WorkflowEditorUndo (Maximo API)

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Summary:
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Detail:
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java.lang.Object
- psdi.webclient.applet.wfcanvas.editor.WorkflowEditorUndo

All Implemented Interfaces:

WorkflowEditListener
```
public class WorkflowEditorUndo
extends java.lang.Object
implements WorkflowEditListener
```
This class handles the undo stack for the editor

Field Summary

Fields
Modifier and Type Field and Description

protected WorkflowEditor editor

protected boolean inRestore

protected java.util.Stack undoStack

Constructor Summary

Constructors
Modifier Constructor and Description

protected WorkflowEditorUndo(WorkflowEditor editor)
Constructs an undo stack assocaiated with an editor

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`protected void`	`clear()` Clears the undo stack
`protected int`	`getTopTimestamp()` Returns the time stamp of the entry on the top of the stack or zero if no entries.
`protected boolean`	`isEmpty()` Returns the state of the undo stack
`boolean`	`restoreFrame()` Restores one frame on the undo stack
`void`	`workflowChanged(WorkflowEditEvent e)` Called when the editor state changes

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - undoStack
```
protected java.util.Stack undoStack
```
  - editor
```
protected WorkflowEditor editor
```
  - inRestore
```
protected boolean inRestore
```
- Constructor Detail
  - WorkflowEditorUndo
```
protected WorkflowEditorUndo(WorkflowEditor editor)
```
    Constructs an undo stack assocaiated with an editor
    
    Parameters:
    
    editor - The editor
- Method Detail
  - clear
```
protected void clear()
```
    Clears the undo stack
  - isEmpty
```
protected boolean isEmpty()
```
    Returns the state of the undo stack
    
    Returns:
    
    Return true if the stack is empty
  - getTopTimestamp
```
protected int getTopTimestamp()
```
    Returns the time stamp of the entry on the top of the stack or zero if no entries.
    
    Returns:
    
    Time stamp of top item
  - workflowChanged
```
public void workflowChanged(WorkflowEditEvent e)
```
    Called when the editor state changes
    
    Specified by:
    
    workflowChanged in interface WorkflowEditListener
    
    Parameters:
    
    e - The WorkflowEditEvent event
  - restoreFrame
```
public boolean restoreFrame()
```
    Restores one frame on the undo stack
    
    Returns:
    
    Return true if undo done and false otherwise