DayPickerView.java revision 2e00aa34c051111529290cf23c6ba940c2c0c142
13e9818e0267619fecebd55095ab26c53eff92e93James Kung/* 23e9818e0267619fecebd55095ab26c53eff92e93James Kung * Copyright (C) 2013 The Android Open Source Project 33e9818e0267619fecebd55095ab26c53eff92e93James Kung * 43e9818e0267619fecebd55095ab26c53eff92e93James Kung * Licensed under the Apache License, Version 2.0 (the "License"); 53e9818e0267619fecebd55095ab26c53eff92e93James Kung * you may not use this file except in compliance with the License. 63e9818e0267619fecebd55095ab26c53eff92e93James Kung * You may obtain a copy of the License at 73e9818e0267619fecebd55095ab26c53eff92e93James Kung * 83e9818e0267619fecebd55095ab26c53eff92e93James Kung * http://www.apache.org/licenses/LICENSE-2.0 93e9818e0267619fecebd55095ab26c53eff92e93James Kung * 103e9818e0267619fecebd55095ab26c53eff92e93James Kung * Unless required by applicable law or agreed to in writing, software 113e9818e0267619fecebd55095ab26c53eff92e93James Kung * distributed under the License is distributed on an "AS IS" BASIS, 123e9818e0267619fecebd55095ab26c53eff92e93James Kung * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 133e9818e0267619fecebd55095ab26c53eff92e93James Kung * See the License for the specific language governing permissions and 143e9818e0267619fecebd55095ab26c53eff92e93James Kung * limitations under the License. 153e9818e0267619fecebd55095ab26c53eff92e93James Kung */ 163e9818e0267619fecebd55095ab26c53eff92e93James Kung 173e9818e0267619fecebd55095ab26c53eff92e93James Kungpackage com.android.datetimepicker.date; 183e9818e0267619fecebd55095ab26c53eff92e93James Kung 193e9818e0267619fecebd55095ab26c53eff92e93James Kungimport android.content.Context; 203e9818e0267619fecebd55095ab26c53eff92e93James Kungimport android.os.Handler; 213e9818e0267619fecebd55095ab26c53eff92e93James Kungimport android.util.Log; 223e9818e0267619fecebd55095ab26c53eff92e93James Kungimport android.view.View; 233e9818e0267619fecebd55095ab26c53eff92e93James Kungimport android.view.ViewConfiguration; 243e9818e0267619fecebd55095ab26c53eff92e93James Kungimport android.widget.AbsListView; 253e9818e0267619fecebd55095ab26c53eff92e93James Kungimport android.widget.AbsListView.OnScrollListener; 263e9818e0267619fecebd55095ab26c53eff92e93James Kungimport android.widget.ListView; 273e9818e0267619fecebd55095ab26c53eff92e93James Kung 282e00aa34c051111529290cf23c6ba940c2c0c142James Kungimport com.android.datetimepicker.date.DatePickerDialog.OnDateChangedListener; 293e9818e0267619fecebd55095ab26c53eff92e93James Kungimport com.android.datetimepicker.date.SimpleMonthAdapter.CalendarDay; 303e9818e0267619fecebd55095ab26c53eff92e93James Kung 313e9818e0267619fecebd55095ab26c53eff92e93James Kung/** 323e9818e0267619fecebd55095ab26c53eff92e93James Kung * This displays a list of months in a calendar format with selectable days. 333e9818e0267619fecebd55095ab26c53eff92e93James Kung */ 342e00aa34c051111529290cf23c6ba940c2c0c142James Kungpublic class DayPickerView extends ListView implements OnScrollListener, OnDateChangedListener { 353e9818e0267619fecebd55095ab26c53eff92e93James Kung 363e9818e0267619fecebd55095ab26c53eff92e93James Kung private static final String TAG = "MonthFragment"; 373e9818e0267619fecebd55095ab26c53eff92e93James Kung 383e9818e0267619fecebd55095ab26c53eff92e93James Kung // Affects when the month selection will change while scrolling up 393e9818e0267619fecebd55095ab26c53eff92e93James Kung protected static final int SCROLL_HYST_WEEKS = 2; 403e9818e0267619fecebd55095ab26c53eff92e93James Kung // How long the GoTo fling animation should last 