src/com/android/deskclock/DeskClock.java - platform/packages/apps/DeskClock - Git at Google

 /*
  * Copyright (C) 2009 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 com.android.deskclock;

 import android.app.ActionBar;
 import android.app.ActionBar.Tab;
 import android.app.Activity;
 import android.app.Fragment;
 import android.app.FragmentManager;
 import android.app.FragmentTransaction;
 import android.content.ActivityNotFoundException;
 import android.content.Context;
 import android.content.Intent;
 import android.content.SharedPreferences;
 import android.os.Bundle;
 import android.preference.PreferenceManager;
 import android.support.v13.app.FragmentPagerAdapter;
 import android.support.v4.view.ViewPager;
 import android.util.Log;
 import android.view.Menu;
 import android.view.MenuItem;
 import android.view.MotionEvent;
 import android.view.View;
 import android.view.View.OnTouchListener;
 import android.widget.PopupMenu;
 import android.widget.TextView;

 import com.android.deskclock.stopwatch.StopwatchFragment;
 import com.android.deskclock.stopwatch.StopwatchService;
 import com.android.deskclock.stopwatch.Stopwatches;
 import com.android.deskclock.timer.TimerFragment;
 import com.android.deskclock.timer.TimerObj;
 import com.android.deskclock.timer.Timers;
 import com.android.deskclock.worldclock.CitiesActivity;

 import java.util.ArrayList;
 import java.util.HashSet;
 import java.util.TimeZone;

 /**
  * DeskClock clock view for desk docks.
  */
 public class DeskClock extends Activity implements LabelDialogFragment.TimerLabelDialogHandler {
     private static final boolean DEBUG = false;

     private static final String LOG_TAG = "DeskClock";

     // Alarm action for midnight (so we can update the date display).
     private static final String KEY_SELECTED_TAB = "selected_tab";
     private static final String KEY_CLOCK_STATE = "clock_state";

     public static final String SELECT_TAB_INTENT_EXTRA = "deskclock.select.tab";

     private ActionBar mActionBar;
     private Tab mTimerTab;
     private Tab mClockTab;
     private Tab mStopwatchTab;

     private ViewPager mViewPager;
     private TabsAdapter mTabsAdapter;

     public static final int TIMER_TAB_INDEX = 0;
     public static final int CLOCK_TAB_INDEX = 1;
     public static final int STOPWATCH_TAB_INDEX = 2;

     private int mSelectedTab;

     @Override
     public void onNewIntent(Intent newIntent) {
         super.onNewIntent(newIntent);
         if (DEBUG) Log.d(LOG_TAG, "onNewIntent with intent: " + newIntent);

         // update our intent so that we can consult it to determine whether or
         // not the most recent launch was via a dock event
         setIntent(newIntent);

         // Timer receiver may ask to go to the timers fragment if a timer expired.
         int tab = newIntent.getIntExtra(SELECT_TAB_INTENT_EXTRA, -1);
         if (tab != -1) {
             if (mActionBar != null) {
                 mActionBar.setSelectedNavigationItem(tab);
             }
         }
     }

     private void initViews() {

         if (mTabsAdapter == null) {
             mViewPager = new ViewPager(this);
             mViewPager.setId(R.id.desk_clock_pager);
             mTabsAdapter = new TabsAdapter(this, mViewPager);
             createTabs(mSelectedTab);
         }
         setContentView(mViewPager);
         mActionBar.setSelectedNavigationItem(mSelectedTab);
     }

     private void createTabs(int selectedIndex) {
         mActionBar = getActionBar();

         mActionBar.setDisplayOptions(0);
         if (mActionBar != null) {
             mActionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
             mTimerTab = mActionBar.newTab();
             mTimerTab.setIcon(R.drawable.timer_tab);
             mTimerTab.setContentDescription(R.string.menu_timer);
             mTabsAdapter.addTab(mTimerTab, TimerFragment.class,TIMER_TAB_INDEX);

