How to update parent progress automatically?

Gantt
#1

I am using gantt chart as in the example dhtmlx.com/docs/products/dhtmlxG … basic.html
I need to update the progress percentage of parent with its child values,Is possible to do like that?

When a sub task’s progress is updated,Then the progress of its parent is automatically updated based on the progress of child tasks.

#2

Hi,
there is no built-in method, but you can catch the event when a task has been modified. Then you could retrieve a chain of parent tasks and recalculate their progress
docs.dhtmlx.com/gantt/api__gantt … event.html
docs.dhtmlx.com/gantt/api__gantt … event.html
docs.dhtmlx.com/gantt/api__gantt … event.html
docs.dhtmlx.com/gantt/api__gantt_gettask.html
docs.dhtmlx.com/gantt/api__gantt_updatetask.html

var parent = gantt.getTask(task.parent); parent.progress = some_value; gantt.updateTask(parent.id);

#3

You can try this :

gantt.attachEvent("onAfterTaskUpdate", function(id,item){
		if (item.parent == 0) {
			return;
		}
		
		var parentTask = gantt.getTask(item.parent); //console.log(parent.id);return;
		
		var childs = gantt.getChildren(parentTask.id);
		var totProgress = 0;
		
		var tempTask;
		for (i = 0; i < childs.length; i++) { //console.log(childs[i]);
			tempTask = gantt.getTask(childs[i]);
			totProgress += parseFloat(tempTask.progress);
		}
		//console.log(totProgress);
		
		parentTask.progress = (totProgress / childs.length).toFixed(2);
		gantt.updateTask(parentTask.id);
	});
#4

this code works only

in this hierarchy

parent task 10
sub task parent 40
sub task 42

but not ( see the attachment )

parent task 10
sub task 40
sub task 42
sub task 44

Untitled-1.jpg2000×1000 225 KB

#5

Hi,
please provide some kind of demo. The issue seems to be caused by something in the data you have in a chart.
You can try reproducing the error using this tool:
docs.dhtmlx.com/gantt/snippet/8b862977

#6

it works perfectly using your snippet area, thanks let me examine again why this is happening