altosui: Make scan UI handle incremental telem data

The new telem format doesn't send everything in each telem packet, so
we need to handle updating information incrementally in the scan
results. This involved clearing old scan data when switching
frequencies and then updating existing entries with new data as it arrives.

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

1 files changed, 32 insertions, 10 deletions

diff --git a/altosui/AltosScanUI.java b/altosui/AltosScanUI.java
index 44eeda6d..ef6389b6 100644
--- a/altosui/AltosScanUI.java
+++ b/altosui/AltosScanUI.java
@@ -59,29 +59,50 @@ class AltosScanResult {
 	}
 
 	public boolean equals(AltosScanResult other) {
-		return (callsign.equals(other.callsign) &&
-			serial == other.serial &&
-			flight == other.flight &&
+		return (serial == other.serial &&
 			frequency.frequency == other.frequency.frequency &&
 			telemetry == other.telemetry);
 	}
+
+	public boolean up_to_date(AltosScanResult other) {
+		if (flight == 0 && other.flight != 0) {
+			flight = other.flight;
+			return false;
+		}
+		if (callsign.equals("N0CALL") && !other.callsign.equals("N0CALL")) {
+			callsign = other.callsign;
+			return false;
+		}
+		return true;
+	}
 }
 
 class AltosScanResults extends LinkedList<AltosScanResult> implements ListModel {
 	
 	LinkedList<ListDataListener>	listeners = new LinkedList<ListDataListener>();
 
+	void changed(ListDataEvent de) {
+		for (ListDataListener l : listeners)
+			l.contentsChanged(de);
+	}
+
 	public boolean add(AltosScanResult r) {
-		for (AltosScanResult old : this)
-			if (old.equals(r))
+		int i = 0;
+		for (AltosScanResult old : this) {
+			if (old.equals(r)) {
+				if (!old.up_to_date(r))
+					changed (new ListDataEvent(this,
+								   ListDataEvent.CONTENTS_CHANGED,
+								   i, i));
 				return true;
+			}
+			i++;
+		}
 
 		super.add(r);
-		ListDataEvent	de = new ListDataEvent(this,
-						       ListDataEvent.INTERVAL_ADDED,
-						       this.size() - 2, this.size() - 1);
-		for (ListDataListener l : listeners)
-			l.contentsChanged(de);
+		changed(new ListDataEvent(this,
+					  ListDataEvent.INTERVAL_ADDED,
+					  this.size() - 2, this.size() - 1));
 		return true;
 	}
 
@@ -205,6 +226,7 @@ public class AltosScanUI
 	
 	void set_frequency() throws InterruptedException, TimeoutException {
 		reader.set_frequency(frequencies[frequency_index].frequency);
+		reader.reset();
 	}
 	
 	void next() throws InterruptedException, TimeoutException {