android/src/net/sf/openrocket/android/rocket/OpenRocketViewer.java

@@ -37,6 +37,8 @@ implements Simulations.OnSimulationSelectedListener
 	private final static int TABSIZE = 4;
 
 	private OpenRocketViewerPagerAdapter viewPagerAdapter;
+	
+	private MenuItem saveAction;
 
 	@Override
 	protected void onCreate(Bundle savedInstanceState) {
@@ -78,6 +80,7 @@ implements Simulations.OnSimulationSelectedListener
 	public boolean onCreateOptionsMenu(Menu menu) {
 		MenuInflater inflater = getSupportMenuInflater();
 		inflater.inflate(R.menu.rocket_viewer_option_menu, menu);
+		saveAction = menu.findItem(R.id.menu_save);
 		return true;
 	}
 
@@ -93,6 +96,8 @@ implements Simulations.OnSimulationSelectedListener
 			// FIXME - Probably want to open a dialog here.
 			try {
 				CurrentRocketHolder.getCurrentRocket().saveOpenRocketDocument();
+				saveAction.setVisible(false);
+				invalidateOptionsMenu();
 			} catch ( IOException iex ) {
 				AndroidLogWrapper.d(OpenRocketViewer.class, iex.getMessage());
 			}
@@ -149,10 +154,13 @@ implements Simulations.OnSimulationSelectedListener
 	}
 
 	private class RocketChangedEventHandler extends net.sf.openrocket.android.RocketChangedEventHandler {
-
 		
 		@Override
 		protected void doSimsChanged() {
+			if (saveAction != null ) {
+				saveAction.setVisible(true);
+				invalidateOptionsMenu();
+			}
 			Simulations sims = (Simulations) viewPagerAdapter.getFragmentAtPos(SIMS_POS);
 			if ( sims != null ) {
 				sims.refreshSimulationList();
@@ -161,6 +169,10 @@ implements Simulations.OnSimulationSelectedListener
 
 		@Override
 		protected void doMotorConfigsChanged() {
+			if (saveAction != null ) {
+				saveAction.setVisible(true);
+				invalidateOptionsMenu();
+			}
 			Configurations configs = (Configurations) viewPagerAdapter.getFragmentAtPos(CONFIGS_POS);
 			if ( configs != null ) {
 				configs.refreshConfigsList();