onRowDragStart

fires before the user drags a row of the grid to vertically reorder it

boolean onRowDragStart(string|number id,HTMLElement target,Event e);

id	string\|number	the id of the task that the user drags in the grid
target	HTMLElement	an HTML element of the task that the user drags
e	Event	a native event object

boolean

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

Example

gantt.attachEvent("onRowDragStart", function(id, target, e) {
    //any custom logic here
    return true;
});

Related samples

Branch ordering

Details

The event is fired when a task is moved by the mouse pointer in the left-hand grid, while the order_branch setting is enabled. If branch reordering is disabled, the event will never be called.

The event is blockable. Return false to cancel dragging.