1 /* 2 * Copyright (C) 2008-2009 Google Inc. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); you may not 5 * use this file except in compliance with the License. You may obtain a copy of 6 * 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, WITHOUT 12 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the 13 * License for the specific language governing permissions and limitations under 14 * the License. 15 */ 16 17 package android.inputmethodservice; 18 19 import android.content.Context; 20 import android.content.res.TypedArray; 21 import android.graphics.Bitmap; 22 import android.graphics.Canvas; 23 import android.graphics.Paint; 24 import android.graphics.Paint.Align; 25 import android.graphics.PorterDuff; 26 import android.graphics.Rect; 27 import android.graphics.Typeface; 28 import android.graphics.drawable.Drawable; 29 import android.inputmethodservice.Keyboard.Key; 30 import android.media.AudioManager; 31 import android.os.Handler; 32 import android.os.Message; 33 import android.util.AttributeSet; 34 import android.util.TypedValue; 35 import android.view.GestureDetector; 36 import android.view.Gravity; 37 import android.view.LayoutInflater; 38 import android.view.MotionEvent; 39 import android.view.View; 40 import android.view.ViewConfiguration; 41 import android.view.ViewGroup.LayoutParams; 42 import android.view.accessibility.AccessibilityEvent; 43 import android.view.accessibility.AccessibilityManager; 44 import android.widget.PopupWindow; 45 import android.widget.TextView; 46 47 import com.android.internal.R; 48 49 import java.util.Arrays; 50 import java.util.HashMap; 51 import java.util.List; 52 import java.util.Map; 53 54 /** 55 * A view that renders a virtual {@link Keyboard}. It handles rendering of keys and 56 * detecting key presses and touch movements. 57 * 58 * @attr ref android.R.styleable#KeyboardView_keyBackground 59 * @attr ref android.R.styleable#KeyboardView_keyPreviewLayout 60 * @attr ref android.R.styleable#KeyboardView_keyPreviewOffset 61 * @attr ref android.R.styleable#KeyboardView_keyPreviewHeight 62 * @attr ref android.R.styleable#KeyboardView_labelTextSize 63 * @attr ref android.R.styleable#KeyboardView_keyTextSize 64 * @attr ref android.R.styleable#KeyboardView_keyTextColor 65 * @attr ref android.R.styleable#KeyboardView_verticalCorrection 66 * @attr ref android.R.styleable#KeyboardView_popupLayout 67 */ 68 public class KeyboardView extends View implements View.OnClickListener { 69 70 /** 71 * Listener for virtual keyboard events. 72 */ 73 public interface OnKeyboardActionListener { 74 75 /** 76 * Called when the user presses a key. This is sent before the {@link #onKey} is called. 77 * For keys that repeat, this is only called once. 78 * @param primaryCode the unicode of the key being pressed. If the touch is not on a valid 79 * key, the value will be zero. 80 */ onPress(int primaryCode)81 void onPress(int primaryCode); 82 83 /** 84 * Called when the user releases a key. This is sent after the {@link #onKey} is called. 85 * For keys that repeat, this is only called once. 86 * @param primaryCode the code of the key that was released 87 */ onRelease(int primaryCode)88 void onRelease(int primaryCode); 89 90 /** 91 * Send a key press to the listener. 92 * @param primaryCode this is the key that was pressed 93 * @param keyCodes the codes for all the possible alternative keys 94 * with the primary code being the first. If the primary key code is 95 * a single character such as an alphabet or number or symbol, the alternatives 96 * will include other characters that may be on the same key or adjacent keys. 97 * These codes are useful to correct for accidental presses of a key adjacent to 98 * the intended key. 99 */ onKey(int primaryCode, int[] keyCodes)100 void onKey(int primaryCode, int[] keyCodes); 101 102 /** 103 * Sends a sequence of characters to the listener. 104 * @param text the sequence of characters to be displayed. 105 */ onText(CharSequence text)106 void onText(CharSequence text); 107 108 /** 109 * Called when the user quickly moves the finger from right to left. 110 */ swipeLeft()111 void swipeLeft(); 112 113 /** 114 * Called when the user quickly moves the finger from left to right. 