Any morph
widget is too slow to display more than a couple of
hundred elements. The MorphTreeMorph is no exception.
What's more, when you have more than a couple of hundred, you do
not really need to see them all, because you want to manipulate
them via a query.
The filter just hides the data, but you can still manipulate it.
So, you actually do not lose much. A better approach would be to
have a list that expands automatically once you get at the bottom
of the visible items.
Yes, certainly it's a better approach, because before running a
query, just browsing through the list can help you formulate the
query.
I see there is like a tag 'there are hidden elements', is it
possible to make it behave like a button so that it expands the
list (like the next 50 items or the full list?)
Did you try pressing it? :) At the moment it expands the whole list,
which is not too great. Furthermore, the label does not update yet.
But, these will change.