Android Open Source - interdroid-vdb-ui Branch Expandable List Adapter

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The source code is released under:
Copyright (c) 2008-2011 Vrije Universiteit, The Netherlands All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the follo...
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Java Source Code

/*
 * Copyright (c) 2008-2012 Vrije Universiteit, The Netherlands All rights
 * reserved.//  ww  w. j av a 2 s.c om
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * Neither the name of the Vrije Universiteit nor the names of its contributors
 * may be used to endorse or promote products derived from this software without
 * specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */
package interdroid.vdb.persistence.ui;

import java.io.IOException;
import java.util.ArrayList;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import interdroid.vdb.R;
import interdroid.vdb.persistence.api.VdbRepository;

import android.content.Context;
import android.net.Uri;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseExpandableListAdapter;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.AbsListView.LayoutParams;

public class BranchExpandableListAdapter extends BaseExpandableListAdapter {
  private static final Logger logger = LoggerFactory
      .getLogger(BranchExpandableListAdapter.class);

  private Context mContext;
  private VdbRepository mRepo;
  private ArrayList<String> mLocalBranches = new ArrayList<String>();
  private ArrayList<String> mRemoteBranches = new ArrayList<String>();
  private GroupType[] mGroups;

  private OnRevisionClickListener mListener;
  private OnRevisionClickListener mInternalListener = new OnRevisionClickListener() {
    @Override
    public void onRevisionClick(Uri uri) {
      if (mListener != null) {
        mListener.onRevisionClick(uri);
      }
    }
    @Override
    public void onRevisionLongClick(Uri uri) {
      if (mListener != null) {
        mListener.onRevisionLongClick(uri);
      }
    }
  };

  public interface OnRevisionClickListener {
    public void onRevisionClick(Uri uri);
    public void onRevisionLongClick(Uri uri);
  }

  public void setOnRevisionClickListener(OnRevisionClickListener listener) {
    mListener = listener;
  }

  public enum GroupType {
    LOCAL_BRANCHES,
    REMOTE_BRANCHES
  }

  @Override
  public void notifyDataSetChanged() {
    refreshBranches();
    super.notifyDataSetChanged();
  }

  public void notifyDataSetInvalidated() {
    refreshBranches();
    super.notifyDataSetInvalidated();
  }

  public BranchExpandableListAdapter(Context context, VdbRepository repo,  GroupType... groupsToShow) {
    mContext = context;
    if (repo == null) {
      throw new IllegalArgumentException("Repo is null.");
    }
    mRepo = repo;
    if (groupsToShow == null || groupsToShow.length < 1 || groupsToShow.length > 2) {
      throw new IllegalArgumentException("Inalid group count.");
    }
    mGroups = groupsToShow;
    refreshBranches();
  }

  private void refreshBranches() {
    try {
      for (GroupType group : mGroups) {
        switch (group) {
        case LOCAL_BRANCHES:
          logger.debug("Loading local branches");
          mLocalBranches.clear();
          mLocalBranches.addAll(mRepo.listBranches());
          logger.debug("Loaded: {}", mLocalBranches.size());
          break;
        case REMOTE_BRANCHES:
          logger.debug("Loading remote branches");
          mRemoteBranches.clear();
          mRemoteBranches.addAll(mRepo.listRemoteBranches());
          logger.debug("Loaded: {}", mRemoteBranches.size());
          break;
        }
      }
    } catch (IOException e) {
      throw new RuntimeException(e);
    }
  }

  @Override
  public int getGroupCount() {
    return mGroups.length;
  }

  @Override
  public int getChildrenCount(int groupPosition) {
    switch(mGroups[groupPosition]) {
    case LOCAL_BRANCHES:
      return mLocalBranches.size();
    case REMOTE_BRANCHES:
      return mRemoteBranches.size();
    default:
      throw new IllegalArgumentException("Unknow group position: " + groupPosition);
    }
  }

  @Override
  public Object getGroup(int groupPosition) {
    return mGroups[groupPosition];
  }

  @Override
  public Object getChild(int groupPosition, int childPosition) {
    switch(mGroups[groupPosition]) {
    case LOCAL_BRANCHES:
      return mLocalBranches.get(childPosition);
    case REMOTE_BRANCHES:
      return mRemoteBranches.get(childPosition);
    default:
      throw new IllegalArgumentException("Unknown child position: " + groupPosition + " : " + childPosition);
    }
  }

  @Override
  public long getGroupId(int groupPosition) {
    return mGroups[groupPosition].ordinal();
  }

  @Override
  public long getChildId(int groupPosition, int childPosition) {
    switch(mGroups[groupPosition]) {
    case LOCAL_BRANCHES:
      return mLocalBranches.get(childPosition).hashCode() + (getGroupId(groupPosition) * 11);
    case REMOTE_BRANCHES:
      return mRemoteBranches.get(childPosition).hashCode() + (getGroupId(groupPosition) * 11);
    default:
      throw new IllegalArgumentException("Unknown child position: " + groupPosition + " : " + childPosition);
    }
  }

  @Override
  public boolean hasStableIds() {
    return true;
  }

  @Override
  public View getGroupView(int groupPosition, boolean isExpanded,
      View convertView, ViewGroup parent) {
    TextView view;
    if (convertView == null) {
      view = new TextView(mContext);
      view.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, 60));
      view.setGravity(Gravity.CENTER_VERTICAL | Gravity.LEFT);
      view.setPadding(60, 0, 0, 0);
      view.setTextSize(14);
    } else {
      view = (TextView)convertView;
    }

    switch(mGroups[groupPosition]) {
    case LOCAL_BRANCHES:
      view.setText(R.string.label_local_branches);
      break;
    case REMOTE_BRANCHES:
      view.setText(R.string.label_remote_branches);
      break;
      default:
        throw new IllegalArgumentException("Unknown group: " + groupPosition);
    }

    return view;
  }

  @Override
  public View getChildView(int groupPosition, int childPosition,
      boolean isLastChild, View convertView, ViewGroup parent) {
    logger.debug("Building child view: {} {}", groupPosition, childPosition);
    // TODO: Recover with convertView;
    switch(mGroups[groupPosition]) {
    case LOCAL_BRANCHES:
      return buildBranchItemView(childPosition, convertView, parent, false);
    case REMOTE_BRANCHES:
      return buildBranchItemView(childPosition, convertView, parent, true);
      default:
        throw new IllegalArgumentException("Unknown group: " + groupPosition);
    }
  }

  private View buildBranchItemView(int childPosition, View convertView,
      ViewGroup parent, boolean remote) {
    View view;
    if (convertView == null) {
      view = LayoutInflater.from(mContext).inflate(R.layout.branchlist_item, parent, false);
    } else {
      view = convertView;
    }
    ImageView folder = (ImageView) view.findViewById(R.id.folder);
    CommitExpandableListView commits = (CommitExpandableListView) view.findViewById(R.id.commits_list);
    if (remote) {
      folder.setImageResource(R.drawable.remotefolder);
      commits.setup(mInternalListener, mRepo, mRemoteBranches.get(childPosition));
    } else {
      folder.setImageResource(R.drawable.homefolder);
      commits.setup(mInternalListener, mRepo, mLocalBranches.get(childPosition));
    }

    return view;
  }

  @Override
  public boolean isChildSelectable(int groupPosition, int childPosition) {
    return true;
  }
}
Java Source Code List
