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[Binding SG] Dogfood binding source generator in the MAUI codebase #23393

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merged 9 commits into from
Jul 23, 2024
Merged

[Binding SG] Dogfood binding source generator in the MAUI codebase #23393

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478f5e4
Use the SetBinding SG wherever possible in Controls Core
simonrozsival Jul 2, 2024
649f39d
Use the SetBinding SG wherever possible in Controls Core UnitTests
simonrozsival Jul 2, 2024
756232c
Use the SetBinding SG wherever possible in Compatibility Core Android
simonrozsival Jul 2, 2024
5da2611
Add workaround for XamlPreCompile with interceptors for Windows builds
simonrozsival Jul 2, 2024
b4d5927
Merge branch 'net9.0' of https://github.com/dotnet/maui into use-bind…
simonrozsival Jul 3, 2024
7a23a77
Generate file-scoped attribute class in each generated source output
simonrozsival Jul 3, 2024
794a0e0
Remove explicit restore and build targets in ExecuteBuildUITestApp
simonrozsival Jul 4, 2024
6cdeb1b
Merge branch 'net9.0' of https://github.com/dotnet/maui into use-bind…
simonrozsival Jul 19, 2024
deed704
Fix integration test
simonrozsival Jul 19, 2024
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1 change: 0 additions & 1 deletion eng/devices/catalyst.cake
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Expand Up @@ -173,7 +173,6 @@ void ExecuteBuildUITestApp(string appProject, string binDir, string config, stri
Framework = tfm,
ToolPath = toolPath,
ArgumentCustomization = args => args
.Append("/t:Restore;Build")
.Append($"/bl:{binlog}")
});

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2 changes: 1 addition & 1 deletion src/Compatibility/Core/src/Android/Renderers/ListViewAdapter.cs
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Expand Up @@ -738,7 +738,7 @@ Cell GetNewGroupHeaderCell(ITemplatedItemsList<Cell> group)
groupHeaderCell = new TextCell();
groupHeaderCell.SetBinding(
TextCell.TextProperty,
TypedBinding.ForSingleNestingLevel(nameof(group.Name), static (ITemplatedItemsList<Cell> g) => g.Name));
static (ITemplatedItemsList<Cell> g) => g.Name);
groupHeaderCell.BindingContext = group;
}

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12 changes: 12 additions & 0 deletions src/Compatibility/Core/src/Compatibility.csproj
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Expand Up @@ -52,6 +52,18 @@
<ItemGroup Condition="$(TargetFramework.Contains('-windows')) == true ">
</ItemGroup>

<PropertyGroup>
<InterceptorsPreviewNamespaces>$(InterceptorsPreviewNamespaces);Microsoft.Maui.Controls.Generated</InterceptorsPreviewNamespaces>
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So, if an interceptor is declared outside of a namespace listed here, it will get a C# compiler error.

It sounds like they will rename this to $(InterceptorsNamespaces) one day:

No problem here, just fyi for later.

<!-- https://github.com/dotnet/msbuild/issues/9785 -->
<CompilerResponseFile Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'windows'">$(CompilerResponseFile);WorkaroundXamlPreCompilePreviewFeatures.rsp</CompilerResponseFile>
</PropertyGroup>
<ItemGroup>
<ProjectReference
Include="..\..\..\Controls\src\BindingSourceGen\Controls.BindingSourceGen.csproj"
OutputItemType="Analyzer"
ReferenceOutputAssembly="false" />
</ItemGroup>

<ItemGroup Condition=" '$(TargetPlatformIdentifier)' == 'android' ">
<AndroidResource Include="$(AndroidRoot)Resources\layout\Tabbar.axml" />
<AndroidResource Include="$(AndroidRoot)Resources\layout\Toolbar.axml" />
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1 change: 1 addition & 0 deletions src/Compatibility/Core/src/WorkaroundXamlPreCompilePreviewFeatures.rsp
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@@ -0,0 +1 @@
/features:"InterceptorsPreviewNamespaces=Microsoft.Maui.Controls.Generated"
44 changes: 22 additions & 22 deletions src/Controls/src/BindingSourceGen/BindingCodeWriter.cs
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Expand Up @@ -18,28 +18,6 @@ public static string GenerateCommonCode() => $$"""
//------------------------------------------------------------------------------
#nullable enable

namespace System.Runtime.CompilerServices
{
using System;
using System.CodeDom.Compiler;

