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      1 /*
      2  * Copyright (C) 2011 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 package com.android.contacts.detail;
     17 
     18 import android.os.Parcelable;
     19 import android.support.v4.view.PagerAdapter;
     20 import android.support.v4.view.ViewPager;
     21 import android.view.View;
     22 import android.view.ViewGroup;
     23 
     24 /**
     25  * Adapter for the {@link ViewPager} for the contact detail page for a contact with social updates.
     26  */
     27 public class ContactDetailViewPagerAdapter extends PagerAdapter {
     28 
     29     public static final String ABOUT_FRAGMENT_TAG = "view-pager-about-fragment";
     30     public static final String UPDTES_FRAGMENT_TAG = "view-pager-updates-fragment";
     31 
     32     private static final int INDEX_ABOUT_FRAGMENT = 0;
     33     private static final int INDEX_UPDATES_FRAGMENT = 1;
     34 
     35     private static final int MAX_FRAGMENT_VIEW_COUNT = 2;
     36 
     37     private int mFragmentViewCount = MAX_FRAGMENT_VIEW_COUNT;
     38 
     39     private View mAboutFragmentView;
     40     private View mUpdatesFragmentView;
     41 
     42     public ContactDetailViewPagerAdapter() {
     43     }
     44 
     45     public void setAboutFragmentView(View view) {
     46         mAboutFragmentView = view;
     47     }
     48 
     49     public void setUpdatesFragmentView(View view) {
     50         mUpdatesFragmentView = view;
     51     }
     52 
     53     /**
     54      * Enable swiping if the detail and update fragments should be showing. Otherwise diable
     55      * swiping if only the detail fragment should be showing.
     56      */
     57     public void enableSwipe(boolean enable) {
     58         mFragmentViewCount = enable ? MAX_FRAGMENT_VIEW_COUNT : 1;
     59         notifyDataSetChanged();
     60     }
     61 
     62     @Override
     63     public int getCount() {
     64         return mFragmentViewCount;
     65     }
     66 
     67     /** Gets called when the number of items changes. */
     68     @Override
     69     public int getItemPosition(Object object) {
     70         if (object == mAboutFragmentView) {
     71             return INDEX_ABOUT_FRAGMENT;
     72         }
     73         if (object == mUpdatesFragmentView) {
     74             return INDEX_UPDATES_FRAGMENT;
     75         }
     76         return POSITION_NONE;
     77     }
     78 
     79     @Override
     80     public void startUpdate(View container) {
     81     }
     82 
     83     @Override
     84     public Object instantiateItem(View container, int position) {
     85         switch (position) {
     86             case INDEX_ABOUT_FRAGMENT:
     87                 return mAboutFragmentView;
     88             case INDEX_UPDATES_FRAGMENT:
     89                 return mUpdatesFragmentView;
     90         }
     91         throw new IllegalArgumentException("Invalid position: " + position);
     92     }
     93 
     94     @Override
     95     public void destroyItem(View container, int position, Object object) {
     96     }
     97 
     98     @Override
     99     public void finishUpdate(View container) {
    100     }
    101 
    102     @Override
    103     public boolean isViewFromObject(View view, Object object) {
    104         return ((View) object) == view;
    105     }
    106 
    107     @Override
    108     public Parcelable saveState() {
    109         return null;
    110     }
    111 
    112     @Override
    113     public void restoreState(Parcelable state, ClassLoader loader) {
    114     }
    115 }
    116