Package mrv :: Package maya :: Module undo :: Class GenericOperationStack

Class GenericOperationStack

object --+    
         |    
 Operation --+
             |
            GenericOperationStack

Operation able to undo generic callable commands (one or multiple). It would be used whenever a simple generic operatino is not sufficient

In your api command, create a GenericOperationStack operation instance, add your (mel) commands that should be executed in a row as Call. To apply them, call doIt once (and only once !). You can have only one command stored, or many if they should be executed in a row. The vital part is that with each do command, you supply an undo command. This way your operations can be undone and redone once undo / redo is requested

Notes:

this class works well with mrv.util.Call
to execute the calls added, you must call doIt or addCmdAndCall - otherwise the undoqueue might brake if exceptions occour !
your calls may use MEL commands safely as the undo-queue will be torn off during execution
Undocommand will be applied in reversed order automatically

Instance Methods

[hide private]

__init__(self)
intiialize our variables

source code

doIt(self)
Call all doIt commands stored in our instance after temporarily disabling the undo queue

source code

undoIt(self)
Call all undoIt commands stored in our instance after temporarily disabling the undo queue

source code

addCmd(self, doCall, undoCall)
Add a command to the queue for later application

source code

addCmdAndCall(self, doCall, undoCall)
Add commands to the queue and execute it right away - either always use this way to add your commands or the addCmd method, never mix them !

source code

Inherited from object: __delattr__, __format__, __getattribute__, __hash__, __new__, __reduce__, __reduce_ex__, __repr__, __setattr__, __sizeof__, __str__, __subclasshook__