TimePickerClockDelegate.java revision 4420ae875de711a91dc10f7f4dd5a9cc62221ac8
1/* 2 * Copyright (C) 2013 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 17package android.widget; 18 19import android.annotation.Nullable; 20import android.content.Context; 21import android.content.res.ColorStateList; 22import android.content.res.Resources; 23import android.content.res.TypedArray; 24import android.os.Parcel; 25import android.os.Parcelable; 26import android.text.SpannableStringBuilder; 27import android.text.format.DateFormat; 28import android.text.format.DateUtils; 29import android.text.style.TtsSpan; 30import android.util.AttributeSet; 31import android.util.StateSet; 32import android.view.HapticFeedbackConstants; 33import android.view.LayoutInflater; 34import android.view.MotionEvent; 35import android.view.View; 36import android.view.View.AccessibilityDelegate; 37import android.view.View.MeasureSpec; 38import android.view.ViewGroup; 39import android.view.accessibility.AccessibilityEvent; 40import android.view.accessibility.AccessibilityNodeInfo; 41import android.view.accessibility.AccessibilityNodeInfo.AccessibilityAction; 42 43import com.android.internal.R; 44import com.android.internal.widget.NumericTextView; 45import com.android.internal.widget.NumericTextView.OnValueChangedListener; 46 47import java.util.Calendar; 48import java.util.Locale; 49 50/** 51 * A delegate implementing the radial clock-based TimePicker. 52 */ 53class TimePickerClockDelegate extends TimePicker.AbstractTimePickerDelegate implements 54 RadialTimePickerView.OnValueSelectedListener { 55 /** 56 * Delay in milliseconds before valid but potentially incomplete, for 57 * example "1" but not "12", keyboard edits are propagated from the 58 * hour / minute fields to the radial picker. 59 */ 60 private static final long DELAY_COMMIT_MILLIS = 2000; 61 62 // Index used by RadialPickerLayout 63 private static final int HOUR_INDEX = 0; 64 private static final int MINUTE_INDEX = 1; 65 66 // NOT a real index for the purpose of what's showing. 67 private static final int AMPM_INDEX = 2; 68 69 private static final int[] ATTRS_TEXT_COLOR = new int[] {R.attr.textColor}; 70 private static final int[] ATTRS_DISABLED_ALPHA = new int[] {R.attr.disabledAlpha}; 71 72 // LayoutLib relies on these constants. Change TimePickerClockDelegate_Delegate if 73 // modifying these. 74 static final int AM = 0; 75 static final int PM = 1; 76 77 private static final int HOURS_IN_HALF_DAY = 12; 78 79 private final NumericTextView mHourView; 80 private final NumericTextView mMinuteView; 81 private final View mAmPmLayout; 82 private final RadioButton mAmLabel; 83 private final RadioButton mPmLabel; 84 private final RadialTimePickerView mRadialTimePickerView; 85 private final TextView mSeparatorView; 86 87 private boolean mIsEnabled = true; 88 private boolean mAllowAutoAdvance; 89 private int mInitialHourOfDay; 90 private int mInitialMinute; 91 private boolean mIs24Hour; 92 private boolean mIsAmPmAtStart; 93 94 // Accessibility strings. 95 private String mSelectHours; 96 private String mSelectMinutes; 97 98 // Localization data. 99 private boolean mHourFormatShowLeadingZero; 100 private boolean mHourFormatStartsAtZero; 101 102 // Most recent time announcement values for accessibility. 