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VirtualizingStackPanel::OnViewportOffsetChanged Method

Called when the offset of the viewport changes as a user scrolls through content.

Namespace:  System.Windows.Controls
Assembly:  PresentationFramework (in PresentationFramework.dll)

virtual void OnViewportOffsetChanged(
	Vector oldViewportOffset, 
	Vector newViewportOffset


Type: System.Windows::Vector

The old offset of the viewport.

Type: System.Windows::Vector

The new offset of the viewport

Use this method, in a derived class, to detect and respond to changes in the viewport location.

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5 SP1, 3.0 SP2

.NET Framework Client Profile

Supported in: 4, 3.5 SP1
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