1 /* 2 * Copyright (C) 2016 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.inputmethod.latin.car; 18 19 import android.animation.Animator; 20 import android.animation.ValueAnimator; 21 import android.annotation.SuppressLint; 22 import android.content.Context; 23 import android.content.res.TypedArray; 24 import android.graphics.Bitmap; 25 import android.graphics.Canvas; 26 import android.graphics.Color; 27 import android.graphics.Paint; 28 import android.graphics.Paint.Align; 29 import android.graphics.PorterDuff; 30 import android.graphics.Rect; 31 import android.graphics.Region.Op; 32 import android.graphics.Typeface; 33 import android.graphics.drawable.Drawable; 34 import android.inputmethodservice.Keyboard; 35 import android.inputmethodservice.Keyboard.Key; 36 import android.os.Handler; 37 import android.os.Message; 38 import android.util.AttributeSet; 39 import android.util.Log; 40 import android.util.TypedValue; 41 import android.view.GestureDetector; 42 import android.view.Gravity; 43 import android.view.LayoutInflater; 44 import android.view.MotionEvent; 45 import android.view.View; 46 import android.view.ViewConfiguration; 47 import android.view.ViewGroup.LayoutParams; 48 import android.view.accessibility.AccessibilityManager; 49 import android.view.animation.AccelerateDecelerateInterpolator; 50 import android.view.animation.LinearInterpolator; 51 import android.widget.PopupWindow; 52 import android.widget.TextView; 53 54 import com.android.inputmethod.latin.R; 55 56 import java.lang.ref.WeakReference; 57 import java.util.Arrays; 58 import java.util.HashMap; 59 import java.util.List; 60 import java.util.Locale; 61 import java.util.Map; 62 import java.util.regex.Pattern; 63 64 /** 65 * A view that renders a virtual {@link android.inputmethodservice.Keyboard}. It handles rendering of keys and 66 * detecting key presses and touch movements. 67 * 68 * @attr ref android.R.styleable#KeyboardView_keyBackground 69 * @attr ref android.R.styleable#KeyboardView_keyPreviewLayout 70 * @attr ref android.R.styleable#KeyboardView_keyPreviewOffset 71 * @attr ref android.R.styleable#KeyboardView_labelTextSize 72 * @attr ref android.R.styleable#KeyboardView_keyTextSize 73 * @attr ref android.R.styleable#KeyboardView_keyTextColor 74 * @attr ref android.R.styleable#KeyboardView_verticalCorrection 75 * @attr ref android.R.styleable#KeyboardView_popupLayout 76 */ 77 public class KeyboardView extends View implements View.OnClickListener { 78 79 /** 80 * Listener for virtual keyboard events. 81 */ 82 public interface OnKeyboardActionListener { 83 84 /** 85 * Called when the user presses a key. This is sent before the {@link #onKey} is called. 86 * For keys that repeat, this is only called once. 87 * @param primaryCode the unicode of the key being pressed. If the touch is not on a valid 88 * key, the value will be zero. 89 */ 90 void onPress(int primaryCode); 91 92 /** 93 * Called when the user releases a key. This is sent after the {@link #onKey} is called. 94 * For keys that repeat, this is only called once. 95 * @param primaryCode the code of the key that was released 96 */ 97 void onRelease(int primaryCode); 98 99 /** 100 * Send a key press to the listener. 101 * @param primaryCode this is the key that was pressed 102 * @param keyCodes the codes for all the possible alternative keys 103 * with the primary code being the first. If the primary key code is 104 * a single character such as an alphabet or number or symbol, the alternatives 105 * will include other characters that may be on the same key or adjacent keys. 106 * These codes are useful to correct for accidental presses of a key adjacent to 107 * the intended key. 108 */ 109 void onKey(int primaryCode, int[] keyCodes); 110 111 /** 112 * Sends a sequence of characters to the listener. 113 * @param text the sequence of characters to be displayed. 114 */ 115 void onText(CharSequence text); 116 117 /** 118 * Called when the user quickly moves the finger from right to left. 119 */ 120 void swipeLeft(); 121 122 /** 123 * Called when the user quickly moves the finger from left to right. 124 */ 125 void swipeRight(); 126 127 /** 128 * Called when the user quickly moves the finger from up to down. 129 */ 130 void swipeDown(); 131 132 /** 133 * Called when the user quickly moves the finger from down to up. 134 */ 135 void swipeUp(); 136 137 /** 138 * Called when we want to stop keyboard input. 139 */ 140 void stopInput(); 141 } 142 143 private static final boolean DEBUG = false; 144 private static final int NOT_A_KEY = -1; 145 private static final int[] KEY_DELETE = { Keyboard.KEYCODE_DELETE }; 146 private static final int SCRIM_ALPHA = 242; // 95% opacity. 147 private static final int MAX_ALPHA = 255; 148 private static final float MIN_ANIMATION_VALUE = 0.0f; 149 private static final float MAX_ANIMATION_VALUE = 1.0f; 150 private static final Pattern PUNCTUATION_PATTERN = Pattern.compile("_|-|,|\\."); 151 //private static final int[] LONG_PRESSABLE_STATE_SET = { R.attr.state_long_pressable }; 152 private final Context mContext; 153 154 private Keyboard mKeyboard; 155 private int mCurrentKeyIndex = NOT_A_KEY; 156 private int mLabelTextSize; 157 private int mKeyTextSize; 158 private int mKeyPunctuationSize; 159 private int mKeyTextColorPrimary; 160 private int mKeyTextColorSecondary; 161 private String mFontFamily; 162 private int mTextStyle = Typeface.BOLD; 163 164 private TextView mPreviewText; 165 private final PopupWindow mPreviewPopup; 166 private int mPreviewTextSizeLarge; 167 private int mPreviewOffset; 168 private int mPreviewHeight; 169 // Working variable 170 private final int[] mCoordinates = new int[2]; 171 172 private KeyboardView mPopupKeyboardView; 173 private boolean mPopupKeyboardOnScreen; 174 private View mPopupParent; 175 private int mMiniKeyboardOffsetX; 176 private int mMiniKeyboardOffsetY; 177 private final Map<Key,View> mMiniKeyboardCache; 178 private Key[] mKeys; 179 180 /** Listener for {@link OnKeyboardActionListener}. */ 181 private OnKeyboardActionListener mKeyboardActionListener; 182 183 private static final int MSG_SHOW_PREVIEW = 1; 184 private static final int MSG_REMOVE_PREVIEW = 2; 185 private static final int MSG_REPEAT = 3; 186 private static final int MSG_LONGPRESS = 4; 187 188 private static final int DELAY_BEFORE_PREVIEW = 0; 189 private static final int DELAY_AFTER_PREVIEW = 70; 190 private static final int DEBOUNCE_TIME = 70; 191 192 private static final int ANIMATE_IN_OUT_DURATION_MS = 300; 193 private static final int ANIMATE_SCRIM_DURATION_MS = 150; 194 private static final int ANIMATE_SCRIM_DELAY_MS = 225; 195 196 private int mVerticalCorrection; 197 private int mProximityThreshold; 198 199 private final boolean mPreviewCentered = false; 200 private boolean mShowPreview = true; 201 private final boolean