{{GeneratedCodeAttribute}}
[AttributeUsage(AttributeTargets.Method, AllowMultiple = true)]
internal sealed class InterceptsLocationAttribute : Attribute
{
public InterceptsLocationAttribute(string filePath, int line, int column)
{
FilePath = filePath;
Line = line;
Column = column;
}

public string FilePath { get; }
public int Line { get; }
public int Column { get; }
}
}

namespace Microsoft.Maui.Controls.Generated
{
using System.CodeDom.Compiler;
Expand Down Expand Up @@ -73,6 +51,28 @@ private static string GenerateBindingCode(string bindingMethodBody) => $$"""
//------------------------------------------------------------------------------
#nullable enable

namespace System.Runtime.CompilerServices
{
using System;
using System.CodeDom.Compiler;

{{GeneratedCodeAttribute}}
[AttributeUsage(AttributeTargets.Method, AllowMultiple = true)]
file sealed class InterceptsLocationAttribute : Attribute
{
public InterceptsLocationAttribute(string filePath, int line, int column)
{
FilePath = filePath;
Line = line;
Column = column;
}

public string FilePath { get; }
public int Line { get; }
public int Column { get; }
}
}

Comment on lines +54 to +75
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This might seem like a weird change but we need to make the attribute file-scoped so that there aren't any collisions when there are assemblies with reference between them and they see each others internals (as in the case of Microsoft.Maui.Controls.Core.dll and Microsoft.Maui.Controls.Compatibility.dll

namespace Microsoft.Maui.Controls.Generated
{
using System;
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4 changes: 1 addition & 3 deletions src/Controls/src/Core/Compatibility/Handlers/ListView/Android/ListViewAdapter.cs
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Expand Up @@ -763,9 +763,7 @@ Cell GetNewGroupHeaderCell(ITemplatedItemsList<Cell> group)
else
{
groupHeaderCell = new TextCell();
groupHeaderCell.SetBinding(
TextCell.TextProperty,
TypedBinding.ForSingleNestingLevel(nameof(group.Name), static (ITemplatedItemsList<Cell> g) => g.Name));
groupHeaderCell.SetBinding(TextCell.TextProperty, static (ITemplatedItemsList<Cell> g) => g.Name);
groupHeaderCell.BindingContext = group;
}

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44 changes: 17 additions & 27 deletions src/Controls/src/Core/Compatibility/Handlers/ListView/Tizen/CellContentFactory.cs
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Expand Up @@ -74,8 +74,8 @@ static View CreateContent(SectionCell sectionCell)
#pragma warning restore CS0612 // Type or member is obsolete
};

text.SetBinding(Label.TextProperty, TypedBinding.ForSingleNestingLevel("Text", static (SectionCell cell) => cell.Text, source: sectionCell));
text.SetBinding(Label.TextColorProperty, TypedBinding.ForSingleNestingLevel("TextColor", static (SectionCell cell) => cell.TextColor, source: sectionCell));
text.SetBinding(Label.TextProperty, static (SectionCell cell) => cell.Text, source: sectionCell);
text.SetBinding(Label.TextColorProperty, static (SectionCell cell) => cell.TextColor, source: sectionCell);

var layout = new Controls.StackLayout
{
Expand All @@ -93,15 +93,15 @@ static View CreateContent(SectionCell sectionCell)
static View CreateContent(TextCell textcell)
{
var text = new Label();
text.SetBinding(Label.TextProperty, TypedBinding.ForSingleNestingLevel("Text", static (TextCell cell) => cell.Text, source: textcell));
text.SetBinding(Label.TextColorProperty, TypedBinding.ForSingleNestingLevel("TextColor", static (TextCell cell) => cell.TextColor, source: textcell));
text.SetBinding(Label.TextProperty, static (TextCell cell) => cell.Text, source: textcell);
text.SetBinding(Label.TextColorProperty, static (TextCell cell) => cell.TextColor, source: textcell);
#pragma warning disable CS0612 // Type or member is obsolete
text.FontSize = Device.GetNamedSize(NamedSize.Default, typeof(Label));
#pragma warning restore CS0612 // Type or member is obsolete

