GrapeCity.ActiveReports.Design.UndoManager

UndoManager Class

Manages undo and redo operations for the ActiveReports designer.

Inheritance

object

UndoManager

Implements

IDisposable

Namespace: GrapeCity.ActiveReports.Design

Assembly: MESCIUS.ActiveReports.Design.Win.dll

Syntax

public sealed class UndoManager : IDisposable

Remarks

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The UndoManager class encapsulates the functionality required to manage a history of operations performed in the ActiveReports designer, allowing users to undo and redo actions. This class interacts with an underlying undo engine to track changes and manage the undo/redo stack.

It provides methods to perform undo and redo operations, query the count of operations available for undo and redo, and retrieve descriptions of these operations for display in a user interface. The class also supports clearing the undo/redo history and raises events to notify subscribers when changes occur in the history.

This class implements the IDisposable interface to properly release resources associated with the undo engine.

Properties

Name	Description
RedoCount	Gets the number of actions currently available in the redo stack.
UndoCount	Gets the number of actions currently stored in the undo stack.

Methods

Name	Description
Clear()	Empties both the undo and redo stacks, effectively resetting the history.
Dispose()	Releases all resources used by the UndoManager.
Redo()	Reapplies the most recently undone operation from the redo stack.
RedoDescription(int)	Retrieves a description of the specified redo action in a human-readable format.
Undo()	Reverses the most recent operation in the undo stack.
UndoDescription(int)	Retrieves a description of the specified undo action in a human-readable format.

Events

Name	Description
Changed	Occurs when a change is made to the undo or redo stack, indicating that the state of the report has changed.