/*
* 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.GetFeatureInfoLayerListActivity;
import it.geosolutions.android.map.adapters.FeatureInfoAttributesAdapter;
import it.geosolutions.android.map.common.Constants;
import it.geosolutions.android.map.loaders.FeatureInfoLoader;
import it.geosolutions.android.map.model.Feature;
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.BBoxQuery;
import it.geosolutions.android.map.model.query.FeatureInfoTaskQuery;
import it.geosolutions.android.map.model.query.PolygonQuery;
import it.geosolutions.android.map.utils.FeatureInfoUtils;
import java.util.ArrayList;
import java.util.List;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.LoaderManager;
import android.support.v4.content.Loader;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.ImageButton;
import android.widget.TextView;
import com.actionbarsherlock.app.SherlockListFragment;
/**
* This fragment shows a view o the attributes of a single feature from a
* selected layer Supports pagination and returns to the activity in case of
* selection.
*
* @author Lorenzo Natali (www.geo-solutions.it)
*/
public class FeatureInfoAttributeListFragment extends SherlockListFragment
implements LoaderManager.LoaderCallbacks<List<FeatureInfoQueryResult>> {
private FeatureInfoAttributesAdapter adapter;
private FeatureInfoTaskQuery[] queryQueue;
// The callbacks through which we will interact with the LoaderManager.
private LoaderManager.LoaderCallbacks<List<FeatureInfoQueryResult>> mCallbacks;
protected Integer start;
protected Integer limit;
protected BaseFeatureInfoQuery query;
protected ArrayList<Layer> layers;
protected ArrayList<Feature> currentFeatures;
/**
* Called only once
*/
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// view operations
setRetainInstance(true);
// start progress bars
getSherlockActivity().setSupportProgressBarIndeterminateVisibility(true);
getSherlockActivity().setSupportProgressBarVisibility(true);
// get data from the intent
// TODO get them from arguments
Bundle extras = getActivity().getIntent().getExtras();
;
layers = (ArrayList<Layer>) extras.getSerializable(Constants.ParamKeys.LAYERS);
start = extras.getInt("start");
limit = extras.getInt("limit");
// setup the listView
adapter = new FeatureInfoAttributesAdapter(getSherlockActivity(),
R.layout.feature_info_attribute_row);
setListAdapter(adapter);
query = extras.getParcelable("query");
// TODO get already loaded data;
startDataLoading(query, layers, start, 2);// use 2 to check availability of the next page
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
startDataLoading(query, layers, start, 2);
return inflater.inflate(R.layout.feature_info_attribute_list, container,
false);
}
/*
* (non-Javadoc)
* @see android.support.v4.app.ListFragment#onViewCreated(android.view.View,
* android.os.Bundle)
*/
@Override
public void onViewCreated(View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
setButtonBarVisibility(currentFeatures);
startLoadingGUI();
ImageButton prev = (ImageButton) view.findViewById(R.id.previousButton);
ImageButton next = (ImageButton) view.findViewById(R.id.nextButton);
ImageButton marker = (ImageButton) view.findViewById(R.id.use_for_marker);
// load the previous page on click
prev.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
startLoadingGUI();
adapter.clear();
start--;
startDataLoading(query, layers, start, 2);
}
});
// load the next page on press
next.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
startLoadingGUI();
adapter.clear();
start++;
startDataLoading(query, layers, start, 2);
}
});
// show a dialog and return if ok
final Context context = this.getActivity();
marker.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
AlertDialog.Builder confirm = new AlertDialog.Builder(context);
confirm.setTitle(R.string.use_this_feature);
confirm.setMessage(R.string.use_this_feature_description);
confirm.setPositiveButton(android.R.string.ok,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
returnSelectedItem();
}
});
confirm.setNegativeButton(android.R.string.cancel,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
// TODO close
dialog.cancel();
}
