1 /* 2 * Copyright (C) 2007 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 com.android.calendar; 18 19 import android.content.ContentResolver; 20 import android.content.ContentUris; 21 import android.content.ContentValues; 22 import android.content.Context; 23 import android.database.Cursor; 24 import android.graphics.drawable.Drawable; 25 import android.graphics.drawable.GradientDrawable; 26 import android.net.Uri; 27 import android.provider.Calendar.Calendars; 28 import android.text.TextUtils; 29 import android.view.LayoutInflater; 30 import android.view.View; 31 import android.view.ViewGroup; 32 import android.widget.CheckBox; 33 import android.widget.CompoundButton; 34 import android.widget.CursorAdapter; 35 import android.widget.TextView; 36 37 public class SelectCalendarsAdapter extends CursorAdapter { 38 39 private static final int CLEAR_ALPHA_MASK = 0x00FFFFFF; 40 private static final int HIGH_ALPHA = 255 << 24; 41 private static final int MED_ALPHA = 180 << 24; 42 private static final int LOW_ALPHA = 150 << 24; 43 44 /* The corner should be rounded on the top right and bottom right */ 45 private static final float[] CORNERS = new float[] {0, 0, 5, 5, 5, 5, 0, 0}; 46 47 private static final String TAG = "Calendar"; 48 49 private final LayoutInflater mInflater; 50 private final ContentResolver mResolver; 51 private final ContentValues mValues = new ContentValues(); 52 private Boolean mIsChecked[] = null; 53 private static final Boolean CHECKED = true; 54 private static final Boolean UNCHECKED = false; 55 56 private class CheckBoxListener implements CheckBox.OnCheckedChangeListener { 57 private final long mCalendarId; 58 private final int mPosition; 59 CheckBoxListener(long calendarId, int position)60 private CheckBoxListener(long calendarId, int position) { 61 mPosition = position; 62 mCalendarId = calendarId; 63 } 64 onCheckedChanged(CompoundButton buttonView, boolean isChecked)65 public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { 66 Uri uri = ContentUris.withAppendedId(Calendars.CONTENT_URI, mCalendarId); 67 mValues.clear(); 68 int checked = isChecked ? 1 : 0; 69 mValues.put(Calendars.SELECTED, checked); 70 mResolver.update(uri, mValues, null, null); 71 mIsChecked[mPosition] = isChecked ? CHECKED : UNCHECKED; 72 } 73 } 74 updateIsCheckedArray(int cursorCount)75 private void updateIsCheckedArray(int cursorCount) { 76 mIsChecked = new Boolean[cursorCount]; 77 } 78 SelectCalendarsAdapter(Context context, Cursor cursor)79 public SelectCalendarsAdapter(Context context, Cursor cursor) { 80 super(context, cursor); 81 mInflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); 82 mResolver = context.getContentResolver(); 83 updateIsCheckedArray(cursor.getCount()); 84 } 85 86 @Override newView(Context context, Cursor cursor, ViewGroup parent)87 public View newView(Context context, Cursor cursor, ViewGroup parent) { 88 return mInflater.inflate(R.layout.calendar_item, parent, false); 89 } 90 91 @Override bindView(View view, Context context, Cursor cursor)92 public void bindView(View view, Context context, Cursor cursor) { 93 int idColumn = cursor.getColumnIndexOrThrow(Calendars._ID); 94 int nameColumn = cursor.getColumnIndexOrThrow(Calendars.DISPLAY_NAME); 95 int selectedColumn = cursor.getColumnIndexOrThrow(Calendars.SELECTED); 96 int colorColumn = cursor.getColumnIndexOrThrow(Calendars.COLOR); 97 view.findViewById(R.id.color).setBackgroundDrawable(getColorChip(cursor.getInt(colorColumn))); 98 setText(view, R.id.calendar, cursor.getString(nameColumn)); 99 CheckBox box = (CheckBox) view.findViewById(R.id.checkbox); 100 long id = cursor.getLong(idColumn); 101 102 // Update mIsChecked array is needed 103 int cursorCount = cursor.getCount(); 104 if (cursorCount != mIsChecked.length) { 105 updateIsCheckedArray(cursorCount); 106 } 107 108 // If the value hasn't changed, read from cursor; otherwise, read from mIsChecked array. 109 boolean checked; 110 int position = cursor.getPosition(); 111 if (mIsChecked[position] == null) { 112 checked = cursor.getInt(selectedColumn) != 0; 113 } else { 114 checked = (mIsChecked[position] == CHECKED); 115 } 116 117 box.setOnCheckedChangeListener(null); 118 box.setChecked(checked); 119 box.setOnCheckedChangeListener(new CheckBoxListener(id, position)); 120 } 121 setText(View view, int id, String text)122 private static void setText(View view, int id, String text) { 123 if (TextUtils.isEmpty(text)) { 124 return; 125 } 126 TextView textView = (TextView) view.findViewById(id); 127 textView.setText(text); 128 } 129 getColorChip(int color)130 private Drawable getColorChip(int color) { 131 132 /* 133 * We want the color chip to have a nice gradient using 134 * the color of the calendar. To do this we use a GradientDrawable. 135 * The color supplied has an alpha of FF so we first do: 136 * color & 0x00FFFFFF 137 * to clear the alpha. Then we add our alpha to it. 138 * We use 3 colors to get a step effect where it starts off very 139 * light and quickly becomes dark and then a slow transition to 140 * be even darker. 141 */ 142 color &= CLEAR_ALPHA_MASK; 143 int startColor = color | HIGH_ALPHA; 144 int middleColor = color | MED_ALPHA; 145 int endColor = color | LOW_ALPHA; 146 int[] colors = new int[] {startColor, middleColor, endColor}; 147 GradientDrawable d = new GradientDrawable(GradientDrawable.Orientation.LEFT_RIGHT, colors); 148 d.setCornerRadii(CORNERS); 149 return d; 150 } 151 } 152