103 private CharSequence mLastAnnouncedText; 104 private boolean mLastAnnouncedIsHour; 105 106 private Calendar mTempCalendar; 107 108 public TimePickerClockDelegate(TimePicker delegator, Context context, AttributeSet attrs, 109 int defStyleAttr, int defStyleRes) { 110 super(delegator, context); 111 112 // process style attributes 113 final TypedArray a = mContext.obtainStyledAttributes(attrs, 114 R.styleable.TimePicker, defStyleAttr, defStyleRes); 115 final LayoutInflater inflater = (LayoutInflater) mContext.getSystemService( 116 Context.LAYOUT_INFLATER_SERVICE); 117 final Resources res = mContext.getResources(); 118 119 mSelectHours = res.getString(R.string.select_hours); 120 mSelectMinutes = res.getString(R.string.select_minutes); 121 122 final int layoutResourceId = a.getResourceId(R.styleable.TimePicker_internalLayout, 123 R.layout.time_picker_material); 124 final View mainView = inflater.inflate(layoutResourceId, delegator); 125 final View headerView = mainView.findViewById(R.id.time_header); 126 headerView.setOnTouchListener(new NearestTouchDelegate()); 127 128 // Set up hour/minute labels. 129 mHourView = (NumericTextView) mainView.findViewById(R.id.hours); 130 mHourView.setOnClickListener(mClickListener); 131 mHourView.setOnFocusChangeListener(mFocusListener); 132 mHourView.setOnDigitEnteredListener(mDigitEnteredListener); 133 mHourView.setAccessibilityDelegate( 134 new ClickActionDelegate(context, R.string.select_hours)); 135 mSeparatorView = (TextView) mainView.findViewById(R.id.separator); 136 mMinuteView = (NumericTextView) mainView.findViewById(R.id.minutes); 137 mMinuteView.setOnClickListener(mClickListener); 138 mMinuteView.setOnFocusChangeListener(mFocusListener); 139 mMinuteView.setOnDigitEnteredListener(mDigitEnteredListener); 140 mMinuteView.setAccessibilityDelegate( 141 new ClickActionDelegate(context, R.string.select_minutes)); 142 mMinuteView.setRange(0, 59); 143 144 // Set up AM/PM labels. 145 mAmPmLayout = mainView.findViewById(R.id.ampm_layout); 146 mAmPmLayout.setOnTouchListener(new NearestTouchDelegate()); 147 148 final String[] amPmStrings = TimePicker.getAmPmStrings(context); 149 mAmLabel = (RadioButton) mAmPmLayout.findViewById(R.id.am_label); 150 mAmLabel.setText(obtainVerbatim(amPmStrings[0])); 151 mAmLabel.setOnClickListener(mClickListener); 152 ensureMinimumTextWidth(mAmLabel); 153 154 mPmLabel = (RadioButton) mAmPmLayout.findViewById(R.id.pm_label); 155 mPmLabel.setText(obtainVerbatim(amPmStrings[1])); 156 mPmLabel.setOnClickListener(mClickListener); 157 ensureMinimumTextWidth(mPmLabel); 158 159 // For the sake of backwards compatibility, attempt to extract the text 160 // color from the header time text appearance. If it's set, we'll let 161 // that override the "real" header text color. 162 ColorStateList headerTextColor = null; 163 164 @SuppressWarnings("deprecation") 165 final int timeHeaderTextAppearance = a.getResourceId( 166 R.styleable.TimePicker_headerTimeTextAppearance, 0); 167 if (timeHeaderTextAppearance != 0) { 168 final TypedArray textAppearance = mContext.obtainStyledAttributes(null, 169 ATTRS_TEXT_COLOR, 0, timeHeaderTextAppearance); 170 final ColorStateList legacyHeaderTextColor = textAppearance.getColorStateList(0); 171 headerTextColor = applyLegacyColorFixes(legacyHeaderTextColor); 172 textAppearance.recycle(); 173 } 174 175 if (headerTextColor == null) { 176 headerTextColor = a.getColorStateList(R.styleable.TimePicker_headerTextColor); 177 } 178 179 if (headerTextColor != null) { 180 mHourView.setTextColor(headerTextColor); 181 mSeparatorView.setTextColor(headerTextColor); 182 mMinuteView.setTextColor(headerTextColor); 183 mAmLabel.setTextColor(headerTextColor); 184 mPmLabel.setTextColor(headerTextColor); 185 } 186 187 // Set up header background, if available. 