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Only run target-tracker-timer when feature is enabled.

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This commit is contained in:
ThorstenB 2011-03-27 21:02:26 +02:00
parent afaaf62e18
commit c26de5ce41
1 changed files with 21 additions and 12 deletions
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33
Nasal/track_target.nas
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@ -75,6 +75,9 @@ var min_speed_kt = 0;
# Target property tree root
var target_root = "";
# Loop identifier
var tracker_loop_id = 0;
# Initialize target tracking
var TrackInit = func {
if (props.globals.getNode("autopilot") == nil)
@ -109,20 +112,25 @@ var TrackInit = func {
target_root = default_target_root;
setprop("/autopilot/target-tracking/target-root", target_root);
}
}
settimer(TrackInit, 0);
setlistener("/autopilot/target-tracking/enable", func { startTimer();} );
}
# If enabled, update our AP target values based on the target range,
# bearing, and speed
var TrackUpdate = func {
var TrackUpdate = func(loop_id) {
# avoid running multiple concurrent timers
if (tracker_loop_id != loop_id)
return;
if (props.globals.getNode("autopilot") == nil)
return;
target_tracking_enable = getprop("/autopilot/target-tracking/enable");
update_period = getprop("/autopilot/target-tracking/update-period");
if ( target_tracking_enable == 1 ) {
update_period = getprop("/autopilot/target-tracking/update-period");
# refresh user configurable values
goal_range_nm = getprop("/autopilot/target-tracking/goal-range-nm");
target_root = getprop("/autopilot/target-tracking/target-root");
@ -182,16 +190,17 @@ var TrackUpdate = func {
setprop( "/autopilot/settings/true-heading-deg",
my_hdg_true + h_offset );
setprop( "/autopilot/settings/target-speed-kt", target_speed );
# only keep the timer running when the feature is really enabled
settimer(func() { TrackUpdate(loop_id); }, update_period );
}
# last thing to do before we return from this function
registerTimer();
}
# create and start a new timer to cause our update function to be called periodially
startTimer = func {
tracker_loop_id += 1;
TrackUpdate(tracker_loop_id);
}
# timer handling to cause our update function to be called periodially
registerTimer = func {
settimer(TrackUpdate, update_period );
}
registerTimer();
settimer(TrackInit, 0);