var detail = new Label();
detail.SetBinding(Label.TextProperty, TypedBinding.ForSingleNestingLevel("Detail", static (TextCell cell) => cell.Detail, source: textcell));
detail.SetBinding(Label.TextColorProperty, TypedBinding.ForSingleNestingLevel("DetailColor", static (TextCell cell) => cell.DetailColor, source: textcell));
detail.SetBinding(Label.TextProperty, static (TextCell cell) => cell.Detail, source: textcell);
detail.SetBinding(Label.TextColorProperty, static (TextCell cell) => cell.DetailColor, source: textcell);
#pragma warning disable CS0612 // Type or member is obsolete
detail.FontSize = Device.GetNamedSize(NamedSize.Micro, typeof(Label));
#pragma warning restore CS0612 // Type or member is obsolete
Expand Down Expand Up @@ -139,7 +139,7 @@ static View CreateContent(ImageCell imageCell)
{
Aspect = Aspect.AspectFit,
};
img.SetBinding(Image.SourceProperty, TypedBinding.ForSingleNestingLevel("ImageSource", static (ImageCell cell) => cell.ImageSource, source: imageCell));
img.SetBinding(Image.SourceProperty, static (ImageCell cell) => cell.ImageSource, source: imageCell);
layout.Add(img, 0, 0);
layout.Add(textcell, 1, 0);
return layout;
Expand All @@ -148,20 +148,15 @@ static View CreateContent(ImageCell imageCell)
static View CreateContent(EntryCell entryCell)
{
var entry = new Entry();
entry.SetBinding(Entry.TextProperty,
TypedBinding.ForSingleNestingLevel("Text",
static (EntryCell cell) => cell.Text,
static (cell, value) => cell.Text = value,
mode: BindingMode.TwoWay,
source: entryCell));
entry.SetBinding(Entry.PlaceholderProperty, TypedBinding.ForSingleNestingLevel("Placeholder", static (EntryCell cell) => cell.Placeholder, source: entryCell));
entry.SetBinding(InputView.KeyboardProperty, TypedBinding.ForSingleNestingLevel("Keyboard", static (EntryCell cell) => cell.Keyboard, source: entryCell));
entry.SetBinding(Entry.HorizontalTextAlignmentProperty, TypedBinding.ForSingleNestingLevel("HorizontalTextAlignment", static (EntryCell cell) => cell.HorizontalTextAlignment, source: entryCell));
entry.SetBinding(Entry.VerticalTextAlignmentProperty, TypedBinding.ForSingleNestingLevel("VerticalTextAlignment", static (EntryCell cell) => cell.VerticalTextAlignment, source: entryCell));
entry.SetBinding(Entry.TextProperty, static (EntryCell cell) => cell.Text, mode: BindingMode.TwoWay, source: entryCell);
entry.SetBinding(Entry.PlaceholderProperty, static (EntryCell cell) => cell.Placeholder, source: entryCell);
entry.SetBinding(InputView.KeyboardProperty, static (EntryCell cell) => cell.Keyboard, source: entryCell);
entry.SetBinding(Entry.HorizontalTextAlignmentProperty, static (EntryCell cell) => cell.HorizontalTextAlignment, source: entryCell);
entry.SetBinding(Entry.VerticalTextAlignmentProperty, static (EntryCell cell) => cell.VerticalTextAlignment, source: entryCell);

var label = new Label();
label.SetBinding(Label.TextProperty, TypedBinding.ForSingleNestingLevel("Label", static (EntryCell cell) => cell.Label, source: entryCell));
label.SetBinding(Label.TextColorProperty, TypedBinding.ForSingleNestingLevel("LabelColor", static (EntryCell cell) => cell.LabelColor, source: entryCell));
label.SetBinding(Label.TextProperty, static (EntryCell cell) => cell.Label, source: entryCell);
label.SetBinding(Label.TextColorProperty, static (EntryCell cell) => cell.LabelColor, source: entryCell);
#pragma warning disable CS0612 // Type or member is obsolete
label.FontSize = Device.GetNamedSize(NamedSize.Micro, typeof(Label));
#pragma warning restore CS0612 // Type or member is obsolete
Expand All @@ -188,19 +183,14 @@ static View CreateContent(SwitchCell switchCell)
HorizontalOptions = LayoutOptions.StartAndExpand,
};
#pragma warning restore CS0618
text.SetBinding(Label.TextProperty, TypedBinding.ForSingleNestingLevel("Text", static (SwitchCell cell) => cell.Text, source: switchCell));
text.SetBinding(Label.TextProperty, static (SwitchCell cell) => cell.Text, source: switchCell);

