#python

import k3d

# While recording state changes for undo/redo purposes, you must ensure that errors are handled properly!

context.document.start_change_set()
try:
	if k3d.ui().query_message("Choose one ...", ["Succeed", "Fail"]) == 2:
		raise RuntimeError("Simulated error condition.")

	null_node = k3d.plugin.create("Null", context.document)
	null_node.name = "Test Node"

	context.document.finish_change_set("Test Change Set")
	k3d.ui().message("State recording completed successfully ... check the Edit menu.")

except:
	context.document.cancel_change_set()
	k3d.ui().message("State recording cancelled due to an error!")