UIElement.ManipulationDelta Event

 

Occurs when the input device changes position during a manipulation.

Namespace:   System.Windows
Assembly:  PresentationCore (in PresentationCore.dll)

member ManipulationDelta : IEvent<EventHandler<ManipulationDeltaEventArgs>,
    ManipulationDeltaEventArgs>

The ManipulationDelta event occurs multiple times when the user drags fingers over the screen during a manipulation and again when inertia occurs. You can use the IsInertial property to check whether the event is occurring during inertia.

The element on with ManipulationDelta event occurs is not affected in any way when the event occurs. You must provide the logic to the element that is to be manipulated. The CumulativeManipulation and DeltaManipulation properties, which are of type ManipulationDelta, contain data about how the position of the manipulations change and interpreted as moving, resizing, or rotating an object. You apply that information to the element that is to be manipulated.

For more information about manipulations, see the Input Overview. For an example of an application that responds to manipulations, see Walkthrough: Creating Your First Touch Application.

The following example shows an event handler for the ManipulationDelta event. The example uses the DeltaManipulation property to move, resize, and rotate a Rectangle. The example also checks whether the ManipulationDelta event occurred during inertia and whether the rectangle is touching the edge of a window. If those cases are true, the application stops the manipulation to prevent the rectangle from leaving the visible area of the application. This example is part of a larger example in Walkthrough: Creating Your First Touch Application.

No code example is currently available or this language may not be supported.

.NET Framework
Available since 4.0
Silverlight
Available since 4.0
Windows Phone Silverlight
Available since 7.0
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