EvenTrendActivity.java

/*
 * Copyright (C) 2007 The Android Open Source Project
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */

package net.redgeek.android.eventrend;

import java.util.ArrayList;

import net.redgeek.android.eventrend.db.EvenTrendDbAdapter;
import net.redgeek.android.eventrend.graph.plugins.CubicInterpolator;
import net.redgeek.android.eventrend.graph.plugins.LinearInterpolator;
import net.redgeek.android.eventrend.graph.plugins.StepEarlyInterpolator;
import net.redgeek.android.eventrend.graph.plugins.StepLateInterpolator;
import net.redgeek.android.eventrend.graph.plugins.StepMidInterpolator;
import net.redgeek.android.eventrend.graph.plugins.TimeSeriesInterpolator;
import net.redgeek.android.eventrend.util.DialogUtil;
import net.redgeek.android.eventrend.util.GUITask;
import net.redgeek.android.eventrend.util.GUITaskQueue;
import android.app.ListActivity;
import android.content.Context;
import android.os.Bundle;

/**
 * Base class for all activities in the application. Note that not all activity
 * need be ListActivities, but most are, and it's convenient to wrap a bunch of
 * common setup, teardown, and sundry tasks in this one. The only penalty is a
 * little extra overhead in activities that don't actually use a list, and the
 * requirement for (an invisible) ListView be present in the root xml layout
 * file for the activity.
 * 
 * <p>
 * The common elements are creating constants for Intent indices, common Bundle
 * keys, storing the Context of the activity, creating a DialogUtil instance,
 * creating and opening a DatabaseAdapter, and starting and stopping the
 * GUITaskQueue on pause and resume.
 * 
 * @author barclay
 * 
 */
public class EvenTrendActivity extends ListActivity implements GUITask {
  public static final String TAG = "EvenTrend";
  
  public static final int CATEGORY_LIST = 0;
  public static final int CATEGORY_CREATE = 1;
  public static final int CATEGORY_EDIT = 2;
  public static final int ENTRY_LIST = 3;
  public static final int ENTRY_EDIT = 4;
  public static final int GRAPH_VIEW = 5;
  public static final int CALENDAR_VIEW = 6;
  public static final int IMPORT_REPLACE = 7;
  // protected static final int IMORT_MERGE = 8;
  public static final int PREFS_EDIT = 9;
  public static final int FORMULA_EDIT = 10;

  public static final String CATEGORY_ID = "CategoryId";
  public static final String FORMULA = "Formula";
  public static final String VIEW_DEFAULT_CATIDS = "ViewIdsDefault";
  public static final String GRAPH_START_MS = "GraphStartMS";
  public static final String GRAPH_END_MS = "GraphEndMS";
  public static final String GRAPH_AGGREGATION = "GraphAggregation";
  public static final String CALENDAR_PERIOD = "CalendarPeriod";
  public static final String FORMULA_TEXT = "FormulaText";
  
  public static final int    RESULT_DELETED = 100;

  private Context mCtx;
  private EvenTrendDbAdapter mDbh;
  private DialogUtil mDialogUtil;

  // Plugings
  private ArrayList<TimeSeriesInterpolator> mInterpolators;

  @Override
  public void onCreate(Bundle icicle) {
    super.onCreate(icicle);

    mCtx = this;
    mDialogUtil = new DialogUtil(mCtx);
    mDbh = new EvenTrendDbAdapter.SqlAdapter(this);
    mDbh.open();

    mInterpolators = new ArrayList<TimeSeriesInterpolator>();
    registerPlugins();
  }

  @Override
  protected void onPause() {
    GUITaskQueue.getInstance().stop();
    super.onPause();
  }

  @Override
  protected void onResume() {
    GUITaskQueue.getInstance().start();
    super.onResume();
  }

  @Override
  protected void onDestroy() {
    mDbh.close();
    super.onResume();
  }

  public void afterExecute() {
  }

  public void executeNonGuiTask() throws Exception {
  }

  public void onFailure(Throwable t) {
  }

  public Context getCtx() {
    return mCtx;
  }

  public EvenTrendDbAdapter getDbh() {
    return mDbh;
  }

  public DialogUtil getDialogUtil() {
    return mDialogUtil;
  }

  public ArrayList<TimeSeriesInterpolator> getInterpolators() {
    return mInterpolators;
  }

  public static ArrayList<TimeSeriesInterpolator> getInterpolatorsCopy() {
    ArrayList<TimeSeriesInterpolator> list = new ArrayList<TimeSeriesInterpolator>();
    registerInterpolators(list);
    return list;
  }

  public TimeSeriesInterpolator getInterpolator(String name) {
    TimeSeriesInterpolator tsi = null;

    if (name == null)
      return null;

    for (int i = 0; i < mInterpolators.size(); i++) {
      tsi = mInterpolators.get(i);
      if (name.equals(tsi.getName()))
        return tsi;
    }

    return null;
  }
  
  private void registerPlugins() {
    registerInterpolators(mInterpolators);
  }

  private static void registerInterpolators(ArrayList<TimeSeriesInterpolator> list) {
    registerInterpolator(list, new LinearInterpolator());
    registerInterpolator(list, new CubicInterpolator());
    registerInterpolator(list, new StepEarlyInterpolator());
    registerInterpolator(list, new StepMidInterpolator());
    registerInterpolator(list, new StepLateInterpolator());
  }

  private static void registerInterpolator(ArrayList<TimeSeriesInterpolator> list,
      TimeSeriesInterpolator tsi) {
    list.add(tsi);
  }
}