PrimarySelectionPolicy Class
A policy that specifies the primarily selected element.
Namespace: Microsoft.Windows.Design.Policies
Assembly: Microsoft.Windows.Design.Extensibility (in Microsoft.Windows.Design.Extensibility.dll)
Syntax
'Declaration
Public Class PrimarySelectionPolicy _
Inherits SelectionPolicy
'Usage
Dim instance As PrimarySelectionPolicy
public class PrimarySelectionPolicy : SelectionPolicy
public ref class PrimarySelectionPolicy : public SelectionPolicy
public class PrimarySelectionPolicy extends SelectionPolicy
Remarks
The PrimarySelectionPolicy class is an ItemPolicy that is enabled for the primarily selected element when SelectionTool is the active tool.
Examples
The following code example shows how to implement a custom surrogate policy for the primary selection. For a full code listing, see How to: Create a Surrogate Policy.
' The DockPanelPolicy class implements a surrogate policy that
' provides container semantics for a selected item. By using
' this policy, the DemoDockPanel container control offers
' additional tasks and adorners on its children.
Class DockPanelPolicy
Inherits PrimarySelectionPolicy
Public Overrides ReadOnly Property IsSurrogate() As Boolean
Get
Return True
End Get
End Property
Public Overrides Function GetSurrogateItems( _
ByVal item As Microsoft.Windows.Design.Model.ModelItem) _
As System.Collections.Generic.IEnumerable( _
Of Microsoft.Windows.Design.Model.ModelItem)
Dim parent As ModelItem = item.Parent
Dim e As New System.Collections.Generic.List(Of ModelItem)
If (parent IsNot Nothing) Then
e.Add(parent)
End If
Return e
End Function
End Class
// The DockPanelPolicy class implements a surrogate policy that
// provides container semantics for a selected item. By using
// this policy, the DemoDockPanel container control offers
// additional tasks and adorners on its children.
class DockPanelPolicy : PrimarySelectionPolicy
{
public override bool IsSurrogate
{
get
{
return true;
}
}
public override IEnumerable<ModelItem> GetSurrogateItems(ModelItem item)
{
ModelItem parent = item.Parent;
if (parent != null)
{
yield return parent;
}
}
}
Inheritance Hierarchy
System.Object
Microsoft.Windows.Design.Policies.ItemPolicy
Microsoft.Windows.Design.Policies.SelectionPolicy
Microsoft.Windows.Design.Policies.PrimarySelectionPolicy
Thread Safety
Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.
See Also
Reference
PrimarySelectionPolicy Members
Microsoft.Windows.Design.Policies Namespace