             mClockTab = mActionBar.newTab();
             mClockTab.setIcon(R.drawable.clock_tab);
             mClockTab.setContentDescription(R.string.menu_clock);
             mTabsAdapter.addTab(mClockTab, ClockFragment.class,CLOCK_TAB_INDEX);
             mStopwatchTab = mActionBar.newTab();
             mStopwatchTab.setIcon(R.drawable.stopwatch_tab);
             mStopwatchTab.setContentDescription(R.string.menu_stopwatch);
             mTabsAdapter.addTab(mStopwatchTab, StopwatchFragment.class,STOPWATCH_TAB_INDEX);
             mActionBar.setSelectedNavigationItem(selectedIndex);
             mTabsAdapter.notifySelectedPage(selectedIndex);
         }
     }

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

         mSelectedTab = CLOCK_TAB_INDEX;
         if (icicle != null) {
             mSelectedTab = icicle.getInt(KEY_SELECTED_TAB, CLOCK_TAB_INDEX);
         }

         // Timer receiver may ask the app to go to the timer fragment if a timer expired
         Intent i = getIntent();
         if (i != null) {
             int tab = i.getIntExtra(SELECT_TAB_INTENT_EXTRA, -1);
             if (tab != -1) {
                 mSelectedTab = tab;
             }
         }
         initViews();
         setHomeTimeZone();
     }

     @Override
     protected void onResume() {
         super.onResume();

         Intent stopwatchIntent = new Intent(getApplicationContext(), StopwatchService.class);
         stopwatchIntent.setAction(Stopwatches.KILL_NOTIF);
         startService(stopwatchIntent);

         SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
         SharedPreferences.Editor editor = prefs.edit();
         editor.putBoolean(Timers.NOTIF_APP_OPEN, true);
         editor.apply();
         Intent timerIntent = new Intent();
         timerIntent.setAction(Timers.NOTIF_IN_USE_CANCEL);
         sendBroadcast(timerIntent);
     }

     @Override
     public void onPause() {

         Intent intent = new Intent(getApplicationContext(), StopwatchService.class);
         intent.setAction(Stopwatches.SHOW_NOTIF);
         startService(intent);

         SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
         SharedPreferences.Editor editor = prefs.edit();
         editor.putBoolean(Timers.NOTIF_APP_OPEN, false);
         editor.apply();
         Utils.showInUseNotifications(this);

         super.onPause();
     }

     @Override
     protected void onSaveInstanceState(Bundle outState) {
         super.onSaveInstanceState(outState);
         outState.putInt(KEY_SELECTED_TAB, mActionBar.getSelectedNavigationIndex());
     }

     public void clockButtonsOnClick(View v) {
         if (v == null)
             return;
         switch (v.getId()) {
             case R.id.alarms_button:
                 startActivity(new Intent(this, AlarmClock.class));
                 break;
             case R.id.cities_button:
                 startActivity(new Intent(this, CitiesActivity.class));
                 break;
             case R.id.menu_button:
                 showMenu(v);
                 break;
             default:
                 break;
         }
     }

     private void showMenu(View v) {
         PopupMenu popupMenu = new PopupMenu(this, v);
         popupMenu.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener () {
             @Override
             public boolean onMenuItemClick(MenuItem item) {
                 switch (item.getItemId()) {
                     case R.id.menu_item_settings:
                         startActivity(new Intent(DeskClock.this, SettingsActivity.class));
                         return true;
                     case R.id.menu_item_help:
                         Intent i = item.getIntent();
                         if (i != null) {
                             try {
                                 startActivity(i);
                             } catch (ActivityNotFoundException e) {
                                 // No activity found to match the intent - ignore
                             }
                         }
                         return true;
                     case R.id.menu_item_night_mode:
                         startActivity(new Intent(DeskClock.this, ScreensaverActivity.class));
                     default:
                         break;
                 }
                 return true;
             }
         });
         popupMenu.inflate(R.menu.desk_clock_menu);

