I have found that having users slide the progress slider left and right with an increment of 1 is hard for them to get the right % if the task bar is short.
This is working to increment the progress in intervals of 5…is there another way to do this with the API?
gantt.attachEvent("onTaskDrag", function(id, mode, task, original){
if (mode == gantt.config.drag_mode.progress)
{
task.progress = 5*(Math.round(task.progress*100/5))/100;
}
});