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Issue 862838 link

Starred by 3 users
Status: Available
Owner: ----
Cc:
shend@chromium.org
omrilio@chromium.org
█ blakeo@chromium.org
yhanada@chromium.org
pcovell@chromium.org
█ dvallet@chromium.org
Components:
EstimatedDays: ----
NextAction: ----
OS: Chrome
Pri: 3
Type: Bug



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Transition from PIN to VK in lock screen is not smooth.

Project Member Reported by shend@chromium.org, Jul 12 
Chrome Version: 69.0.3488.0
OS: ChromeOS Eve

What steps will reproduce the problem?
(1) Go to lock screen with an account that has PIN.
(2) Tap the password field to bring up VK.

What is the expected result?
The PIN disappearing and the keyboard appearing.

What happens instead?
Some jittering in the transition from PIN to VK.

See attached video.
lockscreen.webm
751 KB View Download

Comment 1 by shend@chromium.org, Aug 3 

There are three observers that change the lock screen when the keyboard appears:

1. LockContentsView: To remove the PIN pad and relayout.
2. ShelfLayoutManager: To hide the shelf?
3. LockLayoutManager: Triggers a resize of the lock screen.

Not 100% sure, but I think the jitter comes from 1 occurring before 2 & 3. Ideally we could prevent 1 from repainting immediately and wait for 2 & 3. Not quite sure what to do here.

Comment 2 by shend@chromium.org, Sep 12

Cc: shend@chromium.org
Owner: ----
Status: Available (was: Assigned)
►

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