/*
* GeoSolutions map - Digital field mapping on Android based devices
* Copyright (C) 2013 GeoSolutions (www.geo-solutions.it)
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package it.geosolutions.android.map.fragment.featureinfo;
import it.geosolutions.android.map.R;
import it.geosolutions.android.map.activities.GetFeatureInfoAttributeActivity;
import it.geosolutions.android.map.adapters.FeatureInfoLayerAdapter;
import it.geosolutions.android.map.common.Constants;
import it.geosolutions.android.map.loaders.FeatureInfoLoader;
import it.geosolutions.android.map.model.Layer;
import it.geosolutions.android.map.model.query.BaseFeatureInfoQuery;
import it.geosolutions.android.map.model.query.CircleQuery;
import it.geosolutions.android.map.model.query.FeatureInfoQueryResult;
import it.geosolutions.android.map.model.query.FeatureInfoTaskQuery;
import it.geosolutions.android.map.model.query.PolygonQuery;
import it.geosolutions.android.map.model.query.BBoxQuery;
import it.geosolutions.android.map.utils.FeatureInfoUtils;
import java.util.ArrayList;
import java.util.List;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.LoaderManager;
import android.support.v4.app.LoaderManager.LoaderCallbacks;
import android.support.v4.content.Loader;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.TextView;
import com.actionbarsherlock.app.SherlockListFragment;
/**
* Show a list of the layers from a feature info query This fragment is
* optimized to get only the available features doing a query on the visible
* layers to check if at least one is present.
* @author Lorenzo Natali (www.geo-solutions.it)
*/
public class FeatureInfoLayerListFragment extends SherlockListFragment
implements LoaderCallbacks<List<FeatureInfoQueryResult>> {
private FeatureInfoLayerAdapter adapter;
private static final int LOADER_INDEX =0;
private FeatureInfoTaskQuery[] queryQueue;
/*private BBoxTaskQuery[] queryQueueRect;
private CircleTaskQuery[] queryQueueCircle;
private PolygonTaskQuery[] queryQueuePolygon;*/
// The callbacks through which we will interact with the LoaderManager.
private LoaderManager.LoaderCallbacks<List<FeatureInfoQueryResult>> mCallbacks;
/**
* Called once a time on creation moment
* @param savedInstanceState
*/
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// view operations
setRetainInstance(true);
// get parameters to create the task query
// TODO use arguments instead
Bundle extras = getActivity().getIntent().getExtras();
ArrayList<Layer> layers = (ArrayList<Layer>)extras.getSerializable(Constants.ParamKeys.LAYERS);
// create a unique loader index
// TODO use a better system to get the proper loader
// TODO check if needed,maybe the activity has only one loader
BaseFeatureInfoQuery query = extras.getParcelable("query");
// Create task query
if(query instanceof BBoxQuery){
queryQueue = FeatureInfoUtils.createTaskQueryQueue(layers, (BBoxQuery) query, null, 1);
}
else if(query instanceof CircleQuery){
queryQueue = FeatureInfoUtils.createTaskQueryQueue(layers, (CircleQuery) query, null, 1);
}
else{
queryQueue = FeatureInfoUtils.createTaskQueryQueue(layers, (PolygonQuery) query, null, 1);
}
// Initialize loader and callbacks for the parent activity
// setup the listView
adapter = new FeatureInfoLayerAdapter(getSherlockActivity(),
R.layout.feature_info_layer_list_row);
setListAdapter(adapter);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
startDataLoading(queryQueue, LOADER_INDEX);
return inflater.inflate(R.layout.feature_info_layer_list, container, false);
}
/**
* Set the loading bar and loading text
*/
private void startLoadingGUI() {
if(getSherlockActivity()!=null){
// start progress bars
getSherlockActivity().setSupportProgressBarIndeterminateVisibility(true);
getSherlockActivity().setSupportProgressBarVisibility(true);
}
// set suggestion text
((TextView) getView().findViewById(R.id.empty_text))
.setText(R.string.feature_info_extracting_information);
}
/**
* hide loading bar and set loading task
*/
private void stopLoadingGUI() {
if (getSherlockActivity() != null) {
getSherlockActivity()
.setSupportProgressBarIndeterminateVisibility(false);
getSherlockActivity()
.setSupportProgressBarVisibility(false);
Log.v("FEATURE_INFO_TASK", "task terminated");
}
adapter.notifyDataSetChanged();
}
private void setNoData() {
((TextView) getView().findViewById(R.id.empty_text))
.setText(R.string.feature_info_extracting_no_result);
}
/**
* Create the data loader and bind the loader to the
* parent callbacks
* @param query array of <FeatureInfoTaskQuery> to pass to the loader
* @param loaderIndex a unique id for query loader
*/
private void startDataLoading(FeatureInfoTaskQuery[] query, int loaderIndex) {
// create task query
// initialize Load Manager
mCallbacks = this;
LoaderManager lm = getSherlockActivity().getSupportLoaderManager();
// NOTE: use the start variable as index in the loadermanager
// if you use more than one
adapter.clear();
lm.initLoader(loaderIndex, null, this); // uses start to get the
}
/*
* (non-Javadoc)
* @see android.support.v4.app.ListFragment#onViewCreated(android.view.View,
* android.os.Bundle)
*/
@Override
public void onViewCreated(View view, Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onViewCreated(view, savedInstanceState);
//init progress bar and loading text
startLoadingGUI();
//set the click listener for the items
getListView().setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
Intent i = new Intent(view.getContext(),
GetFeatureInfoAttributeActivity.class);
i.putExtras(getActivity().getIntent().getExtras());
i.removeExtra(Constants.ParamKeys.LAYERS);
// add a list with only one layer
ArrayList<Layer<?>> subList = new ArrayList<Layer<?>>();
FeatureInfoQueryResult item = (FeatureInfoQueryResult) parent
.getAdapter().getItem(position);
subList.add(item.getLayer());
i.putExtra(Constants.ParamKeys.LAYERS, subList);
i.putExtra("start", 0);
i.putExtra("limit", 1);
//don't allow picking the position
String action = getActivity().getIntent().getAction();
i.setAction(action);
getActivity().startActivityForResult(i,
GetFeatureInfoAttributeActivity.GET_ITEM);
}
});
}
/**
* Create the loader
*/
@Override
public Loader<List<FeatureInfoQueryResult>> onCreateLoader(int id, Bundle args) {
return new FeatureInfoLoader(getSherlockActivity(), queryQueue);
}
@Override
public void onLoadFinished(Loader<List<FeatureInfoQueryResult>> loader,
List<FeatureInfoQueryResult> results) {
//for each result, an entry is added to the list if
// it contains a result
for (FeatureInfoQueryResult result : results) {
if (result.getFeatures().size() > 0) {
adapter.add(result);
}
}
if (adapter.isEmpty()) {
setNoData();
}
stopLoadingGUI();
}
@Override
public void onLoaderReset(Loader<List<FeatureInfoQueryResult>> arg0) {
adapter.clear();
}
/*
* (non-Javadoc)
* @see android.support.v4.app.Fragment#onDestroy()
*/
@Override
public void onDestroy() {
// TODO try to kill the load process
super.onDestroy();
}
}