SkewTransform Class
Represents a 2-D skew.
Assembly: PresentationCore (in PresentationCore.dll)
XMLNS for XAML: http://schemas.microsoft.com/winfx/2006/xaml/presentation, http://schemas.microsoft.com/netfx/2007/xaml/presentation
The SkewTransform type exposes the following members.
| Name | Description | |
|---|---|---|
![]() | SkewTransform() | Initializes a new instance of the SkewTransform class. |
![]() | SkewTransform(Double, Double) | Initializes a new instance of the SkewTransform class that has the specified x- and y-axes angles and is centered on the origin. |
![]() | SkewTransform(Double, Double, Double, Double) | Initializes a new instance of the SkewTransform class that has the specified x- and y-axes angles and center. |
| Name | Description | |
|---|---|---|
![]() | AngleX | Gets or sets the x-axis skew angle, which is measured in degrees counterclockwise from the y-axis. |
![]() | AngleY | Gets or sets the y-axis skew angle, which is measured in degrees counterclockwise from the x-axis. |
![]() | CanFreeze | Gets a value that indicates whether the object can be made unmodifiable. (Inherited from Freezable.) |
![]() | CenterX | Gets or sets the x-coordinate of the transform center. |
![]() | CenterY | Gets or sets the y-coordinate of the transform center. |
![]() | DependencyObjectType | Gets the DependencyObjectType that wraps the CLR type of this instance. (Inherited from DependencyObject.) |
![]() | Dispatcher | Gets the Dispatcher this DispatcherObject is associated with. (Inherited from DispatcherObject.) |
![]() | HasAnimatedProperties | Gets a value that indicates whether one or more AnimationClock objects is associated with any of this object's dependency properties. (Inherited from Animatable.) |
![]() | Inverse | Gets the inverse of this transform, if it exists. (Inherited from Transform.) |
![]() | IsFrozen | Gets a value that indicates whether the object is currently modifiable. (Inherited from Freezable.) |
![]() | IsSealed | Gets a value that indicates whether this instance is currently sealed (read-only). (Inherited from DependencyObject.) |
![]() | Value | Gets the current transformation value as a Matrix. (Overrides Transform::Value.) |
| Name | Description | |
|---|---|---|
![]() | ApplyAnimationClock(DependencyProperty, AnimationClock) | Applies an AnimationClock to the specified DependencyProperty. If the property is already animated, the SnapshotAndReplace handoff behavior is used. (Inherited from Animatable.) |
![]() | ApplyAnimationClock(DependencyProperty, AnimationClock, HandoffBehavior) | Applies an AnimationClock to the specified DependencyProperty. If the property is already animated, the specified HandoffBehavior is used. (Inherited from Animatable.) |
![]() | BeginAnimation(DependencyProperty, AnimationTimeline) | Applies an animation to the specified DependencyProperty. The animation is started when the next frame is rendered. If the specified property is already animated, the SnapshotAndReplace handoff behavior is used. (Inherited from Animatable.) |
![]() | BeginAnimation(DependencyProperty, AnimationTimeline, HandoffBehavior) | Applies an animation to the specified DependencyProperty. The animation is started when the next frame is rendered. If the specified property is already animated, the specified HandoffBehavior is used. (Inherited from Animatable.) |
![]() | CheckAccess | Determines whether the calling thread has access to this DispatcherObject. (Inherited from DispatcherObject.) |
![]() | ClearValue(DependencyProperty) | Clears the local value of a property. The property to be cleared is specified by a DependencyProperty identifier. (Inherited from DependencyObject.) |
![]() | ClearValue(DependencyPropertyKey) | Clears the local value of a read-only property. The property to be cleared is specified by a DependencyPropertyKey. (Inherited from DependencyObject.) |
![]() | Clone | Creates a modifiable copy of this SkewTransform by making deep copies of its values. |
![]() | CloneCore | Makes the instance a clone (deep copy) of the specified Freezable using base (non-animated) property values. (Inherited from Freezable.) |
![]() | CloneCurrentValue | Creates a modifiable copy of this SkewTransform object by making deep copies of its values. This method does not copy resource references, data bindings, or animations, although it does copy their current values. |
![]() | CloneCurrentValueCore | Makes the instance a modifiable clone (deep copy) of the specified Freezable using current property values. (Inherited from Freezable.) |