188 if (a.hasValueOrEmpty(R.styleable.TimePicker_headerBackground)) { 189 headerView.setBackground(a.getDrawable(R.styleable.TimePicker_headerBackground)); 190 } 191 192 a.recycle(); 193 194 mRadialTimePickerView = (RadialTimePickerView) mainView.findViewById(R.id.radial_picker); 195 mRadialTimePickerView.applyAttributes(attrs, defStyleAttr, defStyleRes); 196 197 setupListeners(); 198 199 mAllowAutoAdvance = true; 200 201 // Updates mHourFormat variables used below. 202 updateHourFormat(mLocale, mIs24Hour); 203 204 // Update hour text field. 205 final int minHour = mHourFormatStartsAtZero ? 0 : 1; 206 final int maxHour = (mIs24Hour ? 23 : 11) + minHour; 207 mHourView.setRange(minHour, maxHour); 208 mHourView.setShowLeadingZeroes(mHourFormatShowLeadingZero); 209 210 // Initialize with current time. 211 mTempCalendar = Calendar.getInstance(mLocale); 212 final int currentHour = mTempCalendar.get(Calendar.HOUR_OF_DAY); 213 final int currentMinute = mTempCalendar.get(Calendar.MINUTE); 214 initialize(currentHour, currentMinute, mIs24Hour, HOUR_INDEX); 215 } 216 217 /** 218 * Ensures that a TextView is wide enough to contain its text without 219 * wrapping or clipping. Measures the specified view and sets the minimum 220 * width to the view's desired width. 221 * 222 * @param v the text view to measure 223 */ 224 private static void ensureMinimumTextWidth(TextView v) { 225 v.measure(MeasureSpec.UNSPECIFIED, MeasureSpec.UNSPECIFIED); 226 227 // Set both the TextView and the View version of minimum 228 // width because they are subtly different. 229 final int minWidth = v.getMeasuredWidth(); 230 v.setMinWidth(minWidth); 231 v.setMinimumWidth(minWidth); 232 } 233 234 /** 235 * Determines how the hour should be formatted and updates member variables 236 * related to hour formatting. 237 * 238 * @param locale the locale in which the view is displayed 239 * @param is24Hour whether the view is in 24-hour (hour-of-day) mode 240 */ 241 private void updateHourFormat(Locale locale, boolean is24Hour) { 242 final String bestDateTimePattern = DateFormat.getBestDateTimePattern( 243 locale, is24Hour ? "Hm" : "hm"); 244 final int lengthPattern = bestDateTimePattern.length(); 245 boolean showLeadingZero = false; 246 char hourFormat = '\0'; 247 248 for (int i = 0; i < lengthPattern; i++) { 249 final char c = bestDateTimePattern.charAt(i); 250 if (c == 'H' || c == 'h' || c == 'K' || c == 'k') { 251 hourFormat = c; 252 if (i + 1 < lengthPattern && c == bestDateTimePattern.charAt(i + 1)) { 253 showLeadingZero = true; 254 } 255 break; 256 } 257 } 258 259 mHourFormatShowLeadingZero = showLeadingZero; 260 mHourFormatStartsAtZero = hourFormat == 'K' || hourFormat == 'H'; 261 } 262 263 private static final CharSequence obtainVerbatim(String text) { 264 return new SpannableStringBuilder().append(text, 265 new TtsSpan.VerbatimBuilder(text).build(), 0); 266 } 267 268 /** 269 * The legacy text color might have been poorly defined. Ensures that it 270 * has an appropriate activated state, using the selected state if one 271 * exists or modifying the default text color otherwise. 272 * 273 * @param color a legacy text color, or {@code null} 274 * @return a color state list with an appropriate activated state, or 275 * {@code null} if a valid activated state could not be generated 276 */ 277 @Nullable 278 private ColorStateList applyLegacyColorFixes(@Nullable ColorStateList color) { 279 if (color == null || color.hasState(R.attr.state_activated)) { 280 return color; 281 } 282 283 final int activatedColor; 284 final int defaultColor; 285 if (color.hasState(R.attr.state_selected)) { 286 activatedColor = color.getColorForState(StateSet.get( 287 StateSet.VIEW_STATE_ENABLED | StateSet.VIEW_STATE_SELECTED), 0); 288 defaultColor = color.getColorForState(StateSet.get( 289 StateSet.VIEW_STATE_ENABLED), 0); 290 } else { 291 activatedColor = color.getDefaultColor(); 292 293 // Generate a non-activated color using the disabled alpha. 