Xamarin.Forms.VisualElement.OnSizeRequest Method
This method is called during the measure pass of a layout cycle to get the desired size of an element.

Syntax

protected virtual SizeRequest OnSizeRequest (double widthConstraint, double heightConstraint)

Parameters

widthConstraint
The available width for the element to use.
heightConstraint
The available height for the element to use.

Returns

A Xamarin.Forms.SizeRequest> which contains the desired size of the element.

Remarks

The results of this method will be (-1, -1) if the element has not yet been realized with a platform specific backing control. Overriding this method does not require a call to the base class so long as a valid SizeRequest is returned.

Requirements

Namespace: Xamarin.Forms
Assembly: Xamarin.Forms.Core (in Xamarin.Forms.Core.dll)
Assembly Versions: 1.0.0.0, 1.1.0.0, 1.2.0.0, 1.3.0.0