is there any way to add a loader on the bottom of a Ext. Vertical Scrolling, that appear each time it’s loading something new? It’s very important to give this kind of visual feedback to the users using the vertical scroll.
What I would do is draw a group directly underneath the repeating group that is visible when the “is loading” condition is met. Inside of that group, have some sort of icon/text that indicates loading.
How man rows do you have in the initial repeating group? I haven’t looked into the exact mechanics, but I think the ext. vertical scrolling loads (adds) the same fixed number of cells each time.