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/*
* Copyright (C) 2012 Google Inc.
* Licensed to The Android Open Source Project.
*
* 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.android.email.provider;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.DialogInterface.OnCancelListener;
import android.content.DialogInterface.OnClickListener;
import android.content.DialogInterface.OnMultiChoiceClickListener;
import android.database.Cursor;
import android.net.Uri;
import android.view.View;
import android.widget.AdapterView;
import android.widget.Button;
import com.android.mail.R;
import com.android.mail.providers.Folder;
import com.android.mail.providers.UIProvider;
import com.android.mail.ui.FolderSelectorAdapter;
import com.android.mail.ui.FolderSelectorAdapter.FolderRow;
import com.android.mail.ui.SeparatedFolderListAdapter;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map.Entry;
public class FolderPickerDialog implements OnClickListener, OnMultiChoiceClickListener,
OnCancelListener {
private final AlertDialog mDialog;
private final HashMap<Folder, Boolean> mCheckedState;
private final SeparatedFolderListAdapter mAdapter;
private final FolderPickerCallback mCallback;
public FolderPickerDialog(final Context context, Uri uri,
FolderPickerCallback callback, String header, boolean cancelable) {
mCallback = callback;
// Mapping of a folder's uri to its checked state
mCheckedState = new HashMap<Folder, Boolean>();
AlertDialog.Builder builder = new AlertDialog.Builder(context);
builder.setTitle(header);
builder.setPositiveButton(R.string.ok, this);
builder.setCancelable(cancelable);
builder.setOnCancelListener(this);
// TODO: Do this on a background thread
final Cursor foldersCursor = context.getContentResolver().query(
uri, UIProvider.FOLDERS_PROJECTION, null, null, null);
try {
mAdapter = new SeparatedFolderListAdapter();
mAdapter.addSection(new FolderPickerSelectorAdapter(context, foldersCursor,
new HashSet<String>(), R.layout.multi_folders_view));
builder.setAdapter(mAdapter, this);
} finally {
foldersCursor.close();
}
mDialog = builder.create();
}
public void show() {
mDialog.show();
mDialog.getListView().setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
final Object item = mAdapter.getItem(position);
if (item instanceof FolderRow) {
update((FolderRow) item);
}
}
});
final Button button = mDialog.getButton(AlertDialog.BUTTON_POSITIVE);
if (mCheckedState.size() == 0) {
// No items are selected, so disable the OK button.
button.setEnabled(false);
}
}
/**
* Call this to update the state of folders as a result of them being
* selected / de-selected.
*
* @param row The item being updated.
*/
public void update(FolderSelectorAdapter.FolderRow row) {
// Update the UI
final boolean add = !row.isSelected();
if (!add) {
// This would remove the check on a single radio button, so just
// return.
return;
}
// Clear any other checked items.
mAdapter.getCount();
for (int i = 0; i < mAdapter.getCount(); i++) {
Object item = mAdapter.getItem(i);
if (item instanceof FolderRow) {
((FolderRow)item).setIsSelected(false);
}
}
mCheckedState.clear();
row.setIsSelected(add);
mAdapter.notifyDataSetChanged();
mCheckedState.put(row.getFolder(), add);
// Since we know that an item is selected in the list, enable the OK button
final Button button = mDialog.getButton(AlertDialog.BUTTON_POSITIVE);
button.setEnabled(true);
}
@Override
public void onClick(DialogInterface dialog, int which) {
switch (which) {
case DialogInterface.BUTTON_POSITIVE:
Folder folder = null;
for (Entry<Folder, Boolean> entry : mCheckedState.entrySet()) {
if (entry.getValue()) {
folder = entry.getKey();
break;
}
}
mCallback.select(folder);
break;
default:
onClick(dialog, which, true);
break;
}
}
@Override
public void onClick(DialogInterface dialog, int which, boolean isChecked) {
final FolderRow row = (FolderRow) mAdapter.getItem(which);
// Clear any other checked items.
mCheckedState.clear();
isChecked = true;
mCheckedState.put(row.getFolder(), isChecked);
mDialog.getListView().setItemChecked(which, false);
}
@Override
public void onCancel(DialogInterface dialog) {
mCallback.cancel();
}
}
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