[maemo-developers] How to block the camera app from starting on lens cover open

[From: Faheem Pervez]

Hi,

http://maemo.org/community/maemo-developers/intercept_camera_slider_open_event_to_default_camera_app--n900/
suggests to do what BlessN900 currently does.

Best regards,
Faheem

On 23/07/2010, Martin Storsjö <martin at martin.st> wrote:
> Hi,
>
> I'm developing an app that uses the camera, and aiming for Ovi Store.
>
> One of the issues that Ovi QA complained about is that if the lens cover
> isn't opened, I should add a banner saying that to the user. That's easy
> enough, but when the user actually opens the lens cover, the camera app
> opens (but since my app has grabbed the camera, fails to start). Is there
> any way to block this while my app is running - since if the user has
> started my app, and my app displays a banner telling the user to open the
> lens cover, the user obviously don't want the camera app to start.
>
> I've tried to explore different ways to accomplish this, but most of them
> requires the app to run as root. One really simple way would be to do
>
> echo 1 > /sys/devices/platform/gpio-switch/cam_shutter/disable
>
> but that obviously requires root. I also tried to check what other apps,
> such as shortcutd do, but they don't seem to work as intended with the
> camera button on PR 1.2. Other ways to accomplish it would be to
> reroute/remove the signals, as outlined here:
>
> http://talk.maemo.org/showpost.php?p=495516&postcount=72
>
> But that requires root, too. And if the camera-ui process is killed, it
> respawns immediately.
>
> Any hints on how to solve this in the best way? I don't want my app to
> fail in the next QA round with the reason "camera app is launched and
> closes immediately if the lens cover is opened while your app is running".
>
> I guess I should discuss this issue with Ovi Publisher Support, too, but I
> don't really expect to get coding hints from there.
>
> // Martin
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