How to make a Cancel button for an editor script ?

I'm making an EditorWindow script, and I would like to make it cancelable by having a cancelbutton in the window when it's dooing it's stuff.
But so far I can't seem to find a way to do this.
I thought I could use StartCoroutine() en WaitForSeconds() to make the user have a chance to press the cancel button, but you can only use that in MonoBehaviours apparently.

I searched for this but I can't seem to find a solution.

And I can't believe that it's not possible
(or at least I don't want to )

 

Did you ever find out how? I need this too.

 

Can't you have the Coroutine on the monobehaviour and call it though the editor scripts .target variable?

this was my gut instinct too.

 

I dont think so, not without running the game anyway?

 

this is nice..
isRunning = !EditorUtility.DisplayCancelableProgressBar("hello", progressBarMessage, progressBar);