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Fixes RadialGradientBrush compatibility issues in AvaloniaUI due to Issue
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| name | fixing-avaloniaui-radialgradientbrush |
| description | Fixes RadialGradientBrush compatibility issues in AvaloniaUI due to Issue |
AvaloniaUI에서 RadialGradientBrush는 WPF와 달리 GradientOrigin과 Center 값이 다르면 정상 동작하지 않음.
관련 이슈: AvaloniaUI/Avalonia#19888
WPF XAML에서 <RadialGradientBrush> 요소를 찾고 GradientOrigin과 Center 속성값을 비교.
GradientOrigin ≠ Center인 경우 반드시 사용자에게 다음 선택지를 제시:
RadialGradientBrush의 GradientOrigin과 Center 값이 다릅니다.
- GradientOrigin: {현재값}
- Center: {현재값}
AvaloniaUI에서는 두 값이 동일해야 정상 동작합니다.
어느 쪽 값으로 통일하시겠습니까?
1. GradientOrigin 값으로 통일 → 결과: GradientOrigin="{GO값}" Center="{GO값}"
2. Center 값으로 통일 → 결과: GradientOrigin="{C값}" Center="{C값}"
WPF 원본:
<RadialGradientBrush GradientOrigin="20%,20%" Center="28%,28%" RadiusX="75%" RadiusY="75%">
<GradientStop Color="White" Offset="0"/>
<GradientStop Color="Black" Offset="1"/>
</RadialGradientBrush>
AvaloniaUI 변환 (GradientOrigin 선택 시):
<RadialGradientBrush GradientOrigin="20%,20%" Center="20%,20%" RadiusX="75%" RadiusY="75%">
<GradientStop Color="White" Offset="0"/>
<GradientStop Color="Black" Offset="1"/>
</RadialGradientBrush>
AvaloniaUI 변환 (Center 선택 시):
<RadialGradientBrush GradientOrigin="28%,28%" Center="28%,28%" RadiusX="75%" RadiusY="75%">
<GradientStop Color="White" Offset="0"/>
<GradientStop Color="Black" Offset="1"/>
</RadialGradientBrush>
WPF IValueConverter rules: MarkupExtension singleton, pure functions, null/UnsetValue handling, TemplateBinding.
WPF Freezable performance rules: Freeze() all Brush/Pen/Geometry; create-and-freeze in constructor, reuse in OnRender.
WPF MVVM layer-separation rules: no System.Windows in ViewModels, BCL-only types, CommunityToolkit.Mvvm base classes. Preloaded into MVVM-related wpf-dev-pack agents.
Banned wpf-dev-pack patterns (P-001..P-004): ViewModelLocator, code-behind DataContext, Stateless ViewModel, mixing composition paths.
WPF rendering anti-patterns: no InvalidateVisual in loops, no resource allocation in OnRender.
WPF ResourceDictionary rules: Generic.xaml as MergedDictionaries hub only, per-control style files, resource order.