I have a "Gantt-like" task management screen on desktop, where user can choose to extend the duration of a task by dragging on either edges to move either the start date or due date. Or drag at the center of the task to pick up up and move it along the timeline without adjusting the duration.
I now need to translate this onto a tablet. Can the same set of interactions be applied for touchscreen? I'm a bit concern with the following issues:
- fat finger syndrome: The drag actions will be right next to each other, especially if a task is of a very short duration.
- accidentally adjusting task dates when user is scrolling the view. The timeline may extend beyond screen real estate and require both horizontal and vertical scrolling to see all the data.
- drag and drop behaviour is tricky to begin with on a touchscreen
Question: Is there a standard method for this sort of manipulation on a touchscreen? Or am I better off saying no direct interactions on tablets and ask users to use indirect controls with date pickers in a popover?