Artigo
11/18/2011

TouchDevice Class

Microsoft Silverlight will reach end of support after October 2021. Learn more.

Identifies a "device" that produced the touch point. This is not a literal device, instead it distinguishes touch points through a down/move/up sequence.

Inheritance Hierarchy

System.Object
System.Windows.DependencyObject
System.Windows.Input.TouchDevice

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

Syntax

'Declaration
<ContentPropertyAttribute("DirectlyOver", True)> _
Public NotInheritable Class TouchDevice _
    Inherits DependencyObject

[ContentPropertyAttribute("DirectlyOver", true)]
public sealed class TouchDevice : DependencyObject

The TouchDevice type exposes the following members.

Constructors

	Name	Description
	TouchDevice	Initializes a new instance of the TouchDevice class.

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Properties

	Name	Description
	DirectlyOver	Gets the topmost UIElement object that the mouse is over at the time that this touch point was produced.
	Dispatcher	Gets the Dispatcher this object is associated with. (Inherited from DependencyObject.)
	Id	Gets a unique ID as provided by the operating system for a particular touch device.

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Methods

	Name	Description
	CheckAccess	Determines whether the calling thread has access to this object. (Inherited from DependencyObject.)
	ClearValue	Clears the local value of a dependency property. (Inherited from DependencyObject.)
	Equals(Object)	Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
	Finalize	Allows an object to try to free resources and perform other cleanup operations before the Object is reclaimed by garbage collection. (Inherited from Object.)
	GetAnimationBaseValue	Returns any base value established for a Silverlight dependency property, which would apply in cases where an animation is not active. (Inherited from DependencyObject.)
	GetHashCode	Serves as a hash function for a particular type. (Inherited from Object.)
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	GetValue	Returns the current effective value of a dependency property from a DependencyObject. (Inherited from DependencyObject.)
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	ReadLocalValue	Returns the local value of a dependency property, if a local value is set. (Inherited from DependencyObject.)
	SetValue	Sets the local value of a dependency property on a DependencyObject. (Inherited from DependencyObject.)
	ToString	Returns a string that represents the current object. (Inherited from Object.)

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Fields

	Name	Description
	DirectlyOverProperty	Identifies the DirectlyOver dependency property.
	IdProperty	Identifies the Id dependency property.

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Remarks

The Id of the TouchDevice is based on the underlying dwID value of the touch message at operating system level.

Version Information

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

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

Platforms

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

Thread Safety

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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