Currently, creating an appointment is made by double clicking on a slot. The case of single clicking to create an appointment is already in another request.
If you take the example of Google agenda, you can create an appointment by selecting directly the dates by sweeping with one long single click.
Here would be the request:
An event similar to SchedulerEditEventArgs (containing Start, End, IsAllDay, IsNew ; IsCancelled: to be able to have a custom edit form) that would be triggered with one long single click selecting the dates/hours slots of the appointment.
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ADMIN EDIT
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Although the discussion targets different functionality, we are keeping the current request open as we consider it valid to ensure better UX for appointment creation on mobile devices and we would like to see how the demand for that goes.