altoslib/altosui: Carry receiver status around in AltosListenerState

This moves the crc_errors into the new structure and adds a receiver
battery voltage value there as well. Now the receiver status can be
monitored separately from the flight status. That also means that code
receiving state updates should be prepared to accept missing listener
or flight state values.

Signed-off-by: Keith Packard <keithp@keithp.com>

1 files changed, 15 insertions, 9 deletions

diff --git a/altoslib/AltosRecord.java b/altoslib/AltosRecord.java
index f8c44cc5..7046b9f1 100644
--- a/altoslib/AltosRecord.java
+++ b/altoslib/AltosRecord.java
@@ -17,7 +17,7 @@
 
 package org.altusmetrum.altoslib_1;
 
-public abstract class AltosRecord implements Comparable <AltosRecord>, Cloneable {
+public class AltosRecord implements Comparable <AltosRecord>, Cloneable {
 
 	public static final int	seen_flight = 1;
 	public static final int	seen_sensor = 2;
@@ -75,15 +75,17 @@ public abstract class AltosRecord implements Comparable <AltosRecord>, Cloneable
 	 *	temperature:	°C
 	 */
 
-	abstract public double pressure();
-	abstract public double ground_pressure();
-	abstract public double acceleration();
+	public double pressure() { return MISSING; }
+	public double ground_pressure() { return MISSING; }
+	public double acceleration() { return MISSING; }
 
 	public double altitude() {
 		double	p = pressure();
 
-		if (p == MISSING)
+		if (p == MISSING) {
+			System.out.printf ("altitude missing\n");
 			return MISSING;
+		}
 		return AltosConvert.pressure_to_altitude(p);
 	}
 
@@ -126,7 +128,11 @@ public abstract class AltosRecord implements Comparable <AltosRecord>, Cloneable
 		return tick - o.tick;
 	}
 
-	abstract public AltosRecord clone();
+	public AltosRecord clone() {
+		AltosRecord n = new AltosRecord();
+		n.copy(this);
+		return n;
+	}
 
 	public void copy(AltosRecord old) {
 		seen = old.seen;
@@ -150,13 +156,13 @@ public abstract class AltosRecord implements Comparable <AltosRecord>, Cloneable
 		seen = 0;
 		version = 0;
 		callsign = "N0CALL";
-		serial = 0;
-		flight = 0;
+		serial = MISSING;
+		flight = MISSING;
 		rssi = 0;
 		status = 0;
 		state = AltosLib.ao_flight_startup;
 		tick = 0;
-		gps = new AltosGPS();
+		gps = null;
 		new_gps = false;
 		companion = null;