EmptySelection Class

Artikel
11/24/2013

Handles empty selections.

Inheritance Hierarchy

System.Object
Microsoft.VisualStudio.Modeling.Diagrams.SelectionState
Microsoft.VisualStudio.Modeling.Diagrams.EmptySelection

Namespace: Microsoft.VisualStudio.Modeling.Diagrams
Assembly: Microsoft.VisualStudio.Modeling.Sdk.Diagrams.12.0 (in Microsoft.VisualStudio.Modeling.Sdk.Diagrams.12.0.dll)

Syntax

'Declaration
Public Class EmptySelection _
    Inherits SelectionState

public class EmptySelection : SelectionState

public ref class EmptySelection : public SelectionState

type EmptySelection =  
    class 
        inherit SelectionState 
    end

public class EmptySelection extends SelectionState

The EmptySelection type exposes the following members.

Constructors

	Name	Description
	EmptySelection	constructor

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Properties

	Name	Description
	ActualSelection	Gets the actual selection. (Inherited from SelectionState.)
	CoercedSelection	We need to return an empty collection here to cause a coercion failure. This is a bit odd, but necessary given implementation of SelectionState.IsCoercionFailure. (Overrides SelectionState.CoercedSelection.)
	CoercedSelectionCache	(Inherited from SelectionState.)
	CoercedSelectionModelElements	It is possible for the CoercedSelection to include Pels and Mels which are associated with Pels that are not already included. This method returns a list that replaces the Pels in the coerced selection with their associated Mels, plus any mels from the coerced selection that did not have pels. (Inherited from SelectionState.)
	CoercedSelectionPresentationElements	It is possible for the CoercedSelection to include Pels and Mels which are associated with Pels that are not already included. This method returns a collection which excludes any Mels. (Inherited from SelectionState.)
	CoercionCompliantSelection	Returns the list of selected objects which comply with the coercion rules. If the selection is coercable, then the coerced selection will be returned; if there is a coercion failure the list will be empty. If there are no coercion rules (!IsCoercable), then the actual selection is returned. (Inherited from SelectionState.)
	HasCoercion	Determines if the selection has a valid coercion. (Inherited from SelectionState.)
	Instance	Singleton EmptySelection instance
	IsActualSelectionMixed	True if all selected objects in the actual selection are of the same type. (Inherited from SelectionState.)
	IsCoercedSelectionMixed	True if all selected objects in the coerced selection are of the same type. (Inherited from SelectionState.)
	IsCoercible	Determines if the actual selection can be coerced. Togegher IsCoercible and IsCoercionFailure distinguish between coercion failure, and no coercion available. (Inherited from SelectionState.)
	IsCoercionFailure	Togegher IsCoercible and IsCoercionFailure distinguish between coercion failure, and no coercion available. (Inherited from SelectionState.)

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Methods

	Name	Description
	CacheCoercedSelection	Cache the specified collection. (Inherited from SelectionState.)
	Equals	Determines whether the specified object is equal to the current object. (Inherited from Object.)
	Finalize	Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
	GetHashCode	Serves as the default hash function. (Inherited from Object.)
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	IdentifyCommandsToBeFilteredOutForMultipleSelection	Override to identify the commands which are not valid in a single selection scenario, for this selection state. (Inherited from SelectionState.)
	IdentifyCommandsToBeFilteredOutForSingleSelection	Override to identify the commands which are not valid in a single selection scenario, for this selection state. (Inherited from SelectionState.)
	Initialize	specifies the actual selection to operate upon. (Inherited from SelectionState.)
	IsApplicable	Determines if this selection state is appropriate for use with the specified selection. (Overrides SelectionState.IsApplicable(ICollection).)
	IsCommandToBeFilteredOut	True if the specified command should not be enabled for this selection state. The method is evaluated for the coerced selection. (Inherited from SelectionState.)
	IsCommandToBeFilteredOutForMultipleSelection	True if the specified command should not be enabled for this selection state. The method is evaluated for the coerced selection. (Inherited from SelectionState.)
	IsCommandToBeFilteredOutForSingleSelection	True if the specified command should not be enabled for this selection state. The method is evaluated for the coerced selection. (Inherited from SelectionState.)
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	ToString	Returns a string that represents the current object. (Inherited from Object.)

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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.

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