onBeforeEventChanged

fires when the event has been changed by drag-n-drop, but the changes aren't saved yet.

ev	object	the event's data object after changes
e	Event	a native event object
is_new	boolean	returns 'true', if the user changes a new event. 'false' - if the edited event already exists
original	object	the event's data object before changes

boolean

defines whether the default action of the event will be triggered (true) or canceled (false)

Example

scheduler.attachEvent("onBeforeEventChanged", function(ev, e, is_new, original){
    //any custom logic here
    return true;
});

The event occurs when a new "event" is added or an existing one is changed by drag-n-drop action.

• Beware that the 1st parameter of the handler function takes the data item object, not the data item's id (because newly created data items may not have ID yet).
• Unmodified event would be an empty object in case of creating new data items.
• The event is blockable: returning false from the handler will prevent data update.

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