mShowTouchPoints = true; 202 private int mPopupPreviewX; 203 private int mPopupPreviewY; 204 private int mPopupScrimColor; 205 private int mBackgroundColor; 206 207 private int mLastX; 208 private int mLastY; 209 private int mStartX; 210 private int mStartY; 211 212 private boolean mProximityCorrectOn; 213 214 private final Paint mPaint; 215 private final Rect mPadding; 216 217 private long mDownTime; 218 private long mLastMoveTime; 219 private int mLastKey; 220 private int mLastCodeX; 221 private int mLastCodeY; 222 private int mCurrentKey = NOT_A_KEY; 223 private int mDownKey = NOT_A_KEY; 224 private long mLastKeyTime; 225 private long mCurrentKeyTime; 226 private final int[] mKeyIndices = new int[12]; 227 private GestureDetector mGestureDetector; 228 private int mRepeatKeyIndex = NOT_A_KEY; 229 private boolean mAbortKey; 230 private Key mInvalidatedKey; 231 private final Rect mClipRegion = new Rect(0, 0, 0, 0); 232 private boolean mPossiblePoly; 233 private final SwipeTracker mSwipeTracker = new SwipeTracker(); 234 private final int mSwipeThreshold; 235 private final boolean mDisambiguateSwipe; 236 237 // Variables for dealing with multiple pointers 238 private int mOldPointerCount = 1; 239 private float mOldPointerX; 240 private float mOldPointerY; 241 242 private Drawable mKeyBackground; 243 244 private static final int REPEAT_INTERVAL = 50; // ~20 keys per second 245 private static final int REPEAT_START_DELAY = 400; 246 private static final int LONGPRESS_TIMEOUT = ViewConfiguration.getLongPressTimeout(); 247 248 private static int MAX_NEARBY_KEYS = 12; 249 private final int[] mDistances = new int[MAX_NEARBY_KEYS]; 250 251 // For multi-tap 252 private int mLastSentIndex; 253 private int mTapCount; 254 private long mLastTapTime; 255 private boolean mInMultiTap; 256 private static final int MULTITAP_INTERVAL = 800; // milliseconds 257 private final StringBuilder mPreviewLabel = new StringBuilder(1); 258 259 /** Whether the keyboard bitmap needs to be redrawn before it's blitted. **/ 260 private boolean mDrawPending; 261 /** The dirty region in the keyboard bitmap */ 262 private final Rect mDirtyRect = new Rect(); 263 /** The keyboard bitmap for faster updates */ 264 private Bitmap mBuffer; 265 /** Notes if the keyboard just changed, so that we could possibly reallocate the mBuffer. */ 266 private boolean mKeyboardChanged; 267 /** The canvas for the above mutable keyboard bitmap */ 268 private Canvas mCanvas; 269 /** The accessibility manager for accessibility support */ 270 private AccessibilityManager mAccessibilityManager; 271 272 private boolean mUseSecondaryColor = true; 273 private Locale mLocale; 274 275 Handler mHandler = new KeyboardHander(this); 276 277 private float mAnimateInValue; 278 private ValueAnimator mAnimateInAnimator; 279 private float mAnimateOutValue; 280 private ValueAnimator mAnimateOutAnimator; 281 private int mScrimAlpha; 282 private ValueAnimator mScrimAlphaAnimator; 283 private int mAnimateCenter; 284 285 public KeyboardView(Context context, AttributeSet attrs) { 286 this(context, attrs, 0); 287 } 288 289 public KeyboardView(Context context, AttributeSet attrs, int defStyle) { 290 super(context, attrs, defStyle); 291 mContext = context; 292 293 TypedArray a = 294 context.obtainStyledAttributes( 295 attrs, R.styleable.KeyboardView, defStyle, 0); 296 297 LayoutInflater inflate = 298 (LayoutInflater) context 299 .getSystemService(Context.LAYOUT_INFLATER_SERVICE); 300 301 int previewLayout = 0; 302 303 int n = a.getIndexCount(); 304 305 for (int i = 0; i < n; i++) { 306 int attr = a.getIndex(i); 307 308 switch (attr) { 309 case R.styleable.KeyboardView_keyBackground: 310 mKeyBackground = a.getDrawable(attr); 311 break; 312 /* case com.android.internal.R.styleable.KeyboardView_verticalCorrection: 313 mVerticalCorrection = a.getDimensionPixelOffset(attr, 0); 314 break; 315 case com.android.internal.R.styleable.KeyboardView_keyPreviewLayout: 316 previewLayout = a.getResourceId(attr, 0); 317 break; 318 case com.android.internal.R.styleable.KeyboardView_keyPreviewOffset: 319 mPreviewOffset = a.getDimensionPixelOffset(attr, 0); 320 break; 321 case com.android.internal.R.styleable.KeyboardView_keyPreviewHeight: 322 mPreviewHeight = a.getDimensionPixelSize(attr, 80); 323 break; */ 324 case R.styleable.KeyboardView_keyTextSize: 325 mKeyTextSize = a.getDimensionPixelSize(attr, 18); 326 break; 327 case R.styleable.KeyboardView_keyTextColorPrimary: 328 mKeyTextColorPrimary = a.getColor(attr, 0xFF000000); 329 break; 330 case R.styleable.KeyboardView_keyTextColorSecondary: 331 mKeyTextColorSecondary = a.getColor(attr, 0x99000000); 332 break; 333 case R.styleable.KeyboardView_labelTextSize: 334 mLabelTextSize = a.getDimensionPixelSize(attr, 14); 335 break; 336 case R.styleable.KeyboardView_fontFamily: 337 mFontFamily = a.getString(attr); 338 break; 339 case R.styleable.KeyboardView_textStyle: 340 mTextStyle = a.getInt(attr, 0); 341 break; 342 } 343 } 344 345 a.recycle(); 346 a = mContext.obtainStyledAttributes(R.styleable.KeyboardView); 347 a.recycle(); 348 349 mPreviewPopup = new PopupWindow(context); 350 if (previewLayout != 0) { 351 mPreviewText = (TextView) inflate.inflate(previewLayout, null); 352 mPreviewTextSizeLarge = (int) mPreviewText.getTextSize(); 353 mPreviewPopup.setContentView(mPreviewText); 354 mPreviewPopup.setBackgroundDrawable(null); 355 } else { 356 mShowPreview = false; 357 } 358 359 mPreviewPopup.setTouchable(false); 360 361 mPopupParent = this; 362 //mPredicting = true; 363 364 mPaint = new Paint(); 365 mPaint.setAntiAlias(true); 366 mPaint.setTextSize(mKeyTextSize); 367 mPaint.setTextAlign(Align.CENTER); 368 mPaint.setAlpha(MAX_ALPHA); 369 370 if (mFontFamily != null) { 371 Typeface typeface = Typeface.create(mFontFamily, mTextStyle); 372 mPaint.setTypeface(typeface); 373 } 374 else { 375 mPaint.setTypeface(Typeface.create(Typeface.DEFAULT, mTextStyle)); 376 } 377 378 mPadding = new Rect(0, 0, 0, 0); 379 mMiniKeyboardCache = new HashMap<Key,View>(); 380 mKeyBackground.getPadding(mPadding); 381 382 mSwipeThreshold = (int) (500 * getResources().getDisplayMetrics().density); 383 mDisambiguateSwipe = true; 384 385 int color = getResources().getColor(R.color.car_dark_blue_grey_700); 386 mPopupScrimColor = Color.argb( 387 SCRIM_ALPHA, Color.red(color), Color.green(color), Color.blue(color)); 388 mBackgroundColor = Color.TRANSPARENT; 389 390 mKeyPunctuationSize = 391 (int) getResources().getDimension(R.dimen.keyboard_key_punctuation_height); 392 393 resetMultiTap(); 394 initGestureDetector(); 395 396 mAnimateInValue = MAX_ANIMATION_VALUE; 397 mAnimateInAnimator = ValueAnimator.ofFloat(MIN_ANIMATION_VALUE, MAX_ANIMATION_VALUE); 398 AccelerateDecelerateInterpolator accInterpolator = new AccelerateDecelerateInterpolator(); 399 mAnimateInAnimator.setInterpolator(accInterpolator); 