413e9818e0267619fecebd55095ab26c53eff92e93James Kung protected static final int GOTO_SCROLL_DURATION = 250; 423e9818e0267619fecebd55095ab26c53eff92e93James Kung // How long to wait after receiving an onScrollStateChanged notification 433e9818e0267619fecebd55095ab26c53eff92e93James Kung // before acting on it 443e9818e0267619fecebd55095ab26c53eff92e93James Kung protected static final int SCROLL_CHANGE_DELAY = 40; 453e9818e0267619fecebd55095ab26c53eff92e93James Kung // The number of days to display in each week 463e9818e0267619fecebd55095ab26c53eff92e93James Kung public static final int DAYS_PER_WEEK = 7; 473e9818e0267619fecebd55095ab26c53eff92e93James Kung public static int LIST_TOP_OFFSET = -1; // so that the top line will be 483e9818e0267619fecebd55095ab26c53eff92e93James Kung // under the separator 493e9818e0267619fecebd55095ab26c53eff92e93James Kung // You can override these numbers to get a different appearance 503e9818e0267619fecebd55095ab26c53eff92e93James Kung protected int mNumWeeks = 6; 513e9818e0267619fecebd55095ab26c53eff92e93James Kung protected boolean mShowWeekNumber = false; 523e9818e0267619fecebd55095ab26c53eff92e93James Kung protected int mDaysPerWeek = 7; 533e9818e0267619fecebd55095ab26c53eff92e93James Kung 543e9818e0267619fecebd55095ab26c53eff92e93James Kung // These affect the scroll speed and feel 553e9818e0267619fecebd55095ab26c53eff92e93James Kung protected float mFriction = 1.0f; 563e9818e0267619fecebd55095ab26c53eff92e93James Kung 573e9818e0267619fecebd55095ab26c53eff92e93James Kung protected Context mContext; 583e9818e0267619fecebd55095ab26c53eff92e93James Kung protected Handler mHandler; 593e9818e0267619fecebd55095ab26c53eff92e93James Kung 603e9818e0267619fecebd55095ab26c53eff92e93James Kung // highlighted time 613e9818e0267619fecebd55095ab26c53eff92e93James Kung protected CalendarDay mSelectedDay = new CalendarDay(); 623e9818e0267619fecebd55095ab26c53eff92e93James Kung protected SimpleMonthAdapter mAdapter; 633e9818e0267619fecebd55095ab26c53eff92e93James Kung 643e9818e0267619fecebd55095ab26c53eff92e93James Kung protected CalendarDay mTempDay = new CalendarDay(); 653e9818e0267619fecebd55095ab26c53eff92e93James Kung 663e9818e0267619fecebd55095ab26c53eff92e93James Kung private static float mScale = 0; 673e9818e0267619fecebd55095ab26c53eff92e93James Kung // When the week starts; numbered like Time.<WEEKDAY> (e.g. SUNDAY=0). 683e9818e0267619fecebd55095ab26c53eff92e93James Kung protected int mFirstDayOfWeek; 693e9818e0267619fecebd55095ab26c53eff92e93James Kung // The last name announced by accessibility 703e9818e0267619fecebd55095ab26c53eff92e93James Kung protected CharSequence mPrevMonthName; 713e9818e0267619fecebd55095ab26c53eff92e93James Kung // which month should be displayed/highlighted [0-11] 723e9818e0267619fecebd55095ab26c53eff92e93James Kung protected int mCurrentMonthDisplayed; 733e9818e0267619fecebd55095ab26c53eff92e93James Kung // used for tracking during a scroll 743e9818e0267619fecebd55095ab26c53eff92e93James Kung protected long mPreviousScrollPosition; 753e9818e0267619fecebd55095ab26c53eff92e93James Kung // used for tracking what state listview is in 763e9818e0267619fecebd55095ab26c53eff92e93James Kung protected int mPreviousScrollState = OnScrollListener.SCROLL_STATE_IDLE; 773e9818e0267619fecebd55095ab26c53eff92e93James Kung // used for tracking what state listview is in 783e9818e0267619fecebd55095ab26c53eff92e93James Kung protected int mCurrentScrollState = OnScrollListener.SCROLL_STATE_IDLE; 793e9818e0267619fecebd55095ab26c53eff92e93James Kung 803e9818e0267619fecebd55095ab26c53eff92e93James Kung private final DatePickerController