Sorry, I may have not been completely clear. Again, we have the Scheduler setup to show the appropriate editors (Quick Info or Full) on a single click. Implementing your solution doesn't really fix the problem. When the user double clicks on a cell with the Scheduler setup as above, the editor still shows up. This is because, even though the user double clicks, the single click event is sent first. This causes the single click code to execute and shows the appropriate editor before I even get a chance to prevent it by returning args.cancel = true. You can see this in your demos when you double click a cell. You first temporarily see the quick info editor then you see the full editor. That is because both single and double click events are fired in this situation. Is there a way to prevent the single click event when the user double clicks.