SelectionPolicy Class
A policy that makes all items in the selection available.
Namespace:
Microsoft.Windows.Design.Policies
Assembly: Microsoft.Windows.Design.Interaction (in Microsoft.Windows.Design.Interaction.dll)
The SelectionPolicy type exposes the following members.
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Context | Gets the editing context for the designer. (Inherited from ItemPolicy.) |
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IsSurrogate | Gets a value indicating whether the policy is a surrogate policy. (Inherited from ItemPolicy.) |
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PolicyItems | Gets an enumeration of items that are affected by this policy. (Overrides ItemPolicy.PolicyItems.) |
| Name | Description | |
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Equals | Determines whether the specified Object is equal to the current Object. (Inherited from Object.) |
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Finalize | Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.) |
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GetHashCode | Serves as a hash function for a particular type. (Inherited from Object.) |
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GetPolicyItems | Returns the policy items from the specified selection. |
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GetSurrogateItems | Returns an optional set of surrogate items for this item. (Inherited from ItemPolicy.) |
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GetType | Gets the Type of the current instance. (Inherited from Object.) |
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IsInPolicy | Gets a value indicating whether the specified item is to be included in the policy. |
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MemberwiseClone | Creates a shallow copy of the current Object. (Inherited from Object.) |
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OnActivated | Called when this policy is activated. (Overrides ItemPolicy.OnActivated().) |
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OnDeactivated | Called when this policy is deactivated. (Overrides ItemPolicy.OnDeactivated().) |
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OnPolicyItemsChanged | Raises the PolicyItemsChanged event. (Inherited from ItemPolicy.) |
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ToString | Returns a string that represents the current object. (Inherited from Object.) |
| Name | Description | |
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PolicyItemsChanged | Occurs when the policy changes. (Inherited from ItemPolicy.) |
Derive from this policy and override the IsInPolicy and GetPolicyItems methods to filter the selection as necessary.
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 : 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; } } }