var sw = new Switch
{
HorizontalOptions = LayoutOptions.End
};
sw.SetBinding(Switch.IsToggledProperty,
TypedBinding.ForSingleNestingLevel("On",
static (SwitchCell cell) => cell.On,
static (cell, value) => cell.On = value,
mode: BindingMode.TwoWay,
source: switchCell));
sw.SetBinding(Switch.OnColorProperty, TypedBinding.ForSingleNestingLevel("OnColor", static (SwitchCell cell) => cell.OnColor, source: switchCell));
sw.SetBinding(Switch.IsToggledProperty, static (SwitchCell cell) => cell.On, mode: BindingMode.TwoWay, source: switchCell);
sw.SetBinding(Switch.OnColorProperty, static (SwitchCell cell) => cell.OnColor, source: switchCell);

var layout = new Controls.StackLayout
{
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2 changes: 1 addition & 1 deletion src/Controls/src/Core/Compatibility/Handlers/ListView/Tizen/ListViewRenderer.cs
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Expand Up @@ -98,7 +98,7 @@ protected void UpdateAdaptor(bool initialize)
template = new CellWrapperTemplate(new DataTemplate(() =>
{
var label = new TextCell();
label.SetBinding(TextCell.TextProperty, TypedBinding.ForSingleNestingLevel(string.Empty, static (object source) => source));
label.SetBinding(TextCell.TextProperty, static (object source) => source);
return label;
}), Element);
}
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2 changes: 1 addition & 1 deletion src/Controls/src/Core/Compatibility/Handlers/Shell/iOS/ShellSearchResultsRenderer.cs
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Expand Up @@ -55,7 +55,7 @@ DataTemplate DefaultTemplate
}
#pragma warning restore CS0618

label.SetBinding(Label.TextProperty, TypedBinding.ForSingleNestingLevel(string.Empty, static (object o) => o));
label.SetBinding(Label.TextProperty, static (object o) => o);
}

label.HorizontalTextAlignment = TextAlignment.Center;
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48 changes: 31 additions & 17 deletions src/Controls/src/Core/ContentConverter.cs
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Expand Up @@ -66,31 +66,45 @@ static Label ConvertToLabel(string textContent, ContentPresenter presenter)

static void BindTextProperties(BindableObject content)
{
BindProperty(content, TextElement.TextColorProperty, static (ITextElement te) => te.TextColor);
BindProperty(content, TextElement.CharacterSpacingProperty, static (ITextElement te) => te.CharacterSpacing);
BindProperty(content, TextElement.TextTransformProperty, static (ITextElement te) => te.TextTransform);
var source = new RelativeBindingSource(RelativeBindingSourceMode.FindAncestor, typeof(ITextElement));
if (ShouldSetBinding(content, TextElement.TextColorProperty))
{
content.SetBinding(TextElement.TextColorProperty, static (ITextElement te) => te.TextColor, source: source);
}

if (ShouldSetBinding(content, TextElement.CharacterSpacingProperty))
{
content.SetBinding(TextElement.CharacterSpacingProperty, static (ITextElement te) => te.CharacterSpacing, source: source);
}

if (ShouldSetBinding(content, TextElement.TextTransformProperty))
{
content.SetBinding(TextElement.TextTransformProperty, static (ITextElement te) => te.TextTransform, source: source);
}
}

static void BindFontProperties(BindableObject content)
{
BindProperty(content, FontElement.FontAttributesProperty, static (IFontElement fe) => fe.FontAttributes);
BindProperty(content, FontElement.FontSizeProperty, static (IFontElement fe) => fe.FontSize);
BindProperty(content, FontElement.FontFamilyProperty, static (IFontElement fe) => fe.FontFamily);
}
var source = new RelativeBindingSource(RelativeBindingSourceMode.FindAncestor, typeof(IFontElement));
if (ShouldSetBinding(content, FontElement.FontAttributesProperty))
{
content.SetBinding(FontElement.FontAttributesProperty, static (IFontElement fe) => fe.FontAttributes, source: source);
}

