Introduce "Composition" > "Basics" page - #2205
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Pull request overview
Adds a new Composition > Basics entry to WinUI Gallery, introducing a dedicated sample page that demonstrates foundational XAML/Composition interop concepts (Visual retrieval, child visuals, transform matrices, and clipping).
Changes:
- Added a new Composition category and CompositionBasics item to
ControlInfoData.json, including docs links and related control wiring. - Introduced the new
CompositionBasicsPage(XAML + code-behind) with interactive examples for visuals, anchor points, transform matrices, and inset clipping. - Added associated
ControlExamplesample-definition.txtsnippets for the new page.
Reviewed changes
Copilot reviewed 7 out of 7 changed files in this pull request and generated 1 comment.
Show a summary per file
| File | Description |
|---|---|
| WinUIGallery/SampleSupport/Data/ControlInfoData.json | Adds the new Composition category and CompositionBasics item metadata (docs, image, related controls). |
| WinUIGallery/Samples/CompositionBasics/CompositionBasicsPage.xaml | New UI page hosting Composition “Basics” demos using ControlExample. |
| WinUIGallery/Samples/CompositionBasics/CompositionBasicsPage.xaml.cs | Code-behind implementing the Composition interop demos (Visual, child visual, transform matrix, clip). |
| WinUIGallery/Samples/CompositionBasics/CompositionBasicsGetElementVisual.txt | Sample-definition snippet for retrieving/transforming an element Visual. |
| WinUIGallery/Samples/CompositionBasics/CompositionBasicsChildVisual.txt | Sample-definition snippet for attaching a child SpriteVisual and using AnchorPoint/Offset. |
| WinUIGallery/Samples/CompositionBasics/CompositionBasicsTransformMatrix.txt | Sample-definition snippet for composing multiple transforms via TransformMatrix. |
| WinUIGallery/Samples/CompositionBasics/CompositionBasicsClip.txt | Sample-definition snippet for clipping an element via InsetClip. |
| Compositor compositor = ElementCompositionPreview.GetElementVisual(ChildVisualHost).Compositor; | ||
| _childVisual = compositor.CreateSpriteVisual(); | ||
| _childVisual.Size = new Vector2(80); | ||
| _childVisual.Brush = compositor.CreateColorBrush(Windows.UI.Color.FromArgb(255, 0, 120, 212)); |
marcelwgn
reviewed
Jul 27, 2026
| "IconGlyph": "\uE81E", | ||
| "Items": [ | ||
| { | ||
| "UniqueId": "CompositionBasics", |
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Do you expect an "CompositionAdvanced" page or why is this called basics?
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Here's the list of pages trying to implement, the one we discussed earlier.
Do you have something else in mind?
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@marcelwgn
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