UndoRedoModel

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Class UndoRedoModel

Object
   |
   +--OObject
         |
         +--Observer
               |
               +--Model
                     |
                     +--ListModel
                           |
                           +--DequeModel
                                 |
                                 +--UndoRedoModel

class UndoRedoModel
extends DequeModel

This class encapsulates the data model for the Command Dequeue which supports deep undo and redo. NOTE: This logic invokes the "synchronized" version of the Command API.
Author: Bruce Wallace (PolyGlotInc.com)
Defined in mvc.js

Version: 1.0

Constructor Summary
`UndoRedoModel ()`

Method Summary
`String`	`cmdDesc(i)` iff command index is defined, return command description
`String`	`hasReDo()` iff there is another redo-able command return its description
`String`	`hasUnDo()` iff there is another undo-able command return its description
`void`	`konstructor()`
`void`	`newDo(c)` Add a new command object to the top of the "stack" and "do" it.
`void`	`reDo( )` "unpop the top" command object and "redo" it.
`void`	`unDo( )` "pop the top" command object and "undo" it.

Methods inherited from class DequeModel



_reset, addFirst, addLast, delFirst, delLast, enqueue, dequeue, push, pop, top, upIndex, _up, downIndex, _down, _cutback

Methods inherited from class ListModel



dump, _pop, _push, getCount, getItem, getItemStr, addItem, reset, iterate, addBefore

Methods inherited from class Model



dumpSubscribers, toString, dirty, clean, neverChanged, publish, GET, _SET, SET, updateStamp, BeginTransaction, EndTransaction, addObserver, delObserver, notifyObservers

Methods inherited from class Observer



update, subscribe

Constructor Detail

UndoRedoModel

UndoRedoModel()

Author:

Version:

Method Detail

cmdDesc

String cmdDesc(i)

iff command index is defined, return command description

hasReDo

String hasReDo()

iff there is another redo-able command return its description

hasUnDo

String hasUnDo()

iff there is another undo-able command return its description

konstructor

void konstructor()

Parameters:

optName

newDo

void newDo(c)

Add a new command object to the top of the "stack" and "do" it.

reDo

void reDo( )

"unpop the top" command object and "redo" it.

unDo

void unDo( )

"pop the top" command object and "undo" it.