![]() | CoerceValue | Coerces the value of the specified dependency property. This is accomplished by invoking any CoerceValueCallback function specified in property metadata for the dependency property as it exists on the calling DependencyObject. (Inherited from DependencyObject.) |
![]() | CreateInstance | Initializes a new instance of the Freezable class. (Inherited from Freezable.) |
![]() | CreateInstanceCore | When implemented in a derived class, creates a new instance of the Freezable derived class. (Inherited from Freezable.) |
![]() | Equals | Determines whether a provided DependencyObject is equivalent to the current DependencyObject. (Inherited from DependencyObject.) |
![]() | Finalize | Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.) |
![]() | Freeze() | Makes the current object unmodifiable and sets its IsFrozen property to true. (Inherited from Freezable.) |
![]() | FreezeCore | Makes this Animatable object unmodifiable or determines whether it can be made unmodifiable. (Inherited from Animatable.) |
![]() | GetAnimationBaseValue | Returns the non-animated value of the specified DependencyProperty. (Inherited from Animatable.) |
![]() | GetAsFrozen | Creates a frozen copy of the Freezable, using base (non-animated) property values. Because the copy is frozen, any frozen sub-objects are copied by reference. (Inherited from Freezable.) |
![]() | GetAsFrozenCore | Makes the instance a frozen clone of the specified Freezable using base (non-animated) property values. (Inherited from Freezable.) |
![]() | GetCurrentValueAsFrozen | Creates a frozen copy of the Freezable using current property values. Because the copy is frozen, any frozen sub-objects are copied by reference. (Inherited from Freezable.) |
![]() | GetCurrentValueAsFrozenCore | Makes the current instance a frozen clone of the specified Freezable. If the object has animated dependency properties, their current animated values are copied. (Inherited from Freezable.) |
![]() | GetHashCode | Gets a hash code for this DependencyObject. (Inherited from DependencyObject.) |
![]() | GetLocalValueEnumerator | Creates a specialized enumerator for determining which dependency properties have locally set values on this DependencyObject. (Inherited from DependencyObject.) |
![]() | GetType | Gets the Type of the current instance. (Inherited from Object.) |
![]() | GetValue | Returns the current effective value of a dependency property on this instance of a DependencyObject. (Inherited from DependencyObject.) |
![]() | InvalidateProperty | Re-evaluates the effective value for the specified dependency property (Inherited from DependencyObject.) |
![]() | MemberwiseClone | Creates a shallow copy of the current Object. (Inherited from Object.) |
![]() | OnChanged | Called when the current Freezable object is modified. (Inherited from Freezable.) |
![]() | OnFreezablePropertyChanged(DependencyObject, DependencyObject) | Ensures that appropriate context pointers are established for a DependencyObjectType data member that has just been set. (Inherited from Freezable.) |
![]() | OnFreezablePropertyChanged(DependencyObject, DependencyObject, DependencyProperty) | This member supports the Windows Presentation Foundation (WPF) infrastructure and is not intended to be used directly from your code. (Inherited from Freezable.) |
![]() | OnPropertyChanged | Overrides the DependencyObject implementation of OnPropertyChanged to also invoke any Changed handlers in response to a changing dependency property of type Freezable. (Inherited from Freezable.) |
![]() | ReadLocalValue | Returns the local value of a dependency property, if it exists. (Inherited from DependencyObject.) |
![]() | ReadPreamble | Ensures that the Freezable is being accessed from a valid thread. Inheritors of Freezable must call this method at the beginning of any API that reads data members that are not dependency properties. (Inherited from Freezable.) |
![]() | SetCurrentValue | Sets the value of a dependency property without changing its value source. (Inherited from DependencyObject.) |
![]() | SetValue(DependencyProperty, Object) | Sets the local value of a dependency property, specified by its dependency property identifier. (Inherited from DependencyObject.) |
![]() | SetValue(DependencyPropertyKey, Object) | Sets the local value of a read-only dependency property, specified by the DependencyPropertyKey identifier of the dependency property. (Inherited from DependencyObject.) |
![]() | ShouldSerializeProperty | Returns a value that indicates whether serialization processes should serialize the value for the provided dependency property. (Inherited from DependencyObject.) |
![]() | ToString() | Creates a string representation of this GeneralTransform. (Inherited from GeneralTransform.) |
