Observablecollection not updating ui
This means that if the Offset animates from 6 to 7, the child’s location animates by its entire extent.
Then the child at index 7 becomes the pivotal child.
Since then, I have periodically been asked how one would go about creating a panel that behaves like the application launcher in Surface.
If you have not seen the app launcher, I would describe the panel as simply a horizontal Stack Panel that infinitely cycles its children.
In the Loop Panel class, I wanted to support both a horizontal and vertical orientation, just as Stack Panel does.
I also decided to use the same basic measuring algorithm as Stack Panel, measuring each child to infinity in the stacking direction (the orientation direction) and measuring it to the panel’s available size in the nonstacking direction.
The class supports dragging its items in a manner similar to the Surface app launcher.
Microsoft Surface was first publicly unveiled a couple of years ago.
What happens when you animate the Offset from 6 to 7, but there are only 5 children?
Well recall that the Loop Panel needs to cycle its children infinitely.
For example, a Stack Panel arranges its children sequentially, beginning with the first child and stacking subsequent children one right after the other.
However, a Loop Panel really eases the concept of a “first” child. The pivotal child is the element around which the remaining children are arranged. Then its neighboring siblings (the subsequent and preceding members of the children collection) are placed, working away from the pivotal child in both directions until all remaining visible children are arranged.