[sdk] There is no ListItem implementing the expansion behaviour

[Joshua Gleitze]

The expansion pattern is described here: http://design.ubuntu.com/apps/building-blocks/expansion . It is a great pattern that could be useful in many cases. Nevertheless, there is no item that somehow implements it. First of all it is confusing to find documentation about something that isn't there. Furthermore, if everybody implements the extension pattern on his own, this will lead to inconsensity.

[Calum Pringle (calumpringle)]

Agreed. Pattern requires consistent design and an SDK component.

[PS Jenkins bot (ps-jenkins)]

Fix committed into lp:ubuntu-ui-toolkit at revision 735, scheduled for release in ubuntu-ui-toolkit, milestone Unknown

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Launchpad Janitor (janitor)]

This bug was fixed in the package ubuntu-ui-toolkit - 0.1.46+13.10.20130903.3-0ubuntu1

---------------
ubuntu-ui-toolkit (0.1.46+13.10.20130903.3-0ubuntu1) saucy; urgency=low

  [ Zoltán Balogh ]
  * Reverse cherrypicking rev734.

  [ Zsombor Egri ]
  * Branch 734 removed, causing Unity test failures.

  [ Nicolas d'Offay ]
  * Added ItemSelector. Extend OptionSelector and fixed various bugs.
    Added tests for both OptionSelector and ItemSelector. (LP: #1169258,
    #1218250, #1218247)

  [ tpeeters ]
  * New toolbar reveal/hide behavior, as specified by design. (LP:
    #1207369)

  [ <email address hidden> ]
  * This MP contains some fixes to autopilot test cases. Two test cases
    are commented for now as they were giving inconsistent results on
    phone. .

  [ Ubuntu daily release ]
  * Automatic snapshot from revision 738
 -- Ubuntu daily release <email address hidden> Tue, 03 Sep 2013 11:46:19 +0000

[Daniel Holm (danielholm)]

I dont think this is fixed yet. Where is the expanded ListItem? It's not in the ui-toolkit-gallery.
And OptionSelector isn't it. I got 0.1.46+13.10.20130903.4 installed.

[kevin gunn (kgunn72)]

adding to unity8 as well...since work on dash option selector is actually feeding this for the toolkit

[Michał Sawicz (saviq)]

We're still missing a generic expandable component and a corresponding container that would ensure consistent behaviour of expandables (scrolling into view etc.).

[Roman Shchekin (mrqtros)]

I want to see expandable item too.
There are a lot of items for selecting, but no for expanding.

We need it for our RSS Reader (Shorts).

[Nicolas d'Offay (nicolas-doffay)]

My concern is if the parent object isn't a ListView or flickable? We'd need different logic to handle the scrolling then.

[Michał Sawicz (saviq)]

If there's no Flickable (which ListView inherits, btw), there's no scrolling anyway.

The ExpandingContainer would just have to be a Flickable or a ListView, is all.

[Joshua Gleitze (joshua-gleitze)]

I disagree. I think the expansion item should only provide the functionality of expansion. Any Flickables in or outside the expansion block should be left to the programmer. It's not the job of the item to make sure its content is visible. So in my opinion, we don't have to worry about any scrolling logic.

[Michał Sawicz (saviq)]

We'll have to agree to disagree. If the developers will need to cater for such behaviors themselves, it will just never happen, or be inconsistent at best. The expansion pattern is a very visible pattern in Ubuntu Touch, and needs to be consistent and predictable.

If the developer will want to, they can still use the expanding component outside of the container... but then it's just a one-line Behavior on height { } at that point.

All the expanding components within the SDK, though, need to behave consistently and cater for good user experience - without the need for users to have to hunt for the UI element they wanted to interact with.

[Joshua Gleitze (joshua-gleitze)]

Well, you have a point. Maybe it would be best to implement a default behaviour, as you say. Making this behaviour overwritable to the programmer would then increase (re-)usability, in my opinion.

[Sam Bull (dreamsorcerer)]

Is there any progress on this? I think a lot of developers are waiting on this. We can't make much more progress on our bitcoin-app project until this is completed.

[Michał Sawicz (saviq)]

Yes, Sam, see lp:~mzanetti/ubuntu-ui-toolkit/expanding-listitem if you want.

[Sam Bull (dreamsorcerer)]

How's this progressing? It looked like it was almost ready to merge a month ago, and seems to have gone silent since.

[Sam Bull (dreamsorcerer)]

Is this available yet? I don't seem to be able to use it after updating the PPA, and don't see it in the API. Are we waiting for a new UITK release?