[Apps Scope] after clicking the install button, nothing happens for some seconds

[Leo Arias]

After you click on the install button, a progress bar (with what I suppose is the download percentage) appears. However, it takes a small number of seconds between clicking the install button and the bar to appear, where nothing happens. At that point, it seems that clicking the install button didn't work and you have to do it again.

Immediately after clicking the install button, we should show an activity indicator [1], an animation or at least disable the install button to let the user know that the action is in progress and prevent him to feel the need to retry.

[1] file:///usr/share/ubuntu-ui-toolkit/doc/html/qml-ubuntu-components0-activityindicator.html

--------UX comment---------

For the latest design, please refer to the following document:
https://docs.google.com/document/d/1Ecfz4TTL65S43KR68ZIlw2A-DB8ojg2RLw7sutxpB7o/edit#heading=h.ddegpwr3preh

[Leo Arias (elopio)]

Reproduced today with the most recent image (last updated 2013-10-06) on my Nexus 4.
I clicked the install button of the Word Chain app, and it took 8 seconds to start downloading.

[Leo Arias (elopio)]

<Saviq> elopio, well, on my side it's waiting for design input
<Saviq> elopio, as in the design never took long-running actions into account
<Saviq> elopio, this can be improved scope-side with no design input
<Saviq> elopio, but long-term we need some general approach to those
<elopio> Saviq: I agree.

[dobey (dobey)]

Changing this to Invalid for the click scope, as with the new scopes API this doesn't happen. Tapping on "Install" results in an immediate preview change.

[Michał Sawicz (saviq)]

Well... if we say that the activity spinner is what makes it better, I think that's thinking about this wrong. The Install button should cause the preview to show the empty progress bar instantly.

Obviously that's a problem when we rely on the download daemon to report progress, but that approach also causes the "nothing happens when reached 100%", especially for big apps.

All in all, to get a better UX, I think we need to rework the "progress monitoring" part a bit.

[Matthew Paul Thomas (mpt)]

I just discussed this with Mike Nagle. Michal is correct: it would be much better to show an empty progress bar for a few seconds, than to replace a spinner with a progress bar.