content: /*
   * 	   Created by Daniel Nadeau
   * 	   daniel.nadeau01@gmail.com
   * 	   danielnadeau.blogspot.com
   * 
   * 	   Licensed to the Apache Software Foundation (ASF) under one
         or more contributor license agreements.  See the NOTICE file
         distributed with this work for additional information
         regarding copyright ownership.  The ASF licenses this file
         to you 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.echo.holographlibrarysample;
  
  import android.os.Bundle;
  import android.support.v4.app.Fragment;
  import android.support.v4.app.FragmentStatePagerAdapter;
  import android.support.v4.app.FragmentTransaction;
  import android.support.v4.view.ViewPager;
  import android.support.v7.app.ActionBar;
  import android.support.v7.app.ActionBarActivity;
  
  import java.util.ArrayList;
  
  public class MainActivity extends ActionBarActivity {
  
  	ViewPager mViewPager;
      TabsAdapter mTabsAdapter;
  	
  	@Override
  	protected void onCreate(Bundle savedInstanceState) {
  		super.onCreate(savedInstanceState);
  		setContentView(R.layout.activity_main);
  		
  		mViewPager = (ViewPager)this.findViewById(R.id.view_pager);
  		final ActionBar bar = this.getSupportActionBar();
  		bar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
  		
  		LineFragment lineFrag = new LineFragment();
          BarFragment barFrag = new BarFragment();
          PieFragment pieFrag = new PieFragment();
          MultiSeriesDonutFragment multiSeriesDonutFrag = new MultiSeriesDonutFragment();
  		
          mTabsAdapter = new TabsAdapter(this, mViewPager);
          mTabsAdapter.addTab(bar.newTab().setText("Line"),
                  LineFragment.class, null, lineFrag);
          mTabsAdapter.addTab(bar.newTab().setText("Bar"),
                  BarFragment.class, null, barFrag);
          mTabsAdapter.addTab(bar.newTab().setText("Pie"),
                  PieFragment.class, null, pieFrag);
          mTabsAdapter.addTab(bar.newTab().setText("Donut"),
                  MultiSeriesDonutFragment.class, null, multiSeriesDonutFrag);
          mViewPager.setOffscreenPageLimit(mTabsAdapter.getCount()-1);
  	}
  	
  	public static class TabsAdapter extends FragmentStatePagerAdapter implements ActionBar.TabListener, ViewPager.OnPageChangeListener {
  
  		private final MainActivity mContext;
          private final ActionBar mActionBar;
          private final ViewPager mViewPager;
          private final ArrayList<TabInfo> mTabs = new ArrayList<TabInfo>();
          private final ArrayList<Fragment> mFrag = new ArrayList<Fragment>();
  
          @Override
          public void onTabSelected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {
              Object tag = tab.getTag();
              for (int i=0; i<mTabs.size(); i++) {
                  if (mTabs.get(i) == tag) {
                      mViewPager.setCurrentItem(i);
                  }
              }
          }
  
          @Override
          public void onTabUnselected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {
  
          }
  
          @Override
          public void onTabReselected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {
  
          }
  
          static final class TabInfo {
              private final Class<?> clss;
              private final Bundle args;
  
              TabInfo(Class<?> _class, Bundle _args) {
                  clss = _class;
                  args = _args;
              }
          }
  
          public TabsAdapter(MainActivity activity, ViewPager pager) {
              super(activity.getSupportFragmentManager());
              mContext = activity;
              mActionBar = activity.getSupportActionBar();
              mViewPager = pager;
              mViewPager.setAdapter(this);
              mViewPager.setOnPageChangeListener(this);
          }
  
          public void addTab(ActionBar.Tab tab, Class<?> clss, Bundle args, Fragment frag) {
              TabInfo info = new TabInfo(clss, args);
              tab.setTag(info);
              tab.setTabListener(this);
              mTabs.add(info);
              mFrag.add(frag);
              mActionBar.addTab(tab);
              notifyDataSetChanged();
          }
  
          @Override
          public int getCount() {
              return mTabs.size();
          }
  
          @Override
          public Fragment getItem(int position) {
              TabInfo info = mTabs.get(position);
              return mFrag.get(position);
          }
  
          @Override
          public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
          }
  
          @Override
          public void onPageSelected(int position) {
              mActionBar.setSelectedNavigationItem(position);
              /*
              MenuInflater inflater = mContext.getSupportMenuInflater();
              mContext.menu.clear();
              inflater.inflate(R.menu.MainActivity, mContext.menu);
              */
          }
  
          @Override
          public void onPageScrollStateChanged(int state) {
          }
      }
  
  }
  