TransformGroup Class

July 28, 2014

Represents a composite Transform composed of other Transform objects.

Namespace:  System.Windows.Media
Assembly:  System.Windows (in System.Windows.dll)
XMLNS for XAML: Not mapped to an xmlns.

[ContentPropertyAttribute("Children", true)]
public sealed class TransformGroup : Transform
<TransformGroup>
  oneOrMoreTransforms
</TransformGroup>

XAML Values

oneOrMoreTransforms

One or more object elements for classes that derive from Transform. Typically these are the Windows Phone defined classes RotateTransform, ScaleTransform, SkewTransform, TranslateTransform, MatrixTransform, or TransformGroup. Object elements defined here become members of the TransformCollection collection when code accesses the Children property at run time.

The TransformGroup type exposes the following members.

  NameDescription
Public methodTransformGroupInitializes a new instance of the TransformGroup class.
Top

  NameDescription
Public propertyChildrenGets or sets the collection of child Transform objects.
Public propertyDispatcherGets the Dispatcher this object is associated with. (Inherited from DependencyObject.)
Public propertyInverseGets the inverse of this transform, if it exists. (Inherited from Transform.)
Public propertyValueGets the Matrix structure that describes the transformation represented by this TransformGroup.
Top

  NameDescription
Public methodCheckAccessDetermines whether the calling thread has access to this object. (Inherited from DependencyObject.)
Public methodClearValueClears the local value of a dependency property. (Inherited from DependencyObject.)
Public methodEquals(Object)Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
Protected methodFinalizeAllows an object to try to free resources and perform other cleanup operations before the Object is reclaimed by garbage collection. (Inherited from Object.)
Public methodGetAnimationBaseValueReturns any base value established for a Windows Phone dependency property, which would apply in cases where an animation is not active. (Inherited from DependencyObject.)
Public methodGetHashCodeServes as a hash function for a particular type. (Inherited from Object.)
Public methodGetTypeGets the Type of the current instance. (Inherited from Object.)
Public methodGetValueReturns the current effective value of a dependency property from a DependencyObject. (Inherited from DependencyObject.)
Protected methodMemberwiseCloneCreates a shallow copy of the current Object. (Inherited from Object.)
Public methodReadLocalValueReturns the local value of a dependency property, if a local value is set. (Inherited from DependencyObject.)
Public methodSetValueSets the local value of a dependency property on a DependencyObject. (Inherited from DependencyObject.)
Public methodToStringReturns a string that represents the current object. (Inherited from Object.)
Public methodTransformTransforms the specified point and returns the result. (Inherited from GeneralTransform.)
Public methodTransformBoundsTransforms the specified bounding box and returns an axis-aligned bounding box that is exactly large enough to contain it. (Inherited from Transform.)
Public methodTryTransformAttempts to transform the specified point and returns a value that indicates whether the transformation was successful. (Inherited from Transform.)
Top

  NameDescription
Public fieldStatic memberChildrenPropertyIdentifies the Children dependency property.
Top

Use a TransformGroup when you want to apply multiple Transform operations to a single object.

In a composite transformation, the order of individual transformations is important. For example, if you first rotate, then scale, then translate, you get a different result than if you first translate, then rotate, then scale. One reason order is significant is that transformations like rotation and scaling are done with respect to the origin of the coordinate system. Scaling an object that is centered at the origin produces a different result than scaling an object that has been moved away from the origin. Similarly, rotating an object that is centered at the origin produces a different result than rotating an object that has been moved away from the origin.

In XAML usages, TransformGroup uses Children as its content property and supports implicit collection usage. Therefore, to declare transforms that will be in a TransformGroup in XAML, you declare one or more transforms as object elements, placing them in order as the child elements of the TransformGroup. Nesting more than one TransformGroup is permitted.

The following example shows the markup for using a TransformGroup to fill the RenderTransform property.


<StackPanel>
  <TextBlock FontSize="28" Text="Hello">
    <TextBlock.RenderTransform>
      <TransformGroup>
        <RotateTransform Angle="45" />
        <SkewTransform CenterX="0" CenterY="0" AngleX="60"/>
      </TransformGroup>
    </TextBlock.RenderTransform>
  </TextBlock>
</StackPanel>


Windows Phone OS

Supported in: 8.1, 8.0, 7.1, 7.0

Windows Phone

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

Show:
© 2014 Microsoft