Class HistoryManager

Manager used to record all user actions to return to primary document.

Inheritance

System.Object

Service

HistoryManager

Inherited Members

Service.OnPause()

Service.OnResume()

Service.OnStart()

Service.Pause()

Service.Paused

Service.Resume()

Service.Resumed

Service.ServiceStatus

Service.Start()

Service.Started

Service.Stop()

Service.Stopped

System.Object.Equals(System.Object)

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

System.Object.GetHashCode()

System.Object.GetType()

System.Object.MemberwiseClone()

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

System.Object.ToString()

Namespace: Syncfusion.Windows.Forms.Diagram

Assembly: Syncfusion.Diagram.Base.dll

Syntax

public class HistoryManager : Service

Constructors

HistoryManager(Model)

Initializes a new instance of the HistoryManager class.

Declaration

public HistoryManager(Model model)

Parameters

Type	Name	Description
Model	model	The model.

Fields

m_history

Declaration

protected HistoryList m_history

Field Value

Type
HistoryList

Properties

CanRedo

Gets a value indicating whether this instance can redo last backup user operation.

Declaration

public bool CanRedo { get; }

Property Value

Type	Description
System.Boolean	true if this instance can redo; otherwise, false.

CanUndo

Gets a value indicating whether this instance can undo last operation.

Declaration

public bool CanUndo { get; }

Property Value

Type	Description
System.Boolean	true if this instance can undo; otherwise, false.

Enabled

Gets or sets a value indicating whether the history services is enabled or disabled.

Declaration

public bool Enabled { get; set; }

Property Value

Type
System.Boolean

Methods

AddHistoryEntry(ICommand)

Adding new entry into the history entry list

Declaration

public void AddHistoryEntry(ICommand cmdNewEntry)

Parameters

Type	Name	Description
ICommand	cmdNewEntry	The new command

CanMerge(ICommand)

Determines whether this instance can merge the specified command.

Declaration

public bool CanMerge(ICommand cmd)

Parameters

Type	Name	Description
ICommand	cmd	The command.

Returns

Type	Description
System.Boolean	true if this instance can merge the specified command to one; otherwise, false.

ClearHistory()

Clear all the history records.

Declaration

public void ClearHistory()

EndAtomicAction()

Stop recording changes and save command to history.

Declaration

public void EndAtomicAction()

GetRedoDescriptions(Int32, out String[])

Gets HistoryEntries Descriptions.

Declaration

public int GetRedoDescriptions(int nDepth, out string[] strCmdDescriptions)

Parameters

Type	Name	Description
System.Int32	nDepth	Depth proceed.
System.String[]	strCmdDescriptions	string array which holds descriptions

Returns

Type	Description
System.Int32	Number of returned descriptions.

GetUndoDescriptions(Int32, out String[])

Gets HistoryEntries Descriptions.

Declaration

public int GetUndoDescriptions(int nDepth, out string[] strCmdDescriptions)

Parameters

Type	Name	Description
System.Int32	nDepth	Depth proceed.
System.String[]	strCmdDescriptions	string array which holds descriptions

Returns

Type	Description
System.Int32	Number of returned descriptions.

Merge(ICommand)

Merges the specified command to one.

Declaration

public void Merge(ICommand cmdToMerge)

Parameters

Type	Name	Description
ICommand	cmdToMerge	The command to merge.

OnRecordComplete(EventArgs)

Raises the RecordComplete event.

Declaration

protected virtual void OnRecordComplete(EventArgs evtArgs)

Parameters

Type	Name	Description
System.EventArgs	evtArgs	The System.EventArgs instance containing the event data.

OnRecordRequest(EventArgs)

Raises the RecordRequest event.

Declaration

protected virtual void OnRecordRequest(EventArgs evtArgs)

Parameters

Type	Name	Description
System.EventArgs	evtArgs	The System.EventArgs instance containing the event data.

OnRedoCommandCompleted(EventArgs)

Raises the RedoCommandCompleted event.

Declaration

protected virtual void OnRedoCommandCompleted(EventArgs evtArgs)

Parameters

Type	Name	Description
System.EventArgs	evtArgs	The System.EventArgs instance containing the event data.

OnRedoCommandStarted(EventArgs)

Raises the RedoCommandStarted event.

Declaration

protected virtual void OnRedoCommandStarted(EventArgs evtArgs)

Parameters

Type	Name	Description
System.EventArgs	evtArgs	The System.EventArgs instance containing the event data.

OnStop()

Called when history are stopped.

Declaration

protected override void OnStop()

Overrides

Service.OnStop()

OnUndoCommandCompleted(EventArgs)

Raises the UndoCommandCompleted event.

Declaration

protected virtual void OnUndoCommandCompleted(EventArgs evtArgs)

Parameters

Type	Name	Description
System.EventArgs	evtArgs	The System.EventArgs instance containing the event data.

