Need guidance on implementing VirtualizingLayout

[michael-hawker]

There's a lot of guidance in the general ItemsRepeater guidance about using ItemsRepeater and how the lifecycle of elements works. As well as using different layouts.

However, there's not a section akin to the Custom Panel docs about how to create your own VirtualizingLayout algorithm/implementation.

I know it's not the same as Panel is as there's a convention about returning/measuring/arranging items that are only within the viewport.

Having this documented for ease of creating new types of layouts in the future would be great.

Thanks!

(I know we did a couple of layouts in the Toolkit, but I also know the developer who wrote them, @skendrot, reached out and got a lot of this info from the WinUI team to do so.)

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Document Details

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• ID: 73b67d53-da98-4d9b-835f-00d364d905e7
• Version Independent ID: 2973927d-8e2f-b669-75f4-ebad2ef8facc
• Content: VirtualizingLayout Class (Microsoft.UI.Xaml.Controls) - Windows UWP applications
• Content Source: winui-api-build/xml/Microsoft.UI.Xaml.Controls/VirtualizingLayout.xml
• Product: reunion
• Technology: winui-reference
• GitHub Login: @Karl-Bridge-Microsoft
• Microsoft Alias: kbridge