You weren’t too specific on want in particular was supposed to be “draggable” so I included an example of changing the bar’s width as well as moving bars around the grid: Gantt_Chart.rp (86.5 KB)
Resizing the bar is just like a slider. There’s several posts on how to make them:
Moving the bar around the grid is just using Axure’s built-in “Dragged” interaction (it’s only available on dynamic panels) and the condition “Is Over Area of Widget”