Class SetMemberOperation

class representing an undoable set member operation.

Inheritance

System.Object

Operation

SetMemberOperation

Inherited Members

System.Object.ToString()

System.Object.Equals(System.Object)

System.Object.Equals(System.Object, System.Object)

System.Object.ReferenceEquals(System.Object, System.Object)

System.Object.GetHashCode()

System.Object.GetType()

System.Object.MemberwiseClone()

Namespace: TimeCockpit.Data.UndoRedo

Assembly: TimeCockpit.Data.dll

Syntax

public class SetMemberOperation : Operation

Constructors

SetMemberOperation(String, EntityObject, Object, Object)

Initializes a new instance of the SetMemberOperation class.

Declaration

public SetMemberOperation(string propertyName, EntityObject targetEntity, object previousValue, object currentValue)

Parameters

Type	Name	Description
System.String	propertyName	the name of the property that changed.
EntityObject	targetEntity	the entity instance whose property changed.
System.Object	previousValue	the value the property had before the change.
System.Object	currentValue	the value the property had after the change.

Properties

CurrentValue

Gets the value the property has now.

Declaration

public object CurrentValue { get; }

Property Value

Type	Description
System.Object

PreviousValue

Gets the value the property had before.

Declaration

public object PreviousValue { get; }

Property Value

Type	Description
System.Object

PropertyName

Gets the name of the property this set member operation applies to.

Declaration

public string PropertyName { get; }

Property Value

Type	Description
System.String

TargetEntity

Gets the instance of the entityobject whose value was changed.

Declaration

public EntityObject TargetEntity { get; }

Property Value

Type	Description
EntityObject

Methods

Redo(ChangeTracker)

called when the operation is to be re applied.

Declaration

public override void Redo(ChangeTracker changeTracker)

Parameters

Type	Name	Description
ChangeTracker	changeTracker	the change tracker tracking this operation.

Overrides

Operation.Redo(ChangeTracker)

TryMerge(Operation, ChangeTracker)

checks whether the newer operation is also a set member operation targeting the same property of the same entity object. if so, the CurrentValue property is updated to the CurrentValue of the newerOperation and true is returned, indicating that the newer operation can be discarded.

Declaration

public override bool TryMerge(Operation newerOperation, ChangeTracker changeTracker)

Parameters

Type	Name	Description
Operation	newerOperation	the newer operation that should possibly be merged with this operation.
ChangeTracker	changeTracker	the change tracker governing this operation.

Returns

Type	Description
System.Boolean	Returns true if the newerOperation could be merged to this operation.

Overrides

Operation.TryMerge(Operation, ChangeTracker)

Undo(ChangeTracker)

called when the operation is to be undone.

Declaration

public override void Undo(ChangeTracker changeTracker)

Parameters

Type	Name	Description
ChangeTracker	changeTracker	the change tracker tracking this operation.

Overrides

Operation.Undo(ChangeTracker)