![]() | ToString(IFormatProvider) | Creates a string representation of this instance, based on the passed IFormatProvider parameter. (Inherited from GeneralTransform.) |
![]() | 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. (Inherited from Transform.) |
![]() | TryTransform | Attempts to transform the specified point and returns a value that indicates whether the transformation was successful. (Inherited from Transform.) |
![]() | VerifyAccess | Enforces that the calling thread has access to this DispatcherObject. (Inherited from DispatcherObject.) |
![]() | WritePostscript | Raises the Changed event for the Freezable and invokes its OnChanged method. Classes that derive from Freezable should call this method at the end of any API that modifies class members that are not stored as dependency properties. (Inherited from Freezable.) |
![]() | WritePreamble | Verifies that the Freezable is not frozen and that it is being accessed from a valid threading context. Freezable inheritors should call this method at the beginning of any API that writes to data members that are not dependency properties. (Inherited from Freezable.) |
| Name | Description | |
|---|---|---|
![]() ![]() | AngleXProperty | Identifies the AngleX dependency property. |
![]() ![]() | AngleYProperty | Identifies the AngleY dependency property. |
![]() ![]() | CenterXProperty | Identifies the CenterX dependency property. |
![]() ![]() | CenterYProperty | Identifies the CenterY dependency property. |
| Name | Description | |
|---|---|---|
![]() ![]() | IFormattable::ToString | Formats the value of the current instance using the specified format. (Inherited from GeneralTransform.) |
A SkewTransform is useful for creating the illusion of 3-dimensional depth in a 2-D object.
Freezable Features: Because it inherits from the Freezable class, the SkewTransform class provides several special features: SkewTransform objects can be declared as resources, shared among multiple objects, made read-only to improve performance, cloned, and made thread-safe. For more information about the different features provided by Freezable objects, see Freezable Objects Overview.
This example shows how to use a SkewTransform to skew an element. A skew, which is also known as a shear, is a transformation that stretches the coordinate space in a non-uniform manner. One typical use of a SkewTransform is for simulating 3-D depth in 2-D objects.
Use the CenterX and CenterY properties to specify the center point of the SkewTransform.
Use the AngleX and AngleY properties to specify the skew angle of the x-axis and y-axis, and to skew the current coordinate system along these axes.
To predict the effect of a skew transformation, consider that AngleX skews x-axis values relative to the original coordinate system. Therefore, for an AngleX of 30, the y-axis rotates 30 degrees through the origin and skews the values in x- by 30 degrees from that origin. Likewise, an AngleY of 30 skews the y- values of the shape by 30 degrees from the origin. Note that this is not the same effect as translating (moving) the coordinate system by 30 degrees in x- or y-.
The following example applies a horizontal skew of 45 degrees to a Rectangle from a center point of (0,0).
<Rectangle Height="50" Width="50" Fill="#CCCCCCFF" Stroke="Blue" StrokeThickness="2" Canvas.Left="100" Canvas.Top="100"> <Rectangle.RenderTransform> <!-- Applies a horizontal skew of 45 degrees from a center point of (0,0). --> <SkewTransform CenterX="0" CenterY="0" AngleX="45" AngleY="0" /> </Rectangle.RenderTransform> </Rectangle>
The following example applies a horizontal skew of 45 degrees to a Rectangle from a center point of (25,25).
<Rectangle Height="50" Width="50" Fill="#CCCCCCFF" Canvas.Left="100" Canvas.Top="100" Stroke="Blue" StrokeThickness="2"> <Rectangle.RenderTransform> <!-- Applies a horizontal skew of 45 degrees from a center point of (25,25). --> <SkewTransform CenterX="25" CenterY="25" AngleX="45" AngleY="0" /> </Rectangle.RenderTransform> </Rectangle>
The following example applies a vertical skew of 45 degrees to a Rectangle from a center point of (25,25).
<Rectangle Height="50" Width="50" Fill="#CCCCCCFF" Stroke="Blue" StrokeThickness="2" Canvas.Left="100" Canvas.Top="100"> <Rectangle.RenderTransform> <!-- Applies a vertical skew of 45 degrees from a center point of (25,25). --> <SkewTransform CenterX="25" CenterY="25" AngleX="0" AngleY="45" /> </Rectangle.RenderTransform> </Rectangle>
The following illustration shows the different skews that are used in this example.

For the complete sample, see 2-D Transforms Sample.
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
