FilterActivity.java

package edu.gatech.oad.rocket.findmythings;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.Spinner;
import edu.gatech.oad.rocket.findmythings.list.ItemFilterConstraint;
import edu.gatech.oad.rocket.findmythings.model.Category;
import edu.gatech.oad.rocket.findmythings.util.EnumHelper;

import java.util.Calendar;
import java.util.GregorianCalendar;

/**
 * CS 2340 - FindMyStuff Android App
 * Activity that takes care of filtering items according to certain criteria
 *
 * @author TeamRocket
 * */
public class FilterActivity extends Activity implements OnItemSelectedListener {

	public static final int FILTER_REQUEST = 9231;
	public static final String FILTER_RESPONSE = "filterOutput";

	/**
	 * Stores spinner information as int
	 */
	public static ItemFilterConstraint constraint = new ItemFilterConstraint();

	/**
	 * creates new window with correct layout
	 * @param savedInstanceState Initializing bundle
	 */
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_filter);

		Spinner mStatus = (Spinner) findViewById(R.id.status_spinner);
		mStatus.setOnItemSelectedListener(this);

		Spinner mCat = (Spinner) findViewById(R.id.cat_spinner);
		mCat.setOnItemSelectedListener(this);

		Spinner mDate = (Spinner) findViewById(R.id.date_spinner);
		mDate.setOnItemSelectedListener(this);
	}

	/**
	 * creates the options menu
	 * @param menu System action bar menu
	 * @return true when done
	 */
	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.filter, menu);
		return true;
	}

	/**
	 * deals with action when an options button is selected
	 * @param item selected menu item
	 * @return boolean
	 */
	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
	    switch (item.getItemId()) {
	        case R.id.filter_ok:
				Intent output = new Intent();
				output.putExtra(FILTER_RESPONSE, constraint);
				setResult(RESULT_OK, output);
				finish();
				return true;
	        case R.id.filter_cancel:
				setResult(RESULT_CANCELED);
				finish();
			return true;
	    }
	    return super.onOptionsItemSelected(item);
	}

	/**
	 * deals with action when an item is selected
	 * @param parent The layout XML spinner causing this result
	 * @param view The view that actually represents the spinner
	 * @param pos The selected value
	 * @param id row ID of selected item
	 */
	@Override
	public void onItemSelected(AdapterView<?> parent, View view, int pos, long id) {
	switch(parent.getId()) {
		case R.id.status_spinner:
			switch (pos) {
				case 1:
					constraint.setOpen(true);
					break;
				case 2:
					constraint.setOpen(false);
					break;
				default:
					constraint.setOpen(null);
					break;
			}
			break;
		case R.id.cat_spinner: //category
			if (pos == 0) {
				constraint.setCategory(null);
			} else {
				constraint.setCategory(EnumHelper.forInt(pos-1, Category.class));
			}
			break;
		case R.id.date_spinner: //date
			if (pos == 0) {
				constraint.setDateAfter(null);
			} else {
				Calendar today = new GregorianCalendar(); //get current date
				Calendar date2 = (Calendar)today.clone(); //will be change to yesterday, 14dayago or 30daysago
				switch(pos) {
					case 1:
						date2.add(Calendar.DATE, -2);
						break;
					case 2:
						date2.add(Calendar.DATE, -15);
						break;
					case 3:
						date2.add(Calendar.DATE, -31);
						break;
				}

				constraint.setDateAfter(date2.getTime());
			}
			break;
		}
	}

	/**
	 * deals with what to do when nothing is selected
	 * @param arg0 The layout XML spinner causing this result
	 */
	@Override
	public void onNothingSelected(AdapterView<?> arg0) {}

	/**
	 * Called to pop the login window from the navigation stack
	 */
	@Override
	public void finish() {
		super.finish();
		overridePendingTransition(R.anim.hold, R.anim.slide_down_modal);
	}

}