a few updates
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DESIGN.md
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DESIGN.md
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@ -7,9 +7,13 @@
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1. Subiquity is entirely usable by pressing up, down, space (or return) and the
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occasional bit of typing.
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2. The UI never blocks. If something takes more than about 0.1s, it is done in
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the background, possibly with some kind of indication in the UI (and the
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ability to cancel if appropriate).
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2. The UI never blocks. If something takes more than about 0.1s, it is done
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in the background, possibly with some kind of indication in the UI and the
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ability to cancel if appropriate. (We should consider making sure that if
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we pop up a progress dialog while something happens -- e.g. applying
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keyboard configuration, which the user just has to wait for until going on
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to the next screen -- that the dialog appears for at least, say, 0.5s to
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avoid flickering the UI).
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3. General UX principles that it is worth keeping in mind:
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@ -168,7 +172,7 @@ us not use a background thread for absolutely every action we want to run in
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the background (there's no real reason to tie up a thread waiting for a
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subprocess to exit, for example).
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Only touch the UI from the main thread.
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A cast-iron rule: Only touch the UI from the main thread.
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### Terminal things
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@ -211,6 +215,11 @@ For "real" testing, you need to make a snap (`snapcraft snap`), mash it into an
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existing ISO using `./scripts/inject-subiquity-snap.sh`, and boot the result in
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a VM.
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There are integration tests that run daily at
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https://platform-qa-jenkins.ubuntu.com/view/server (unfortunately you need to
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be connected to the Canonical VPN -- i.e. be a Canonical staff member -- to
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see these results).
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## Development process
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When adding a new feature to subiquity, I have found it easiest to design the
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