294 final TypedArray ta = mContext.obtainStyledAttributes(ATTRS_DISABLED_ALPHA); 295 final float disabledAlpha = ta.getFloat(0, 0.30f); 296 defaultColor = multiplyAlphaComponent(activatedColor, disabledAlpha); 297 } 298 299 if (activatedColor == 0 || defaultColor == 0) { 300 // We somehow failed to obtain the colors. 301 return null; 302 } 303 304 final int[][] stateSet = new int[][] {{ R.attr.state_activated }, {}}; 305 final int[] colors = new int[] { activatedColor, defaultColor }; 306 return new ColorStateList(stateSet, colors); 307 } 308 309 private int multiplyAlphaComponent(int color, float alphaMod) { 310 final int srcRgb = color & 0xFFFFFF; 311 final int srcAlpha = (color >> 24) & 0xFF; 312 final int dstAlpha = (int) (srcAlpha * alphaMod + 0.5f); 313 return srcRgb | (dstAlpha << 24); 314 } 315 316 private static class ClickActionDelegate extends AccessibilityDelegate { 317 private final AccessibilityAction mClickAction; 318 319 public ClickActionDelegate(Context context, int resId) { 320 mClickAction = new AccessibilityAction( 321 AccessibilityNodeInfo.ACTION_CLICK, context.getString(resId)); 322 } 323 324 @Override 325 public void onInitializeAccessibilityNodeInfo(View host, AccessibilityNodeInfo info) { 326 super.onInitializeAccessibilityNodeInfo(host, info); 327 328 info.addAction(mClickAction); 329 } 330 } 331 332 private void initialize(int hourOfDay, int minute, boolean is24HourView, int index) { 333 mInitialHourOfDay = hourOfDay; 334 mInitialMinute = minute; 335 mIs24Hour = is24HourView; 336 updateUI(index); 337 } 338 339 private void setupListeners() { 340 mRadialTimePickerView.setOnValueSelectedListener(this); 341 } 342 343 private void updateUI(int index) { 344 updateHeaderAmPm(); 345 updateHeaderHour(mInitialHourOfDay, false); 346 updateHeaderSeparator(); 347 updateHeaderMinute(mInitialMinute, false); 348 updateRadialPicker(index); 349 350 mDelegator.invalidate(); 351 } 352 353 private void updateRadialPicker(int index) { 354 mRadialTimePickerView.initialize(mInitialHourOfDay, mInitialMinute, mIs24Hour); 355 setCurrentItemShowing(index, false, true); 356 } 357 358 private void updateHeaderAmPm() { 359 if (mIs24Hour) { 360 mAmPmLayout.setVisibility(View.GONE); 361 } else { 362 // Ensure that AM/PM layout is in the correct position. 363 final String dateTimePattern = DateFormat.getBestDateTimePattern(mLocale, "hm"); 364 final boolean isAmPmAtStart = dateTimePattern.startsWith("a"); 365 setAmPmAtStart(isAmPmAtStart); 366 367 updateAmPmLabelStates(mInitialHourOfDay < 12 ? AM : PM); 368 } 369 } 370 371 private void setAmPmAtStart(boolean isAmPmAtStart) { 372 if (mIsAmPmAtStart != isAmPmAtStart) { 373 mIsAmPmAtStart = isAmPmAtStart; 374 375 final RelativeLayout.LayoutParams params = 376 (RelativeLayout.LayoutParams) mAmPmLayout.getLayoutParams(); 377 if (params.getRule(RelativeLayout.RIGHT_OF) != 0 || 378 params.getRule(RelativeLayout.LEFT_OF) != 0) { 379 if (isAmPmAtStart) { 380 params.removeRule(RelativeLayout.RIGHT_OF); 381 params.addRule(RelativeLayout.LEFT_OF, mHourView.getId()); 382 } else { 383 params.removeRule(RelativeLayout.LEFT_OF); 384 params.addRule(RelativeLayout.RIGHT_OF, mMinuteView.getId()); 385 } 386 } 387 388 mAmPmLayout.setLayoutParams(params); 389 } 390 } 391 392 /** 393 * Set the current hour. 394 */ 395 @Override 396 public void setHour(int hour) { 397 if (mInitialHourOfDay != hour) { 398 mInitialHourOfDay = hour; 399 updateHeaderHour(hour, true); 400 updateHeaderAmPm(); 401 mRadialTimePickerView.setCurrentHour(hour); 402 mRadialTimePickerView.setAmOrPm(mInitialHourOfDay < 12 ? AM : PM); 403 mDelegator.invalidate(); 404 onTimeChanged(); 405 } 406 } 407 408 /** 409 * @return the current hour in the range (0-23) 410 */ 411 @Override 412 public int getHour() { 413 final int currentHour = mRadialTimePickerView.getCurrentHour(); 414 if (mIs24Hour) { 415 return currentHour; 416 } 417 418 if (mRadialTimePickerView.getAmOrPm() == PM) { 419 return (currentHour % HOURS_IN_HALF_DAY) + HOURS_IN_HALF_DAY; 420 } else { 421 return currentHour % HOURS_IN_HALF_DAY; 422 } 423 } 424 425 /** 426 * Set the current minute (0-59). 427 */ 428 @Override 429 public void setMinute(int minute) { 430 if (mInitialMinute != minute) { 431 mInitialMinute = minute; 432 updateHeaderMinute(minute, true); 433 mRadialTimePickerView.setCurrentMinute(minute); 434 mDelegator.invalidate(); 435 onTimeChanged(); 436 } 437 } 438 439 /** 440 * @return The current minute. 441 */ 442 @Override 443 public int getMinute() { 444 return mRadialTimePickerView.getCurrentMinute(); 445 } 446 447 /** 448 * Sets whether time is displayed in 24-hour mode or 12-hour mode with 449 * AM/PM indicators. 450 * 451 * @param is24Hour {@code true} to display time in 24-hour mode or 452 * {@code false} for 12-hour mode with AM/PM 453 */ 454 public void setIs24Hour(boolean is24Hour) { 455 if (mIs24Hour != is24Hour) { 456 mIs24Hour = is24Hour; 457 mInitialHourOfDay = getHour(); 458 459 updateUI(mRadialTimePickerView.getCurrentItemShowing()); 460 } 461 } 462 463 /** 464 * @return {@code true} if time is displayed in 24-hour mode, or 465 * {@code false} if time is displayed in 12-hour mode with AM/PM 466 * indicators 467 */ 468 @Override 469 public boolean is24Hour() { 470 return mIs24Hour; 471 } 472 473 @Override 474 public void setOnTimeChangedListener(TimePicker.OnTimeChangedListener callback) { 475 mOnTimeChangedListener = callback; 476 } 477 478 @Override 479 public void setEnabled(boolean enabled) { 480 mHourView.setEnabled(enabled); 481 mMinuteView.setEnabled(enabled); 482 mAmLabel.setEnabled(enabled); 483 mPmLabel.setEnabled(enabled); 484 mRadialTimePickerView.setEnabled(enabled); 485 mIsEnabled = enabled; 486 } 487 488 @Override 489 public boolean isEnabled() { 490 return mIsEnabled; 491 } 492 493 @Override 494 public int getBaseline() { 495 // does not support baseline alignment 496 return -1; 497 } 498 499 @Override 500 public Parcelable onSaveInstanceState(Parcelable superState) { 501 return new SavedState(superState, getHour(), getMinute(), 502 is24Hour(), getCurrentItemShowing()); 503 } 504 505 @Override 506 public void onRestoreInstanceState(Parcelable state) { 507 final SavedState ss = (SavedState) state; 508 initialize(ss.getHour(), ss.getMinute(), ss.is24HourMode(), ss.getCurrentItemShowing()); 509 mRadialTimePickerView.invalidate(); 510 } 511 512 @Override 513 public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) { 514 onPopulateAccessibilityEvent(event); 515 return true; 516 } 517 518 @Override 519 public void onPopulateAccessibilityEvent(AccessibilityEvent event) { 520 int flags = DateUtils.FORMAT_SHOW_TIME; 521 if (mIs24Hour) { 522 flags |= DateUtils.FORMAT_24HOUR; 523 } else { 524 flags |= DateUtils.FORMAT_12HOUR; 525 } 526 mTempCalendar.set(Calendar.HOUR_OF_DAY, getHour()); 527 mTempCalendar.set(Calendar.MINUTE, getMinute()); 528 String selectedDate = DateUtils.formatDateTime(mContext, 529 mTempCalendar.getTimeInMillis(), flags); 530 