400 mAnimateInAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() { 401 @Override 402 public void onAnimationUpdate(ValueAnimator valueAnimator) { 403 mAnimateInValue = (float) valueAnimator.getAnimatedValue(); 404 invalidateAllKeys(); 405 } 406 }); 407 mAnimateInAnimator.setDuration(ANIMATE_IN_OUT_DURATION_MS); 408 409 mScrimAlpha = 0; 410 mScrimAlphaAnimator = ValueAnimator.ofInt(0, SCRIM_ALPHA); 411 LinearInterpolator linearInterpolator = new LinearInterpolator(); 412 mScrimAlphaAnimator.setInterpolator(linearInterpolator); 413 mScrimAlphaAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() { 414 @Override 415 public void onAnimationUpdate(ValueAnimator valueAnimator) { 416 mScrimAlpha = (int) valueAnimator.getAnimatedValue(); 417 invalidateAllKeys(); 418 } 419 }); 420 mScrimAlphaAnimator.setDuration(ANIMATE_SCRIM_DURATION_MS); 421 422 mAnimateOutValue = MIN_ANIMATION_VALUE; 423 mAnimateOutAnimator = ValueAnimator.ofFloat(MIN_ANIMATION_VALUE, MAX_ANIMATION_VALUE); 424 mAnimateOutAnimator.setInterpolator(accInterpolator); 425 mAnimateOutAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() { 426 @Override 427 public void onAnimationUpdate(ValueAnimator valueAnimator) { 428 mAnimateOutValue = (float) valueAnimator.getAnimatedValue(); 429 invalidateAllKeys(); 430 } 431 }); 432 mAnimateOutAnimator.setDuration(ANIMATE_IN_OUT_DURATION_MS); 433 mAnimateOutAnimator.addListener(new Animator.AnimatorListener() { 434 @Override 435 public void onAnimationEnd(Animator animation) { 436 setVisibility(View.GONE); 437 mAnimateOutValue = MIN_ANIMATION_VALUE; 438 } 439 440 @Override 441 public void onAnimationCancel(Animator animator) { 442 } 443 444 @Override 445 public void onAnimationRepeat(Animator animator) { 446 } 447 448 @Override 449 public void onAnimationStart(Animator animator) { 450 } 451 }); 452 } 453 454 455 private void initGestureDetector() { 456 mGestureDetector = new GestureDetector(getContext(), new GestureDetector.SimpleOnGestureListener() { 457 @Override 458 public boolean onFling(MotionEvent me1, MotionEvent me2, 459 float velocityX, float velocityY) { 460 if (mPossiblePoly) return false; 461 final float absX = Math.abs(velocityX); 462 final float absY = Math.abs(velocityY); 463 float deltaX = me2.getX() - me1.getX(); 464 float deltaY = me2.getY() - me1.getY(); 465 int travelX = getWidth() / 2; // Half the keyboard width 466 int travelY = getHeight() / 2; // Half the keyboard height 467 mSwipeTracker.computeCurrentVelocity(1000); 468 final float endingVelocityX = mSwipeTracker.getXVelocity(); 469 final float endingVelocityY = mSwipeTracker.getYVelocity(); 470 boolean sendDownKey = false; 471 if (velocityX > mSwipeThreshold && absY < absX && deltaX > travelX) { 472 if (mDisambiguateSwipe && endingVelocityX < velocityX / 4) { 473 sendDownKey = true; 474 } else { 475 swipeRight(); 476 return true; 477 } 478 } else if (velocityX < -mSwipeThreshold && absY < absX && deltaX < -travelX) { 479 if (mDisambiguateSwipe && endingVelocityX > velocityX / 4) { 480 sendDownKey = true; 481 } else { 482 swipeLeft(); 483 return true; 484 } 485 } else if (velocityY < -mSwipeThreshold && absX < absY && deltaY < -travelY) { 486 if (mDisambiguateSwipe && endingVelocityY > velocityY / 4) { 487 sendDownKey = true; 488 } else { 489 swipeUp(); 490 return true; 491 } 492 } else if (velocityY > mSwipeThreshold && absX < absY / 2 && deltaY > travelY) { 493 if (mDisambiguateSwipe && endingVelocityY < velocityY / 4) { 494 sendDownKey = true; 495 } else { 496 swipeDown(); 497 return true; 498 } 499 } 500 501 if (sendDownKey) { 502 detectAndSendKey(mDownKey, mStartX, mStartY, me1.getEventTime()); 503 } 504 return false; 505 } 506 }); 507 508 mGestureDetector.setIsLongpressEnabled(false); 509 } 510 511 public void setOnKeyboardActionListener(OnKeyboardActionListener listener) { 512 mKeyboardActionListener = listener; 513 } 514 515 /** 516 * Returns the {@link OnKeyboardActionListener} object. 517 * @return the listener attached to this keyboard 518 */ 519 protected OnKeyboardActionListener getOnKeyboardActionListener() { 520 return mKeyboardActionListener; 521 } 522 523 /** 524 * Attaches a keyboard to this view. The keyboard can be switched at any time and the 525 * view will re-layout itself to accommodate the keyboard. 526 * @see android.inputmethodservice.Keyboard 527 * @see #getKeyboard() 528 * @param keyboard the keyboard to display in this view 529 */ 530 public void setKeyboard(Keyboard keyboard, Locale locale) { 531 if (mKeyboard != null) { 532 showPreview(NOT_A_KEY); 533 } 534 // Remove any pending messages 535 removeMessages(); 536 mKeyboard = keyboard; 537 List<Key> keys = mKeyboard.getKeys(); 538 mKeys = keys.toArray(new Key[keys.size()]); 539 requestLayout(); 540 // Hint to reallocate the buffer if the size changed 541 mKeyboardChanged = true; 542 invalidateAllKeys(); 543 computeProximityThreshold(keyboard); 544 mMiniKeyboardCache.clear(); // Not really necessary to do every time, but will free up views 545 // Switching to a different keyboard should abort any pending keys so that the key up 546 // doesn't get delivered to the old or new keyboard 547 mAbortKey = true; // Until the next ACTION_DOWN 548 mLocale = locale; 549 } 550 551 /** 552 * Returns the current keyboard being displayed by this view. 553 * @return the currently attached keyboard 554 * @see #setKeyboard(android.inputmethodservice.Keyboard, java.util.Locale) 555 */ 556 public Keyboard getKeyboard() { 557 return mKeyboard; 558 } 559 560 /** 561 * Sets the state of the shift key of the keyboard, if any. 562 * @param shifted whether or not to enable the state of the shift key 563 * @return true if the shift key state changed, false if there was no change 564 * @see KeyboardView#isShifted() 565 */ 566 public boolean setShifted(boolean shifted) { 567 if (mKeyboard != null) { 568 if (mKeyboard.setShifted(shifted)) { 569 // The whole keyboard probably needs to be redrawn 570 invalidateAllKeys(); 571 return true; 572 } 573 } 574 return false; 575 } 576 577 /** 578 * Returns the state of the shift key of the keyboard, if any. 579 * @return true if the shift is in a pressed state, false otherwise. If there is 580 * no shift key on the keyboard or there is no keyboard attached, it returns false. 581 * @see KeyboardView#setShifted(boolean) 582 */ 583 public boolean isShifted() { 584 if (mKeyboard != null) { 585 return mKeyboard.isShifted(); 586 } 587 return false; 588 } 589 590 /** 591 * Enables or disables the key feedback popup. This is a popup that shows a magnified 592 * version of the depressed key. By default the preview is enabled. 593 * @param previewEnabled whether or not to enable the key feedback popup 594 * @see #isPreviewEnabled() 595 */ 596 public void setPreviewEnabled(boolean previewEnabled) { 597 mShowPreview = previewEnabled; 598 } 599 600 /** 601 * Returns the enabled state of the key feedback popup. 