Change the radius of a icon container ( make it a circle instead of rounder rectangle )
Background of the icon container should not be transparent - no mater of draggable transparency. This way icon is always visible.
Non-transparent background applies only on a icon and icon container. Draggable however, should still change transparency - current behavior.
Attached image shows how this implementation would work in some situations:
Non-transparent images - 100% draggable transparency
Transparent images - 100% draggable transparency
non-transparent images - 0% draggable transparency
transparent images - 0% draggable transparency
transparent images - 50% draggable transparency
Feedback icons are always visible.