WPF animation on a ListBox

Question

Do you know any example of how to animate the insertion of an item on a ListBox ? The effect I was thinking of is something like:

• At first we have items A and B on the ListBox .

• Than a C item is inserted between A and B .

• In the effect I imagined, before C is inserted, A and B become gradually more distant until a C element fits in between. When we reach this point, C is finnally inserted.

My problem is that, even though I already did something about templates (that I could animate), I don't know how to slowly separate two items on the ListBox .

Any ideas?

Thanks in advance

Answer 1

Insert the C item first, but with height 0 and with its content hidden (or transparent). Then animate the height of the C item to its full height: this will push A and B apart. Finally, make the content of the C item visible (or animate its opacity into visbility).