altosdroid: Skip updating hidden UI elements

Instead of updating everything in the UI, only update the visible UI
elements to save a bunch of computation.

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

1 files changed, 5 insertions, 4 deletions

diff --git a/altosdroid/src/org/altusmetrum/AltosDroid/TabLanded.java b/altosdroid/src/org/altusmetrum/AltosDroid/TabLanded.java
index 47e41d59..16427d8b 100644
--- a/altosdroid/src/org/altusmetrum/AltosDroid/TabLanded.java
+++ b/altosdroid/src/org/altusmetrum/AltosDroid/TabLanded.java
@@ -28,7 +28,7 @@ import android.view.ViewGroup;
 import android.widget.TextView;
 import android.location.Location;
 
-public class TabLanded extends Fragment implements AltosDroidTab {
+public class TabLanded extends AltosDroidTab {
 	AltosDroid mAltosDroid;
 
 	private TextView mBearingView;
@@ -73,7 +73,9 @@ public class TabLanded extends Fragment implements AltosDroidTab {
 		mAltosDroid = null;
 	}
 
-	public void update_ui(AltosState state, AltosGreatCircle from_receiver, Location receiver) {
+	public String tab_name() { return "landed"; }
+
+	public void show(AltosState state, AltosGreatCircle from_receiver, Location receiver) {
 		if (from_receiver != null) {
 			mBearingView.setText(String.format("%3.0f°", from_receiver.bearing));
 			mDistanceView.setText(String.format("%6.0f m", from_receiver.distance));
@@ -87,12 +89,11 @@ public class TabLanded extends Fragment implements AltosDroidTab {
 			mReceiverLatitudeView.setText(AltosDroid.pos(receiver.getLatitude(), "N", "S"));
 			mReceiverLongitudeView.setText(AltosDroid.pos(receiver.getLongitude(), "W", "E"));
 		}
-	       
+
 		if (state != null) {
 			mMaxHeightView.setText(String.format("%6.0f m", state.max_height()));
 			mMaxAccelView.setText(String.format("%6.0f m/s²", state.max_acceleration()));
 			mMaxSpeedView.setText(String.format("%6.0f m/s", state.max_speed()));
 		}
 	}
-
 }