873668 - Orientation lock is lost when going to the homescreen and returning to an app that locks landscape orientation

Status: RESOLVED WONTFIX

(Firefox OS Graveyard :: General, defect)

Description

[Jason Smith [:jsmith]]

Devices: Inari, Unagi
Build: B2G18, 1.01 5/17/2013

STR

1. Install the Game Pack app
2. Play a game that requires landscape - Farm Lines
3. Hit the home button
4. Return to the app

Expected

The app should be locked to landscape when we return to the app.

Actual

The app is free to rotate at this point - so orientation lock is completely lost.

Comment 1

[Mounir Lamouri (:mounir)]

As said in IRC, this is likely because the app sets the orientation at run time. When that happens, if you go back to the homescreen, the orientation will be set back to portrait. When going back to the application, the orientation will not be reverted. The application should probably listen to the visibility event to set the orientation back to what it wants it to be.

Comment 2

[Jason Smith [:jsmith]]

After talking with Mounir, this isn't a blocker for 1.01. There's an easy work around for the app developer in comment 1. I'll keep this bug open for the long term solution to this problem and file a different bug to fix this within the preinstalled app.

Comment 4

[James Long (:jlongster)]

I'm making a game and this feels extremely unintuitive. When I lock the orientation, I'm locking it for *my* app, and it should always stay way. Games are very important for out platform, so I hope we can fix this sooner than later.

Comment 5

[James Long (:jlongster)]

I've added this to my code:

        document.addEventListener('visibilitychange', function() {
            if(!document.hidden) {
                screen.mozLockOrientation('landscape-primary');
            }
        });

But it doesn't seem to quite work. If I "alert" something before I lock the orientation, it works, but without it nothing happens. I'm guessing that it's trying to lock it too early, while the app is being brought back up? I also tried testing for `document.visibilityState == 'visible'` but that didn't work either.

Developers shouldn't have to worry about this, it should stay in the same orientation state that I expect.

Comment 6

[(inactive after 6/18) Alive Kuo [:alive]]

Working on 908601 and I saw this bug, taken and see if I could resolve it in the same patch.

Comment 7

[James Long (:jlongster)]

Any update on this? This is a sore spot for games right now.

Comment 8

[Ronald Claveau [:sousmangoosta]]

Could you please test to set "orientation": "landscape" in your manifest.webapp file ?

Comment 9

[James Long (:jlongster)]

Not working on games for Firefox OS anymore, sorry.

Comment 10

[BMO Automation]

Firefox OS is not being worked on