Is there a means of disabling drag events?

Scheduler
#1

I receive errors when using an instance of the scheduler that should be read only. Is there a means of turning off drag/dbl click event handling in the scheduler?

TypeError: this._drag_event is undefined throws at https://…dhtmlxscheduler_timeline.js:45:403

#2

Have you reviewed the Read-only Mode
The code found in the Related Sample at the bottom does exactly this.