event.getText().add(selectedDate); 531 } 532 533 /** 534 * @return the index of the current item showing 535 */ 536 private int getCurrentItemShowing() { 537 return mRadialTimePickerView.getCurrentItemShowing(); 538 } 539 540 /** 541 * Propagate the time change 542 */ 543 private void onTimeChanged() { 544 mDelegator.sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_SELECTED); 545 if (mOnTimeChangedListener != null) { 546 mOnTimeChangedListener.onTimeChanged(mDelegator, getHour(), getMinute()); 547 } 548 } 549 550 /** 551 * Used to save / restore state of time picker 552 */ 553 private static class SavedState extends View.BaseSavedState { 554 555 private final int mHour; 556 private final int mMinute; 557 private final boolean mIs24HourMode; 558 private final int mCurrentItemShowing; 559 560 private SavedState(Parcelable superState, int hour, int minute, boolean is24HourMode, 561 int currentItemShowing) { 562 super(superState); 563 mHour = hour; 564 mMinute = minute; 565 mIs24HourMode = is24HourMode; 566 mCurrentItemShowing = currentItemShowing; 567 } 568 569 private SavedState(Parcel in) { 570 super(in); 571 mHour = in.readInt(); 572 mMinute = in.readInt(); 573 mIs24HourMode = (in.readInt() == 1); 574 mCurrentItemShowing = in.readInt(); 575 } 576 577 public int getHour() { 578 return mHour; 579 } 580 581 public int getMinute() { 582 return mMinute; 583 } 584 585 public boolean is24HourMode() { 586 return mIs24HourMode; 587 } 588 589 public int getCurrentItemShowing() { 590 return mCurrentItemShowing; 591 } 592 593 @Override 594 public void writeToParcel(Parcel dest, int flags) { 595 super.writeToParcel(dest, flags); 596 dest.writeInt(mHour); 597 dest.writeInt(mMinute); 598 dest.writeInt(mIs24HourMode ? 1 : 0); 599 dest.writeInt(mCurrentItemShowing); 600 } 601 602 @SuppressWarnings({"unused", "hiding"}) 603 public static final Creator<SavedState> CREATOR = new Creator<SavedState>() { 604 public SavedState createFromParcel(Parcel in) { 605 return new SavedState(in); 606 } 607 608 public SavedState[] newArray(int size) { 609 return new SavedState[size]; 610 } 611 }; 612 } 613 614 private void tryVibrate() { 615 mDelegator.performHapticFeedback(HapticFeedbackConstants.CLOCK_TICK); 616 } 617 618 private void updateAmPmLabelStates(int amOrPm) { 619 final boolean isAm = amOrPm == AM; 620 mAmLabel.setActivated(isAm); 621 mAmLabel.setChecked(isAm); 622 623 final boolean isPm = amOrPm == PM; 624 mPmLabel.setActivated(isPm); 625 mPmLabel.setChecked(isPm); 626 } 627 628 /** 629 * Called by the picker for updating the header display. 630 */ 631 @Override 632 public void onValueSelected(int pickerIndex, int newValue, boolean autoAdvance) { 633 switch (pickerIndex) { 634 case HOUR_INDEX: 635 if (mAllowAutoAdvance && autoAdvance) { 636 updateHeaderHour(newValue, false); 637 setCurrentItemShowing(MINUTE_INDEX, true, false); 638 mDelegator.announceForAccessibility(newValue + ". " + mSelectMinutes); 639 } else { 640 updateHeaderHour(newValue, true); 641 } 642 break; 643 case MINUTE_INDEX: 644 updateHeaderMinute(newValue, true); 645 break; 646 case AMPM_INDEX: 647 updateAmPmLabelStates(newValue); 648 break; 649 } 650 651 if (mOnTimeChangedListener != null) { 652 mOnTimeChangedListener.onTimeChanged(mDelegator, getHour(), getMinute()); 653 } 654 } 655 656 /** 657 * Converts hour-of-day (0-23) time into a localized hour number. 658 * 659 * @param hourOfDay the hour-of-day (0-23) 660 * @return a localized hour number 661 */ 662 private int getLocalizedHour(int hourOfDay) { 663 if (!mIs24Hour) { 664 // Convert to hour-of-am-pm. 665 hourOfDay %= 12; 666 } 667 668 if (!mHourFormatStartsAtZero && hourOfDay == 0) { 669 // Convert to clock-hour (either of-day or of-am-pm). 