602 * @return whether or not the key feedback popup is enabled 603 * @see #setPreviewEnabled(boolean) 604 */ 605 public boolean isPreviewEnabled() { 606 return mShowPreview; 607 } 608 609 public void setPopupParent(View v) { 610 mPopupParent = v; 611 } 612 613 public void setPopupOffset(int x, int y) { 614 mMiniKeyboardOffsetX = x; 615 mMiniKeyboardOffsetY = y; 616 if (mPreviewPopup.isShowing()) { 617 mPreviewPopup.dismiss(); 618 } 619 } 620 621 /** 622 * When enabled, calls to {@link OnKeyboardActionListener#onKey} will include key 623 * codes for adjacent keys. When disabled, only the primary key code will be 624 * reported. 625 * @param enabled whether or not the proximity correction is enabled 626 */ 627 public void setProximityCorrectionEnabled(boolean enabled) { 628 mProximityCorrectOn = enabled; 629 } 630 631 /** 632 * Returns true if proximity correction is enabled. 633 */ 634 public boolean isProximityCorrectionEnabled() { 635 return mProximityCorrectOn; 636 } 637 638 public boolean getUseSecondaryColor() { 639 return mUseSecondaryColor; 640 } 641 642 public void setUseSecondaryColor(boolean useSecondaryColor) { 643 mUseSecondaryColor = useSecondaryColor; 644 } 645 646 /** 647 * Popup keyboard close button clicked. 648 * @hide 649 */ 650 @Override 651 public void onClick(View v) { 652 dismissPopupKeyboard(); 653 } 654 655 private CharSequence adjustCase(CharSequence label) { 656 if (mKeyboard.isShifted() && label != null && label.length() < 3 657 && Character.isLowerCase(label.charAt(0))) { 658 label = label.toString().toUpperCase(mLocale); 659 } 660 return label; 661 } 662 663 @Override 664 public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 665 // Round up a little 666 if (mKeyboard == null) { 667 setMeasuredDimension(getPaddingLeft() + getPaddingRight(), getPaddingTop() + getPaddingBottom()); 668 } else { 669 int width = mKeyboard.getMinWidth() + getPaddingLeft() + getPaddingRight(); 670 if (MeasureSpec.getSize(widthMeasureSpec) < width + 10) { 671 width = MeasureSpec.getSize(widthMeasureSpec); 672 } 673 setMeasuredDimension(width, mKeyboard.getHeight() + getPaddingTop() + getPaddingBottom()); 674 } 675 } 676 677 /** 678 * Compute the average distance between adjacent keys (horizontally and vertically) 679 * and square it to get the proximity threshold. We use a square here and in computing 680 * the touch distance from a key's center to avoid taking a square root. 681 * @param keyboard 682 */ 683 private void computeProximityThreshold(Keyboard keyboard) { 684 if (keyboard == null) return; 685 final Key[] keys = mKeys; 686 if (keys == null) return; 687 int length = keys.length; 688 int dimensionSum = 0; 689 for (int i = 0; i < length; i++) { 690 Key key = keys[i]; 691 dimensionSum += Math.min(key.width, key.height) + key.gap; 692 } 693 if (dimensionSum < 0 || length == 0) return; 694 mProximityThreshold = (int) (dimensionSum * 1.4f / length); 695 mProximityThreshold *= mProximityThreshold; // Square it 696 } 697 698 @Override 699 public void onSizeChanged(int w, int h, int oldw, int oldh) { 700 super.onSizeChanged(w, h, oldw, oldh); 701 if (mKeyboard != null) { 702 //TODO(ftamp): mKeyboard.resize(w, h); 703 } 704 // Release the buffer, if any and it will be reallocated on the next draw 705 mBuffer = null; 706 } 707 708 @Override 709 public void onDraw(Canvas canvas) { 710 super.onDraw(canvas); 711 if (mDrawPending || mBuffer == null || mKeyboardChanged) { 712 onBufferDraw(); 713 } 714 canvas.drawBitmap(mBuffer, 0, 0, null); 715 } 716 717 @SuppressWarnings("unused") 718 private void onBufferDraw() { 719 if (mBuffer == null || mKeyboardChanged) { 720 if (mBuffer == null || mKeyboardChanged && 721 (mBuffer.getWidth() != getWidth() || mBuffer.getHeight() != getHeight())) { 722 // Make sure our bitmap is at least 1x1 723 final int width = Math.max(1, getWidth()); 724 final int height = Math.max(1, getHeight()); 725 mBuffer = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888); 726 mCanvas = new Canvas(mBuffer); 727 } 728 invalidateAllKeys(); 729 mKeyboardChanged = false; 730 } 731 final Canvas canvas = mCanvas; 732 canvas.clipRect(mDirtyRect, Op.REPLACE); 733 734 if (mKeyboard == null) return; 735 736 final Paint paint = mPaint; 737 final Drawable keyBackground = mKeyBackground; 738 final Rect clipRegion = mClipRegion; 739 final Rect padding = mPadding; 740 final int kbdPaddingLeft = getPaddingLeft(); 741 final int kbdPaddingTop = getPaddingTop(); 742 final Key[] keys = mKeys; 743 final Key invalidKey = mInvalidatedKey; 744 745 paint.setColor(mKeyTextColorPrimary); 746 boolean drawSingleKey = false; 747 if (invalidKey != null && canvas.getClipBounds(clipRegion)) { 748 // Is clipRegion completely contained within the invalidated key? 749 if (invalidKey.x + kbdPaddingLeft - 1 <= clipRegion.left && 750 invalidKey.y + kbdPaddingTop - 1 <= clipRegion.top && 751 invalidKey.x + invalidKey.width + kbdPaddingLeft + 1 >= clipRegion.right && 752 invalidKey.y + invalidKey.height + kbdPaddingTop + 1 >= clipRegion.bottom) { 753 drawSingleKey = true; 754 } 755 } 756 canvas.drawColor(0x00000000, PorterDuff.Mode.CLEAR); 757 758 // Animate in translation. No overall translation for animating out. 759 float offset = getWidth()/2 * (1 - mAnimateInValue); 760 canvas.translate(offset, 0); 761 762 // Draw background. 763 float backgroundWidth = getWidth() * (mAnimateInValue - mAnimateOutValue); 764 paint.setColor(mBackgroundColor); 765 int center; 766 if (mLastSentIndex != NOT_A_KEY && mLastSentIndex < keys.length) { 767 center = keys[mLastSentIndex].x + keys[mLastSentIndex].width / 2; 768 } else { 769 center = getWidth()/2; 770 } 771 canvas.drawRect(mAnimateOutValue * center, 0, mAnimateOutValue * center + backgroundWidth, 772 getHeight(), paint); 773 final int keyCount = keys.length; 774 for (int i = 0; i < keyCount; i++) { 775 final Key key = keys[i]; 776 if (drawSingleKey && invalidKey != key) { 777 continue; 778 } 779 int[] drawableState = key.getCurrentDrawableState(); 780 keyBackground.setState(drawableState); 781 if (key.icon != null) { 782 key.icon.setState(drawableState); 783 } 784 785 786 // Switch the character to uppercase if shift is pressed 787 String label = key.label == null? null : adjustCase(key.label).toString(); 788 789 final Rect bounds = keyBackground.getBounds(); 790 if (key.width != bounds.right || 791 key.height != bounds.bottom) { 792 keyBackground.setBounds(0, 0, key.width, key.height); 793 } 794 float animateOutOffset = 0; 795 if (mAnimateOutValue != MIN_ANIMATION_VALUE) { 796 animateOutOffset = (center - key.x - key.width/2) * mAnimateOutValue; 797 } 798 canvas.translate(key.x + kbdPaddingLeft + animateOutOffset, key.y + kbdPaddingTop); 799 keyBackground.draw(canvas); 800 801 