Jumping to top of Listview programatically

A

Andras

Active Member
Licensed User
Longtime User
The heading says it all; I have a Listview within a Scrollview, and all works fine, but how can I ensure that the top item is the one which is always visible when the list is shown?

Thanks!

John
 
Sort by date Sort by votes
A

Andras

Active Member
Licensed User
Longtime User
Thanks, Desolate.

I note that SetSelection isn't listed among the members in the Guide, though it does appear as an item in the pop-ups.

More seriously, it doesn't actually seem to do what I want (or anything, actually!) which is to ensure that if the user scrolls down to the bottom of a long list of items, then backs out, then returns with a short list, those few items will be immediately visible, rather than having disappeared off the top of the ListView.

So now I'm really puzzled!

John
 
Upvote 0

thedesolatesoul

Expert
Licensed User
Longtime User
Oh, I didnt notice you have a listview inside a scrollview!
I tried that, and the listview cannot scroll, but you can set the topmost item with SetSelection.
klaus is right, you need to use ScrollPosition.
Btw...it is not a great idea to have a listview inside a scrollview since the listview size can change dynamically.
 
Upvote 0
A

Andras

Active Member
Licensed User
Longtime User
Yes, ScrollPosition works. Many thanks!

The situation is that I have a list which is longer than the screen, so is accommodated within a ScrollView; I can control the ListView size appropriately, so there seem to be no problems there, though I accept that it may be a bit of a kludge.

But is there a better way of achieving the same result? As must be obvious, I'm really still finding my feet in this environment!

John
 
Upvote 0
A

Andras

Active Member
Licensed User
Longtime User
thedesolatesoul said:
You do realise that a ListView is scrollable on its own without a scrollview?
Click to expand...

Indeed - it just seemed the simplest way to control its appearance on the screen at the time I was writing it, especially as I was just getting to grips with scrollview at the time!

John
 
Upvote 0

klaus

Expert
Licensed User
Longtime User
There is no reason to have a ListView in a Scrollview.
You should use either a ListView, faster but with limitations (two labels and a bitmap), or a ScrollView somewhat slower but much more versatile (almost everything is possible).

Best regards.
 
Upvote 0
You must log in or register to reply here.
Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…