         Menu menu = popupMenu.getMenu();
         MenuItem help = menu.findItem(R.id.menu_item_help);
         if (help != null) {
             Utils.prepareHelpMenuItem(this, help);
         }
         popupMenu.show();
     }

     /***
      * Insert the local time zone as the Home Time Zone if one is not set
      */
     private void setHomeTimeZone() {
         SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
         String homeTimeZone = prefs.getString(SettingsActivity.KEY_HOME_TZ, "");
         if (!homeTimeZone.isEmpty()) {
         return;
         }
         homeTimeZone = TimeZone.getDefault().getID();
         SharedPreferences.Editor editor = prefs.edit();
         editor.putString(SettingsActivity.KEY_HOME_TZ, homeTimeZone);
         editor.apply();
         Log.v(LOG_TAG, "Setting home time zone to " + homeTimeZone);
     }

     public void registerPageChangedListener(DeskClockFragment frag) {
         if (mTabsAdapter != null) {
             mTabsAdapter.registerPageChangedListener(frag);
         }
     }

     public void unregisterPageChangedListener(DeskClockFragment frag) {
         if (mTabsAdapter != null) {
             mTabsAdapter.unregisterPageChangedListener(frag);
         }
     }


     /***
      * Adapter for wrapping together the ActionBar's tab with the ViewPager
      */

     private class TabsAdapter extends FragmentPagerAdapter
             implements ActionBar.TabListener, ViewPager.OnPageChangeListener {

         private static final String KEY_TAB_POSITION = "tab_position";

         final class TabInfo {
             private final Class<?> clss;
             private final Bundle args;

             TabInfo(Class<?> _class, int position) {
                 clss = _class;
                 args = new Bundle();
                 args.putInt(KEY_TAB_POSITION, position);
             }

             public int getPosition() {
                 return args.getInt(KEY_TAB_POSITION, 0);
             }
         }

         private final ArrayList<TabInfo> mTabs = new ArrayList <TabInfo>();
         ActionBar mMainActionBar;
         Context mContext;
         ViewPager mPager;
         // Used for doing callbacks to fragments.
         HashSet<String> mFragmentTags = new HashSet<String>();

         public TabsAdapter(Activity activity, ViewPager pager) {
             super(activity.getFragmentManager());
             mContext = activity;
             mMainActionBar = activity.getActionBar();
             mPager = pager;
             mPager.setAdapter(this);
             mPager.setOnPageChangeListener(this);
         }

         @Override
         public Fragment getItem(int position) {
             TabInfo info = mTabs.get(position);
             DeskClockFragment f = (DeskClockFragment) Fragment.instantiate(
                     mContext, info.clss.getName(), info.args);
             return f;
         }

         @Override
         public int getCount() {
             return mTabs.size();
         }

         public void addTab(ActionBar.Tab tab, Class<?> clss, int position) {
             TabInfo info = new TabInfo(clss, position);
             tab.setTag(info);
             tab.setTabListener(this);
             mTabs.add(info);
             mMainActionBar.addTab(tab);
             notifyDataSetChanged();
         }

         @Override
         public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
             // Do nothing
         }

         @Override
         public void onPageSelected(int position) {
             mMainActionBar.setSelectedNavigationItem(position);
             notifyPageChanged(position);
         }

         @Override
         public void onPageScrollStateChanged(int state) {
             // Do nothing
         }

         @Override
         public void onTabReselected(Tab arg0, FragmentTransaction arg1) {
             // Do nothing
         }

         @Override
         public void onTabSelected(Tab tab, FragmentTransaction ft) {
             TabInfo info = (TabInfo)tab.getTag();
             mPager.setCurrentItem(info.getPosition());
         }

         @Override
         public void onTabUnselected(Tab arg0, FragmentTransaction arg1) {
             // Do nothing