670 hourOfDay = mIs24Hour ? 24 : 12; 671 } 672 673 return hourOfDay; 674 } 675 676 private void updateHeaderHour(int hourOfDay, boolean announce) { 677 final int localizedHour = getLocalizedHour(hourOfDay); 678 mHourView.setValue(localizedHour); 679 680 if (announce) { 681 tryAnnounceForAccessibility(mHourView.getText(), true); 682 } 683 } 684 685 private void updateHeaderMinute(int minuteOfHour, boolean announce) { 686 mMinuteView.setValue(minuteOfHour); 687 688 if (announce) { 689 tryAnnounceForAccessibility(mMinuteView.getText(), false); 690 } 691 } 692 693 /** 694 * The time separator is defined in the Unicode CLDR and cannot be supposed to be ":". 695 * 696 * See http://unicode.org/cldr/trac/browser/trunk/common/main 697 * 698 * We pass the correct "skeleton" depending on 12 or 24 hours view and then extract the 699 * separator as the character which is just after the hour marker in the returned pattern. 700 */ 701 private void updateHeaderSeparator() { 702 final String bestDateTimePattern = DateFormat.getBestDateTimePattern(mLocale, 703 (mIs24Hour) ? "Hm" : "hm"); 704 final String separatorText; 705 // See http://www.unicode.org/reports/tr35/tr35-dates.html for hour formats 706 final char[] hourFormats = {'H', 'h', 'K', 'k'}; 707 int hIndex = lastIndexOfAny(bestDateTimePattern, hourFormats); 708 if (hIndex == -1) { 709 // Default case 710 separatorText = ":"; 711 } else { 712 separatorText = Character.toString(bestDateTimePattern.charAt(hIndex + 1)); 713 } 714 mSeparatorView.setText(separatorText); 715 } 716 717 static private int lastIndexOfAny(String str, char[] any) { 718 final int lengthAny = any.length; 719 if (lengthAny > 0) { 720 for (int i = str.length() - 1; i >= 0; i--) { 721 char c = str.charAt(i); 722 for (int j = 0; j < lengthAny; j++) { 723 if (c == any[j]) { 724 return i; 725 } 726 } 727 } 728 } 729 return -1; 730 } 731 732 private void tryAnnounceForAccessibility(CharSequence text, boolean isHour) { 733 if (mLastAnnouncedIsHour != isHour || !text.equals(mLastAnnouncedText)) { 734 // TODO: Find a better solution, potentially live regions? 735 mDelegator.announceForAccessibility(text); 736 mLastAnnouncedText = text; 737 mLastAnnouncedIsHour = isHour; 738 } 739 } 740 741 /** 742 * Show either Hours or Minutes. 743 */ 744 private void setCurrentItemShowing(int index, boolean animateCircle, boolean announce) { 745 mRadialTimePickerView.setCurrentItemShowing(index, animateCircle); 746 747 if (index == HOUR_INDEX) { 748 if (announce) { 749 mDelegator.announceForAccessibility(mSelectHours); 750 } 751 } else { 752 if (announce) { 753 mDelegator.announceForAccessibility(mSelectMinutes); 754 } 755 } 756 757 mHourView.setActivated(index == HOUR_INDEX); 758 mMinuteView.setActivated(index == MINUTE_INDEX); 759 } 760 761 private void setAmOrPm(int amOrPm) { 762 updateAmPmLabelStates(amOrPm); 763 mRadialTimePickerView.setAmOrPm(amOrPm); 764 } 765 766 private final OnValueChangedListener mDigitEnteredListener = new OnValueChangedListener() { 767 @Override 768 public void onValueChanged(NumericTextView view, int value, 769 boolean isValid, boolean isFinished) { 770 final Runnable commitCallback; 771 final View nextFocusTarget; 772 if (view == mHourView) { 773 commitCallback = mCommitHour; 774 nextFocusTarget = view.isFocused() ? mMinuteView : null; 775 } else if (view == mMinuteView) { 776 commitCallback = mCommitMinute; 777 nextFocusTarget = null; 778 } else { 779 return; 780 } 781 782 view.removeCallbacks(commitCallback); 783 784 if (isValid) { 785 if (isFinished) { 786 // Done with hours entry, make visual updates 787 // immediately and move to next focus if needed. 