Warn user before blowing away current model

[Al Hart]

I want to warn the user before blowing away the current model.

Sketchup.file_new will warn him/her if the model is dirty, but if the user hots cancel I want to stop my routine. Is there a good way to tell if the user hit cancel. (For example, if the user hits yes or no, then then a new model is now loaded - and it will not be "dirty" (changed))

And/or is there a way to find out if the model is "dirty"

[Al Hart]

Oops!

Model.modified? might have been a good idea.

I'll try this:

# check before removing current file
			Sketchup.file_new
			model = Sketchup.active_model
			if (model.modified?)
				do_error("Model not cleared - cancel")
				return
			end#if