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Allow setting the backing classes for UI elements #342

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Feb 23, 2019
Merged

Allow setting the backing classes for UI elements #342

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35236d7
Allow setting the backing function for UI elements
sdaves Feb 20, 2019
f4eba4a
Update tests for code generator
sdaves Feb 20, 2019
a2816f9
Update views-extending.md
sdaves Feb 21, 2019
b34c263
Add generated Xamarin.Forms.Core.fs
sdaves Feb 22, 2019
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15 changes: 15 additions & 0 deletions docs/views-extending.md
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Original file line number Diff line number Diff line change
Expand Up @@ -215,6 +215,21 @@ need not be added, you can set them on elements using the helper `With`, usable
View.Map(hasZoomEnabled = true, hasScrollEnabled = true).With(horizontalOptions = LayoutOptions.FillAndExpand)
```

### Example: MasterDetailPage without a toolbar on UWP with custom ViewBuilders

Fabulous uses ViewBuilders to create the underlying Xamarin.Forms classes. Customizing ViewBuilders is not the recommended way for custom controls but it is a great solution for overridden controls like in the following example:

```fsharp
type MasterDetailPageWithoutToolbar() =
inherit Xamarin.Forms.MasterDetailPage()
override __.ShouldShowToolbarButton() = false

Fabulous.DynamicViews.ViewBuilders.CreateFuncMasterDetailPage <- fun () ->
upcast(new MasterDetailPageWithoutToolbar())

View.MasterDetailPage() // this now uses MasterDetailPageWithoutToolbar
```

See also:

* [Core Elements](views-elements.md)
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