pl.edu.pw.eiti.groupbuying.android.fragment.AbstractListFragment.java Source code

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Here is the source code for pl.edu.pw.eiti.groupbuying.android.fragment.AbstractListFragment.java

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/*******************************************************************************
 * Copyright (c) 2013 Piotr Zawadzki.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the GNU Public License v3.0
 * which accompanies this distribution, and is available at
 * http://www.gnu.org/licenses/gpl.html
 * 
 * Contributors:
 *     Piotr Zawadzki - initial API and implementation
 ******************************************************************************/
package pl.edu.pw.eiti.groupbuying.android.fragment;

import pl.edu.pw.eiti.groupbuying.android.GroupBuyingApplication;
import pl.edu.pw.eiti.groupbuying.android.MainMenuActivity;
import pl.edu.pw.eiti.groupbuying.android.R;
import pl.edu.pw.eiti.groupbuying.android.fragment.util.NoInternetListener;
import pl.edu.pw.eiti.groupbuying.android.util.NetUtils;
import android.app.Activity;
import android.support.v4.app.Fragment;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.LinearLayout;
import android.widget.ListAdapter;
import android.widget.TextView;

import com.handmark.pulltorefresh.library.PullToRefreshListView;

public abstract class AbstractListFragment extends Fragment implements OnItemClickListener, NoInternetListener {

    protected static final int VISIBLE_ITEM_THRESHOLD = 3;

    protected PullToRefreshListView listView;
    protected View loadingView;
    protected View emptyView;
    protected LinearLayout noInternetLayout;
    protected GroupBuyingApplication application;
    protected MainMenuActivity mainActivity;
    protected boolean endOfItemsReached = false;

    protected int currentPage = -1;
    protected boolean loadingMoreItems = false;
    protected boolean loading = false;

    protected boolean connectionAvailable = true;

    public enum ListViewState {
        LOADING, CONTENT, EMPTY, NO_INTERNET
    }

    @Override
    public void onAttach(Activity activity) {
        super.onAttach(activity);
        application = (GroupBuyingApplication) activity.getApplication();
        mainActivity = (MainMenuActivity) activity;
    }

    public PullToRefreshListView getListView() {
        return listView;
    }

    public void setListAdapter(ListAdapter adapter) {
        listView.getRefreshableView().setAdapter(adapter);
    }

    protected ListAdapter getListAdapter() {
        if (listView == null) {
            return null;
        }
        return listView.getRefreshableView().getAdapter();
    }

    protected void setListViewState(final ListViewState newState) {
        setListViewState(newState, null, null);
    }

    protected void setListViewState(final ListViewState newState, final String title, final String message) {
        switch (newState) {
        case LOADING:
            listView.setVisibility(View.GONE);
            emptyView.setVisibility(View.GONE);
            loadingView.setVisibility(View.VISIBLE);
            noInternetLayout.setVisibility(View.GONE);
            break;
        case CONTENT:
            listView.setVisibility(View.VISIBLE);
            emptyView.setVisibility(View.GONE);
            loadingView.setVisibility(View.GONE);
            noInternetLayout.setVisibility(View.GONE);
            break;
        case EMPTY:
            listView.setVisibility(View.GONE);
            emptyView.setVisibility(View.VISIBLE);
            loadingView.setVisibility(View.GONE);
            noInternetLayout.setVisibility(View.GONE);
            break;
        case NO_INTERNET:
            listView.setVisibility(View.GONE);
            emptyView.setVisibility(View.GONE);
            loadingView.setVisibility(View.GONE);
            if (title != null) {
                TextView noInternetTextTop = (TextView) noInternetLayout.findViewById(R.id.noInternetTextTop);
                noInternetTextTop.setText(title);
            }
            if (message != null) {
                TextView noInternetTextBottom = (TextView) noInternetLayout.findViewById(R.id.noInternetTextBottom);
                noInternetTextBottom.setText(message);
            }
            noInternetLayout.setVisibility(View.VISIBLE);
            break;
        }
    }

    public void setUpNoInternetButton(final View noInternetView, final NoInternetListener listener) {
        noInternetView.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                if (NetUtils.isOnline(getActivity())) {
                    listener.onDeviceOnline();
                }
            }
        });
    }

    @Override
    public void onResume() {
        super.onResume();
    }

    public abstract void refreshList();

    public boolean isLoading() {
        return loadingMoreItems;
    }

    public boolean isConnectionAvailable() {
        return connectionAvailable;
    }
}