         }

         public void notifySelectedPage(int page) {
             notifyPageChanged(page);
         }

         private void notifyPageChanged(int newPage) {
             for (String tag : mFragmentTags) {
                 final FragmentManager fm = getFragmentManager();
                 DeskClockFragment f = (DeskClockFragment) fm.findFragmentByTag(tag);
                 if (f != null) {
                     f.onPageChanged(newPage);
                 }
             }
         }

         public void registerPageChangedListener(DeskClockFragment frag) {
             String tag = frag.getTag();
             if (mFragmentTags.contains(tag)) {
                 Log.wtf(LOG_TAG, "Trying to add an existing fragment " + tag);
             } else {
                 mFragmentTags.add(frag.getTag());
             }
             // Since registering a listener by the fragment is done sometimes after the page
             // was already changed, make sure the fragment gets the current page
             frag.onPageChanged(mMainActionBar.getSelectedNavigationIndex());
         }

         public void unregisterPageChangedListener(DeskClockFragment frag) {
             mFragmentTags.remove(frag.getTag());
         }
     }

     public static abstract class OnTapListener implements OnTouchListener {
         private float mLastTouchX;
         private float mLastTouchY;
         private long mLastTouchTime;
         private final TextView mMakePressedTextView;
         private final int mPressedColor, mGrayColor;
         private final float MAX_MOVEMENT_ALLOWED = 20;
         private final long MAX_TIME_ALLOWED = 500;

         public OnTapListener(Activity activity, TextView makePressedView) {
             mMakePressedTextView = makePressedView;
             mPressedColor = activity.getResources().getColor(Utils.getPressedColorId());
             mGrayColor = activity.getResources().getColor(Utils.getGrayColorId());
         }

         @Override
         public boolean onTouch(View v, MotionEvent e) {
             switch (e.getAction()) {
                 case (MotionEvent.ACTION_DOWN):
                     mLastTouchTime = Utils.getTimeNow();
                     mLastTouchX = e.getX();
                     mLastTouchY = e.getY();
                     if (mMakePressedTextView != null) {
                         mMakePressedTextView.setTextColor(mPressedColor);
                     }
                     break;
                 case (MotionEvent.ACTION_UP):
                     float xDiff = Math.abs(e.getX()-mLastTouchX);
                     float yDiff = Math.abs(e.getY()-mLastTouchY);
                     long timeDiff = (Utils.getTimeNow() - mLastTouchTime);
                     if (xDiff < MAX_MOVEMENT_ALLOWED && yDiff < MAX_MOVEMENT_ALLOWED
                             && timeDiff < MAX_TIME_ALLOWED) {
                         if (mMakePressedTextView != null) {
                             v = mMakePressedTextView;
                         }
                         processClick(v);
                         resetValues();
                         return true;
                     }
                     resetValues();
                     break;
                 case (MotionEvent.ACTION_MOVE):
                     xDiff = Math.abs(e.getX()-mLastTouchX);
                     yDiff = Math.abs(e.getY()-mLastTouchY);
                     if (xDiff >= MAX_MOVEMENT_ALLOWED || yDiff >= MAX_MOVEMENT_ALLOWED) {
                         resetValues();
                     }
                     break;
                 default:
                     resetValues();
             }
             return false;
         }

         private void resetValues() {
             mLastTouchX = -1*MAX_MOVEMENT_ALLOWED + 1;
             mLastTouchY = -1*MAX_MOVEMENT_ALLOWED + 1;
             mLastTouchTime = -1*MAX_TIME_ALLOWED + 1;
             if (mMakePressedTextView != null) {
                 mMakePressedTextView.setTextColor(mGrayColor);
             }
         }

         protected abstract void processClick(View v);
     }

     /** Called by the LabelDialogFormat class after the dialog is finished. **/
     @Override
     public void onDialogLabelSet(TimerObj timer, String label, String tag) {
         Fragment frag = getFragmentManager().findFragmentByTag(tag);
         if (frag instanceof TimerFragment) {
             ((TimerFragment) frag).setLabel(timer, label);
         }
     }
 }
	/*
	* Copyright (C) 2009 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 com.android.deskclock;