mController; 813e9818e0267619fecebd55095ab26c53eff92e93James Kung 823e9818e0267619fecebd55095ab26c53eff92e93James Kung public DayPickerView(Context context, DatePickerController controller) { 833e9818e0267619fecebd55095ab26c53eff92e93James Kung super(context); 843e9818e0267619fecebd55095ab26c53eff92e93James Kung mHandler = new Handler(); 853e9818e0267619fecebd55095ab26c53eff92e93James Kung mController = controller; 862e00aa34c051111529290cf23c6ba940c2c0c142James Kung mController.registerOnDateChangedListener(this); 873e9818e0267619fecebd55095ab26c53eff92e93James Kung setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT)); 883e9818e0267619fecebd55095ab26c53eff92e93James Kung setDrawSelectorOnTop(false); 893e9818e0267619fecebd55095ab26c53eff92e93James Kung init(context); 902e00aa34c051111529290cf23c6ba940c2c0c142James Kung onDateChanged(); 913e9818e0267619fecebd55095ab26c53eff92e93James Kung } 923e9818e0267619fecebd55095ab26c53eff92e93James Kung 933e9818e0267619fecebd55095ab26c53eff92e93James Kung public void init(Context context) { 943e9818e0267619fecebd55095ab26c53eff92e93James Kung mContext = context; 953e9818e0267619fecebd55095ab26c53eff92e93James Kung setUpListView(); 963e9818e0267619fecebd55095ab26c53eff92e93James Kung setUpAdapter(); 973e9818e0267619fecebd55095ab26c53eff92e93James Kung setAdapter(mAdapter); 983e9818e0267619fecebd55095ab26c53eff92e93James Kung } 993e9818e0267619fecebd55095ab26c53eff92e93James Kung 1003e9818e0267619fecebd55095ab26c53eff92e93James Kung public void onChange() { 1013e9818e0267619fecebd55095ab26c53eff92e93James Kung setUpAdapter(); 1023e9818e0267619fecebd55095ab26c53eff92e93James Kung setAdapter(mAdapter); 1033e9818e0267619fecebd55095ab26c53eff92e93James Kung } 1043e9818e0267619fecebd55095ab26c53eff92e93James Kung 1053e9818e0267619fecebd55095ab26c53eff92e93James Kung /** 1063e9818e0267619fecebd55095ab26c53eff92e93James Kung * Creates a new adapter if necessary and sets up its parameters. Override 1073e9818e0267619fecebd55095ab26c53eff92e93James Kung * this method to provide a custom adapter. 1083e9818e0267619fecebd55095ab26c53eff92e93James Kung */ 1093e9818e0267619fecebd55095ab26c53eff92e93James Kung protected void setUpAdapter() { 1103e9818e0267619fecebd55095ab26c53eff92e93James Kung if (mAdapter == null) { 1113e9818e0267619fecebd55095ab26c53eff92e93James Kung mAdapter = new SimpleMonthAdapter(getContext(), mController); 1123e9818e0267619fecebd55095ab26c53eff92e93James Kung } else { 1133e9818e0267619fecebd55095ab26c53eff92e93James Kung mAdapter.setSelectedDay(mSelectedDay); 1143e9818e0267619fecebd55095ab26c53eff92e93James Kung mAdapter.notifyDataSetChanged(); 1153e9818e0267619fecebd55095ab26c53eff92e93James Kung } 1163e9818e0267619fecebd55095ab26c53eff92e93James Kung // refresh the view with the new parameters 1173e9818e0267619fecebd55095ab26c53eff92e93James Kung mAdapter.notifyDataSetChanged(); 1183e9818e0267619fecebd55095ab26c53eff92e93James Kung } 1193e9818e0267619fecebd55095ab26c53eff92e93James Kung 1203e9818e0267619fecebd55095ab26c53eff92e93James Kung /* 1213e9818e0267619fecebd55095ab26c53eff92e93James Kung * Sets all the required fields for the list view. Override this method to 1223e9818e0267619fecebd55095ab26c53eff92e93James Kung * set a different list view behavior. 