if (label != null && label.length() > 0) { 802 // Use primary color for letters and digits, secondary color for everything else 803 if (Character.isLetterOrDigit(label.charAt(0))) { 804 paint.setColor(mKeyTextColorPrimary); 805 } else if (mUseSecondaryColor) { 806 paint.setColor(mKeyTextColorSecondary); 807 } 808 // For characters, use large font. For labels like "Done", use small font. 809 if (label.length() > 1 && key.codes.length < 2) { 810 paint.setTextSize(mLabelTextSize); 811 } else if (isPunctuation(label)) { 812 paint.setTextSize(mKeyPunctuationSize); 813 } else { 814 paint.setTextSize(mKeyTextSize); 815 } 816 if (mAnimateInValue != MAX_ANIMATION_VALUE) { 817 int alpha = 818 (int) ((backgroundWidth - key.x - key.width) / key.width * MAX_ALPHA); 819 if (alpha > MAX_ALPHA) { 820 alpha = MAX_ALPHA; 821 } else if (alpha < 0) { 822 alpha = 0; 823 } 824 paint.setAlpha(alpha); 825 } else if (mAnimateOutValue != MIN_ANIMATION_VALUE) { 826 int alpha; 827 if (i == mLastSentIndex) { 828 // Fade out selected character from 1/2 to 3/4 of animate out. 829 alpha = (int) ((3 - mAnimateOutValue * 4) * MAX_ALPHA); 830 } else { 831 // Fade out the rest from start to 1/2 of animate out. 832 alpha = (int) ((1 - mAnimateOutValue * 2) * MAX_ALPHA); 833 } 834 if (alpha > MAX_ALPHA) { 835 alpha = MAX_ALPHA; 836 } else if (alpha < 0) { 837 alpha = 0; 838 } 839 paint.setAlpha(alpha); 840 } 841 // Draw the text 842 canvas.drawText(label, 843 (key.width - padding.left - padding.right) / 2 844 + padding.left, 845 (key.height - padding.top - padding.bottom) / 2 846 + (paint.getTextSize() - paint.descent()) / 2 + padding.top, 847 paint); 848 // Turn off drop shadow 849 paint.setShadowLayer(0, 0, 0, 0); 850 } else if (key.icon != null) { 851 final int drawableX = (key.width - padding.left - padding.right 852 - key.icon.getIntrinsicWidth()) / 2 + padding.left; 853 final int drawableY = (key.height - padding.top - padding.bottom 854 - key.icon.getIntrinsicHeight()) / 2 + padding.top; 855 canvas.translate(drawableX, drawableY); 856 key.icon.setBounds(0, 0, 857 key.icon.getIntrinsicWidth(), key.icon.getIntrinsicHeight()); 858 key.icon.draw(canvas); 859 canvas.translate(-drawableX, -drawableY); 860 } 861 canvas.translate(-key.x - kbdPaddingLeft - animateOutOffset, -key.y - kbdPaddingTop); 862 } 863 mInvalidatedKey = null; 864 // Overlay a dark rectangle to dim the keyboard 865 paint.setColor(mPopupScrimColor); 866 paint.setAlpha(mScrimAlpha); 867 canvas.drawRect(0, 0, getWidth(), getHeight(), paint); 868 canvas.translate(-offset, 0); 869 870 if (DEBUG && mShowTouchPoints) { 871 paint.setAlpha(128); 872 paint.setColor(0xFFFF0000); 873 canvas.drawCircle(mStartX, mStartY, 3, paint); 874 canvas.drawLine(mStartX, mStartY, mLastX, mLastY, paint); 875 paint.setColor(0xFF0000FF); 876 canvas.drawCircle(mLastX, mLastY, 3, paint); 877 paint.setColor(0xFF00FF00); 878 canvas.drawCircle((mStartX + mLastX) / 2, (mStartY + mLastY) / 2, 2, paint); 879 } 880 881 mDrawPending = false; 882 mDirtyRect.setEmpty(); 883 } 884 885 private boolean isPunctuation(String label) { 886 return PUNCTUATION_PATTERN.matcher(label).matches(); 887 } 888 889 private int getKeyIndices(int x, int y, int[] allKeys) { 890 final Key[] keys = mKeys; 891 int primaryIndex = NOT_A_KEY; 892 int closestKey = NOT_A_KEY; 893 int closestKeyDist = mProximityThreshold + 1; 894 Arrays.fill(mDistances, Integer.MAX_VALUE); 895 int [] nearestKeyIndices = mKeyboard.getNearestKeys(x, y); 896 final int keyCount = nearestKeyIndices.length; 897 for (int i = 0; i < keyCount; i++) { 898 final Key key = keys[nearestKeyIndices[i]]; 899 int dist = 0; 900 boolean isInside = key.isInside(x,y); 901 if (isInside) { 902 primaryIndex = nearestKeyIndices[i]; 903 } 904 905 if (((mProximityCorrectOn 906 && (dist = key.squaredDistanceFrom(x, y)) < mProximityThreshold) 907 || isInside) 908 && key.codes[0] > 32) { 909 // Find insertion point 910 final int nCodes = key.codes.length; 911 if (dist < closestKeyDist) { 912 closestKeyDist = dist; 913 closestKey = nearestKeyIndices[i]; 914 } 915 916 if (allKeys == null) continue; 917 918 for (int j = 0; j < mDistances.length; j++) { 919 if (mDistances[j] > dist) { 920 // Make space for nCodes codes 921 System.arraycopy(mDistances, j, mDistances, j + nCodes, 922 mDistances.length - j - nCodes); 923 System.arraycopy(allKeys, j, allKeys, j + nCodes, 924 allKeys.length - j - nCodes); 925 for (int c = 0; c < nCodes; c++) { 926 allKeys[j + c] = key.codes[c]; 927 mDistances[j + c] = dist; 928 } 929 break; 930 } 931 } 932 } 933 } 934 if (primaryIndex == NOT_A_KEY) { 935 primaryIndex = closestKey; 936 } 937 return primaryIndex; 938 } 939 940 private void detectAndSendKey(int index, int x, int y, long eventTime) { 941 if (index != NOT_A_KEY && index < mKeys.length) { 942 final Key key = mKeys[index]; 943 if (key.text != null) { 944 mKeyboardActionListener.onText(key.text); 945 mKeyboardActionListener.onRelease(NOT_A_KEY); 946 } else { 947 int code = key.codes[0]; 948 //TextEntryState.keyPressedAt(key, x, y); 949 int[] codes = new int[MAX_NEARBY_KEYS]; 950 Arrays.fill(codes, NOT_A_KEY); 951 getKeyIndices(x, y, codes); 952 // Multi-tap 953 if (mInMultiTap) { 954 if (mTapCount != -1) { 955 mKeyboardActionListener.onKey(Keyboard.KEYCODE_DELETE, KEY_DELETE); 956 } else { 957 mTapCount = 0; 958 } 959 code = key.codes[mTapCount]; 960 } 961 mKeyboardActionListener.onKey(code, codes); 962 mKeyboardActionListener.onRelease(code); 963 } 964 mLastSentIndex = index; 965 mLastTapTime = eventTime; 966 } 967 } 968 969 /** 970 * Handle multi-tap keys by producing the key label for the current multi-tap state. 971 */ 972 private CharSequence getPreviewText(Key key) { 973 if (mInMultiTap) { 974 // Multi-tap 975 mPreviewLabel.setLength(0); 976 mPreviewLabel.append((char) key.codes[mTapCount < 0 ? 0 : mTapCount]); 977 return adjustCase(mPreviewLabel); 978 } else { 979 return adjustCase(key.label); 980 } 981 } 982 983 private void showPreview(int keyIndex) { 984 int oldKeyIndex = mCurrentKeyIndex; 985 final PopupWindow previewPopup = mPreviewPopup; 986 987 mCurrentKeyIndex = keyIndex; 988 // Release the old key and press the new key 989 final Key[] keys = mKeys; 990 if (oldKeyIndex != mCurrentKeyIndex) { 991 if (oldKeyIndex != NOT_A_KEY && keys.length > oldKeyIndex) { 992 Key oldKey = keys[oldKeyIndex]; 993 // Keyboard.Key.onReleased(boolean) should be called here, but due to b/21446448, 994 // onReleased doesn't check the input param and it always toggles the on state. 995 // Therefore we need to just set the pressed state to false here. 996 oldKey.pressed = false; 997 invalidateKey(oldKeyIndex); 998 } 999 if (mCurrentKeyIndex != NOT_A_KEY && keys.length > mCurrentKeyIndex) { 1000 Key newKey = keys[mCurrentKeyIndex]; 1001 newKey.onPressed(); 1002 invalidateKey(mCurrentKeyIndex); 1003 } 1004 } 1005 // If key changed and preview is on ... 