102 lines
2.7 KiB
Plaintext
102 lines
2.7 KiB
Plaintext
|
#
|
||
|
|
# NCD input event handling example program.
|
||
|
|
#
|
||
|
|
# This program responds to volume key presses by synchronously calling an external
|
||
|
|
# script for muting and adjusting volume, and responds to power button presses by
|
||
|
|
# suspending using pm-suspend.
|
||
|
|
#
|
||
|
|
# It uses process_manager() and sys.watch_input() to dynamically create and remove
|
||
|
|
# processes that deal with specific input devices. The individual input device processes
|
||
|
|
# then use sys.evdev() to handle input events from their input device.
|
||
|
|
#
|
||
|
|
|
||
|
|
process events_main {
|
||
|
|
# Volume control script, called with argument "up", "down" or "mute".
|
||
|
|
var("/usr/local/bin/volumekey") volume_script;
|
||
|
|
|
||
|
|
# Suspend command.
|
||
|
|
list("/usr/sbin/pm-suspend") suspend_cmd;
|
||
|
|
|
||
|
|
provide("GLOBAL");
|
||
|
|
}
|
||
|
|
|
||
|
|
process events_watcher {
|
||
|
|
depend("GLOBAL");
|
||
|
|
|
||
|
|
# Create process manager.
|
||
|
|
process_manager() manager;
|
||
|
|
|
||
|
|
# Wait for input device events.
|
||
|
|
sys.watch_input("event") watcher;
|
||
|
|
|
||
|
|
# Dispatch.
|
||
|
|
concat("events_watcher_", watcher.event_type) func;
|
||
|
|
call(func, {});
|
||
|
|
|
||
|
|
# Next event.
|
||
|
|
watcher->nextevent();
|
||
|
|
}
|
||
|
|
|
||
|
|
template events_watcher_added {
|
||
|
|
# Start event handling process for this device.
|
||
|
|
_caller.manager->start(_caller.watcher.devname, "events_input_device", {_caller.watcher.devname});
|
||
|
|
}
|
||
|
|
|
||
|
|
template events_watcher_removed {
|
||
|
|
# Stop event handling process for this device.
|
||
|
|
_caller.manager->stop(_caller.watcher.devname);
|
||
|
|
}
|
||
|
|
|
||
|
|
template events_input_device {
|
||
|
|
# Alias arguments.
|
||
|
|
var(_arg0) dev;
|
||
|
|
|
||
|
|
# Get global.
|
||
|
|
depend("GLOBAL") gdep;
|
||
|
|
|
||
|
|
# Wait for input events.
|
||
|
|
sys.evdev(dev) evdev;
|
||
|
|
|
||
|
|
# Query event details.
|
||
|
|
strcmp(evdev.code, "KEY_MUTE") is_mute;
|
||
|
|
strcmp(evdev.code, "KEY_VOLUMEUP") is_vup;
|
||
|
|
strcmp(evdev.code, "KEY_VOLUMEDOWN") is_vdown;
|
||
|
|
strcmp(evdev.code, "KEY_POWER") is_power;
|
||
|
|
strcmp(evdev.value, "1") is_pressed;
|
||
|
|
|
||
|
|
# Compute where to dispatch the event.
|
||
|
|
and(is_mute, is_pressed) dispatch_mute;
|
||
|
|
and(is_vup, is_pressed) dispatch_vup;
|
||
|
|
and(is_vdown, is_pressed) dispatch_vdown;
|
||
|
|
and(is_power, is_pressed) dispatch_power;
|
||
|
|
|
||
|
|
# Dispatch event.
|
||
|
|
choose({
|
||
|
|
{dispatch_mute, "events_input_event_mute"},
|
||
|
|
{dispatch_vup, "events_input_event_vup"},
|
||
|
|
{dispatch_vdown, "events_input_event_vdown"},
|
||
|
|
{dispatch_power, "events_input_event_power"}},
|
||
|
|
"<none>"
|
||
|
|
) func;
|
||
|
|
call(func, {});
|
||
|
|
|
||
|
|
# Next event.
|
||
|
|
evdev->nextevent();
|
||
|
|
}
|
||
|
|
|
||
|
|
template events_input_event_mute {
|
||
|
|
runonce({_caller.gdep.volume_script, "mute"});
|
||
|
|
}
|
||
|
|
|
||
|
|
template events_input_event_vup {
|
||
|
|
runonce({_caller.gdep.volume_script, "up"});
|
||
|
|
}
|
||
|
|
|
||
|
|
template events_input_event_vdown {
|
||
|
|
runonce({_caller.gdep.volume_script, "down"});
|
||
|
|
}
|
||
|
|
|
||
|
|
template events_input_event_power {
|
||
|
|
runonce(_caller.gdep.suspend_cmd);
|
||
|
|
}
|