Reordering tasks vertically

[mappo1980]

Hi, I need to sort the tasks vertically and save the order in the database, how can I do it?

[jzzh]

I had the same problem this month. Reordering in the Left side grid is not possible.
You have to change/extend the plugin to do it, but it's quite easy.

1. Add new Event: Task Row Drag End (Grid) - Internal name "dhtmlxgantt_task_row_drag"
2. Add the event in the file plugin-dhtmlxgantt-helper.js

    //catch task ROW drag event for APEX, so that a dynamic action can be registered
    //boolean onBeforeRowDragEnd(string|number sid,string|number parent,number tindex);
    // https://docs.dhtmlx.com/gantt/api__gantt_onbeforerowdragend_event.html
    gantt.attachEvent("onBeforeRowDragEnd", function(id, parent, tindex){
        var data = {
            parent_id: gantt.getParent(id),
            task: gantt.getTask(id)
        };
        apex.event.trigger(plugin_dhtmlxGantt.chartContainerIdElement, "dhtmlxgantt_task_row_drag", data);
    });

You can now reference the new Event in a Dynamic Action.
https://docs.dhtmlx.com/gantt/api__gantt_onbeforerowdragend_event.html