1233e9818e0267619fecebd55095ab26c53eff92e93James Kung */ 1243e9818e0267619fecebd55095ab26c53eff92e93James Kung protected void setUpListView() { 1253e9818e0267619fecebd55095ab26c53eff92e93James Kung // Transparent background on scroll 1263e9818e0267619fecebd55095ab26c53eff92e93James Kung setCacheColorHint(0); 1273e9818e0267619fecebd55095ab26c53eff92e93James Kung // No dividers 1283e9818e0267619fecebd55095ab26c53eff92e93James Kung setDivider(null); 1293e9818e0267619fecebd55095ab26c53eff92e93James Kung // Items are clickable 1303e9818e0267619fecebd55095ab26c53eff92e93James Kung setItemsCanFocus(true); 1313e9818e0267619fecebd55095ab26c53eff92e93James Kung // The thumb gets in the way, so disable it 1323e9818e0267619fecebd55095ab26c53eff92e93James Kung setFastScrollEnabled(false); 1333e9818e0267619fecebd55095ab26c53eff92e93James Kung setVerticalScrollBarEnabled(false); 1343e9818e0267619fecebd55095ab26c53eff92e93James Kung setOnScrollListener(this); 1353e9818e0267619fecebd55095ab26c53eff92e93James Kung setFadingEdgeLength(0); 1363e9818e0267619fecebd55095ab26c53eff92e93James Kung // Make the scrolling behavior nicer 1373e9818e0267619fecebd55095ab26c53eff92e93James Kung setFriction(ViewConfiguration.getScrollFriction() * mFriction); 1383e9818e0267619fecebd55095ab26c53eff92e93James Kung } 1393e9818e0267619fecebd55095ab26c53eff92e93James Kung 1403e9818e0267619fecebd55095ab26c53eff92e93James Kung /** 1413e9818e0267619fecebd55095ab26c53eff92e93James Kung * This moves to the specified time in the view. If the time is not already 1423e9818e0267619fecebd55095ab26c53eff92e93James Kung * in range it will move the list so that the first of the month containing 1433e9818e0267619fecebd55095ab26c53eff92e93James Kung * the time is at the top of the view. If the new time is already in view 1443e9818e0267619fecebd55095ab26c53eff92e93James Kung * the list will not be scrolled unless forceScroll is true. This time may 1453e9818e0267619fecebd55095ab26c53eff92e93James Kung * optionally be highlighted as selected as well. 1463e9818e0267619fecebd55095ab26c53eff92e93James Kung * 1473e9818e0267619fecebd55095ab26c53eff92e93James Kung * @param time The time to move to 1483e9818e0267619fecebd55095ab26c53eff92e93James Kung * @param animate Whether to scroll to the given time or just redraw at the 1493e9818e0267619fecebd55095ab26c53eff92e93James Kung * new location 1503e9818e0267619fecebd55095ab26c53eff92e93James Kung * @param setSelected Whether to set the given time as selected 1513e9818e0267619fecebd55095ab26c53eff92e93James Kung * @param forceScroll Whether to recenter even if the time is already 1523e9818e0267619fecebd55095ab26c53eff92e93James Kung * visible 1533e9818e0267619fecebd55095ab26c53eff92e93James Kung * @return Whether or not the view animated to the new location 1543e9818e0267619fecebd55095ab26c53eff92e93James Kung */ 1553e9818e0267619fecebd55095ab26c53eff92e93James Kung public boolean goTo(CalendarDay day, boolean animate, boolean setSelected, boolean forceScroll) { 1563e9818e0267619fecebd55095ab26c53eff92e93James Kung 1573e9818e0267619fecebd55095ab26c53eff92e93James Kung // Set the selected day 1583e9818e0267619fecebd55095ab26c53eff92e93James Kung if (setSelected) { 1593e9818e0267619fecebd55095ab26c53eff92e93James Kung mSelectedDay.set(day); 1603e9818e0267619fecebd55095ab26c53eff92e93James Kung } 1613e9818e0267619fecebd55095ab26c53eff92e93James Kung 1623e9818e0267619fecebd55095ab26c53eff92e93James Kung mTempDay.set(day); 1632e00aa34c051111529290cf23c6ba940c2c0c142James Kung final int position = (day.year - mController.getMinYear()) 1643e9818e0267619fecebd55095ab26c53eff92e93James Kung * SimpleMonthAdapter.MONTHS_IN_YEAR + day.month; 1652e00aa34c051111529290cf23c6ba940c2c0c142James Kung Log.d(TAG, "Year: " + day.year); 1663e9818e0267619fecebd55095ab26c53eff92e93James Kung 1673e9818e0267619fecebd55095ab26c53eff92e93James Kung View child; 1683e9818e0267619fecebd55095ab26c53eff92e93James Kung int i = 0; 1693e9818e0267619fecebd55095ab26c53eff92e93James Kung int top = 0; 1703e9818e0267619fecebd55095ab26c53eff92e93James Kung // Find a child that's completely in the view 1713e9818e0267619fecebd55095ab26c53eff92e93James Kung do { 1723e9818e0267619fecebd55095ab26c53eff92e93James Kung child = getChildAt(i++); 1733e9818e0267619fecebd55095ab26c53eff92e93James Kung if (child == null) { 1743e9818e0267619fecebd55095ab26c53eff92e93James Kung break; 1753e9818e0267619fecebd55095ab26c53eff92e93James Kung } 1763e9818e0267619fecebd55095ab26c53eff92e93James Kung top = child.getTop(); 1773e9818e0267619fecebd55095ab26c53eff92e93James Kung if (Log.isLoggable(TAG, Log.DEBUG)) { 1783e9818e0267619fecebd55095ab26c53eff92e93James Kung Log.d(TAG, "child at " + (i - 1) + " has top " + top); 1793e9818e0267619fecebd55095ab26c53eff92e93James Kung } 1803e9818e0267619fecebd55095ab26c53eff92e93James Kung } while (top < 0); 1813e9818e0267619fecebd55095ab26c53eff92e93James Kung 1823e9818e0267619fecebd55095ab26c53eff92e93James Kung // Compute the first and last position visible 1833e9818e0267619fecebd55095ab26c53eff92e93James Kung int selectedPosition; 1843e9818e0267619fecebd55095ab26c53eff92e93James Kung if (child != null) { 1853e9818e0267619fecebd55095ab26c53eff92e93James Kung selectedPosition = getPositionForView(child); 1863e9818e0267619fecebd55095ab26c53eff92e93James Kung } else { 1873e9818e0267619fecebd55095ab26c53eff92e93James Kung selectedPosition = 0; 1883e9818e0267619fecebd55095ab26c53eff92e93James Kung } 1893e9818e0267619fecebd55095ab26c53eff92e93James Kung 1903e9818e0267619fecebd55095ab26c53eff92e93James Kung if (setSelected) { 1913e9818e0267619fecebd55095ab26c53eff92e93James Kung mAdapter.setSelectedDay(mSelectedDay); 1923e9818e0267619fecebd55095ab26c53eff92e93James Kung } 1933e9818e0267619fecebd55095ab26c53eff92e93James Kung 1943e9818e0267619fecebd55095ab26c53eff92e93James Kung if (Log.isLoggable(TAG, Log.DEBUG)) { 1953e9818e0267619fecebd55095ab26c53eff92e93James Kung Log.d(TAG, "GoTo position " + position); 1963e9818e0267619fecebd55095ab26c53eff92e93James Kung } 1973e9818e0267619fecebd55095ab26c53eff92e93James Kung // Check if the selected day is now outside of our visible range 1983e9818e0267619fecebd55095ab26c53eff92e93James Kung // and if so scroll to the month that contains it 1993e9818e0267619fecebd55095ab26c53eff92e93James Kung if (position != selectedPosition || forceScroll) { 2003e9818e0267619fecebd55095ab26c53eff92e93James Kung setMonthDisplayed(mTempDay); 2013e9818e0267619fecebd55095ab26c53eff92e93James Kung mPreviousScrollState = OnScrollListener.SCROLL_STATE_FLING; 2023e9818e0267619fecebd55095ab26c53eff92e93James Kung if (animate) { 2033e9818e0267619fecebd55095ab26c53eff92e93James Kung smoothScrollToPositionFromTop( 2043e9818e0267619fecebd55095ab26c53eff92e93James Kung position, LIST_TOP_OFFSET, GOTO_SCROLL_DURATION); 2053e9818e0267619fecebd55095ab26c53eff92e93James Kung return true; 2063e9818e0267619fecebd55095ab26c53eff92e93James Kung } else { 2072e00aa34c051111529290cf23c6ba940c2c0c142James Kung postSetSelection(position); 2083e9818e0267619fecebd55095ab26c53eff92e93James Kung } 2093e9818e0267619fecebd55095ab26c53eff92e93James Kung } else if (setSelected) { 2103e9818e0267619fecebd55095ab26c53eff92e93James Kung setMonthDisplayed(mSelectedDay); 2113e9818e0267619fecebd55095ab26c53eff92e93James Kung } 2123e9818e0267619fecebd55095ab26c53eff92e93James Kung return false; 2133e9818e0267619fecebd55095ab26c53eff92e93James Kung } 2143e9818e0267619fecebd55095ab26c53eff92e93James Kung 2152e00aa34c051111529290cf23c6ba940c2c0c142James Kung public void postSetSelection(final