Was this page helpful?
Your feedback about this content is important. Let us know what you think.
Additional feedback?
1500 characters remaining
Export (0) Print
Expand All

ToolTip.CustomPopupPlacementCallback Property

Gets or sets the delegate handler method to use to position the ToolTip.

Namespace:  System.Windows.Controls
Assembly:  PresentationFramework (in PresentationFramework.dll)

'Declaration
<BindableAttribute(False)> _
Public Property CustomPopupPlacementCallback As CustomPopupPlacementCallback

Property Value

Type: System.Windows.Controls.Primitives.CustomPopupPlacementCallback
The CustomPopupPlacementCallback delegate method that provides placement information for the ToolTip. The default is Nothing.

Identifier field

CustomPopupPlacementCallbackProperty

Metadata properties set to true

None

The Placement property must be set to Custom for the callback delegate to be used.

The CustomPopupPlacementCallback delegate returns an array of possible points that are defined with respect to the PlacementTarget. When the ToolTip is displayed, a point is chosen that maximizes the amount of the ToolTip window that is visible.

The following example shows how to set the CustomPopupPlacementCallback property and create the corresponding delegate. The same technique is used to by the Popup, which is demonstrated in the Popup Placement Sample.

			aToolTip.Placement = PlacementMode.Custom
			aToolTip.CustomPopupPlacementCallback = New CustomPopupPlacementCallback(AddressOf placeToolTip)
		Public Function placeToolTip(ByVal popupSize As Size, ByVal targetSize As Size, ByVal offset As Point) As CustomPopupPlacement()
			Dim placement1 As New CustomPopupPlacement(New Point(-50, 100), PopupPrimaryAxis.Vertical)

			Dim placement2 As New CustomPopupPlacement(New Point(10, 20), PopupPrimaryAxis.Horizontal)

			Dim ttplaces() As CustomPopupPlacement = { placement1, placement2 }
			Return ttplaces
		End Function

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1
Show:
© 2015 Microsoft