Detect hw keyboard slide event - Page 2 - maemo.org

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Willem Liu	2010-09-13 , 11:56
Posts: 239 \| Thanked: 194 times \| Joined on Jul 2010 @ Amsterdam	#11

Originally Posted by MohammadAG

That's not exactly an event though is it, it requires you to poll the file instead of listening to the keyboard slides.

MohammadAG, hmm yes that's quite a drawback. I'll have to study lockdaemons source code to see if there is any dbus calls used there which receives the signal from the keyboard.

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lma	2010-09-13 , 11:57
Posts: 2,802 \| Thanked: 4,491 times \| Joined on Nov 2007	#12

There should also be a dbus signal (/org/freedesktop/Hal/devices/platform_slide on Diablo) so you don't need to poll /sys unnecessarily.

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Willem Liu

Willem Liu	2010-09-13 , 12:04
Posts: 239 \| Thanked: 194 times \| Joined on Jul 2010 @ Amsterdam	#13

This is for informational purposes. To monitor dbus calls live:

Code:

dbus-monitor --profile --system

Just to have all the related information in one place.

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	nicolai	2010-09-13 , 12:09
	Posts: 1,637 \| Thanked: 4,424 times \| Joined on Apr 2009 @ Germany	#14

Originally Posted by Willem Liu

MohammadAG, hmm yes that's quite a drawback. I'll have to study lockdaemons source code to see if there is any dbus calls used there which receives the signal from the keyboard.

You should listen for the dbus event, which only tells you the
state has changed. Than you read the value from
/sys/devices/platform/gpio-switch/slide/state
to see, if the slide is open or closed.

regards
Nicolai

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Willem Liu

Willem Liu	2010-09-13 , 12:14
Posts: 239 \| Thanked: 194 times \| Joined on Jul 2010 @ Amsterdam	#15

Originally Posted by nicolai

You should listen for the dbus event, which only tells you the
state has changed. Than you read the value from
/sys/devices/platform/gpio-switch/slide/state
to see, if the slide is open or closed.

regards
Nicolai

Thanks! That's good to know. It would've been great if the dbus event would've carried that information with it, but I suppose I can't have it all.

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	pelago	2010-09-13 , 12:49
	Posts: 2,121 \| Thanked: 1,540 times \| Joined on Mar 2008 @ Oxford, UK	#16

In case you haven't found it already, the initial thread for lockdaemon is http://talk.maemo.org/showthread.php?t=47439

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Willem Liu	2010-09-13 , 12:58
Posts: 239 \| Thanked: 194 times \| Joined on Jul 2010 @ Amsterdam	#17

Originally Posted by pelago

In case you haven't found it already, the initial thread for lockdaemon is http://talk.maemo.org/showthread.php?t=47439

Thanks. I did find it, but it's good to have that link here as well.

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Willem Liu	2010-09-13 , 13:55
Posts: 239 \| Thanked: 194 times \| Joined on Jul 2010 @ Amsterdam	#18

For informational purposes. Here is a quote from an answer to the same question from the qt-interest mailing list.

You can try MCE Dbus Interface. Something like:

QDBusConnection::systemBus().connect(MCE_SERVICE, MCE_SIGNAL_PATH, MCE_SIGNAL_IF, MCE_TKLOCK_MODE_SIG, this, SLOT(onTKLockModeChanged(QString)));

Where onTKLockModeChanged is a simple slot method.

Last edited by Willem Liu; 2010-09-13 at 17:55.

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fsguru	2010-09-13 , 14:12
Posts: 1 \| Thanked: 1 time \| Joined on Sep 2010	#19

Originally Posted by Willem Liu

Thanks. I did find it, but it's good to have that link here as well.

You can use the "hal" infrastructure.

ssh into the phone or run in xterm:

lshal -m

You should be able to see the hal events if you now slide the keyboard.

You can use "libhal-dev" if you program in C.

This tuttorial should help you get going:

http://madison-project.wdfiles.com/l...l_Tutorial.pdf