Assembly: PresentationFramework (in presentationframework.dll)
XML Namespace: http://schemas.microsoft.com/winfx/2006/xaml/presentation
The CustomPopupPlacement structure defines a location for a Popup control with respect to its parent, and defines how the Popup moves to become more visible when it is obscured by a screen boundary.
A System.Windows.Controls.Primitives.CustomPopupPlacementCallback delegate returns an array of these structures as custom placement options for a Popup when the Placement property is set to Custom.
This set of examples shows how to use the placement properties to specify the position of a Popup control.
You can determine the position of a Popup control by using the following properties:
The first four properties define a two-dimensional coordinate on the screen. The fifth property, Placement, positions the Popup and also defines its behavior if its content overlaps the screen boundaries.
Use a PlacementMode enumeration value to set the Placement property. For more information about the enumeration values for PlacementMode, see How to: Use the PlacementMode Enumeration to set Placement.
The following illustrations show how the placement properties work together to position a Popup control.
Popup placement by using the Placement property
Popup placement by using the Placement and PlacementRectangle properties
Popup placement by using the Placement, PlacementRectangle, and Offset properties
The following example shows how to set these Popup properties. For the complete sample, see Popup Position Sample.
Popup myPopup = new Popup(); myPopup.PlacementTarget = myEllipse; myPopup.PlacementRectangle = new Rect(0, 0, 30, 50); myPopup.VerticalOffset = 20; myPopup.HorizontalOffset = 20; myPopup.Placement = PlacementMode.Bottom; myPopup.PopupAnimation = PopupAnimation.Fade; myPopup.AllowsTransparency = true; TextBlock popupText = new TextBlock(); popupText.Background = Brushes.Beige; popupText.FontSize = 12; popupText.Width = 75; popupText.TextWrapping = TextWrapping.Wrap; myPopup.Child = popupText;
Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter EditionThe Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.