1006 if (oldKeyIndex != mCurrentKeyIndex && mShowPreview) { 1007 mHandler.removeMessages(MSG_SHOW_PREVIEW); 1008 if (previewPopup.isShowing()) { 1009 if (keyIndex == NOT_A_KEY) { 1010 mHandler.sendMessageDelayed(mHandler 1011 .obtainMessage(MSG_REMOVE_PREVIEW), 1012 DELAY_AFTER_PREVIEW); 1013 } 1014 } 1015 if (keyIndex != NOT_A_KEY) { 1016 if (previewPopup.isShowing() && mPreviewText.getVisibility() == VISIBLE) { 1017 // Show right away, if it's already visible and finger is moving around 1018 showKey(keyIndex); 1019 } else { 1020 mHandler.sendMessageDelayed( 1021 mHandler.obtainMessage(MSG_SHOW_PREVIEW, keyIndex, 0), 1022 DELAY_BEFORE_PREVIEW); 1023 } 1024 } 1025 } 1026 } 1027 1028 private void showKey(final int keyIndex) { 1029 final PopupWindow previewPopup = mPreviewPopup; 1030 final Key[] keys = mKeys; 1031 if (keyIndex < 0 || keyIndex >= mKeys.length) return; 1032 Key key = keys[keyIndex]; 1033 if (key.icon != null) { 1034 mPreviewText.setCompoundDrawables(null, null, null, 1035 key.iconPreview != null ? key.iconPreview : key.icon); 1036 mPreviewText.setText(null); 1037 } else { 1038 mPreviewText.setCompoundDrawables(null, null, null, null); 1039 mPreviewText.setText(getPreviewText(key)); 1040 if (key.label.length() > 1 && key.codes.length < 2) { 1041 mPreviewText.setTextSize(TypedValue.COMPLEX_UNIT_PX, mKeyTextSize); 1042 mPreviewText.setTypeface(Typeface.DEFAULT_BOLD); 1043 } else { 1044 mPreviewText.setTextSize(TypedValue.COMPLEX_UNIT_PX, mPreviewTextSizeLarge); 1045 mPreviewText.setTypeface(Typeface.DEFAULT); 1046 } 1047 } 1048 mPreviewText.measure(MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED), 1049 MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED)); 1050 int popupWidth = Math.max(mPreviewText.getMeasuredWidth(), key.width 1051 + mPreviewText.getPaddingLeft() + mPreviewText.getPaddingRight()); 1052 final int popupHeight = mPreviewHeight; 1053 LayoutParams lp = mPreviewText.getLayoutParams(); 1054 if (lp != null) { 1055 lp.width = popupWidth; 1056 lp.height = popupHeight; 1057 } 1058 if (!mPreviewCentered) { 1059 mPopupPreviewX = key.x - mPreviewText.getPaddingLeft() + getPaddingLeft(); 1060 mPopupPreviewY = key.y - popupHeight + mPreviewOffset; 1061 } else { 1062 // TODO: Fix this if centering is brought back 1063 mPopupPreviewX = 160 - mPreviewText.getMeasuredWidth() / 2; 1064 mPopupPreviewY = - mPreviewText.getMeasuredHeight(); 1065 } 1066 mHandler.removeMessages(MSG_REMOVE_PREVIEW); 1067 getLocationInWindow(mCoordinates); 1068 mCoordinates[0] += mMiniKeyboardOffsetX; // Offset may be zero 1069 mCoordinates[1] += mMiniKeyboardOffsetY; // Offset may be zero 1070 1071 // Set the preview background state 1072 /* 1073 mPreviewText.getBackground().setState( 1074 key.popupResId != 0 ? LONG_PRESSABLE_STATE_SET : EMPTY_STATE_SET); 1075 */ 1076 mPopupPreviewX += mCoordinates[0]; 1077 mPopupPreviewY += mCoordinates[1]; 1078 1079 // If the popup cannot be shown above the key, put it on the side 1080 getLocationOnScreen(mCoordinates); 1081 if (mPopupPreviewY + mCoordinates[1] < 0) { 1082 // If the key you're pressing is on the left side of the keyboard, show the popup on 1083 // the right, offset by enough to see at least one key to the left/right. 1084 if (key.x + key.width <= getWidth() / 2) { 1085 mPopupPreviewX += (int) (key.width * 2.5); 1086 } else { 1087 mPopupPreviewX -= (int) (key.width * 2.5); 1088 } 1089 mPopupPreviewY += popupHeight; 1090 } 1091 1092 if (previewPopup.isShowing()) { 1093 previewPopup.update(mPopupPreviewX, mPopupPreviewY, 1094 popupWidth, popupHeight); 1095 } else { 1096 previewPopup.setWidth(popupWidth); 1097 previewPopup.setHeight(popupHeight); 1098 previewPopup.showAtLocation(mPopupParent, Gravity.NO_GRAVITY, 1099 mPopupPreviewX, mPopupPreviewY); 1100 } 1101 mPreviewText.setVisibility(VISIBLE); 1102 } 1103 1104 /** 1105 * Requests a redraw of the entire keyboard. Calling {@link #invalidate} is not sufficient 1106 * because the keyboard renders the keys to an off-screen buffer and an invalidate() only 1107 * draws the cached buffer. 1108 * @see #invalidateKey(int) 1109 */ 1110 public void invalidateAllKeys() { 1111 mDirtyRect.union(0, 0, getWidth(), getHeight()); 1112 mDrawPending = true; 1113 invalidate(); 1114 } 1115 1116 /** 1117 * Invalidates a key so that it will be redrawn on the next repaint. Use this method if only 1118 * one key is changing it's content. Any changes that affect the position or size of the key 1119 * may not be honored. 1120 * @param keyIndex the index of the key in the attached {@link android.inputmethodservice.Keyboard}. 1121 * @see #invalidateAllKeys 1122 */ 1123 public void invalidateKey(int keyIndex) { 1124 if (mKeys == null) return; 1125 if (keyIndex < 0 || keyIndex >= mKeys.length) { 1126 return; 1127 } 1128 final Key key = mKeys[keyIndex]; 1129 mInvalidatedKey = key; 1130 mDirtyRect.union(key.x + getPaddingLeft(), key.y + getPaddingTop(), 1131 key.x + key.width + getPaddingLeft(), key.y + key.height + getPaddingTop()); 1132 onBufferDraw(); 1133 invalidate(key.x + getPaddingLeft(), key.y + getPaddingTop(), 1134 key.x + key.width + getPaddingLeft(), key.y + key.height + getPaddingTop()); 1135 } 1136 1137 private void openPopupIfRequired(MotionEvent unused) { 1138 // Check if we have a popup keyboard first. 1139 if (mPopupKeyboardView == null || mCurrentKey < 0 || mCurrentKey >= mKeys.length) { 1140 return; 1141 } 1142 1143 Key popupKey = mKeys[mCurrentKey]; 1144 boolean result = onLongPress(popupKey); 1145 if (result) { 1146 mAbortKey = true; 1147 showPreview(NOT_A_KEY); 1148 } 1149 } 1150 1151 /** 1152 * Called when a key is long pressed. By default this will open any popup keyboard associated 1153 * with this key through the attributes popupLayout and popupCharacters. 1154 * 1155 * @param popupKey the key that was long pressed 1156 * @return true if the long press is handled, false otherwise. Subclasses should call the 1157 * method on the base class if the subclass doesn't wish to handle the call. 1158 */ 1159 protected boolean onLongPress(Key popupKey) { 1160 int popupKeyboardId = popupKey.popupResId; 1161 1162 if (popupKeyboardId != 0) { 1163 Keyboard keyboard; 1164 if (popupKey.popupCharacters != null) { 1165 keyboard = new Keyboard(getContext(), popupKeyboardId, 1166 popupKey.popupCharacters, -1, getPaddingLeft() + getPaddingRight()); 1167 } else { 1168 keyboard = new Keyboard(getContext(), popupKeyboardId); 1169 } 1170 mPopupKeyboardView.setKeyboard(keyboard, mLocale); 1171 mPopupKeyboardView.setVisibility(VISIBLE); 1172 mPopupKeyboardView.setShifted(isShifted()); 1173 mPopupKeyboardView.mAnimateInAnimator.start(); 1174 mPopupKeyboardView.mLastSentIndex = NOT_A_KEY; 1175 mScrimAlphaAnimator.setStartDelay(0); 1176 mScrimAlphaAnimator.start(); 1177 mPopupKeyboardView.invalidate(); 1178 mPopupKeyboardOnScreen = true; 1179 invalidateAllKeys(); 1180 return true; 1181 } 1182 return false; 1183 } 1184 1185 @Override 1186 public boolean onHoverEvent(MotionEvent event) { 1187 if (mAccessibilityManager.isTouchExplorationEnabled() && event.getPointerCount() == 1) { 1188 final int action = event.getAction(); 1189 switch (action) { 1190 case MotionEvent.ACTION_HOVER_ENTER: { 1191 event.setAction(MotionEvent.ACTION_DOWN); 1192 } break; 1193 case MotionEvent.ACTION_HOVER_MOVE: { 1194 event.setAction(MotionEvent.ACTION_MOVE); 1195 } break; 1196 case MotionEvent.ACTION_HOVER_EXIT: { 1197 event.setAction(MotionEvent.ACTION_UP); 1198 } break; 1199 } 1200 return onTouchEvent(event); 1201 } 1202 return true; 1203 } 1204 1205 @SuppressLint("ClickableViewAccessibility") 1206 @Override 1207 public boolean onTouchEvent(MotionEvent me) { 1208 // Don't process touches while animating. 