Home | History | Annotate | Download | only in widget 
      1 /*
      2  * Copyright (C) 2014 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package android.widget;
     18 
     19 import android.content.Context;
     20 import android.content.res.ColorStateList;
     21 import android.view.View;
     22 import android.view.ViewGroup;
     23 
     24 import java.util.Calendar;
     25 import java.util.HashMap;
     26 
     27 /**
     28  * An adapter for a list of {@link android.widget.SimpleMonthView} items.
     29  */
     30 class SimpleMonthAdapter extends BaseAdapter implements SimpleMonthView.OnDayClickListener {
     31     private static final String TAG = "SimpleMonthAdapter";
     32 
     33     private final Context mContext;
     34     private final DatePickerController mController;
     35     private Calendar mSelectedDay;
     36 
     37     private ColorStateList mCalendarTextColors;
     38 
     39     public SimpleMonthAdapter(Context context, DatePickerController controller) {
     40         mContext = context;
     41         mController = controller;
     42         init();
     43         setSelectedDay(mController.getSelectedDay());
     44     }
     45 
     46     /**
     47      * Updates the selected day and related parameters.
     48      *
     49      * @param day The day to highlight
     50      */
     51     public void setSelectedDay(Calendar day) {
     52         if (mSelectedDay != day) {
     53             mSelectedDay = day;
     54             notifyDataSetChanged();
     55         }
     56     }
     57 
     58     void setCalendarTextColor(ColorStateList colors) {
     59         mCalendarTextColors = colors;
     60     }
     61 
     62     /**
     63      * Set up the gesture detector and selected time
     64      */
     65     protected void init() {
     66         mSelectedDay = Calendar.getInstance();
     67     }
     68 
     69     @Override
     70     public int getCount() {
     71         final int diffYear = mController.getMaxYear() - mController.getMinYear();
     72         final int diffMonth = 1 + mController.getMaxMonth() - mController.getMinMonth()
     73                 + 12 * diffYear;
     74         return diffMonth;
     75     }
     76 
     77     @Override
     78     public Object getItem(int position) {
     79         return null;
     80     }
     81 
     82     @Override
     83     public long getItemId(int position) {
     84         return position;
     85     }
     86 
     87     @Override
     88     public boolean hasStableIds() {
     89         return true;
     90     }
     91 
     92     @SuppressWarnings("unchecked")
     93     @Override
     94     public View getView(int position, View convertView, ViewGroup parent) {
     95         SimpleMonthView v;
     96         HashMap<String, Integer> drawingParams = null;
     97         if (convertView != null) {
     98             v = (SimpleMonthView) convertView;
     99             // We store the drawing parameters in the view so it can be recycled
    100             drawingParams = (HashMap<String, Integer>) v.getTag();
    101         } else {
    102             v = new SimpleMonthView(mContext);
    103             // Set up the new view
    104             AbsListView.LayoutParams params = new AbsListView.LayoutParams(
    105                     AbsListView.LayoutParams.MATCH_PARENT, AbsListView.LayoutParams.MATCH_PARENT);
    106             v.setLayoutParams(params);
    107             v.setClickable(true);
    108             v.setOnDayClickListener(this);
    109             if (mCalendarTextColors != null) {
    110                 v.setTextColor(mCalendarTextColors);
    111             }
    112         }
    113         if (drawingParams == null) {
    114             drawingParams = new HashMap<String, Integer>();
    115         } else {
    116             drawingParams.clear();
    117         }
    118         final int currentMonth = position + mController.getMinMonth();
    119         final int month = currentMonth % 12;
    120         final int year = currentMonth / 12 + mController.getMinYear();
    121 
    122         int selectedDay = -1;
    123         if (isSelectedDayInMonth(year, month)) {
    124             selectedDay = mSelectedDay.get(Calendar.DAY_OF_MONTH);
    125         }
    126 
    127         // Invokes requestLayout() to ensure that the recycled view is set with the appropriate
    128         // height/number of weeks before being displayed.
    129         v.reuse();
    130 
    131         final int enabledDayRangeStart;
    132         if (mController.getMinMonth() == month && mController.getMinYear() == year) {
    133             enabledDayRangeStart = mController.getMinDay();
    134         } else {
    135             enabledDayRangeStart = 1;
    136         }
    137 
    138         final int enabledDayRangeEnd;
    139         if (mController.getMaxMonth() == month && mController.getMaxYear() == year) {
    140             enabledDayRangeEnd = mController.getMaxDay();
    141         } else {
    142             enabledDayRangeEnd = 31;
    143         }
    144 
    145         v.setMonthParams(selectedDay, month, year, mController.getFirstDayOfWeek(),
    146                 enabledDayRangeStart, enabledDayRangeEnd);
    147         v.invalidate();
    148 
    149         return v;
    150     }
    151 
    152     private boolean isSelectedDayInMonth(int year, int month) {
    153         return mSelectedDay.get(Calendar.YEAR) == year && mSelectedDay.get(Calendar.MONTH) == month;
    154     }
    155 
    156     @Override
    157     public void onDayClick(SimpleMonthView view, Calendar day) {
    158         if (day != null) {
    159             onDayTapped(day);
    160         }
    161     }
    162 
    163     /**
    164      * Maintains the same hour/min/sec but moves the day to the tapped day.
    165      *
    166      * @param day The day that was tapped
    167      */
    168     protected void onDayTapped(Calendar day) {
    169         mController.tryVibrate();
    170         mController.onDayOfMonthSelected(day.get(Calendar.YEAR), day.get(Calendar.MONTH),
    171                 day.get(Calendar.DAY_OF_MONTH));
    172         setSelectedDay(day);
    173     }
    174 }
    175