X-Git-Url: https://git.gag.com/?p=fw%2Faltos;a=blobdiff_plain;f=altoslib%2FAltosPreferences.java;h=e50b9b5cf05a9a856b1b60fb3af6fe604ac3db39;hp=47196d6e70b89342ef3f876207bef574bcb941f4;hb=6db192898eebf750c4d51516eff7916bc4da493b;hpb=03496dc47372c40f7faae1766b0e729a1feeab7c

diff --git a/altoslib/AltosPreferences.java b/altoslib/AltosPreferences.java
index 47196d6e..e50b9b5c 100644
--- a/altoslib/AltosPreferences.java
+++ b/altoslib/AltosPreferences.java
@@ -367,6 +367,8 @@ public class AltosPreferences {
 		set_common_frequencies(new_frequencies);
 	}
 
+	static LinkedList<AltosUnitsListener> units_listeners;
+
 	public static boolean imperial_units() {
 		synchronized(backend) {
 			return AltosConvert.imperial_units;
@@ -379,5 +381,24 @@ public class AltosPreferences {
 			backend.putBoolean(unitsPreference, imperial_units);
 			flush_preferences();
 		}
+		if (units_listeners != null) {
+			for (AltosUnitsListener l : units_listeners) {
+				l.units_changed(imperial_units);
+			}
+		}
+	}
+
+	public static void register_units_listener(AltosUnitsListener l) {
+		synchronized(backend) {
+			if (units_listeners == null)
+				units_listeners = new LinkedList<AltosUnitsListener>();
+			units_listeners.add(l);
+		}
+	}
+
+	public static void unregister_units_listener(AltosUnitsListener l) {
+		synchronized(backend) {
+			units_listeners.remove(l);
+		}
 	}
 }