Artikel
11/17/2011

Transform Class

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

Defines functionality that enables transformations in a two-dimensional plane.

Inheritance Hierarchy

System.Object
  System.Windows.DependencyObject
    System.Windows.Media.GeneralTransform
      System.Windows.Media.Transform
        System.Windows.Media.CompositeTransform
        System.Windows.Media.MatrixTransform
        System.Windows.Media.RotateTransform
        System.Windows.Media.ScaleTransform
        System.Windows.Media.SkewTransform
        System.Windows.Media.TransformGroup
        System.Windows.Media.TranslateTransform

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

Syntax

'Declaration
Public MustInherit Class Transform _
    Inherits GeneralTransform

public abstract class Transform : GeneralTransform

The Transform type exposes the following members.

Properties

	Name	Description
	Dispatcher	Gets the Dispatcher this object is associated with. (Inherited from DependencyObject.)
	Inverse	Gets the inverse of this transform, if it exists. (Overrides GeneralTransform.Inverse.)

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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.)
	Transform	Transforms the specified point and returns the result. (Inherited from GeneralTransform.)
	TransformBounds	Transforms the specified bounding box and returns an axis-aligned bounding box that is exactly large enough to contain it. (Overrides GeneralTransform.TransformBounds(Rect).)
	TryTransform	Attempts to transform the specified point and returns a value that indicates whether the transformation was successful. (Overrides GeneralTransform.TryTransform(Point, Point%).)

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Remarks

Transformations include rotation (RotateTransform), scale (ScaleTransform), skew (SkewTransform), and translation (TranslateTransform). This class hierarchy differs from the Matrix structure because it is a class and it supports animation and enumeration semantics.

For XAML syntaxes that take a Transform, you need to specify a nonabstract derived type of Transform as an object element. Typically, this is one of the Silverlight-defined classes: MatrixTransform, RotateTransform, ScaleTransform, SkewTransform, TransformGroup, and TranslateTransform. See the syntax sections on the appropriate class.

Use the MatrixTransform class to create custom transformations that are not provided by the RotateTransform, ScaleTransform, SkewTransform, and TranslateTransform classes.

A two-dimensional x-y plane uses a 3x3 matrix for transformations. You can multiply affine transformation matrices to form linear transformations, such as rotation and skew (shear) that are followed by translation.

An affine transformation matrix has its final column equal to (0, 0, 1); therefore, you only have to specify the members in the first two columns.

You cannot extract the matrix-specific information from the nonmatrix transformations. However you can adjust the nonmatrix transformations with their specific properties, or replace a transformation with a matrix transformation at run time.

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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