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)

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 null.

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.

Identifier field


Metadata properties set to true


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
Available since 3.0
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