788 commitCallback.run(); 789 790 if (nextFocusTarget != null) { 791 nextFocusTarget.requestFocus(); 792 } 793 } else { 794 // May still be making changes. Postpone visual 795 // updates to prevent distracting the user. 796 view.postDelayed(commitCallback, DELAY_COMMIT_MILLIS); 797 } 798 } 799 } 800 }; 801 802 private final Runnable mCommitHour = new Runnable() { 803 @Override 804 public void run() { 805 setHour(mHourView.getValue()); 806 } 807 }; 808 809 private final Runnable mCommitMinute = new Runnable() { 810 @Override 811 public void run() { 812 setMinute(mMinuteView.getValue()); 813 } 814 }; 815 816 private final View.OnFocusChangeListener mFocusListener = new View.OnFocusChangeListener() { 817 @Override 818 public void onFocusChange(View v, boolean focused) { 819 if (focused) { 820 switch (v.getId()) { 821 case R.id.am_label: 822 setAmOrPm(AM); 823 break; 824 case R.id.pm_label: 825 setAmOrPm(PM); 826 break; 827 case R.id.hours: 828 setCurrentItemShowing(HOUR_INDEX, true, true); 829 break; 830 case R.id.minutes: 831 setCurrentItemShowing(MINUTE_INDEX, true, true); 832 break; 833 default: 834 // Failed to handle this click, don't vibrate. 835 return; 836 } 837 838 tryVibrate(); 839 } 840 } 841 }; 842 843 private final View.OnClickListener mClickListener = new View.OnClickListener() { 844 @Override 845 public void onClick(View v) { 846 847 final int amOrPm; 848 switch (v.getId()) { 849 case R.id.am_label: 850 setAmOrPm(AM); 851 break; 852 case R.id.pm_label: 853 setAmOrPm(PM); 854 break; 855 case R.id.hours: 856 setCurrentItemShowing(HOUR_INDEX, true, true); 857 break; 858 case R.id.minutes: 859 setCurrentItemShowing(MINUTE_INDEX, true, true); 860 break; 861 default: 862 // Failed to handle this click, don't vibrate. 863 return; 864 } 865 866 tryVibrate(); 867 } 868 }; 869 870 /** 871 * Delegates unhandled touches in a view group to the nearest child view. 872 */ 873 private static class NearestTouchDelegate implements View.OnTouchListener { 874 private View mInitialTouchTarget; 875 876 @Override 877 public boolean onTouch(View view, MotionEvent motionEvent) { 878 final int actionMasked = motionEvent.getActionMasked(); 879 if (actionMasked == MotionEvent.ACTION_DOWN) { 880 mInitialTouchTarget = findNearestChild((ViewGroup) view, 881 (int) motionEvent.getX(), (int) motionEvent.getY()); 882 } 883 884 final View child = mInitialTouchTarget; 885 if (child == null) { 886 return false; 887 } 888 889 final float offsetX = view.getScrollX() - child.getLeft(); 890 final float offsetY = view.getScrollY() - child.getTop(); 891 motionEvent.offsetLocation(offsetX, offsetY); 892 final boolean handled = child.dispatchTouchEvent(motionEvent); 893 motionEvent.offsetLocation(-offsetX, -offsetY); 894 895 if (actionMasked == MotionEvent.ACTION_UP 896 || actionMasked == MotionEvent.ACTION_CANCEL) { 897 mInitialTouchTarget = null; 898 } 899 900 return handled; 901 } 902 903 private View findNearestChild(ViewGroup v, int x, int y) { 904 View bestChild = null; 905 int bestDist = Integer.MAX_VALUE; 906 907 for (int i = 0, count = v.getChildCount(); i < count; i++) { 908 final View child = v.getChildAt(i); 909 final int dX = x - (child.getLeft() + child.getWidth() / 2); 910 final int dY = y - (child.getTop() + child.getHeight() / 2); 911 final int dist = dX * dX + dY * dY; 912 if (bestDist > dist) { 913 bestChild = child; 914 bestDist = dist; 915 } 916 } 917 918 return bestChild; 919 } 920 } 921} 922