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/*
* Copyright (C) 2007 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 android.app;
import android.content.Context;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.os.Bundle;
import android.text.format.DateUtils;
import android.util.TypedValue;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.Button;
import android.widget.DatePicker;
import android.widget.DatePicker.OnDateChangedListener;
import android.widget.DatePicker.ValidationCallback;
import com.android.internal.R;
import java.util.Calendar;
/**
* A simple dialog containing an {@link android.widget.DatePicker}.
*
* <p>See the <a href="{@docRoot}guide/topics/ui/controls/pickers.html">Pickers</a>
* guide.</p>
*/
public class DatePickerDialog extends AlertDialog implements OnClickListener,
OnDateChangedListener {
private static final String YEAR = "year";
private static final String MONTH = "month";
private static final String DAY = "day";
private final DatePicker mDatePicker;
private final OnDateSetListener mDateSetListener;
private final Calendar mCalendar;
private boolean mTitleNeedsUpdate = true;
/**
* The callback used to indicate the user is done filling in the date.
*/
public interface OnDateSetListener {
/**
* @param view The view associated with this listener.
* @param year The year that was set.
* @param monthOfYear The month that was set (0-11) for compatibility
* with {@link java.util.Calendar}.
* @param dayOfMonth The day of the month that was set.
*/
void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth);
}
/**
* @param context The context the dialog is to run in.
* @param callBack How the parent is notified that the date is set.
* @param year The initial year of the dialog.
* @param monthOfYear The initial month of the dialog.
* @param dayOfMonth The initial day of the dialog.
*/
public DatePickerDialog(Context context,
OnDateSetListener callBack,
int year,
int monthOfYear,
int dayOfMonth) {
this(context, 0, callBack, year, monthOfYear, dayOfMonth);
}
static int resolveDialogTheme(Context context, int resid) {
if (resid == 0) {
final TypedValue outValue = new TypedValue();
context.getTheme().resolveAttribute(R.attr.datePickerDialogTheme, outValue, true);
return outValue.resourceId;
} else {
return resid;
}
}
/**
* @param context The context the dialog is to run in.
* @param theme the theme to apply to this dialog
* @param listener How the parent is notified that the date is set.
* @param year The initial year of the dialog.
* @param monthOfYear The initial month of the dialog.
* @param dayOfMonth The initial day of the dialog.
*/
public DatePickerDialog(Context context, int theme, OnDateSetListener listener, int year,
int monthOfYear, int dayOfMonth) {
super(context, resolveDialogTheme(context, theme));
mDateSetListener = listener;
mCalendar = Calendar.getInstance();
final Context themeContext = getContext();
final LayoutInflater inflater = LayoutInflater.from(themeContext);
final View view = inflater.inflate(R.layout.date_picker_dialog, null);
setView(view);
setButton(BUTTON_POSITIVE, themeContext.getString(R.string.ok), this);
setButton(BUTTON_NEGATIVE, themeContext.getString(R.string.cancel), this);
setButtonPanelLayoutHint(LAYOUT_HINT_SIDE);
mDatePicker = (DatePicker) view.findViewById(R.id.datePicker);
mDatePicker.init(year, monthOfYear, dayOfMonth, this);
mDatePicker.setValidationCallback(mValidationCallback);
}
@Override
public void onDateChanged(DatePicker view, int year, int month, int day) {
mDatePicker.init(year, month, day, this);
updateTitle(year, month, day);
}
@Override
public void onClick(DialogInterface dialog, int which) {
switch (which) {
case BUTTON_POSITIVE:
if (mDateSetListener != null) {
// Clearing focus forces the dialog to commit any pending
// changes, e.g. typed text in a NumberPicker.
mDatePicker.clearFocus();
mDateSetListener.onDateSet(mDatePicker, mDatePicker.getYear(),
mDatePicker.getMonth(), mDatePicker.getDayOfMonth());
}
break;
case BUTTON_NEGATIVE:
cancel();
break;
}
}
/**
* Gets the {@link DatePicker} contained in this dialog.
*
* @return The calendar view.
*/
public DatePicker getDatePicker() {
return mDatePicker;
}
/**
* Sets the current date.
*
* @param year The date year.
* @param monthOfYear The date month.
* @param dayOfMonth The date day of month.
*/
public void updateDate(int year, int monthOfYear, int dayOfMonth) {
mDatePicker.updateDate(year, monthOfYear, dayOfMonth);
}
private void updateTitle(int year, int month, int day) {
if (!mDatePicker.getCalendarViewShown()) {
mCalendar.set(Calendar.YEAR, year);
mCalendar.set(Calendar.MONTH, month);
mCalendar.set(Calendar.DAY_OF_MONTH, day);
String title = DateUtils.formatDateTime(mContext,
mCalendar.getTimeInMillis(),
DateUtils.FORMAT_SHOW_DATE
| DateUtils.FORMAT_SHOW_WEEKDAY
| DateUtils.FORMAT_SHOW_YEAR
| DateUtils.FORMAT_ABBREV_MONTH
| DateUtils.FORMAT_ABBREV_WEEKDAY);
setTitle(title);
mTitleNeedsUpdate = true;
} else {
if (mTitleNeedsUpdate) {
mTitleNeedsUpdate = false;
setTitle(R.string.date_picker_dialog_title);
}
}
}
@Override
public Bundle onSaveInstanceState() {
final Bundle state = super.onSaveInstanceState();
state.putInt(YEAR, mDatePicker.getYear());
state.putInt(MONTH, mDatePicker.getMonth());
state.putInt(DAY, mDatePicker.getDayOfMonth());
return state;
}
@Override
public void onRestoreInstanceState(Bundle savedInstanceState) {
super.onRestoreInstanceState(savedInstanceState);
final int year = savedInstanceState.getInt(YEAR);
final int month = savedInstanceState.getInt(MONTH);
final int day = savedInstanceState.getInt(DAY);
mDatePicker.init(year, month, day, this);
}
private final ValidationCallback mValidationCallback = new ValidationCallback() {
@Override
public void onValidationChanged(boolean valid) {
final Button positive = getButton(BUTTON_POSITIVE);
if (positive != null) {
positive.setEnabled(valid);
}
}
};
}
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