class ExpanderZero : ContentView
 {
     private ContentPresenter _detailView;
+    private bool _loaded;
+
     public ExpanderZero()
     {
         InitializeComponent();
+        this.Loaded += ExpanderZero_Loaded;
+    }
+
+
+
+    private void ExpanderZero_Loaded(object sender, EventArgs e)
+    {
+        // This dodges something related to this: https://github.com/dotnet/maui/pull/6364
+        // where
+        // IsExpanded="{z:Bind '!Device.IsDeviceConnected'}"
+        // can cause
+        // System.ArgumentException: Unable to find IAnimationManager for ... (this control)
+        // I guess because z:Bind flips the value when the binding context is set but before the control 
+        // is in the visual tree, meaning there is no IAnimationManager available.
+        // Note, my logic may be incorrect, but the problem we're dodging is specific to the '!' in the zBind expression.
+
+        _loaded = true;
+        UpdateVisualState(IsExpanded);
     }
 
     public static readonly BindableProperty OrientationProperty = BindableProperty.Create(nameof(Orientation), typeof(StackOrientation), typeof(ExpanderZero), StackOrientation.Vertical, BindingMode.OneWay, null, OrientationChanged);
@@ -130,6 +150,8 @@ protected override async void OnApplyTemplate()
     }
     private void UpdateVisualState(bool isExpanded)
     {
+        if(_loaded == false)
+            return;
 
         ContentPresenter container = _detailView;
         _detailView.IsClippedToBounds = true;

diff --git a/FunctionZero.Maui.Controls/FunctionZero.Maui.Controls.csproj b/FunctionZero.Maui.Controls/FunctionZero.Maui.Controls.csproj
@@ -25,11 +25,11 @@
 		<PackageProjectUrl>https://github.com/Keflon/FunctionZero.Maui.Controls</PackageProjectUrl>
 		<RepositoryUrl>https://github.com/Keflon/FunctionZero.Maui.Controls</RepositoryUrl>
 		<PackageTags>MAUI; ListView; ListViewZero; TreeView; TreeViewZero; MaskView; iOS; WinUI; Windows; Android; Control </PackageTags>
-		<PackageReleaseNotes>Working out some kinks with the MarkupExtension for swapping language translations at runtime.</PackageReleaseNotes>
+		<PackageReleaseNotes>Dodging MAUI bug: 'Unable to find IAnimationManager ...' if IsExpanded flips before the Expander is presented.</PackageReleaseNotes>
 		<PackageLicenseFile>License.md</PackageLicenseFile>
 		<IncludeSymbols>True</IncludeSymbols>
 		<SymbolPackageFormat>snupkg</SymbolPackageFormat>
-		<Version>8.0.0.2-pre4</Version>
+		<Version>8.0.0.2-pre5</Version>
 		<PackageIcon>F0 gravatar.png</PackageIcon>
 	</PropertyGroup>
 

diff --git a/SampleApp/SampleApp.csproj b/SampleApp/SampleApp.csproj
@@ -55,7 +55,7 @@
 	<ItemGroup>
 		<PackageReference Include="Microsoft.Maui.Controls" Version="$(MauiVersion)" />
 		<PackageReference Include="Microsoft.Maui.Controls.Compatibility" Version="$(MauiVersion)" />
-		<PackageReference Include="FunctionZero.Maui.MvvmZero" Version="2.0.3" />
+		<PackageReference Include="FunctionZero.Maui.MvvmZero" Version="8.0.0" />
 	</ItemGroup>
 
 	<ItemGroup>