int position) { 2162e00aa34c051111529290cf23c6ba940c2c0c142James Kung clearFocus(); 2172e00aa34c051111529290cf23c6ba940c2c0c142James Kung post(new Runnable() { 2182e00aa34c051111529290cf23c6ba940c2c0c142James Kung 2192e00aa34c051111529290cf23c6ba940c2c0c142James Kung @Override 2202e00aa34c051111529290cf23c6ba940c2c0c142James Kung public void run() { 2212e00aa34c051111529290cf23c6ba940c2c0c142James Kung setSelection(position); 2222e00aa34c051111529290cf23c6ba940c2c0c142James Kung } 2232e00aa34c051111529290cf23c6ba940c2c0c142James Kung }); 2242e00aa34c051111529290cf23c6ba940c2c0c142James Kung onScrollStateChanged(this, OnScrollListener.SCROLL_STATE_IDLE); 2252e00aa34c051111529290cf23c6ba940c2c0c142James Kung } 2262e00aa34c051111529290cf23c6ba940c2c0c142James Kung 2273e9818e0267619fecebd55095ab26c53eff92e93James Kung /** 2283e9818e0267619fecebd55095ab26c53eff92e93James Kung * Updates the title and selected month if the view has moved to a new 2293e9818e0267619fecebd55095ab26c53eff92e93James Kung * month. 2303e9818e0267619fecebd55095ab26c53eff92e93James Kung */ 2313e9818e0267619fecebd55095ab26c53eff92e93James Kung @Override 2323e9818e0267619fecebd55095ab26c53eff92e93James Kung public void onScroll( 2333e9818e0267619fecebd55095ab26c53eff92e93James Kung AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) { 2343e9818e0267619fecebd55095ab26c53eff92e93James Kung SimpleMonthView child = (SimpleMonthView) view.getChildAt(0); 2353e9818e0267619fecebd55095ab26c53eff92e93James Kung if (child == null) { 2363e9818e0267619fecebd55095ab26c53eff92e93James Kung return; 2373e9818e0267619fecebd55095ab26c53eff92e93James Kung } 2383e9818e0267619fecebd55095ab26c53eff92e93James Kung 2393e9818e0267619fecebd55095ab26c53eff92e93James Kung // Figure out where we are 2403e9818e0267619fecebd55095ab26c53eff92e93James Kung long currScroll = view.getFirstVisiblePosition() * child.getHeight() - child.getBottom(); 2413e9818e0267619fecebd55095ab26c53eff92e93James Kung mPreviousScrollPosition = currScroll; 2423e9818e0267619fecebd55095ab26c53eff92e93James Kung mPreviousScrollState = mCurrentScrollState; 2433e9818e0267619fecebd55095ab26c53eff92e93James Kung } 2443e9818e0267619fecebd55095ab26c53eff92e93James Kung 2453e9818e0267619fecebd55095ab26c53eff92e93James Kung /** 2463e9818e0267619fecebd55095ab26c53eff92e93James Kung * Sets the month displayed at the top of this view based on time. Override 2473e9818e0267619fecebd55095ab26c53eff92e93James Kung * to add custom events when the title is changed. 2483e9818e0267619fecebd55095ab26c53eff92e93James Kung */ 2493e9818e0267619fecebd55095ab26c53eff92e93James Kung protected void setMonthDisplayed(CalendarDay date) { 2503e9818e0267619fecebd55095ab26c53eff92e93James Kung mCurrentMonthDisplayed = date.month; 2513e9818e0267619fecebd55095ab26c53eff92e93James Kung invalidateViews(); 2523e9818e0267619fecebd55095ab26c53eff92e93James Kung } 2533e9818e0267619fecebd55095ab26c53eff92e93James Kung 2543e9818e0267619fecebd55095ab26c53eff92e93James Kung @Override 2553e9818e0267619fecebd55095ab26c53eff92e93James Kung public void onScrollStateChanged(AbsListView view, int scrollState) { 2563e9818e0267619fecebd55095ab26c53eff92e93James Kung // use a post to prevent re-entering onScrollStateChanged before it 2573e9818e0267619fecebd55095ab26c53eff92e93James Kung // exits 2583e9818e0267619fecebd55095ab26c53eff92e93James Kung mScrollStateChangedRunnable.doScrollStateChange(view, scrollState); 2593e9818e0267619fecebd55095ab26c53eff92e93James Kung } 2603e9818e0267619fecebd55095ab26c53eff92e93James Kung 2613e9818e0267619fecebd55095ab26c53eff92e93James Kung protected