});
AlertDialog alert = confirm.create();
alert.show();
}
});
}
/**
* Create an array of <BaseFeatureInfoQuery> to pass to the loader and
* initialize the loader
*
* @param query the <BaseFeatureInfoQuery>
* @param layers array of <String> to generate the queryQueue
* @param start
* @param limit
*/
private void startDataLoading(BaseFeatureInfoQuery query, ArrayList<Layer> layers,
Integer start, Integer limit) {
// create task query
if(query instanceof BBoxQuery)
queryQueue = FeatureInfoUtils.createTaskQueryQueue(layers, (BBoxQuery) query, start,
limit);
else
if(query instanceof CircleQuery)
queryQueue = FeatureInfoUtils.createTaskQueryQueue(layers, (CircleQuery) query, start,
limit);
else
queryQueue = FeatureInfoUtils.createTaskQueryQueue(layers, (PolygonQuery) query, start,
limit);
// 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(start, null, this); // uses start to get the
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
}
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
// mCallbacks = (TaskCallbacks) activity;
}
@Override
public void onDetach() {
super.onDetach();
// mCallbacks = null;
}
/*
* (non-Javadoc)
* @see android.support.v4.app.LoaderManager.LoaderCallbacks#onCreateLoader(int,
* android.os.Bundle)
*/
@Override
public Loader<List<FeatureInfoQueryResult>> onCreateLoader(int id, Bundle args) {
return new FeatureInfoLoader(getSherlockActivity(), queryQueue);
}
// populate the list and set buttonbar visibility options
@Override
public void onLoadFinished(Loader<List<FeatureInfoQueryResult>> loader,
List<FeatureInfoQueryResult> data) {
setListAdapter(adapter);
if (data.size() > 0) {
// only one layer display
FeatureInfoQueryResult result = data.get(0);
currentFeatures = result.getFeatures();
setButtonBarVisibility(currentFeatures);
if (currentFeatures.size() > 0) {
// only the first feature display.
// other will be used to check availability
adapter.addAll(currentFeatures.get(0));
}
} else {
setButtonBarVisibility(null);
}
Log.v("FEATURE_INFO", "added " + adapter.getCount() + " items to the view");
stopLoadingGUI();
}
/**
* sets no data view in default listview empty text
*/
private void setNoData() {
((TextView) getView().findViewById(R.id.empty_text))
.setText(R.string.feature_info_extracting_no_result);
}
/**
* Set the loading bar and loading text
*/
private void startLoadingGUI() {
if (getSherlockActivity() != null) {
// start progress bars
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();
}
/**
* Set the visibility using the size of the features
*
* @param features
*/
private void setButtonBarVisibility(ArrayList<Feature> features) {
if (features == null) {
getView().findViewById(R.id.attributeButtonBar).setVisibility(
View.INVISIBLE);
setNoData();
return;
}
if (features.size() > 0) {
getView().findViewById(R.id.attributeButtonBar).setVisibility(
View.VISIBLE);
//previous button
if (start > 0) {
getView().findViewById(R.id.previousButton).setVisibility(
View.VISIBLE);
} else {
getView().findViewById(R.id.previousButton).setVisibility(
View.INVISIBLE);
}
//next button
if (features.size() > 1) {
getView().findViewById(R.id.nextButton).setVisibility(View.VISIBLE);
} else {
getView().findViewById(R.id.nextButton).setVisibility(
View.INVISIBLE);
}
//marker button
if(Intent.ACTION_VIEW.equals(getActivity().getIntent().getAction())){
getView().findViewById(R.id.use_for_marker).setVisibility(View.INVISIBLE);
}else{
getView().findViewById(R.id.use_for_marker).setVisibility(View.VISIBLE);
}
} else {
getView().findViewById(R.id.attributeButtonBar).setVisibility(
View.INVISIBLE);
setNoData();
}
}
@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();
}
private void returnSelectedItem() {
Intent returnIntent = new Intent();
Activity activity = getSherlockActivity();
// get current markers
// currentFeatures is present
if (currentFeatures != null && currentFeatures.size() > 0) {
returnIntent.putExtra(
GetFeatureInfoLayerListActivity.RESULT_FEATURE_EXTRA,
currentFeatures.get(0));
returnIntent.putExtra(
GetFeatureInfoLayerListActivity.LAYER_FEATURE_EXTRA,
layers.get(0));
activity.setResult(Activity.RESULT_OK, returnIntent);
}
activity.finish();
}
}