/*
* Copyright 2012 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.google.android.apps.iosched.ui;
import com.google.android.apps.iosched.R;
import com.google.android.apps.iosched.provider.ScheduleContract;
import com.google.android.apps.iosched.util.UIUtils;
import com.actionbarsherlock.app.SherlockListFragment;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.database.Cursor;
import android.graphics.Color;
import android.net.Uri;
import android.os.Bundle;
import android.provider.BaseColumns;
import android.support.v4.app.ListFragment;
import android.support.v4.app.LoaderManager;
import android.support.v4.content.CursorLoader;
import android.support.v4.content.Loader;
import android.text.Spannable;
import android.view.View;
import android.view.ViewGroup;
import android.widget.CursorAdapter;
import android.widget.ListView;
import android.widget.TextView;
import static com.google.android.apps.iosched.util.LogUtils.LOGD;
import static com.google.android.apps.iosched.util.LogUtils.makeLogTag;
import static com.google.android.apps.iosched.util.UIUtils.buildStyledSnippet;
/**
* A {@link ListFragment} showing a list of developer sandbox companies.
*/
public class VendorsFragment extends SherlockListFragment implements
LoaderManager.LoaderCallbacks<Cursor> {
private static final String TAG = makeLogTag(VendorsFragment.class);
private static final String STATE_SELECTED_ID = "selectedId";
private Uri mVendorsUri;
private CursorAdapter mAdapter;
private String mSelectedVendorId;
private boolean mHasSetEmptyText = false;
public interface Callbacks {
/** Return true to select (activate) the vendor in the list, false otherwise. */
public boolean onVendorSelected(String vendorId);
}
private static Callbacks sDummyCallbacks = new Callbacks() {
@Override
public boolean onVendorSelected(String vendorId) {
return true;
}
};
private Callbacks mCallbacks = sDummyCallbacks;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (savedInstanceState != null) {
mSelectedVendorId = savedInstanceState.getString(STATE_SELECTED_ID);
}
reloadFromArguments(getArguments());
}
public void reloadFromArguments(Bundle arguments) {
// Teardown from previous arguments
setListAdapter(null);
// Load new arguments
final Intent intent = BaseActivity.fragmentArgumentsToIntent(arguments);
mVendorsUri = intent.getData();
final int vendorQueryToken;
if (mVendorsUri == null) {
return;
}
mAdapter = new VendorsAdapter(getActivity());
vendorQueryToken = VendorsQuery._TOKEN;
setListAdapter(mAdapter);
// Start background query to load vendors
getLoaderManager().initLoader(vendorQueryToken, null, this);
}
public void setSelectedVendorId(String id) {
mSelectedVendorId = id;
if (mAdapter != null) {
mAdapter.notifyDataSetChanged();
}
}
@Override
public void onViewCreated(View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
view.setBackgroundColor(Color.WHITE);
final ListView listView = getListView();
listView.setSelector(android.R.color.transparent);
listView.setCacheColorHint(Color.WHITE);
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
if (!mHasSetEmptyText) {
// Could be a bug, but calling this twice makes it become visible
// when it shouldn't be visible.
setEmptyText(getString(R.string.empty_vendors));
mHasSetEmptyText = true;
}
}
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
if (!(activity instanceof Callbacks)) {
throw new ClassCastException("Activity must implement fragment's callbacks.");
}
mCallbacks = (Callbacks) activity;
}
@Override
public void onDetach() {
super.onDetach();
mCallbacks = sDummyCallbacks;
}
@Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
if (mSelectedVendorId != null) {
outState.putString(STATE_SELECTED_ID, mSelectedVendorId);
}
}
/** {@inheritDoc} */
@Override
public void onListItemClick(ListView l, View v, int position, long id) {
final Cursor cursor = (Cursor) mAdapter.getItem(position);
String vendorId = cursor.getString(VendorsQuery.VENDOR_ID);
if (mCallbacks.onVendorSelected(vendorId)) {
mSelectedVendorId = vendorId;
mAdapter.notifyDataSetChanged();
}
}
@Override
public Loader<Cursor> onCreateLoader(int id, Bundle data) {
return new CursorLoader(getActivity(), mVendorsUri, VendorsQuery.PROJECTION, null, null,
ScheduleContract.Vendors.DEFAULT_SORT);
}
@Override
public void onLoadFinished(Loader<Cursor> loader, Cursor cursor) {
if (getActivity() == null) {
return;
}
int token = loader.getId();
if (token == VendorsQuery._TOKEN) {
mAdapter.changeCursor(cursor);
} else {
cursor.close();
}
}
@Override
public void onLoaderReset(Loader<Cursor> cursor) {
}
/**
* {@link CursorAdapter} that renders a {@link VendorsQuery}.
*/
private class VendorsAdapter extends CursorAdapter {
public VendorsAdapter(Context context) {
super(context, null, false);
}
/** {@inheritDoc} */
@Override
public View newView(Context context, Cursor cursor, ViewGroup parent) {
return getActivity().getLayoutInflater().inflate(R.layout.list_item_vendor,
parent, false);
}
/** {@inheritDoc} */
@Override
public void bindView(View view, Context context, Cursor cursor) {
UIUtils.setActivatedCompat(view, cursor.getString(VendorsQuery.VENDOR_ID)
.equals(mSelectedVendorId));
((TextView) view.findViewById(R.id.vendor_name)).setText(
cursor.getString(VendorsQuery.NAME));
}
}
/**
* {@link com.google.android.apps.iosched.provider.ScheduleContract.Vendors}
* query parameters.
*/
private interface VendorsQuery {
int _TOKEN = 0x1;
String[] PROJECTION = {
BaseColumns._ID,
ScheduleContract.Vendors.VENDOR_ID,
ScheduleContract.Vendors.VENDOR_NAME,
};
int _ID = 0;
int VENDOR_ID = 1;
int NAME = 2;
}
}