	import android.app.ActionBar;
	import android.app.ActionBar.Tab;
	import android.app.Activity;
	import android.app.Fragment;
	import android.app.FragmentManager;
	import android.app.FragmentTransaction;
	import android.content.ActivityNotFoundException;
	import android.content.Context;
	import android.content.Intent;
	import android.content.SharedPreferences;
	import android.os.Bundle;
	import android.preference.PreferenceManager;
	import android.support.v13.app.FragmentPagerAdapter;
	import android.support.v4.view.ViewPager;
	import android.util.Log;
	import android.view.Menu;
	import android.view.MenuItem;
	import android.view.MotionEvent;
	import android.view.View;
	import android.view.View.OnTouchListener;
	import android.widget.PopupMenu;
	import android.widget.TextView;

	import com.android.deskclock.stopwatch.StopwatchFragment;
	import com.android.deskclock.stopwatch.StopwatchService;
	import com.android.deskclock.stopwatch.Stopwatches;
	import com.android.deskclock.timer.TimerFragment;
	import com.android.deskclock.timer.TimerObj;
	import com.android.deskclock.timer.Timers;
	import com.android.deskclock.worldclock.CitiesActivity;

	import java.util.ArrayList;
	import java.util.HashSet;
	import java.util.TimeZone;

	/**
	* DeskClock clock view for desk docks.
	*/
	public class DeskClock extends Activity implements LabelDialogFragment.TimerLabelDialogHandler {
	private static final boolean DEBUG = false;

	private static final String LOG_TAG = "DeskClock";

	// Alarm action for midnight (so we can update the date display).
	private static final String KEY_SELECTED_TAB = "selected_tab";
	private static final String KEY_CLOCK_STATE = "clock_state";

	public static final String SELECT_TAB_INTENT_EXTRA = "deskclock.select.tab";

	private ActionBar mActionBar;
	private Tab mTimerTab;
	private Tab mClockTab;
	private Tab mStopwatchTab;

	private ViewPager mViewPager;
	private TabsAdapter mTabsAdapter;

	public static final int TIMER_TAB_INDEX = 0;
	public static final int CLOCK_TAB_INDEX = 1;
	public static final int STOPWATCH_TAB_INDEX = 2;

	private int mSelectedTab;

	@Override
	public void onNewIntent(Intent newIntent) {
	super.onNewIntent(newIntent);
	if (DEBUG) Log.d(LOG_TAG, "onNewIntent with intent: " + newIntent);

	// update our intent so that we can consult it to determine whether or
	// not the most recent launch was via a dock event
	setIntent(newIntent);

	// Timer receiver may ask to go to the timers fragment if a timer expired.
	int tab = newIntent.getIntExtra(SELECT_TAB_INTENT_EXTRA, -1);
	if (tab != -1) {
	if (mActionBar != null) {
	mActionBar.setSelectedNavigationItem(tab);
	}
	}
	}

	private void initViews() {

	if (mTabsAdapter == null) {
	mViewPager = new ViewPager(this);
	mViewPager.setId(R.id.desk_clock_pager);
	mTabsAdapter = new TabsAdapter(this, mViewPager);
	createTabs(mSelectedTab);
	}
	setContentView(mViewPager);
	mActionBar.setSelectedNavigationItem(mSelectedTab);
	}

	private void createTabs(int selectedIndex) {
	mActionBar = getActionBar();

	mActionBar.setDisplayOptions(0);
	if (mActionBar != null) {
	mActionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
	mTimerTab = mActionBar.newTab();
	mTimerTab.setIcon(R.drawable.timer_tab);
	mTimerTab.setContentDescription(R.string.menu_timer);
	mTabsAdapter.addTab(mTimerTab, TimerFragment.class,TIMER_TAB_INDEX);

