Overview.java

package net.sf.openrocket.android.rocket;

import net.sf.openrocket.R;
import net.sf.openrocket.aerodynamics.AerodynamicCalculator;
import net.sf.openrocket.aerodynamics.BarrowmanCalculator;
import net.sf.openrocket.aerodynamics.FlightConditions;
import net.sf.openrocket.aerodynamics.WarningSet;
import net.sf.openrocket.android.CurrentRocketHolder;
import net.sf.openrocket.android.util.AndroidLogWrapper;
import net.sf.openrocket.document.OpenRocketDocument;
import net.sf.openrocket.masscalc.BasicMassCalculator;
import net.sf.openrocket.masscalc.MassCalculator;
import net.sf.openrocket.masscalc.MassCalculator.MassCalcType;
import net.sf.openrocket.rocketcomponent.Configuration;
import net.sf.openrocket.rocketcomponent.Rocket;
import net.sf.openrocket.rocketcomponent.RocketUtils;
import net.sf.openrocket.unit.Unit;
import net.sf.openrocket.unit.UnitGroup;
import net.sf.openrocket.util.Coordinate;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.TextView;

public class Overview extends Fragment
implements SharedPreferences.OnSharedPreferenceChangeListener
{

	/* Calculation of CP and CG */
	private AerodynamicCalculator aerodynamicCalculator = new BarrowmanCalculator();
	private MassCalculator massCalculator  = new BasicMassCalculator();

	private MotorConfigSpinner configurationSpinner;


	@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container,
			Bundle savedInstanceState) {
		AndroidLogWrapper.d(Overview.class, "Created View");
		View v = inflater.inflate(R.layout.rocket_overview, container, false);
		configurationSpinner = (MotorConfigSpinner) v.findViewById(R.id.openrocketviewerConfigurationSpinner);

		return v;
	}

	@Override
	public void onActivityCreated(Bundle savedInstanceState) {
		super.onActivityCreated(savedInstanceState);

		SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(getActivity());
		prefs.registerOnSharedPreferenceChangeListener(this);

	}

	@Override
	public void onResume() {
		super.onResume();
		setup();

	}

	@Override
	public void onDestroy() {
		super.onDestroy();

		SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(getActivity());
		prefs.unregisterOnSharedPreferenceChangeListener(this);
	}

	@Override
	public void onSharedPreferenceChanged(SharedPreferences arg0, String arg1) {
		if ( this.isVisible() ) {
			setup();
		}
	}

	private void setup() {
		final OpenRocketDocument rocketDocument = CurrentRocketHolder.getCurrentRocket().getRocketDocument();
		Rocket rocket = rocketDocument.getRocket();

		// Find the index of the default configuration so we can preselect it.
		Configuration defaultConfiguration = rocketDocument.getDefaultConfiguration();
		configurationSpinner.createAdapter(rocket);
		AndroidLogWrapper.d(Overview.class, "configurationSpinner = " + configurationSpinner);

		if ( defaultConfiguration != null ) {
			configurationSpinner.setSelectedConfiguration(defaultConfiguration.getMotorConfigurationID());
		}
		configurationSpinner.setOnItemSelectedListener( new AdapterView.OnItemSelectedListener() {

			/* (non-Javadoc)
			 * @see android.widget.AdapterView.OnItemSelectedListener#onItemSelected(android.widget.AdapterView, android.view.View, int, long)
			 */
			@Override
			public void onItemSelected(AdapterView<?> arg0, View arg1,
					int arg2, long arg3) {

				String selectedConfigId = rocketDocument.getRocket().getMotorConfigurationIDs()[arg2];
				Configuration config = new Configuration(rocketDocument.getRocket());
				config.setMotorConfigurationID(selectedConfigId);
				Coordinate cp = aerodynamicCalculator.getWorstCP(config,
						new FlightConditions(config),
						new WarningSet());

				Coordinate cg = massCalculator.getCG(config, MassCalcType.LAUNCH_MASS);

				Unit lengthUnit = UnitGroup.UNITS_LENGTH.getDefaultUnit();
				Unit massUnit = UnitGroup.UNITS_MASS.getDefaultUnit();
				Unit stabilityUnit = UnitGroup.stabilityUnits(config).getDefaultUnit();

				((TextView)getActivity().findViewById(R.id.openrocketviewerCP)).setText(lengthUnit.toStringUnit(cp.x));
				((TextView)getActivity().findViewById(R.id.openrocketviewerCG)).setText(lengthUnit.toStringUnit(cg.x));
				((TextView)getActivity().findViewById(R.id.openrocketviewerLiftOffWeight)).setText(massUnit.toStringUnit(cg.weight));
				((TextView)getActivity().findViewById(R.id.openrocketviewerStabilityMargin)).setText(stabilityUnit.toStringUnit(cp.x-cg.x));

			}

			/* (non-Javadoc)
			 * @see android.widget.AdapterView.OnItemSelectedListener#onNothingSelected(android.widget.AdapterView)
			 */
			@Override
			public void onNothingSelected(AdapterView<?> arg0) {
				((TextView)getActivity().findViewById(R.id.openrocketviewerCP)).setText("");
				((TextView)getActivity().findViewById(R.id.openrocketviewerCG)).setText("");
				((TextView)getActivity().findViewById(R.id.openrocketviewerLiftOffWeight)).setText("");
				((TextView)getActivity().findViewById(R.id.openrocketviewerStabilityMargin)).setText("");
			}

		});

		Unit lengthUnit = UnitGroup.UNITS_LENGTH.getDefaultUnit();
		Unit massUnit = UnitGroup.UNITS_MASS.getDefaultUnit();

		Coordinate cg = RocketUtils.getCG(rocket, MassCalcType.NO_MOTORS);
		double length = RocketUtils.getLength(rocket);
		((TextView)getActivity().findViewById(R.id.openrocketviewerDesigner)).setText(rocket.getDesigner());
		((TextView)getActivity().findViewById(R.id.openrocketviewerLength)).setText(lengthUnit.toStringUnit(length));
		((TextView)getActivity().findViewById(R.id.openrocketviewerMass)).setText(massUnit.toStringUnit(cg.weight));
		((TextView)getActivity().findViewById(R.id.openrocketviewerStageCount)).setText(String.valueOf(rocket.getStageCount()));
	}

}