Class Operation

abstract base class for undoable operations within a change tracker.

Inheritance

System.Object

Operation

CreateOperation

DeleteOperation

ScopeOperation

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 abstract class Operation

Constructors

Operation()

Declaration

protected Operation()

Methods

Redo(ChangeTracker)

called when the operation is to be re applied.

Declaration

public abstract void Redo(ChangeTracker changeTracker)

Parameters

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

TryMerge(Operation, ChangeTracker)

called when the operation should possibly be merged with the preceeding operation. mainly for setmember operations. The default operation returns false, as most operations cannot be merged.

Declaration

public virtual bool TryMerge(Operation newOperation, ChangeTracker changeTracker)

Parameters

Type	Name	Description
Operation	newOperation	the other operation to merge with.
ChangeTracker	changeTracker	the change tracker governing this operation.

Returns

Type	Description
System.Boolean	Returns true if the other operation was merged into this operation and can therefore be discarded.

Undo(ChangeTracker)

called when the operation is to be undone.

Declaration

public abstract void Undo(ChangeTracker changeTracker)

Parameters

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