Restrict child task to be dragged problem

Gantt
#1

I have used the code which restricts child task to be dragged before and after parent task. When I drag within day time scale, it is fine. However, when I drag within week, month and year scales, the child task can be dragged before parent task for 1 day or two days, and after parent task for 1 day or two days too. How to prevent it? This is my code:

[code]gantt.attachEvent(“onTaskDrag”, function(id, mode, task, original){
var modes = gantt.config.drag_mode;
var parent = gantt.getTask(task.parent);
if(mode == modes.move || mode == modes.resize){

                var diff = original.duration*(1000*60*60*24);
         
                if(+task.end_date > +parent.end_date){
                    task.end_date = new Date(parent.end_date);
                    if(mode == modes.move)
                        task.start_date = new Date(task.end_date - diff);
                    }
                if(+task.start_date < +parent.start_date){
                    task.start_date = new Date(parent.start_date);
                    if(mode == modes.move)
                        task.end_date = new Date(+task.start_date + diff);
                }
            }                
            return true;
        });         [/code]
#2

sorry, is dragged beyond before parent task and beyond after parent task. Forget to mention beyond.

#3

Hello,
try the latest build of the component from this post, your code seems working correctly with it
viewtopic.php?f=15&t=20507&start=10