altosui: Fix the 'Graph' button on the landed tab

It hasn't been getting enabled since the state tabs were rewritten.

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

1 files changed, 6 insertions, 0 deletions

diff --git a/altosui/AltosLanded.java b/altosui/AltosLanded.java
index 50c1ea31..7c50adac 100644
--- a/altosui/AltosLanded.java
+++ b/altosui/AltosLanded.java
@@ -151,6 +151,12 @@ public class AltosLanded extends AltosUIFlightTab implements ActionListener {
 		return "Landed";
 	}
 
+	public void show(AltosState state, AltosListenerState listener_state) {
+		super.show(state, listener_state);
+		if (reader.backing_file() != null)
+			graph.setEnabled(true);
+	}
+
 	public AltosLanded(AltosFlightReader in_reader) {
 		reader = in_reader;