	mClockTab = mActionBar.newTab();
	mClockTab.setIcon(R.drawable.clock_tab);
	mClockTab.setContentDescription(R.string.menu_clock);
	mTabsAdapter.addTab(mClockTab, ClockFragment.class,CLOCK_TAB_INDEX);
	mStopwatchTab = mActionBar.newTab();
	mStopwatchTab.setIcon(R.drawable.stopwatch_tab);
	mStopwatchTab.setContentDescription(R.string.menu_stopwatch);
	mTabsAdapter.addTab(mStopwatchTab, StopwatchFragment.class,STOPWATCH_TAB_INDEX);
	mActionBar.setSelectedNavigationItem(selectedIndex);
	mTabsAdapter.notifySelectedPage(selectedIndex);
	}
	}

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

	mSelectedTab = CLOCK_TAB_INDEX;
	if (icicle != null) {
	mSelectedTab = icicle.getInt(KEY_SELECTED_TAB, CLOCK_TAB_INDEX);
	}

	// Timer receiver may ask the app to go to the timer fragment if a timer expired
	Intent i = getIntent();
	if (i != null) {
	int tab = i.getIntExtra(SELECT_TAB_INTENT_EXTRA, -1);
	if (tab != -1) {
	mSelectedTab = tab;
	}
	}
	initViews();
	setHomeTimeZone();
	}

	@Override
	protected void onResume() {
	super.onResume();

	Intent stopwatchIntent = new Intent(getApplicationContext(), StopwatchService.class);
	stopwatchIntent.setAction(Stopwatches.KILL_NOTIF);
	startService(stopwatchIntent);

	SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
	SharedPreferences.Editor editor = prefs.edit();
	editor.putBoolean(Timers.NOTIF_APP_OPEN, true);
	editor.apply();
	Intent timerIntent = new Intent();
	timerIntent.setAction(Timers.NOTIF_IN_USE_CANCEL);
	sendBroadcast(timerIntent);
	}

	@Override
	public void onPause() {

	Intent intent = new Intent(getApplicationContext(), StopwatchService.class);
	intent.setAction(Stopwatches.SHOW_NOTIF);
	startService(intent);

	SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
	SharedPreferences.Editor editor = prefs.edit();
	editor.putBoolean(Timers.NOTIF_APP_OPEN, false);
	editor.apply();
	Utils.showInUseNotifications(this);

	super.onPause();
	}

	@Override
	protected void onSaveInstanceState(Bundle outState) {
	super.onSaveInstanceState(outState);
	outState.putInt(KEY_SELECTED_TAB, mActionBar.getSelectedNavigationIndex());
	}

	public void clockButtonsOnClick(View v) {
	if (v == null)
	return;
	switch (v.getId()) {
	case R.id.alarms_button:
	startActivity(new Intent(this, AlarmClock.class));
	break;
	case R.id.cities_button:
	startActivity(new Intent(this, CitiesActivity.class));
	break;
	case R.id.menu_button:
	showMenu(v);
	break;
	default:
	break;
	}
	}

	private void showMenu(View v) {
	PopupMenu popupMenu = new PopupMenu(this, v);
	popupMenu.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener () {
	@Override
	public boolean onMenuItemClick(MenuItem item) {
	switch (item.getItemId()) {
	case R.id.menu_item_settings:
	startActivity(new Intent(DeskClock.this, SettingsActivity.class));
	return true;
	case R.id.menu_item_help:
	Intent i = item.getIntent();
	if (i != null) {
	try {
	startActivity(i);
	} catch (ActivityNotFoundException e) {
	// No activity found to match the intent - ignore
	}
	}
	return true;
	case R.id.menu_item_night_mode:
	startActivity(new Intent(DeskClock.this, ScreensaverActivity.class));
	default:
	break;
	}
	return true;
	}
	});
	popupMenu.inflate(R.menu.desk_clock_menu);