1209 if (mAnimateInValue != MAX_ANIMATION_VALUE || mAnimateOutValue != MIN_ANIMATION_VALUE) { 1210 return false; 1211 } 1212 1213 // Convert multi-pointer up/down events to single up/down events to 1214 // deal with the typical multi-pointer behavior of two-thumb typing 1215 final int pointerCount = me.getPointerCount(); 1216 final int action = me.getAction(); 1217 boolean result = false; 1218 final long now = me.getEventTime(); 1219 1220 if (pointerCount != mOldPointerCount) { 1221 if (pointerCount == 1) { 1222 // Send a down event for the latest pointer 1223 MotionEvent down = MotionEvent.obtain(now, now, MotionEvent.ACTION_DOWN, 1224 me.getX(), me.getY(), me.getMetaState()); 1225 result = onModifiedTouchEvent(down, false); 1226 down.recycle(); 1227 // If it's an up action, then deliver the up as well. 1228 if (action == MotionEvent.ACTION_UP) { 1229 result = onModifiedTouchEvent(me, true); 1230 } 1231 } else { 1232 // Send an up event for the last pointer 1233 MotionEvent up = MotionEvent.obtain(now, now, MotionEvent.ACTION_UP, 1234 mOldPointerX, mOldPointerY, me.getMetaState()); 1235 result = onModifiedTouchEvent(up, true); 1236 up.recycle(); 1237 } 1238 } else { 1239 if (pointerCount == 1) { 1240 result = onModifiedTouchEvent(me, false); 1241 mOldPointerX = me.getX(); 1242 mOldPointerY = me.getY(); 1243 } else { 1244 // Don't do anything when 2 pointers are down and moving. 1245 result = true; 1246 } 1247 } 1248 mOldPointerCount = pointerCount; 1249 1250 return result; 1251 } 1252 1253 private boolean onModifiedTouchEvent(MotionEvent me, boolean possiblePoly) { 1254 int touchX = (int) me.getX() - getPaddingLeft(); 1255 int touchY = (int) me.getY() - getPaddingTop(); 1256 if (touchY >= -mVerticalCorrection) 1257 touchY += mVerticalCorrection; 1258 final int action = me.getAction(); 1259 final long eventTime = me.getEventTime(); 1260 int keyIndex = getKeyIndices(touchX, touchY, null); 1261 mPossiblePoly = possiblePoly; 1262 1263 // Track the last few movements to look for spurious swipes. 1264 if (action == MotionEvent.ACTION_DOWN) mSwipeTracker.clear(); 1265 mSwipeTracker.addMovement(me); 1266 1267 // Ignore all motion events until a DOWN. 1268 if (mAbortKey 1269 && action != MotionEvent.ACTION_DOWN && action != MotionEvent.ACTION_CANCEL) { 1270 return true; 1271 } 1272 1273 if (mGestureDetector.onTouchEvent(me)) { 1274 showPreview(NOT_A_KEY); 1275 mHandler.removeMessages(MSG_REPEAT); 1276 mHandler.removeMessages(MSG_LONGPRESS); 1277 return true; 1278 } 1279 1280 if (mPopupKeyboardOnScreen) { 1281 dismissPopupKeyboard(); 1282 return true; 1283 } 1284 1285 switch (action) { 1286 case MotionEvent.ACTION_DOWN: 1287 mAbortKey = false; 1288 mStartX = touchX; 1289 mStartY = touchY; 1290 mLastCodeX = touchX; 1291 mLastCodeY = touchY; 1292 mLastKeyTime = 0; 1293 mCurrentKeyTime = 0; 1294 mLastKey = NOT_A_KEY; 1295 mCurrentKey = keyIndex; 1296 mDownKey = keyIndex; 1297 mDownTime = me.getEventTime(); 1298 mLastMoveTime = mDownTime; 1299 checkMultiTap(eventTime, keyIndex); 1300 if (keyIndex != NOT_A_KEY) { 1301 mKeyboardActionListener.onPress(mKeys[keyIndex].codes[0]); 1302 } 1303 if (mCurrentKey >= 0 && mKeys[mCurrentKey].repeatable) { 1304 mRepeatKeyIndex = mCurrentKey; 1305 Message msg = mHandler.obtainMessage(MSG_REPEAT); 1306 mHandler.sendMessageDelayed(msg, REPEAT_START_DELAY); 1307 repeatKey(); 1308 // Delivering the key could have caused an abort 1309 if (mAbortKey) { 1310 mRepeatKeyIndex = NOT_A_KEY; 1311 break; 1312 } 1313 } 1314 if (mCurrentKey != NOT_A_KEY) { 1315 Message msg = mHandler.obtainMessage(MSG_LONGPRESS, me); 1316 mHandler.sendMessageDelayed(msg, LONGPRESS_TIMEOUT); 1317 } 1318 showPreview(keyIndex); 1319 break; 1320 1321 case MotionEvent.ACTION_MOVE: 1322 boolean continueLongPress = false; 1323 if (keyIndex != NOT_A_KEY) { 1324 if (mCurrentKey == NOT_A_KEY) { 1325 mCurrentKey = keyIndex; 1326 mCurrentKeyTime = eventTime - mDownTime; 1327 } else { 1328 if (keyIndex == mCurrentKey) { 1329 mCurrentKeyTime += eventTime - mLastMoveTime; 1330 continueLongPress = true; 1331 } else if (mRepeatKeyIndex == NOT_A_KEY) { 1332 resetMultiTap(); 1333 mLastKey = mCurrentKey; 1334 mLastCodeX = mLastX; 1335 mLastCodeY = mLastY; 1336 mLastKeyTime = 1337 mCurrentKeyTime + eventTime - mLastMoveTime; 1338 mCurrentKey = keyIndex; 1339 mCurrentKeyTime = 0; 1340 } 1341 } 1342 } 1343 if (!continueLongPress) { 1344 // Cancel old longpress 1345 mHandler.removeMessages(MSG_LONGPRESS); 1346 // Start new longpress if key has changed 1347 if (keyIndex != NOT_A_KEY) { 1348 Message msg = mHandler.obtainMessage(MSG_LONGPRESS, me); 1349 mHandler.sendMessageDelayed(msg, LONGPRESS_TIMEOUT); 1350 } 1351 } 1352 showPreview(mCurrentKey); 1353 mLastMoveTime = eventTime; 1354 break; 1355 1356 case MotionEvent.ACTION_UP: 1357 removeMessages(); 1358 if (keyIndex == mCurrentKey) { 1359 mCurrentKeyTime += eventTime - mLastMoveTime; 1360 } else { 1361 resetMultiTap(); 1362 mLastKey = mCurrentKey; 1363 mLastKeyTime = mCurrentKeyTime + eventTime - mLastMoveTime; 1364 mCurrentKey = keyIndex; 1365 mCurrentKeyTime = 0; 1366 } 1367 if (mCurrentKeyTime < mLastKeyTime && mCurrentKeyTime < DEBOUNCE_TIME 1368 && mLastKey != NOT_A_KEY) { 1369 mCurrentKey = mLastKey; 1370 touchX = mLastCodeX; 1371 touchY = mLastCodeY; 1372 } 1373 showPreview(NOT_A_KEY); 1374 Arrays.fill(mKeyIndices, NOT_A_KEY); 1375 // If we're not on a repeating key (which sends on a DOWN event) 1376 if (mRepeatKeyIndex == NOT_A_KEY && !mPopupKeyboardOnScreen && !mAbortKey) { 1377 detectAndSendKey(mCurrentKey, touchX, touchY, eventTime); 1378 } 1379 invalidateKey(keyIndex); 1380 mRepeatKeyIndex = NOT_A_KEY; 1381 break; 1382 case MotionEvent.ACTION_CANCEL: 1383 removeMessages(); 1384 dismissPopupKeyboard(); 1385 mAbortKey = true; 1386 showPreview(NOT_A_KEY); 1387 invalidateKey(mCurrentKey); 1388 break; 1389 } 1390 mLastX = touchX; 1391 mLastY = touchY; 1392 