altosui: Hide non-applicable altimeter config values

This makes configuring EasyMini a lot easier...

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

1 files changed, 6 insertions, 0 deletions

diff --git a/altosui/AltosFreqList.java b/altosui/AltosFreqList.java
index 917ac364..17a995d4 100644
--- a/altosui/AltosFreqList.java
+++ b/altosui/AltosFreqList.java
@@ -29,6 +29,12 @@ public class AltosFreqList extends JComboBox {
 
 	public void set_frequency(double new_frequency) {
 		int i;
+
+		if (new_frequency < 0) {
+			setVisible(false);
+			return;
+		}
+
 		for (i = 0; i < getItemCount(); i++) {
 			AltosFrequency	f = (AltosFrequency) getItemAt(i);