diff options
| author | Bastien Nocera <hadess@hadess.net> | 2011-06-06 20:05:20 +0200 |
|---|---|---|
| committer | Kay Sievers <kay.sievers@vrfy.org> | 2011-06-06 20:05:20 +0200 |
| commit | 7236c6c40a730d053141d9fe797dc65dc2ecd1f1 (patch) | |
| tree | 49105e798a26814ee5868eba60f16836f2e53056 | |
| parent | ac5c41ab70b1975d880ba86ece6f49bbc6bac44a (diff) | |
accelerometer: add documentation
| -rw-r--r-- | extras/accelerometer/accelerometer.c | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/extras/accelerometer/accelerometer.c b/extras/accelerometer/accelerometer.c index e06bf190e5..59c2a4ece3 100644 --- a/extras/accelerometer/accelerometer.c +++ b/extras/accelerometer/accelerometer.c @@ -1,10 +1,28 @@ /* * accelerometer - exports device orientation through property * + * When an "change" event is received on an accelerometer, + * open its device node, and from the value, as well as the previous + * value of the property, calculate the device's new orientation, + * and export it as ID_INPUT_ACCELEROMETER_ORIENTATION. + * + * Possible values are: + * undefined + * * normal + * * bottom-up + * * left-up + * * right-up + * + * The property will be persistent across sessions, and the new + * orientations can be deducted from the previous one (it allows + * for a threshold for switching between opposite ends of the + * orientation). + * * Copyright (C) 2011 Red Hat, Inc. - * Author: Bastien Nocera <hadess@hadess.net> + * Author: + * Bastien Nocera <hadess@hadess.net> * - * orientation_calc() from the sensorfw package: + * orientation_calc() from the sensorfw package * Copyright (C) 2009-2010 Nokia Corporation * Authors: * Üstün Ergenoglu <ext-ustun.ergenoglu@nokia.com> |