return true; 1393 } 1394 1395 private boolean repeatKey() { 1396 Key key = mKeys[mRepeatKeyIndex]; 1397 detectAndSendKey(mCurrentKey, key.x, key.y, mLastTapTime); 1398 return true; 1399 } 1400 1401 protected void swipeRight() { 1402 mKeyboardActionListener.swipeRight(); 1403 } 1404 1405 protected void swipeLeft() { 1406 mKeyboardActionListener.swipeLeft(); 1407 } 1408 1409 protected void swipeUp() { 1410 mKeyboardActionListener.swipeUp(); 1411 } 1412 1413 protected void swipeDown() { 1414 mKeyboardActionListener.swipeDown(); 1415 } 1416 1417 public void closing() { 1418 if (mPreviewPopup.isShowing()) { 1419 mPreviewPopup.dismiss(); 1420 } 1421 removeMessages(); 1422 1423 dismissPopupKeyboard(); 1424 mBuffer = null; 1425 mCanvas = null; 1426 mMiniKeyboardCache.clear(); 1427 } 1428 1429 private void removeMessages() { 1430 mHandler.removeMessages(MSG_REPEAT); 1431 mHandler.removeMessages(MSG_LONGPRESS); 1432 mHandler.removeMessages(MSG_SHOW_PREVIEW); 1433 } 1434 1435 @Override 1436 public void onDetachedFromWindow() { 1437 super.onDetachedFromWindow(); 1438 closing(); 1439 } 1440 1441 public void dismissPopupKeyboard() { 1442 mPopupKeyboardOnScreen = false; 1443 if (mPopupKeyboardView != null && mPopupKeyboardView.getVisibility() == View.VISIBLE) { 1444 if (mPopupKeyboardView.mAnimateInValue == MAX_ANIMATION_VALUE) { 1445 mPopupKeyboardView.mAnimateOutAnimator.start(); 1446 mScrimAlphaAnimator.setStartDelay(ANIMATE_SCRIM_DELAY_MS); 1447 mScrimAlphaAnimator.reverse(); 1448 } else { 1449 mPopupKeyboardView.mAnimateInAnimator.reverse(); 1450 mScrimAlphaAnimator.setStartDelay(0); 1451 mScrimAlphaAnimator.reverse(); 1452 } 1453 } 1454 1455 invalidateAllKeys(); 1456 } 1457 1458 public void setPopupKeyboardView(KeyboardView popupKeyboardView) { 1459 mPopupKeyboardView = popupKeyboardView; 1460 mPopupKeyboardView.mBackgroundColor = getResources().getColor(R.color.car_teal_700); 1461 } 1462 1463 private void resetMultiTap() { 1464 mLastSentIndex = NOT_A_KEY; 1465 mTapCount = 0; 1466 mLastTapTime = -1; 1467 mInMultiTap = false; 1468 } 1469 1470 private void checkMultiTap(long eventTime, int keyIndex) { 1471 if (keyIndex == NOT_A_KEY) return; 1472 Key key = mKeys[keyIndex]; 1473 if (key.codes.length > 1) { 1474 mInMultiTap = true; 1475 if (eventTime < mLastTapTime + MULTITAP_INTERVAL 1476 && keyIndex == mLastSentIndex) { 1477 mTapCount = (mTapCount + 1) % key.codes.length; 1478 return; 1479 } else { 1480 mTapCount = -1; 1481 return; 1482 } 1483 } 1484 if (eventTime > mLastTapTime + MULTITAP_INTERVAL || keyIndex != mLastSentIndex) { 1485 resetMultiTap(); 1486 } 1487 } 1488 1489 @Override 1490 public boolean onGenericMotionEvent(MotionEvent event) { 1491 // Close the touch keyboard when the user scrolls. 1492 if (event.getActionMasked() == MotionEvent.ACTION_SCROLL) { 1493 mKeyboardActionListener.stopInput(); 1494 return true; 1495 } 1496 return false; 1497 } 1498 1499 private static class SwipeTracker { 1500 1501 static final int NUM_PAST = 4; 1502 static final int LONGEST_PAST_TIME = 200; 1503 1504 final float mPastX[] = new float[NUM_PAST]; 1505 final float mPastY[] = new float[NUM_PAST]; 1506 final long mPastTime[] = new long[NUM_PAST]; 1507 1508 float mYVelocity; 1509 float mXVelocity; 1510 1511 public void clear() { 1512 mPastTime[0] = 0; 1513 } 1514 1515 public void addMovement(MotionEvent ev) { 1516 long time = ev.getEventTime(); 1517 final int N = ev.getHistorySize(); 1518 for (int i=0; i<N; i++) { 1519 addPoint(ev.getHistoricalX(i), ev.getHistoricalY(i), 1520 ev.getHistoricalEventTime(i)); 1521 } 1522 addPoint(ev.getX(), ev.getY(), time); 1523 } 1524 1525 private void addPoint(float x, float y, long time) { 1526 int drop = -1; 1527 int i; 1528 final long[] pastTime = mPastTime; 1529 for (i=0; i<NUM_PAST; i++) { 1530 if (pastTime[i] == 0) { 1531 break; 1532 } else if (pastTime[i] < time-LONGEST_PAST_TIME) { 1533 drop = i; 1534 } 1535 } 1536 if (i == NUM_PAST && drop < 0) { 1537 drop = 0; 1538 } 1539 if (drop == i) drop--; 1540 final float[] pastX = mPastX; 1541 final float[] pastY = mPastY; 1542 if (drop >= 0) { 1543 final int start = drop+1; 1544 final int count = NUM_PAST-drop-1; 1545 System.arraycopy(pastX, start, pastX, 0, count); 1546 System.arraycopy(pastY, start, pastY, 0, count); 1547 System.arraycopy(pastTime, start, pastTime, 0, count); 1548 i -= (drop+1); 1549 } 1550 pastX[i] = x; 1551 pastY[i] = y; 1552 pastTime[i] = time; 1553 i++; 1554 if (i < NUM_PAST) { 1555 pastTime[i] = 0; 1556 } 1557 } 1558 1559 public void computeCurrentVelocity(int units) { 1560 computeCurrentVelocity(units, Float.MAX_VALUE); 1561 } 1562 1563 public void computeCurrentVelocity(int units, float maxVelocity) { 1564 final float[] pastX = mPastX; 1565 final float[] pastY = mPastY; 1566 final long[] pastTime = mPastTime; 1567 1568 final float oldestX = pastX[0]; 1569 final float oldestY = pastY[0]; 1570 final long oldestTime = pastTime[0]; 1571 float accumX = 0; 1572 float accumY = 0; 1573 int N=0; 1574 while (N < NUM_PAST) { 1575 if (pastTime[N] == 0) { 1576 break; 1577 } 1578 N++; 1579 } 1580 1581 for (int i=1; i < N; i++) { 1582 final int dur = (int)(pastTime[i] - oldestTime); 1583 if (dur == 0) continue; 1584 float dist = pastX[i] - oldestX; 1585 float vel = (dist/dur) * units; // pixels/frame. 1586 if (accumX == 0) accumX = vel; 1587 else accumX = (accumX + vel) * .5f; 1588 1589 dist = pastY[i] - oldestY; 1590 vel = (dist/dur) * units; // pixels/frame. 1591 if (accumY == 0) accumY = vel; 1592 else accumY = (accumY + vel) * .5f; 1593 } 1594 mXVelocity = accumX < 0.0f ? Math.max(accumX, -maxVelocity) 1595 : Math.min(accumX, maxVelocity); 1596 mYVelocity = accumY < 0.0f ? Math.max(accumY, -maxVelocity) 1597 : Math.min(accumY, maxVelocity); 1598 } 1599 1600 public float getXVelocity() { 1601 return mXVelocity; 1602 } 1603 1604 public float getYVelocity() { 1605 return mYVelocity; 1606 } 1607 } 1608 1609 private static class KeyboardHander extends Handler { 1610 private final WeakReference<KeyboardView> mKeyboardView; 1611 1612 public KeyboardHander(KeyboardView keyboardView) { 1613 mKeyboardView = new WeakReference<KeyboardView>(keyboardView); 1614 } 1615 1616 @Override 1617 public void handleMessage(Message msg) { 1618 KeyboardView keyboardView = mKeyboardView.get(); 1619 if (keyboardView != null) { 1620 switch (msg.what) { 1621 case MSG_SHOW_PREVIEW: 1622 keyboardView.showKey(msg.arg1); 1623 break; 1624 case MSG_REMOVE_PREVIEW: 1625 keyboardView.mPreviewText.setVisibility(INVISIBLE); 1626 break; 1627 case MSG_REPEAT: 1628 if (keyboardView.repeatKey()) { 1629 Message repeat = Message.obtain(this, MSG_REPEAT); 1630 sendMessageDelayed(repeat, REPEAT_INTERVAL); 1631 } 1632 break; 1633 case MSG_LONGPRESS: 1634 keyboardView.openPopupIfRequired((MotionEvent) msg.obj); 1635 break; 1636 } 1637 } 1638 } 1639 } 1640 } 1641
