Information
The topic you requested is included in another documentation set. For convenience, it's displayed below. Choose Switch to see the topic in its original location.

RotateTransform Class

Rotates an object clockwise about a specified point in a two-dimensional x-y coordinate system.

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

public sealed class RotateTransform : Transform
<RotateTransform .../>

The RotateTransform type exposes the following members.

  NameDescription
Public methodSupported by Silverlight for Windows PhoneRotateTransformInitializes a new instance of the RotateTransform class.
Top

  NameDescription
Public propertySupported by Silverlight for Windows PhoneAngleGets or sets the angle, in degrees, of clockwise rotation.
Public propertySupported by Silverlight for Windows PhoneCenterXGets or sets the x-coordinate of the rotation center point.
Public propertySupported by Silverlight for Windows PhoneCenterYGets or sets the y-coordinate of the rotation center point.
Public propertySupported by Silverlight for Windows PhoneDispatcherGets the Dispatcher this object is associated with. (Inherited from DependencyObject.)
Public propertySupported by Silverlight for Windows PhoneInverseGets the inverse of this transform, if it exists. (Inherited from Transform.)
Top

  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.)
Public methodSupported by Silverlight for Windows PhoneTransformTransforms the specified point and returns the result. (Inherited from GeneralTransform.)
Public methodSupported by Silverlight for Windows PhoneTransformBoundsTransforms the specified bounding box and returns an axis-aligned bounding box that is exactly large enough to contain it. (Inherited from Transform.)
Public methodSupported by Silverlight for Windows PhoneTryTransformAttempts to transform the specified point and returns a value that indicates whether the transformation was successful. (Inherited from Transform.)
Top

  NameDescription
Public fieldStatic memberSupported by Silverlight for Windows PhoneAnglePropertyIdentifies the Angle dependency property.
Public fieldStatic memberSupported by Silverlight for Windows PhoneCenterXPropertyIdentifies the CenterX dependency property.
Public fieldStatic memberSupported by Silverlight for Windows PhoneCenterYPropertyIdentifies the CenterY dependency property.
Top

A RotateTransform is defined by the following properties: Angle rotates an object by a specified angle about the point CenterX, CenterY.

When you use a RotateTransform, the transformation rotates the coordinate system for a particular object about the origin point for its frame of reference. Therefore, depending on the position of the object, it might not rotate in place (around its center). For example, if an object is positioned 200 units from 0 along the x-axis, a rotation of 30 degrees can swing the object 30 degrees along a circle that has a radius of 200, which is drawn around the origin. To rotate an object in place, set the CenterX and CenterY of the RotateTransform to the center of the object to rotate.

The local 0,0 for an object can be offset on a Canvas using Canvas.Left and Canvas.Top, but this does not count as a transform; the object retains its own local 0,0 in this case for transform purposes.

Multiple transforms can be applied with a TransformGroup.

Transforms can alter the display of text in your application to create a decorative effect. The following example shows text rotated 90 degrees using a RotateTransform.

TextBlock using a RotateTransform

Diagram showing rotated text.

The following example uses a RotateTransform to rotate text. An Angle value of 90 rotates the element 90 degrees clockwise.


<!-- Rotate the text 90 degrees using a RotateTransform. -->
<TextBlock Text="Rotated Text" FontSize="32" Foreground="Teal">
  <TextBlock.RenderTransform>
    <RotateTransform Angle="90" />
  </TextBlock.RenderTransform>
</TextBlock>


Transform objects can be accessed and manipulated by using code. One way to do this is to name the Transform and then access it by using its name. The following example shows how to increase the ScaleX and ScaleY property values of a ScaleTransform applied to a Rectangle every time the Rectangle is clicked.

Run this sample


<StackPanel>
  <Rectangle MouseLeftButtonDown="HandleMouseButtonDown"
    Width="50" Height="50" Fill="RoyalBlue">
    <Rectangle.RenderTransform>

      <!-- If you give the transform a name you can 
        access it easily from code. -->
      <ScaleTransform x:Name="myScaleTransform" />
    </Rectangle.RenderTransform>
  </Rectangle>
</StackPanel>



private void HandleMouseButtonDown(object sender, MouseButtonEventArgs e)
{
    // Increase ScaleX and ScaleY by 25%.
    myScaleTransform.ScaleX = myScaleTransform.ScaleX * 1.25;
    myScaleTransform.ScaleY = myScaleTransform.ScaleY * 1.25;
}


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.
Was this page helpful?
(1500 characters remaining)
Thank you for your feedback

Community Additions

Show:
© 2014 Microsoft