org.gnucash.android.ui.DatePickerDialogFragment.java Source code

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Here is the source code for org.gnucash.android.ui.DatePickerDialogFragment.java

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/*
 * Copyright (c) 2012 Ngewi Fet <ngewif@gmail.com>
 *
 * 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 org.gnucash.android.ui;

import java.util.Calendar;
import java.util.GregorianCalendar;

import android.app.DatePickerDialog;
import android.app.DatePickerDialog.OnDateSetListener;
import android.app.Dialog;
import android.os.Bundle;
import android.support.v4.app.DialogFragment;

/**
 * Fragment for displaying a date picker dialog
 * @author Ngewi Fet <ngewif@gmail.com>
 *
 */
public class DatePickerDialogFragment extends DialogFragment {

    /**
     * Listener to notify of events in the dialog
     */
    private OnDateSetListener mDateSetListener;

    /**
     * Date selected in the dialog or to which the dialog is initialized
     */
    private Calendar mDate;

    /**
     * Default Constructor
     * Is required for when the device is rotated while the dialog is open.
     * If this constructor is not present, the app will crash
     */
    public DatePickerDialogFragment() {
        //nothing to see here, move along
    }

    /**
     * Overloaded constructor
     * @param callback Listener to notify when the date is set and the dialog is closed
     * @param dateMillis Time in milliseconds to which to initialize the dialog
     */
    public DatePickerDialogFragment(OnDateSetListener callback, long dateMillis) {
        mDateSetListener = (OnDateSetListener) callback;
        if (dateMillis > 0) {
            mDate = new GregorianCalendar();
            mDate.setTimeInMillis(dateMillis);
        }
    }

    /**
     * Creates and returns an Android {@link DatePickerDialog}
     */
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        Calendar cal = mDate == null ? Calendar.getInstance() : mDate;

        return new DatePickerDialog(getActivity(), mDateSetListener, cal.get(Calendar.YEAR),
                cal.get(Calendar.MONTH), cal.get(Calendar.DAY_OF_MONTH));
    }

}