SpinnerDataFactory.java :  » Log » shadowlands-roadtrip » org » shadowlands » roadtrip » android » Android Open Source

/*
 *  This file is part of Shadowlands RoadTrip - A vehicle logbook for Android.
 *
 *  Copyright (C) 2010 Jeremy D Monin <jdmonin@nand.net>
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package org.shadowlands.roadtrip.android;

import org.shadowlands.roadtrip.db.Person;
import org.shadowlands.roadtrip.db.RDBAdapter;
import org.shadowlands.roadtrip.db.Vehicle;

import android.content.Context;
import android.database.sqlite.SQLiteException;
import android.widget.ArrayAdapter;
import android.widget.Spinner;

/**
 * Fill the data in spinners of data-backed object types,
 * such as {@link Vehicle} or {@link Person} (driver).
 *
 * @author jdmonin
 */
public class SpinnerDataFactory
{
  public static Person NEW_DRIVER;  // TODO keep?
  public static Person NEW_VEHICLE; // TODO keep?

  /**
   * Populate a spinner from the drivers (Persons) in the database.
   * @param db  connection to use
   * @param ctx  the calling Activity or Context
   * @param sp  spinner to fill with the drivers
   * @param currentID  If not -1, the driver _id to select in the Spinner. 
   * @return true on success, false if could not populate from database
   */
  public static boolean setupDriversSpinner(RDBAdapter db, Context ctx, Spinner sp, final int currentID)
  {
    Person[] drivers = populateDriversList(db);
      if (drivers == null)
        return false;

      ArrayAdapter<Person> daa = new ArrayAdapter<Person>(ctx, android.R.layout.simple_spinner_item, drivers);
      daa.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
      sp.setAdapter(daa);

      if (currentID != -1)
      {
        for (int i = drivers.length - 1; i >= 0; --i)
          if (currentID == drivers[i].getID())
          {
            sp.setSelection(i);
            break;
          }
      }

      return true;
  }

  /**
   * Populate a spinner from the Vehicles in the database.
   * @param db  connection to use
   * @param ctx  the calling Activity or Context
   * @param sp  spinner to fill with the vehicles
   * @param currentID  If not -1, the driver _id to select in the Spinner. 
   * @return true on success, false if could not populate from database
   */
  public static boolean setupVehiclesSpinner(RDBAdapter db, Context ctx, Spinner sp, final int currentID)
  {
    Vehicle[] veh = populateVehiclesList(db);
      if (veh == null)
        return false;

      ArrayAdapter<Vehicle> daa = new ArrayAdapter<Vehicle>(ctx, android.R.layout.simple_spinner_item, veh);
      daa.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
      sp.setAdapter(daa);

      if (currentID != -1)
      {
        for (int i = veh.length - 1; i >= 0; --i)
          if (currentID == veh[i].getID())
          {
            sp.setSelection(i);
            break;
          }
      }

      return true;
  }

  /**
   * For {@link #setupDriversSpinner(RDBAdapter, Context, Spinner)},
   * gather the list of drivers (Persons) from the database.
   *
   * @param db  connection to use
   * @return array of drivers (Persons), or null
   */
  private static Person[] populateDriversList(RDBAdapter db)
  {
    Person[] drivers = null; 

      try
      {
        drivers = Person.getAll(db, true);
      }
      catch (SQLiteException e)
      {}

      return drivers;
  }

  /**
   * For {@link #setupVehiclesSpinner(RDBAdapter, Context, Spinner)},
   * gather the list of vehicles from the database.
   *
   * @param db  connection to use
   * @return array of vehicles, or null
   */
  private static Vehicle[] populateVehiclesList(RDBAdapter db)
  {
    Vehicle[] veh = null; 

      try
      {
        veh = Vehicle.getAll(db);
      }
      catch (SQLiteException e)
      {}

      return veh;
  }

}