Gets or sets the center point of any possible render transform declared by RenderTransform, relative to the bounds of the element. This is a dependency property.
Assembly: PresentationCore (in PresentationCore.dll)
XMLNS for XAML: http://schemas.microsoft.com/winfx/2006/xaml/presentation, http://schemas.microsoft.com/netfx/2007/xaml/presentation
<object> <object.RenderTransformOrigin> <Point X="xOrigin" Y="yOrigin"/> </object.RenderTransformOrigin> </object>
Metadata properties set to true
has a somewhat nonstandard use of the Point structure value, in that the Point does not represent an absolute location in a coordinate system. Instead, values between 0 and 1 are interpreted as a factor for the range of the current element in each x,y axis. For example, (0.5,0.5) will cause the render transform to be centered on the element, or (1,1) would place the render transform at the bottom right corner of the element. NaN is not an accepted value.
Values beyond 0 and 1 are also accepted, and will result in more unconventional transform effects. For instance, if you set to be (5,5), and then apply a RotateTransform, the rotation point will be well outside the bounds of the element itself. The transform will spin your element around in a big circle that originates beyond bottom right. The origin might be somewhere inside its parent element and could possibly be possibly out of frame or view. Negative point values are similar, these will go beyond the top left bounds.
Render transforms do not affect layout, and are typically used to animate or apply a temporary effect to an element.
The following example builds up elements in code, applies a , and then applies a RenderTransform.
Public Sub New() Me.WindowTitle = "Rotate About Center Example" NameScope.SetNameScope(Me, New NameScope()) Dim myStackPanel As New StackPanel() myStackPanel.Margin = New Thickness(50) Dim myButton As New Button() myButton.Name = "myRenderTransformButton" Me.RegisterName(myButton.Name,myButton) myButton.RenderTransformOrigin = New Point(0.5,0.5) myButton.HorizontalAlignment = HorizontalAlignment.Left myButton.Content = "Hello World" Dim myRotateTransform As New RotateTransform(0) myButton.RenderTransform = myRotateTransform Me.RegisterName("MyAnimatedTransform",myRotateTransform) myStackPanel.Children.Add(myButton) ' ' Creates an animation that accelerates through 40% of its duration and ' decelerates through the 60% of its duration. ' Dim myRotateAboutCenterAnimation As New DoubleAnimation() Storyboard.SetTargetName(myRotateAboutCenterAnimation,"MyAnimatedTransform") Storyboard.SetTargetProperty(myRotateAboutCenterAnimation,New PropertyPath(RotateTransform.AngleProperty)) myRotateAboutCenterAnimation.From = 0.0 myRotateAboutCenterAnimation.To = 360 myRotateAboutCenterAnimation.Duration = New Duration(TimeSpan.FromMilliseconds(1000)) ' Create a Storyboard to contain the animations and ' add the animations to the Storyboard. Dim myStoryboard As New Storyboard() myStoryboard.Children.Add(myRotateAboutCenterAnimation) ' Create an EventTrigger and a BeginStoryboard action to ' start the storyboard. Dim myEventTrigger As New EventTrigger() myEventTrigger.RoutedEvent = Button.ClickEvent myEventTrigger.SourceName = myButton.Name Dim myBeginStoryboard As New BeginStoryboard() myBeginStoryboard.Storyboard = myStoryboard myEventTrigger.Actions.Add(myBeginStoryboard) myStackPanel.Triggers.Add(myEventTrigger) Me.Content = myStackPanel End Sub