ScrollStateRunnable mScrollStateChangedRunnable = new ScrollStateRunnable(); 2623e9818e0267619fecebd55095ab26c53eff92e93James Kung 2633e9818e0267619fecebd55095ab26c53eff92e93James Kung protected class ScrollStateRunnable implements Runnable { 2643e9818e0267619fecebd55095ab26c53eff92e93James Kung private int mNewState; 2653e9818e0267619fecebd55095ab26c53eff92e93James Kung 2663e9818e0267619fecebd55095ab26c53eff92e93James Kung /** 2673e9818e0267619fecebd55095ab26c53eff92e93James Kung * Sets up the runnable with a short delay in case the scroll state 2683e9818e0267619fecebd55095ab26c53eff92e93James Kung * immediately changes again. 2693e9818e0267619fecebd55095ab26c53eff92e93James Kung * 2703e9818e0267619fecebd55095ab26c53eff92e93James Kung * @param view The list view that changed state 2713e9818e0267619fecebd55095ab26c53eff92e93James Kung * @param scrollState The new state it changed to 2723e9818e0267619fecebd55095ab26c53eff92e93James Kung */ 2733e9818e0267619fecebd55095ab26c53eff92e93James Kung public void doScrollStateChange(AbsListView view, int scrollState) { 2743e9818e0267619fecebd55095ab26c53eff92e93James Kung mHandler.removeCallbacks(this); 2753e9818e0267619fecebd55095ab26c53eff92e93James Kung mNewState = scrollState; 2763e9818e0267619fecebd55095ab26c53eff92e93James Kung mHandler.postDelayed(this, SCROLL_CHANGE_DELAY); 2773e9818e0267619fecebd55095ab26c53eff92e93James Kung } 2783e9818e0267619fecebd55095ab26c53eff92e93James Kung 2793e9818e0267619fecebd55095ab26c53eff92e93James Kung @Override 2803e9818e0267619fecebd55095ab26c53eff92e93James Kung public void run() { 2813e9818e0267619fecebd55095ab26c53eff92e93James Kung mCurrentScrollState = mNewState; 2823e9818e0267619fecebd55095ab26c53eff92e93James Kung if (Log.isLoggable(TAG, Log.DEBUG)) { 2833e9818e0267619fecebd55095ab26c53eff92e93James Kung Log.d(TAG, 2843e9818e0267619fecebd55095ab26c53eff92e93James Kung "new scroll state: " + mNewState + " old state: " + mPreviousScrollState); 2853e9818e0267619fecebd55095ab26c53eff92e93James Kung } 2863e9818e0267619fecebd55095ab26c53eff92e93James Kung // Fix the position after a scroll or a fling ends 2873e9818e0267619fecebd55095ab26c53eff92e93James Kung if (mNewState == OnScrollListener.SCROLL_STATE_IDLE 2883e9818e0267619fecebd55095ab26c53eff92e93James Kung && mPreviousScrollState != OnScrollListener.SCROLL_STATE_IDLE 2893e9818e0267619fecebd55095ab26c53eff92e93James Kung && mPreviousScrollState != OnScrollListener.SCROLL_STATE_TOUCH_SCROLL) { 2903e9818e0267619fecebd55095ab26c53eff92e93James Kung mPreviousScrollState = mNewState; 2913e9818e0267619fecebd55095ab26c53eff92e93James Kung int i = 0; 2923e9818e0267619fecebd55095ab26c53eff92e93James Kung View child = getChildAt(i); 2933e9818e0267619fecebd55095ab26c53eff92e93James Kung while (child != null && child.getBottom() <= 0) { 2943e9818e0267619fecebd55095ab26c53eff92e93James Kung child = getChildAt(++i); 2953e9818e0267619fecebd55095ab26c53eff92e93James Kung } 2963e9818e0267619fecebd55095ab26c53eff92e93James Kung if (child == null) { 2973e9818e0267619fecebd55095ab26c53eff92e93James Kung // The view is no longer visible, just return 2983e9818e0267619fecebd55095ab26c53eff92e93James Kung return; 2993e9818e0267619fecebd55095ab26c53eff92e93James Kung } 3003e9818e0267619fecebd55095ab26c53eff92e93James Kung int firstPosition = getFirstVisiblePosition(); 3013e9818e0267619fecebd55095ab26c53eff92e93James Kung int lastPosition = getLastVisiblePosition(); 3023e9818e0267619fecebd55095ab26c53eff92e93James Kung boolean scroll = firstPosition != 0 && lastPosition != getCount() - 1; 3033e9818e0267619fecebd55095ab26c53eff92e93James