altosui/telegps: Display error message when attempting to graph unknown files

Instead of presenting an empty graph window.

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

1 files changed, 8 insertions, 0 deletions

diff --git a/altoslib/AltosEepromRecordSet.java b/altoslib/AltosEepromRecordSet.java
index aec302e8..26b9e682 100644
--- a/altoslib/AltosEepromRecordSet.java
+++ b/altoslib/AltosEepromRecordSet.java
@@ -21,6 +21,7 @@ public class AltosEepromRecordSet implements AltosRecordSet {
 	AltosEeprom			eeprom;
 	TreeSet<AltosEepromRecord>	ordered;
 	AltosCalData			cal_data;
+	boolean				valid;
 
 	public AltosConfigData config_data() {
 		return eeprom.config_data();
@@ -52,6 +53,10 @@ public class AltosEepromRecordSet implements AltosRecordSet {
 		listener.finish();
 	}
 
+	public boolean valid() {
+		return valid;
+	}
+
 	public AltosEepromRecordSet(AltosEeprom eeprom) {
 		this.eeprom = eeprom;
 
@@ -95,8 +100,11 @@ public class AltosEepromRecordSet implements AltosRecordSet {
 
 		if (record == null) {
 			System.out.printf("failed to parse log format %d\n", config_data.log_format);
+			valid = false;
 			return;
 		}
+		valid = true;
+
 		int	tick = 0;
 		boolean first = true;