src/com/owncloud/android/ui/fragment/ExtendedListFragment.java

   1 /* ownCloud Android client application
   2  *   Copyright (C) 2012 Bartek Przybylski
   3  *   Copyright (C) 2012-2013 ownCloud Inc.
   4  *
   5  *   This program is free software: you can redistribute it and/or modify
   6  *   it under the terms of the GNU General Public License version 2,
   7  *   as published by the Free Software Foundation.
   8  *
   9  *   This program is distributed in the hope that it will be useful,
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  *   GNU General Public License for more details.
  13  *
  14  *   You should have received a copy of the GNU General Public License
  15  *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  *
  17  */
  18
  19 package com.owncloud.android.ui.fragment;
  20
  21 import android.os.Bundle;
  22 import android.view.LayoutInflater;
  23 import android.view.View;
  24 import android.view.ViewGroup;
  25 import android.widget.AdapterView;
  26 import android.widget.AdapterView.OnItemClickListener;
  27 import android.widget.ListAdapter;
  28 import android.widget.ListView;
  29
  30 import com.actionbarsherlock.app.SherlockFragment;
  31 import com.owncloud.android.Log_OC;
  32 import com.owncloud.android.R;
  33 import com.owncloud.android.ui.ExtendedListView;
  34
  35 /**
  36  * TODO extending SherlockListFragment instead of SherlockFragment
  37  */
  38 public class ExtendedListFragment extends SherlockFragment implements OnItemClickListener {
  39
  40     private static final String TAG = ExtendedListFragment.class.getSimpleName();
  41
  42     private static final String KEY_SAVED_LIST_POSITION = "SAVED_LIST_POSITION";
  43
  44     protected ExtendedListView mList;
  45
  46     public void setListAdapter(ListAdapter listAdapter) {
  47         mList.setAdapter(listAdapter);
  48         mList.invalidate();
  49     }
  50
  51     public void setFooterView(View footer) {
  52         mList.addFooterView(footer);
  53         mList.invalidate();
  54     }
  55
  56     public ListView getListView() {
  57         return mList;
  58     }
  59
  60     @Override
  61     public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
  62         Log_OC.e(TAG, "onCreateView");
  63         // mList = new ExtendedListView(getActivity());
  64         View v = inflater.inflate(R.layout.list_fragment, null);
  65         mList = (ExtendedListView) (v.findViewById(R.id.list_root));
  66         mList.setOnItemClickListener(this);
  67         // mList.setEmptyView(v.findViewById(R.id.empty_list_view)); // looks
  68         // like it's not a cool idea
  69         mList.setDivider(getResources().getDrawable(R.drawable.uploader_list_separator));
  70         mList.setDividerHeight(1);
  71
  72         if (savedInstanceState != null) {
  73             int referencePosition = savedInstanceState.getInt(KEY_SAVED_LIST_POSITION);
  74             setReferencePosition(referencePosition);
  75         }
  76
  77         return v;
  78     }
  79
  80     @Override
  81     public void onSaveInstanceState(Bundle savedInstanceState) {
  82         super.onSaveInstanceState(savedInstanceState);
  83         Log_OC.e(TAG, "onSaveInstanceState()");
  84         savedInstanceState.putInt(KEY_SAVED_LIST_POSITION, getReferencePosition());
  85     }
  86
  87     /**
  88      * Calculates the position of the item that will be used as a reference to
  89      * reposition the visible items in the list when the device is turned to
  90      * other position.
  91      *
  92      * THe current policy is take as a reference the visible item in the center
  93      * of the screen.
  94      *
  95      * @return The position in the list of the visible item in the center of the
  96      *         screen.
  97      */
  98     protected int getReferencePosition() {
  99         if (mList != null) {
 100             return (mList.getFirstVisiblePosition() + mList.getLastVisiblePosition()) / 2;
 101         } else {
 102             return 0;
 103         }
 104     }
 105
 106     /**
 107      * Sets the visible part of the list from the reference position.
 108      *
 109      * @param position Reference position previously returned by
 110      *            {@link LocalFileListFragment#getReferencePosition()}
 111      */
 112     protected void setReferencePosition(int position) {
 113         if (mList != null) {
 114             mList.setAndCenterSelection(position);
 115         }
 116     }
 117
 118     @Override
 119     public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
 120         // to be @overriden
 121     }
 122
 123 }