OnUndoCommandStarted(EventArgs)

Raises the UndoCommandStarted event.

Declaration

protected virtual void OnUndoCommandStarted(EventArgs evtArgs)

Parameters

Type	Name	Description
System.EventArgs	evtArgs	The System.EventArgs instance containing the event data.

RecordCollectionChanged(CollectionExChangeType, CollectionEx, ICollection, Int32)

Record the collection changed action.

Declaration

public void RecordCollectionChanged(CollectionExChangeType changeType, CollectionEx collection, ICollection elements, int nIndex)

Parameters

Type	Name	Description
CollectionExChangeType	changeType	Type of the change.
CollectionEx	collection	The changed collection.
System.Collections.ICollection	elements	The elements of collection.
System.Int32	nIndex	The elements insert index.

RecordMoveHandle(PathNode)

Record the handler move action.

Declaration

public void RecordMoveHandle(PathNode pathNode)

Parameters

Type	Name	Description
PathNode	pathNode	The handler container.

RecordMovePinPoint(IPropertyContainer, String, String, SizeF)

Record the move pin point action.

Declaration

public void RecordMovePinPoint(IPropertyContainer propertyContainer, string strPropertyContainerName, string strPropertyName, SizeF szMoveOffset)

Parameters

Type	Name	Description
IPropertyContainer	propertyContainer	The property container.
System.String	strPropertyContainerName	Name of the container.
System.String	strPropertyName	Name of the property.
System.Drawing.SizeF	szMoveOffset	The pin point move offset.

RecordPropertyChanged(IPropertyContainer, String, String)

Record the property changed action.

Declaration

public void RecordPropertyChanged(IPropertyContainer propertyContainer, string strPropertyContainerName, string strPropertyName)

Parameters

Type	Name	Description
IPropertyContainer	propertyContainer	The property container.
System.String	strPropertyContainerName	Name of the property container.
System.String	strPropertyName	Name of the property.

RecordSetGraphicsPath(PathNode, GraphicsPath, GraphicsPath, Boolean)

Record the set graphics path action.

Declaration

public void RecordSetGraphicsPath(PathNode nodePath, GraphicsPath pathCurrent, GraphicsPath pathToCombineWith, bool bConnect)

Parameters

Type	Name	Description
PathNode	nodePath	The graphics path owner.
System.Drawing.Drawing2D.GraphicsPath	pathCurrent	The path current.
System.Drawing.Drawing2D.GraphicsPath	pathToCombineWith	The path to combine with.
System.Boolean	bConnect	if set to true path end points need to connect.

RecordSetPoints(PathNode)

Record the set points action.

Declaration

public void RecordSetPoints(PathNode nodePath)

Parameters

Type	Name	Description
PathNode	nodePath	The path points owner.

RecordVertexChanged(PathNode, VertexChangeType, Int32, PointF)

Record the vertex changed.

Declaration

public void RecordVertexChanged(PathNode nodeVertexContainer, VertexChangeType changeType, int nVertexIdx, PointF ptNewLocation)

Parameters

Type	Name	Description
PathNode	nodeVertexContainer	The node vertex container.
VertexChangeType	changeType	Type of the change.
System.Int32	nVertexIdx	The vertex index in path points array.
System.Drawing.PointF	ptNewLocation	The new vertex location.

RecordZorderChanged(Node, ZOrderUpdate)

Record the zOrder changed value.

Declaration

public void RecordZorderChanged(Node nodeChanged, ZOrderUpdate changeType)

Parameters

Type	Name	Description
Node	nodeChanged	The node changed.
ZOrderUpdate	changeType	Type of the change.

Redo()

Step forward to operation history records.

Declaration

public bool Redo()

Returns

Type	Description
System.Boolean	true, if redo.

StartAtomicAction(String)

Start record any changes to history command.

Declaration

public void StartAtomicAction(string strDescription)

Parameters

Type	Name	Description
System.String	strDescription	The short command description.

Undo()

Backup last user operation.

Declaration

public bool Undo()

Returns

Type	Description
System.Boolean	true, if undo.

Events

RecordComplete

Occurs when record complete.

Declaration

public event EventHandler RecordComplete

Event Type

Type
System.EventHandler

RecordRequest

Occurs when record request.

Declaration

public event EventHandler RecordRequest

Event Type

Type
System.EventHandler

RedoCommandCompleted

Occurs when redo command completed.

Declaration

public event EventHandler RedoCommandCompleted

Event Type

Type
System.EventHandler

RedoCommandStarted

Occurs when redo command started.

Declaration

public event EventHandler RedoCommandStarted

Event Type

Type
System.EventHandler

UndoCommandCompleted

Occurs when undo command completed.

Declaration

public event EventHandler UndoCommandCompleted

Event Type

Type
System.EventHandler

UndoCommandStarted

Occurs when undo command started.

Declaration

public event EventHandler UndoCommandStarted

Event Type

Type
System.EventHandler