	Menu menu = popupMenu.getMenu();
	MenuItem help = menu.findItem(R.id.menu_item_help);
	if (help != null) {
	Utils.prepareHelpMenuItem(this, help);
	}
	popupMenu.show();
	}

	/***
	* Insert the local time zone as the Home Time Zone if one is not set
	*/
	private void setHomeTimeZone() {
	SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
	String homeTimeZone = prefs.getString(SettingsActivity.KEY_HOME_TZ, "");
	if (!homeTimeZone.isEmpty()) {
	return;
	}
	homeTimeZone = TimeZone.getDefault().getID();
	SharedPreferences.Editor editor = prefs.edit();
	editor.putString(SettingsActivity.KEY_HOME_TZ, homeTimeZone);
	editor.apply();
	Log.v(LOG_TAG, "Setting home time zone to " + homeTimeZone);
	}

	public void registerPageChangedListener(DeskClockFragment frag) {
	if (mTabsAdapter != null) {
	mTabsAdapter.registerPageChangedListener(frag);
	}
	}

	public void unregisterPageChangedListener(DeskClockFragment frag) {
	if (mTabsAdapter != null) {
	mTabsAdapter.unregisterPageChangedListener(frag);
	}
	}


	/***
	* Adapter for wrapping together the ActionBar's tab with the ViewPager
	*/

	private class TabsAdapter extends FragmentPagerAdapter
	implements ActionBar.TabListener, ViewPager.OnPageChangeListener {

	private static final String KEY_TAB_POSITION = "tab_position";

	final class TabInfo {
	private final Class<?> clss;
	private final Bundle args;

	TabInfo(Class<?> _class, int position) {
	clss = _class;
	args = new Bundle();
	args.putInt(KEY_TAB_POSITION, position);
	}

	public int getPosition() {
	return args.getInt(KEY_TAB_POSITION, 0);
	}
	}

	private final ArrayList<TabInfo> mTabs = new ArrayList <TabInfo>();
	ActionBar mMainActionBar;
	Context mContext;
	ViewPager mPager;
	// Used for doing callbacks to fragments.
	HashSet<String> mFragmentTags = new HashSet<String>();

	public TabsAdapter(Activity activity, ViewPager pager) {
	super(activity.getFragmentManager());
	mContext = activity;
	mMainActionBar = activity.getActionBar();
	mPager = pager;
	mPager.setAdapter(this);
	mPager.setOnPageChangeListener(this);
	}

	@Override
	public Fragment getItem(int position) {
	TabInfo info = mTabs.get(position);
	DeskClockFragment f = (DeskClockFragment) Fragment.instantiate(
	mContext, info.clss.getName(), info.args);
	return f;
	}

	@Override
	public int getCount() {
	return mTabs.size();
	}

	public void addTab(ActionBar.Tab tab, Class<?> clss, int position) {
	TabInfo info = new TabInfo(clss, position);
	tab.setTag(info);
	tab.setTabListener(this);
	mTabs.add(info);
	mMainActionBar.addTab(tab);
	notifyDataSetChanged();
	}

	@Override
	public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
	// Do nothing
	}

	@Override
	public void onPageSelected(int position) {
	mMainActionBar.setSelectedNavigationItem(position);
	notifyPageChanged(position);
	}

	@Override
	public void onPageScrollStateChanged(int state) {
	// Do nothing
	}

	@Override
	public void onTabReselected(Tab arg0, FragmentTransaction arg1) {
	// Do nothing
	}

	@Override
	public void onTabSelected(Tab tab, FragmentTransaction ft) {
	TabInfo info = (TabInfo)tab.getTag();
	mPager.setCurrentItem(info.getPosition());
	}

	@Override
	public void onTabUnselected(Tab arg0, FragmentTransaction arg1) {
	// Do nothing

