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      1 // Copyright 2013 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 package org.chromium.ui.picker;
      6 
      7 import android.app.AlertDialog;
      8 import android.content.Context;
      9 import android.content.DialogInterface;
     10 import android.content.DialogInterface.OnClickListener;
     11 
     12 import org.chromium.ui.R;
     13 import org.chromium.ui.picker.TwoFieldDatePicker.OnMonthOrWeekChangedListener;
     14 
     15 public abstract class TwoFieldDatePickerDialog extends AlertDialog implements OnClickListener,
     16         OnMonthOrWeekChangedListener {
     17 
     18     private static final String YEAR = "year";
     19     private static final String POSITION_IN_YEAR = "position_in_year";
     20 
     21     protected final TwoFieldDatePicker mPicker;
     22     protected final OnValueSetListener mCallBack;
     23 
     24     /**
     25      * The callback used to indicate the user is done filling in the date.
     26      */
     27     public interface OnValueSetListener {
     28 
     29         /**
     30          * @param year The year that was set.
     31          * @param positionInYear The position in the year that was set.
     32          */
     33         void onValueSet(int year, int positionInYear);
     34     }
     35 
     36     /**
     37      * @param context The context the dialog is to run in.
     38      * @param callBack How the parent is notified that the date is set.
     39      * @param year The initial year of the dialog.
     40      * @param weekOfYear The initial week of the dialog.
     41      */
     42     public TwoFieldDatePickerDialog(Context context,
     43              OnValueSetListener callBack,
     44             int year,
     45             int positionInYear,
     46             double minValue,
     47             double maxValue) {
     48         this(context, 0, callBack, year, positionInYear, minValue, maxValue);
     49     }
     50 
     51     /**
     52      * @param context The context the dialog is to run in.
     53      * @param theme the theme to apply to this dialog
     54      * @param callBack How the parent is notified that the date is set.
     55      * @param year The initial year of the dialog.
     56      * @param weekOfYear The initial week of the dialog.
     57      */
     58     public TwoFieldDatePickerDialog(Context context,
     59             int theme,
     60              OnValueSetListener callBack,
     61             int year,
     62             int positionInYear,
     63             double minValue,
     64             double maxValue) {
     65         super(context, theme);
     66 
     67         mCallBack = callBack;
     68 
     69         setButton(BUTTON_POSITIVE, context.getText(
     70                 R.string.date_picker_dialog_set), this);
     71         setButton(BUTTON_NEGATIVE, context.getText(android.R.string.cancel),
     72                 (OnClickListener) null);
     73         setIcon(0);
     74 
     75         mPicker = createPicker(context, minValue, maxValue);
     76         setView(mPicker);
     77         mPicker.init(year, positionInYear, this);
     78     }
     79 
     80     protected TwoFieldDatePicker createPicker(Context context, double minValue, double maxValue) {
     81         return null;
     82     }
     83 
     84     @Override
     85     public void onClick(DialogInterface dialog, int which) {
     86         tryNotifyDateSet();
     87     }
     88 
     89     /**
     90      * Notifies the listener, if such, that a date has been set.
     91      */
     92     protected void tryNotifyDateSet() {
     93         if (mCallBack != null) {
     94             mPicker.clearFocus();
     95             mCallBack.onValueSet(mPicker.getYear(), mPicker.getPositionInYear());
     96         }
     97     }
     98 
     99     @Override
    100     public void onMonthOrWeekChanged(TwoFieldDatePicker view, int year, int positionInYear) {
    101         mPicker.init(year, positionInYear, null);
    102     }
    103 
    104     /**
    105      * Sets the current date.
    106      *
    107      * @param year The date week year.
    108      * @param weekOfYear The date week.
    109      */
    110     public void updateDate(int year, int weekOfYear) {
    111         mPicker.updateDate(year, weekOfYear);
    112     }
    113 }
    114