1 files changed, 61 insertions, 3 deletions
diff --git a/altosdroid/src/org/altusmetrum/AltosDroid/AltosDroidTab.java b/altosdroid/src/org/altusmetrum/AltosDroid/AltosDroidTab.java
index fac4b8d4..8e625da6 100644
--- a/altosdroid/src/org/altusmetrum/AltosDroid/AltosDroidTab.java
+++ b/altosdroid/src/org/altusmetrum/AltosDroid/AltosDroidTab.java
@@ -17,9 +17,67 @@
 
 package org.altusmetrum.AltosDroid;
 
-import org.altusmetrum.altoslib_4.*;
+import org.altusmetrum.altoslib_5.*;
 import android.location.Location;
+import android.app.Activity;
+import android.graphics.Color;
+import android.os.Bundle;
+import android.support.v4.app.Fragment;
+import android.support.v4.app.FragmentTransaction;
+import android.support.v4.app.FragmentManager;
+import android.location.Location;
+import android.util.Log;
+import android.widget.TextView;
+
+public abstract class AltosDroidTab extends Fragment implements AltosUnitsListener {
+	AltosState		last_state;
+	AltosGreatCircle	last_from_receiver;
+	Location		last_receiver;
+
+	public abstract void show(AltosState state, AltosGreatCircle from_receiver, Location receiver);
+
+	public abstract String tab_name();
+
+	public void units_changed(boolean imperial_units) {
+		if (!isHidden() && last_state != null)
+			show(last_state, last_from_receiver, last_receiver);
+	}
+
+	public void set_value(TextView text_view,
+			      AltosUnits units,
+			      int width,
+			      double value) {
+		if (value == AltosLib.MISSING)
+			text_view.setText("");
+		else
+			text_view.setText(units.show(width, value));
+	}
+
+	public void set_visible(boolean visible) {
+		FragmentTransaction	ft = AltosDroid.fm.beginTransaction();
+		if (visible) {
+			AltosState		state = last_state;
+			AltosGreatCircle	from_receiver = last_from_receiver;
+			Location		receiver = last_receiver;
+
+			show(state, from_receiver, receiver);
+			ft.show(this);
+		} else
+			ft.hide(this);
+		ft.commit();
+	}
+
+	public void update_ui(AltosState state, AltosGreatCircle from_receiver, Location receiver, boolean is_current) {
+		last_state = state;
+		last_from_receiver = from_receiver;
+		last_receiver = receiver;
+		if (is_current) {
+			if (AltosDroid.D) Log.d(AltosDroid.TAG, String.format("%s: visible, performing update", tab_name()));
 
-public interface AltosDroidTab {
-	public void update_ui(AltosState state, AltosGreatCircle from_receiver, Location receiver);
+			show(state, from_receiver, receiver);
+		} else {
+			if (AltosDroid.D) Log.d(AltosDroid.TAG, String.format("%s: not visible, skipping update", tab_name()));
+			return;
+		}
+	}
 }