CogChangedEventBase Class

Cognex VisionPro 9.20

A base class that implements the ICogChangedEvent interface. Objects that derive from this class will raise the Changed event whenever part of the object's state has changed.

Inheritance Hierarchy

Namespace: Cognex.VisionPro.Implementation
Assembly: Cognex.VisionPro (in Cognex.VisionPro.dll) Version: 80.0.0.0 (80.0.0.0)

Syntax

C++

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[SerializableAttribute]
public class CogChangedEventBase : CogObjectBase, 
	ICogChangedEvent

[SerializableAttribute]
public class CogChangedEventBase : CogObjectBase, 
	ICogChangedEvent

<SerializableAttribute>
Public Class CogChangedEventBase 
	Inherits CogObjectBase 
	Implements ICogChangedEvent

<SerializableAttribute>
Public Class CogChangedEventBase 
	Inherits CogObjectBase 
	Implements ICogChangedEvent

[SerializableAttribute]
public ref class CogChangedEventBase : public CogObjectBase, 
	ICogChangedEvent

[SerializableAttribute]
public ref class CogChangedEventBase : public CogObjectBase, 
	ICogChangedEvent

The CogChangedEventBase type exposes the following members.

Constructors

	Name	Description
	CogChangedEventBase

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Methods

	Name	Description
	CreateObjRef	Creates an object that contains all the relevant information required to generate a proxy used to communicate with a remote object. (Inherited from MarshalByRefObject.)
	Equals	Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
	Finalize	Allows an Object to attempt to free resources and perform other cleanup operations before the Object is reclaimed by garbage collection. (Inherited from Object.)
	GetAttributes	Implements the corresponding member of the ICustomTypeDescriptor interface. May be overridden in derived classes to provide custom type information. (Inherited from CogObjectBase.)
	GetClassName	Implements the corresponding member of the ICustomTypeDescriptor interface. May be overridden in derived classes to provide custom type information. (Inherited from CogObjectBase.)
	GetComponentName	Implements the corresponding member of the ICustomTypeDescriptor interface. May be overridden in derived classes to provide custom type information. (Inherited from CogObjectBase.)
	GetConverter	Implements the corresponding member of the ICustomTypeDescriptor interface. May be overridden in derived classes to provide custom type information. (Inherited from CogObjectBase.)
	GetDefaultEvent	Implements the corresponding member of the ICustomTypeDescriptor interface. May be overridden in derived classes to provide custom type information. (Inherited from CogObjectBase.)
	GetDefaultProperty	Implements the corresponding member of the ICustomTypeDescriptor interface. May be overridden in derived classes to provide custom type information. (Inherited from CogObjectBase.)
	GetEditor	Implements the corresponding member of the ICustomTypeDescriptor interface. May be overridden in derived classes to provide custom type information. (Inherited from CogObjectBase.)
	GetEvents	Implements the corresponding member of the ICustomTypeDescriptor interface. May be overridden in derived classes to provide custom type information. (Inherited from CogObjectBase.)
	GetEvents( Attribute )	Implements the corresponding member of the ICustomTypeDescriptor interface. May be overridden in derived classes to provide custom type information. (Inherited from CogObjectBase.)
	GetHashCode	Serves as a hash function for a particular type. (Inherited from Object.)
	GetLifetimeService	Retrieves the current lifetime service object that controls the lifetime policy for this instance. (Inherited from MarshalByRefObject.)
	GetProperties	Implements the corresponding member of the ICustomTypeDescriptor interface. May be overridden in derived classes to provide custom type information. (Inherited from CogObjectBase.)
	GetProperties( Attribute )	Implements the corresponding member of the ICustomTypeDescriptor interface. May be overridden in derived classes to provide custom type information. (Inherited from CogObjectBase.)
	GetPropertyOwner	Implements the corresponding member of the ICustomTypeDescriptor interface. May be overridden in derived classes to provide custom type information. (Inherited from CogObjectBase.)
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	InitializeLifetimeService	Obtains a lifetime service object to control the lifetime policy for this instance. (Inherited from MarshalByRefObject.)
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	MemberwiseClone(Boolean)	Creates a shallow copy of the current MarshalByRefObject object. (Inherited from MarshalByRefObject.)
	OnChanged(Int64)	This method should be called internally whenever the object's state may have changed.
	OnChanged(CogChangedEventArgs)	This method may be called internally whenever a derived object's state may have changed and the derived object expresses this change via a derived CogChangedEventArgs class.
	ResumeAndRaiseChangedEvent	Re-enables raising of the Changed event after SuspendChangedEvent has been called, and raises the Changed event if the ChangedEventSuspended count is reduced to zero and any changes were made while events were suspended. Must be called once for each call to SuspendChangedEvent.
	SuspendChangedEvent	Temporarily suspends the raising of the Changed event. May be called more than once, and a corresponding call to ResumeAndRaiseChangedEvent must be made for each call to SuspendChangedEvent.
	ToString	Returns a String that represents the current Object. (Inherited from Object.)

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Fields

	Name	Description
	SfNextSf	The next state flag value to be used by a derived class.

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Properties

	Name	Description
	ChangedEventSuspended	If nonzero, indicates that the raising of the Changed event has been suspended. This value is incremented when SuspendChangedEvent is called and decremented when ResumeAndRaiseChangedEvent is called.
	StateFlags	Returns the complete set of state flags supported on this object. The flags may be indexed by name as shown in the following C# code snippet: if (changedObject.StateFlags["Color"] & eventArgs.StateFlags) { ... }

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Events

	Name	Description
	Changed	This event is raised when one or more parts of the object's state may have changed.

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Remarks

Classes can most easily implement the ICogChangedEvent interface by deriving from this class. However in some cases a class may need to derive from some other base class, so the actual implementation of the ICogChangedEvent behavior is provided by the class that can be used by delegation rather than by inheritance.