	}

	public void notifySelectedPage(int page) {
	notifyPageChanged(page);
	}

	private void notifyPageChanged(int newPage) {
	for (String tag : mFragmentTags) {
	final FragmentManager fm = getFragmentManager();
	DeskClockFragment f = (DeskClockFragment) fm.findFragmentByTag(tag);
	if (f != null) {
	f.onPageChanged(newPage);
	}
	}
	}

	public void registerPageChangedListener(DeskClockFragment frag) {
	String tag = frag.getTag();
	if (mFragmentTags.contains(tag)) {
	Log.wtf(LOG_TAG, "Trying to add an existing fragment " + tag);
	} else {
	mFragmentTags.add(frag.getTag());
	}
	// Since registering a listener by the fragment is done sometimes after the page
	// was already changed, make sure the fragment gets the current page
	frag.onPageChanged(mMainActionBar.getSelectedNavigationIndex());
	}

	public void unregisterPageChangedListener(DeskClockFragment frag) {
	mFragmentTags.remove(frag.getTag());
	}
	}

	public static abstract class OnTapListener implements OnTouchListener {
	private float mLastTouchX;
	private float mLastTouchY;
	private long mLastTouchTime;
	private final TextView mMakePressedTextView;
	private final int mPressedColor, mGrayColor;
	private final float MAX_MOVEMENT_ALLOWED = 20;
	private final long MAX_TIME_ALLOWED = 500;

	public OnTapListener(Activity activity, TextView makePressedView) {
	mMakePressedTextView = makePressedView;
	mPressedColor = activity.getResources().getColor(Utils.getPressedColorId());
	mGrayColor = activity.getResources().getColor(Utils.getGrayColorId());
	}

	@Override
	public boolean onTouch(View v, MotionEvent e) {
	switch (e.getAction()) {
	case (MotionEvent.ACTION_DOWN):
	mLastTouchTime = Utils.getTimeNow();
	mLastTouchX = e.getX();
	mLastTouchY = e.getY();
	if (mMakePressedTextView != null) {
	mMakePressedTextView.setTextColor(mPressedColor);
	}
	break;
	case (MotionEvent.ACTION_UP):
	float xDiff = Math.abs(e.getX()-mLastTouchX);
	float yDiff = Math.abs(e.getY()-mLastTouchY);
	long timeDiff = (Utils.getTimeNow() - mLastTouchTime);
	if (xDiff < MAX_MOVEMENT_ALLOWED && yDiff < MAX_MOVEMENT_ALLOWED
	&& timeDiff < MAX_TIME_ALLOWED) {
	if (mMakePressedTextView != null) {
	v = mMakePressedTextView;
	}
	processClick(v);
	resetValues();
	return true;
	}
	resetValues();
	break;
	case (MotionEvent.ACTION_MOVE):
	xDiff = Math.abs(e.getX()-mLastTouchX);
	yDiff = Math.abs(e.getY()-mLastTouchY);
	if (xDiff >= MAX_MOVEMENT_ALLOWED \|\| yDiff >= MAX_MOVEMENT_ALLOWED) {
	resetValues();
	}
	break;
	default:
	resetValues();
	}
	return false;
	}

	private void resetValues() {
	mLastTouchX = -1*MAX_MOVEMENT_ALLOWED + 1;
	mLastTouchY = -1*MAX_MOVEMENT_ALLOWED + 1;
	mLastTouchTime = -1*MAX_TIME_ALLOWED + 1;
	if (mMakePressedTextView != null) {
	mMakePressedTextView.setTextColor(mGrayColor);
	}
	}

	protected abstract void processClick(View v);
	}

	/ Called by the LabelDialogFormat class after the dialog is finished. /
	@Override
	public void onDialogLabelSet(TimerObj timer, String label, String tag) {
	Fragment frag = getFragmentManager().findFragmentByTag(tag);
	if (frag instanceof TimerFragment) {
	((TimerFragment) frag).setLabel(timer, label);
	}
	}
	}