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TouchPoint Class

Represents a single touch point from a touch message source.

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

public sealed class TouchPoint : DependencyObject

The TouchPoint type exposes the following members.

  NameDescription
Public methodSupported by Silverlight for Windows PhoneTouchPointInitializes a new instance of the TouchPoint class.
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  NameDescription
Public propertySupported by Silverlight for Windows PhoneActionGets the type of action (up, down, move) that the TouchPoint represents.
Public propertySupported by Silverlight for Windows PhoneDispatcherGets the Dispatcher this object is associated with. (Inherited from DependencyObject.)
Public propertySupported by Silverlight for Windows PhonePositionGets the X,Y coordinate position of the touch point as a Point.
Public propertySupported by Silverlight for Windows PhoneSizeGets the rectangular area that is reported as the touch-point contact area.
Public propertySupported by Silverlight for Windows PhoneTouchDeviceGets the specific device type that produced the touch point.
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  NameDescription
Public methodSupported by Silverlight for Windows PhoneCheckAccessDetermines whether the calling thread has access to this object. (Inherited from DependencyObject.)
Public methodSupported by Silverlight for Windows PhoneClearValueClears the local value of a dependency property. (Inherited from DependencyObject.)
Public methodSupported by Silverlight for Windows PhoneEquals(Object)Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
Protected methodSupported by Silverlight for Windows PhoneFinalizeAllows an object to try to free resources and perform other cleanup operations before the Object is reclaimed by garbage collection. (Inherited from Object.)
Public methodSupported by Silverlight for Windows PhoneGetAnimationBaseValueReturns any base value established for a Silverlight dependency property, which would apply in cases where an animation is not active. (Inherited from DependencyObject.)
Public methodSupported by Silverlight for Windows PhoneGetHashCodeServes as a hash function for a particular type. (Inherited from Object.)
Public methodSupported by Silverlight for Windows PhoneGetTypeGets the Type of the current instance. (Inherited from Object.)
Public methodSupported by Silverlight for Windows PhoneGetValueReturns the current effective value of a dependency property from a DependencyObject. (Inherited from DependencyObject.)
Protected methodSupported by Silverlight for Windows PhoneMemberwiseCloneCreates a shallow copy of the current Object. (Inherited from Object.)
Public methodSupported by Silverlight for Windows PhoneReadLocalValueReturns the local value of a dependency property, if a local value is set. (Inherited from DependencyObject.)
Public methodSupported by Silverlight for Windows PhoneSetValueSets the local value of a dependency property on a DependencyObject. (Inherited from DependencyObject.)
Public methodSupported by Silverlight for Windows PhoneToStringReturns a string that represents the current object. (Inherited from Object.)
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  NameDescription
Public fieldStatic memberSupported by Silverlight for Windows PhoneActionPropertyIdentifies the Action dependency property.
Public fieldStatic memberSupported by Silverlight for Windows PhonePositionPropertyIdentifies the Position dependency property.
Public fieldStatic memberSupported by Silverlight for Windows PhoneSizePropertyIdentifies the Size dependency property.
Public fieldStatic memberSupported by Silverlight for Windows PhoneTouchDevicePropertyIdentifies the TouchDevice dependency property.
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You get a TouchPoint value from one of two techniques, both of which require handling the FrameReported event and then working with the TouchFrameEventArgs event data:

  • Call GetPrimaryTouchPoint to get the primary touch point. If you are not processing your own gestures, the primary touch point is often the only data point you need.

  • Call GetTouchPoints. Using the returned collection, work with the TouchPoint items that are relevant to how your application processes touch input.

The Position of a TouchPoint is always the center of its contact area. To get a bounding box for a specified TouchPoint, you can center a bounding box on the Position point, with the dimensions of that bounding box based on Size.

Touch input requires hardware that is touch-sensitive and an environment that supports the infrastructure to expose touch events to individual applications. For more information, see Touch Input in Silverlight.

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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