Kung final int top = child.getTop(); 3043e9818e0267619fecebd55095ab26c53eff92e93James Kung final int bottom = child.getBottom(); 3053e9818e0267619fecebd55095ab26c53eff92e93James Kung final int midpoint = getHeight() / 2; 3063e9818e0267619fecebd55095ab26c53eff92e93James Kung if (scroll && top < LIST_TOP_OFFSET) { 3073e9818e0267619fecebd55095ab26c53eff92e93James Kung if (bottom > midpoint) { 3083e9818e0267619fecebd55095ab26c53eff92e93James Kung smoothScrollBy(top, GOTO_SCROLL_DURATION); 3093e9818e0267619fecebd55095ab26c53eff92e93James Kung } else { 3103e9818e0267619fecebd55095ab26c53eff92e93James Kung smoothScrollBy(bottom, GOTO_SCROLL_DURATION); 3113e9818e0267619fecebd55095ab26c53eff92e93James Kung } 3123e9818e0267619fecebd55095ab26c53eff92e93James Kung } 3133e9818e0267619fecebd55095ab26c53eff92e93James Kung } else { 3143e9818e0267619fecebd55095ab26c53eff92e93James Kung mPreviousScrollState = mNewState; 3153e9818e0267619fecebd55095ab26c53eff92e93James Kung } 3163e9818e0267619fecebd55095ab26c53eff92e93James Kung } 3173e9818e0267619fecebd55095ab26c53eff92e93James Kung } 3182e00aa34c051111529290cf23c6ba940c2c0c142James Kung 3192e00aa34c051111529290cf23c6ba940c2c0c142James Kung /** 3202e00aa34c051111529290cf23c6ba940c2c0c142James Kung * Gets the position of the view that is most prominently displayed within the list view. 3212e00aa34c051111529290cf23c6ba940c2c0c142James Kung */ 3222e00aa34c051111529290cf23c6ba940c2c0c142James Kung public int getMostVisiblePosition() { 3232e00aa34c051111529290cf23c6ba940c2c0c142James Kung final int firstPosition = getFirstVisiblePosition(); 3242e00aa34c051111529290cf23c6ba940c2c0c142James Kung final int height = getHeight(); 3252e00aa34c051111529290cf23c6ba940c2c0c142James Kung 3262e00aa34c051111529290cf23c6ba940c2c0c142James Kung int maxDisplayedHeight = 0; 3272e00aa34c051111529290cf23c6ba940c2c0c142James Kung int mostVisibleIndex = 0; 3282e00aa34c051111529290cf23c6ba940c2c0c142James Kung int i=0; 3292e00aa34c051111529290cf23c6ba940c2c0c142James Kung int bottom = 0; 3302e00aa34c051111529290cf23c6ba940c2c0c142James Kung while (bottom < height) { 3312e00aa34c051111529290cf23c6ba940c2c0c142James Kung View child = getChildAt(i); 3322e00aa34c051111529290cf23c6ba940c2c0c142James Kung if (child == null) { 3332e00aa34c051111529290cf23c6ba940c2c0c142James Kung break; 3342e00aa34c051111529290cf23c6ba940c2c0c142James Kung } 3352e00aa34c051111529290cf23c6ba940c2c0c142James Kung bottom = child.getBottom(); 3362e00aa34c051111529290cf23c6ba940c2c0c142James Kung int displayedHeight = Math.min(bottom, height) - Math.max(0, child.getTop()); 3372e00aa34c051111529290cf23c6ba940c2c0c142James Kung if (displayedHeight > maxDisplayedHeight) { 3382e00aa34c051111529290cf23c6ba940c2c0c142James Kung mostVisibleIndex = i; 3392e00aa34c051111529290cf23c6ba940c2c0c142James Kung maxDisplayedHeight = displayedHeight; 3402e00aa34c051111529290cf23c6ba940c2c0c142James Kung } 3412e00aa34c051111529290cf23c6ba940c2c0c142James Kung i++; 3422e00aa34c051111529290cf23c6ba940c2c0c142James Kung } 3432e00aa34c051111529290cf23c6ba940c2c0c142James Kung return firstPosition + mostVisibleIndex; 3442e00aa34c051111529290cf23c6ba940c2c0c142James Kung } 3452e00aa34c051111529290cf23c6ba940c2c0c142James Kung 3462e00aa34c051111529290cf23c6ba940c2c0c142James Kung @Override 3472e00aa34c051111529290cf23c6ba940c2c0c142James Kung public void onDateChanged() { 3482e00aa34c051111529290cf23c6ba940c2c0c142James Kung goTo(mController.getSelectedDay(), false, true, true); 3492e00aa34c051111529290cf23c6ba940c2c0c142James Kung } 3503e9818e0267619fecebd55095ab26c53eff92e93James Kung} 351