static void BindProperty<TSource, TProperty>(
BindableObject content,
BindableProperty property,
Func<TSource, TProperty> getter)
{
if (content.IsSet(property) || content.GetIsBound(property))
if (ShouldSetBinding(content, FontElement.FontSizeProperty))
{
// Don't override the property if user has already set it
return;
content.SetBinding(FontElement.FontSizeProperty, static (IFontElement fe) => fe.FontSize, source: source);
}

content.SetBinding(property, TypedBinding.ForSingleNestingLevel(
property.PropertyName, getter, source: new RelativeBindingSource(RelativeBindingSourceMode.FindAncestor, typeof(TSource))));
if (ShouldSetBinding(content, FontElement.FontFamilyProperty))
{
content.SetBinding(FontElement.FontFamilyProperty, static (IFontElement fe) => fe.FontFamily, source: source);
}
}

static bool ShouldSetBinding(BindableObject content, BindableProperty property)
{
return !content.IsSet(property) && !content.GetIsBound(property);
}

static bool HasTemplateAncestor(ContentPresenter presenter, Type type)
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12 changes: 5 additions & 7 deletions src/Controls/src/Core/ContentPresenter.cs
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Expand Up @@ -17,14 +17,12 @@ public class ContentPresenter : Compatibility.Layout, IContentView
/// <include file="../../docs/Microsoft.Maui.Controls/ContentPresenter.xml" path="//Member[@MemberName='.ctor']/Docs/*" />
public ContentPresenter()
{
SetBinding(
this.SetBinding(
ContentProperty,
TypedBinding.ForSingleNestingLevel(
nameof(IContentView.Content),
static (IContentView view) => view.Content,
source: RelativeBindingSource.TemplatedParent,
converter: new ContentConverter(),
converterParameter: this));
static (IContentView view) => view.Content,
source: RelativeBindingSource.TemplatedParent,
converter: new ContentConverter(),
converterParameter: this);
}

/// <include file="../../docs/Microsoft.Maui.Controls/ContentPresenter.xml" path="//Member[@MemberName='Content']/Docs/*" />
Expand Down
12 changes: 12 additions & 0 deletions src/Controls/src/Core/Controls.Core.csproj
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Expand Up @@ -45,6 +45,18 @@
<ProjectReference Include="..\..\..\Controls\src\Core.Design\Controls.Core.Design.csproj" ReferenceOutputAssembly="false" />
</ItemGroup>

<PropertyGroup>
<InterceptorsPreviewNamespaces>$(InterceptorsPreviewNamespaces);Microsoft.Maui.Controls.Generated</InterceptorsPreviewNamespaces>
<!-- https://github.com/dotnet/msbuild/issues/9785 -->
<CompilerResponseFile Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'windows'">$(CompilerResponseFile);WorkaroundXamlPreCompilePreviewFeatures.rsp</CompilerResponseFile>
</PropertyGroup>
<ItemGroup>
<ProjectReference
Include="..\..\..\Controls\src\BindingSourceGen\Controls.BindingSourceGen.csproj"
OutputItemType="Analyzer"
ReferenceOutputAssembly="false" />
</ItemGroup>

<ItemGroup>
<PackageReference Include="Microsoft.Extensions.Configuration" />
<PackageReference Include="Microsoft.Extensions.DependencyInjection" />
Expand Down
2 changes: 1 addition & 1 deletion src/Controls/src/Core/Handlers/Items/Tizen/ItemTemplateAdaptor.cs
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Expand Up @@ -436,7 +436,7 @@ static View CreateView()
{
TextColor = Colors.Black,
};
label.SetBinding(XLabel.TextProperty, TypedBinding.ForSingleNestingLevel(string.Empty, static (object source) => source, converter: new ToTextConverter()));
label.SetBinding(XLabel.TextProperty, static (object source) => source, converter: new ToTextConverter());

return new Controls.StackLayout
{
Expand Down
6 changes: 3 additions & 3 deletions src/Controls/src/Core/Handlers/Shell/Tizen/ShellContentItemAdaptor.cs
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Expand Up @@ -29,9 +29,9 @@ public override NView CreateNativeView(int index)
var nativeView = base.CreateNativeView(index);

