Undo Class
A class to enable and disable undo functionality. Undo blocks can be created during python callbacks. At the end of callbacks, any dangling undo blocks will be terminated.
Members
globalState → bool :
Is global undo enabled or not.
redoStack → list (Read Only):
A list of names for redo operations available.
state → bool (Read Only):
Is undo enabled or not.
undoStack → list (Read Only):
A list of names for undo operations available.
Methods
startBlock(name, enable=True)→ None:
Start a named undo block.
clear()→ None:
Clear undo and redo stack. This will terminate any current undo blocks.
addCallback(callback, info=None)→ None:
Add a Python callback into the undo block
- callback - user defined callback in the form of
callback(isUndo, info)- info - this argument will be passed back to user in the callback
redo()→ None:
Redo the next operation. This will terminate any current undo blocks.
undo()→ None:
Undo the last operation. This will terminate any current undo blocks.
endBlock()→ None:
Terminate an undo block.
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