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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.mail.browse;
import android.app.AlertDialog;
import android.app.Dialog;
import android.app.DialogFragment;
import android.app.FragmentManager;
import android.content.DialogInterface;
import android.os.Bundle;
import com.android.mail.R;
import com.android.mail.ui.ControllableActivity;
import com.android.mail.ui.ConversationUpdater;
/**
* A dialog which is also a fragment. This dialog shows a message, two buttons (ok/cancel), and runs
* a listener only for the positive action (ok). Since this is a fragment, it is created
* automatically over orientation changes. To make a listener that works with this dialog, create a
* listener with {@link ConversationUpdater#makeDialogListener(int, boolean)}, which correctly
* handles activity life-cycle events.
*/
public class ConfirmDialogFragment extends DialogFragment {
/** Tag for saving the message shown in the dialog. */
private static final String MESSAGE_KEY = "message";
/** Tag for the dialog in the fragment manager. */
private static final String DIALOG_TAG = "confirm-dialog";
/**
* Since the fragment can be easily destroyed, get the listener from the central activity
* immediately after the positive button ("OK" in English) is clicked. We cannot get the
* listener in {@link #onActivityCreated(Bundle)} because the controller has not had a chance
* to create the listener yet.
*/
private final AlertDialog.OnClickListener POSITIVE_ACTION = new AlertDialog.OnClickListener() {
@Override
public void onClick(DialogInterface arg0, int arg1) {
// Casting to ControllableActivity will crash if it fails. This is the expected
// behavior, since the cast should always succeed. Cast failures only occur during
// development.
final AlertDialog.OnClickListener listener =
((ControllableActivity) getActivity()).getConversationUpdater().getListener();
if (listener != null) {
listener.onClick(arg0, arg1);
}
}
};
/**
* Needs a public empty constructor for instantiation on orientation changes.
*/
public ConfirmDialogFragment() {}
/**
* Create a new {@link ConfirmDialogFragment}.
* @param message
* @return new {@link ConfirmDialogFragment} object.
*/
public static ConfirmDialogFragment newInstance(CharSequence message) {
final ConfirmDialogFragment f = new ConfirmDialogFragment();
final Bundle args = new Bundle();
args.putCharSequence(MESSAGE_KEY, message);
f.setArguments(args);
return f;
}
@Override
public Dialog onCreateDialog(Bundle savedState) {
final AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
final CharSequence message = (getArguments()).getCharSequence(MESSAGE_KEY);
builder.setMessage(message)
.setPositiveButton(R.string.ok, POSITIVE_ACTION)
.setNegativeButton(R.string.cancel, null);
return builder.create();
}
/**
* Display this dialog with the provided fragment manager
* @param manager
*/
public final void displayDialog (FragmentManager manager) {
show(manager, DIALOG_TAG);
}
}
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