undoInfo

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Synopsis

undoInfo [-chunkName string] [-closeChunk] [-infinity boolean] [-length uint] [-openChunk] [-printQueue] [-redoName string] [-redoQueueEmpty] [-state boolean] [-stateWithoutFlush boolean] [-undoName string] [-undoQueueEmpty]

undoInfo is undoable, queryable, and NOT editable.

Return value

In query mode, return type is based on queried flag.

Related

Flags

Long name (short name)	Argument types	Properties
-state(-st)	boolean
Turns undo/redo on or off.
-infinity(-in)	boolean
Set the queue length to infinity.
-length(-l)	uint
Specifies the number of items in the undo queue. The infinity flag overrides this one.
-undoName(-un)	string
Returns what will be undone (if anything)
-redoName(-rn)	string
Returns what will be redone (if anything)
-undoQueueEmpty(-uqe)
Return true if the undo queue is empty. Return false if there is at least one command in the queue to be undone.
-redoQueueEmpty(-rqe)
Return true if the redo queue is empty. Return false if there is at least one command in the queue to be redone.
-printQueue(-pq)
Prints to the Script Editor the contents of the undo queue.
-openChunk(-ock)
Opens a chunk so that all undoable operations after this call will fall into the newly opened chunk, until close chunk is called. Once close chunk is called, all undoable operations in the chunk will undo as a single undo operation. Use with CAUTION!! Improper use of this command can leave the undo queue in a bad state.
-closeChunk(-cck)
Closes the chunk that was opened earlier by openChunk. Once close chunk is called, all undoable operations in the chunk will undo as a single undo operation. Use with CAUTION!! Improper use of this command can leave the undo queue in a bad state.
-chunkName(-cn)	string
Sets the name used to identify a chunk for undo/redo purposes when opening a chunk.
-stateWithoutFlush(-swf)	boolean
Turns undo/redo on or off without flushing the queue. Use with CAUTION!! Note that if you perform destructive operations while stateWithoutFlush is disabled, and you then enable it again, subsequent undo operations that try to go past the destructive operations may be unstable since undo will not be able to properly reconstruct the former state of the scene.

Flag can appear in Create mode of command	Flag can appear in Edit mode of command
Flag can appear in Query mode of command	Flag can be used more than once in a command.

MEL examples

// Turn undo on, with an infinite queue length
undoInfo -state on -infinity on;
// Turn undo on, with a queue length of 200
undoInfo -state on -infinity off -length 200;
// Turn undo off
undoInfo -state off;
// Query the queue length
undoInfo -q -length;
// Print the contents of the undo queue.
undoInfo -q -pq;