[Closed] using callbacks to stop a node from being deleted

this is way hacky, but you could force an undo.

fn FW_ToolsUndoDelete theNode=
(

	if theNode==FW_MotherObject and FW_DetailMode then
	(
		qDelete=queryBox "Are you sure you want to delete the Detail Area?
This cannot be undone." title:"PolySpeed Warning"
		--qDelete=false
		if not(qDelete) then
		(			
			newNode=FW_ToolsTrueCopy theNode
			FW_MotherObject=newNode
		)
		else
			callbacks.removeScripts id:#DetailDeleteProtection
	
	)
	
		
	FW_UpdateRunning #on	
)

fn FW_ToolsTrueCopy theNode =
(
	--theNode =$
	if IsValidNode theNode do
	(
		startName=theNode.name
		startWireColor=theNode.wirecolor
	
		theNode.name+="_copyTemp"
		newNode=copy theNode
		
		newNode.name=startName
		newNode.wirecolor=startWirecolor
		select newNode
		newNode
	)
)

This is cut and pasted from PolySpeed. This is the way I make sure that the user don’t delete stuff they shouldn’t delete. Basically I just copy the object and transfer the name and wirecolor to it.

Hope that helps.
/Andreas

Thanks Andreas, that works great! I just needed to add a getUserProp and setUserProp in the copy function to retain some extra data, but that was it.

–Jon