var view = GetTemplatedView(nativeView);
view?.SetBinding(ShellContentItemView.SelectedTextColorProperty, TypedBinding.ForSingleNestingLevel("TitleColor", static (ItemAppearance appearance) => appearance.TitleColor, source: _itemAppearance));
view?.SetBinding(ShellContentItemView.SelectedBarColorProperty, TypedBinding.ForSingleNestingLevel("ForegroundColor", static (ItemAppearance appearance) => appearance.ForegroundColor, source: _itemAppearance));
view?.SetBinding(ShellContentItemView.UnselectedColorProperty, TypedBinding.ForSingleNestingLevel("UnselectedColor", static (ItemAppearance appearance) => appearance.UnselectedColor, source: _itemAppearance));
view?.SetBinding(ShellContentItemView.SelectedTextColorProperty, static (ItemAppearance appearance) => appearance.TitleColor, source: _itemAppearance);
view?.SetBinding(ShellContentItemView.SelectedBarColorProperty, static (ItemAppearance appearance) => appearance.ForegroundColor, source: _itemAppearance);
view?.SetBinding(ShellContentItemView.UnselectedColorProperty, static (ItemAppearance appearance) => appearance.UnselectedColor, source: _itemAppearance);

return nativeView;
}
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2 changes: 1 addition & 1 deletion src/Controls/src/Core/Handlers/Shell/Tizen/ShellContentItemView.cs
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Expand Up @@ -63,7 +63,7 @@ void InitializeComponent()
HorizontalTextAlignment = TextAlignment.Center,
VerticalTextAlignment = TextAlignment.Center,
};
_label.SetBinding(Label.TextProperty, TypedBinding.ForSingleNestingLevel("Title", static (BaseShellItem item) => item.Title));
_label.SetBinding(Label.TextProperty, static (BaseShellItem item) => item.Title);

_bar = new BoxView
{
Expand Down
4 changes: 2 additions & 2 deletions src/Controls/src/Core/Handlers/Shell/Tizen/ShellFlyoutItemView.cs
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Expand Up @@ -36,15 +36,15 @@ void InitializeComponent()
HorizontalOptions = LayoutOptions.Center,
VerticalOptions = LayoutOptions.Center,
};
icon.SetBinding(Image.SourceProperty, TypedBinding.ForSingleNestingLevel("Icon", static (BaseShellItem item) => item.Icon));
icon.SetBinding(Image.SourceProperty, static (BaseShellItem item) => item.Icon);

var label = new Label
{
Margin = new Thickness(15, 15),
FontSize = 16,
VerticalTextAlignment = TextAlignment.Center,
};
label.SetBinding(Label.TextProperty, TypedBinding.ForSingleNestingLevel("Title", static (BaseShellItem item) => item.Title));
label.SetBinding(Label.TextProperty, static (BaseShellItem item) => item.Title);

_grid = new Grid
{
Expand Down
2 changes: 1 addition & 1 deletion src/Controls/src/Core/Handlers/Shell/Tizen/ShellSearchItemAdaptor.cs
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Expand Up @@ -25,7 +25,7 @@ static View CreateView()
{
TextColor = GColors.Black,
};
label.SetBinding(Label.TextProperty, TypedBinding.ForSingleNestingLevel(string.Empty, static (object source) => source));
label.SetBinding(Label.TextProperty, static (object source) => source);

return new Controls.StackLayout
{
Expand Down
4 changes: 2 additions & 2 deletions src/Controls/src/Core/Handlers/Shell/Tizen/ShellSectionItemAdaptor.cs
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Expand Up @@ -28,8 +28,8 @@ public override NView CreateNativeView(int index)
var nativeView = base.CreateNativeView(index);

var view = GetTemplatedView(nativeView);
view?.SetBinding(ShellSectionItemView.SelectedColorProperty, TypedBinding.ForSingleNestingLevel("TitleColor", static (ItemAppearance appearance) => appearance.TitleColor, source: _itemAppearance));
view?.SetBinding(ShellSectionItemView.UnselectedColorProperty, TypedBinding.ForSingleNestingLevel("UnselectedColor", static (ItemAppearance appearance) => appearance.UnselectedColor, source: _itemAppearance));
view?.SetBinding(ShellSectionItemView.SelectedColorProperty, static (ItemAppearance appearance) => appearance.TitleColor, source: _itemAppearance);
view?.SetBinding(ShellSectionItemView.UnselectedColorProperty, static (ItemAppearance appearance) => appearance.UnselectedColor, source: _itemAppearance);

return nativeView;
}
Expand Down
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