115 */ swipeRight()116 void swipeRight(); 117 118 /** 119 * Called when the user quickly moves the finger from up to down. 120 */ swipeDown()121 void swipeDown(); 122 123 /** 124 * Called when the user quickly moves the finger from down to up. 125 */ swipeUp()126 void swipeUp(); 127 } 128 129 private static final boolean DEBUG = false; 130 private static final int NOT_A_KEY = -1; 131 private static final int[] KEY_DELETE = { Keyboard.KEYCODE_DELETE }; 132 private static final int[] LONG_PRESSABLE_STATE_SET = { R.attr.state_long_pressable }; 133 134 private Keyboard mKeyboard; 135 private int mCurrentKeyIndex = NOT_A_KEY; 136 private int mLabelTextSize; 137 private int mKeyTextSize; 138 private int mKeyTextColor; 139 private float mShadowRadius; 140 private int mShadowColor; 141 private float mBackgroundDimAmount; 142 143 private TextView mPreviewText; 144 private PopupWindow mPreviewPopup; 145 private int mPreviewTextSizeLarge; 146 private int mPreviewOffset; 147 private int mPreviewHeight; 148 // Working variable 149 private final int[] mCoordinates = new int[2]; 150 151 private PopupWindow mPopupKeyboard; 152 private View mMiniKeyboardContainer; 153 private KeyboardView mMiniKeyboard; 154 private boolean mMiniKeyboardOnScreen; 155 private View mPopupParent; 156 private int mMiniKeyboardOffsetX; 157 private int mMiniKeyboardOffsetY; 158 private Map<Key,View> mMiniKeyboardCache; 159 private Key[] mKeys; 160 161 /** Listener for {@link OnKeyboardActionListener}. */ 162 private OnKeyboardActionListener mKeyboardActionListener; 163 164 private static final int MSG_SHOW_PREVIEW = 1; 165 private static final int MSG_REMOVE_PREVIEW = 2; 166 private static final int MSG_REPEAT = 3; 167 private static final int MSG_LONGPRESS = 4; 168 169 private static final int DELAY_BEFORE_PREVIEW = 0; 170 private static final int DELAY_AFTER_PREVIEW = 70; 171 private static final int DEBOUNCE_TIME = 70; 172 173 private int mVerticalCorrection; 174 private int mProximityThreshold; 175 176 private boolean mPreviewCentered = false; 177 private boolean mShowPreview = true; 178 private boolean mShowTouchPoints = true; 179 private int mPopupPreviewX; 180 private int mPopupPreviewY; 181 182 private int mLastX; 183 private int mLastY; 184 private int mStartX; 185 private int mStartY; 186 187 private boolean mProximityCorrectOn; 188 189 private Paint mPaint; 190 private Rect mPadding; 191 192 private long mDownTime; 193 private long mLastMoveTime; 194 private int mLastKey; 195 private int mLastCodeX; 196 private int mLastCodeY; 197 private int mCurrentKey = NOT_A_KEY; 198 private int mDownKey = NOT_A_KEY; 199 private long mLastKeyTime; 200 private long mCurrentKeyTime; 201 private int[] mKeyIndices = new int[12]; 202 private GestureDetector mGestureDetector; 203 private int mPopupX; 204 private int mPopupY; 205 private int mRepeatKeyIndex = NOT_A_KEY; 206 private int mPopupLayout; 207 private boolean mAbortKey; 208 private Key mInvalidatedKey; 209 private Rect mClipRegion = new Rect(0, 0, 0, 0); 210 private boolean mPossiblePoly; 211 private SwipeTracker mSwipeTracker = new SwipeTracker(); 212 private int mSwipeThreshold; 213 private boolean mDisambiguateSwipe; 214 215 // Variables for dealing with multiple pointers 216 private int mOldPointerCount = 1; 217 private float mOldPointerX; 218 private float mOldPointerY; 219 220 private Drawable mKeyBackground; 221 222 private static final int REPEAT_INTERVAL = 50; // ~20 keys per second 223 private static final int REPEAT_START_DELAY = 400; 224 private static final int LONGPRESS_TIMEOUT = ViewConfiguration.getLongPressTimeout(); 225 226 private static int MAX_NEARBY_KEYS = 12; 227 private int[] mDistances = new int[MAX_NEARBY_KEYS]; 228 229 // For multi-tap 230 private int mLastSentIndex; 231 private int mTapCount; 232 private long mLastTapTime; 233 private boolean mInMultiTap; 234 private static final int MULTITAP_INTERVAL = 800; // milliseconds 235 private StringBuilder mPreviewLabel = new StringBuilder(1); 236 237 /** Whether the keyboard bitmap needs to be redrawn before it's blitted. **/ 238 private boolean mDrawPending; 239 /** The dirty region in the keyboard bitmap */ 240 private Rect mDirtyRect = new Rect(); 241 /** The keyboard bitmap for faster updates */ 242 private Bitmap mBuffer; 243 /** Notes if the keyboard just changed, so that we could possibly reallocate the mBuffer. */ 244 private boolean mKeyboardChanged; 245 /** The canvas for the above mutable keyboard bitmap */ 246 private Canvas mCanvas; 247 /** The accessibility manager for accessibility support */ 248 private AccessibilityManager mAccessibilityManager; 249 /** The audio manager for accessibility support */ 250 private AudioManager mAudioManager; 251 /** Whether the requirement of a headset to hear passwords if accessibility is enabled is announced. */ 252 private boolean mHeadsetRequiredToHearPasswordsAnnounced; 253 254 Handler mHandler; 255 KeyboardView(Context context, AttributeSet attrs)256 public KeyboardView(Context context, AttributeSet attrs) { 257 this(context, attrs, com.android.internal.R.attr.keyboardViewStyle); 258 } 259 KeyboardView(Context context, AttributeSet attrs, int defStyleAttr)260 public KeyboardView(Context context, AttributeSet attrs, int defStyleAttr) { 261 this(context, attrs, defStyleAttr, 0); 262 } 263 KeyboardView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes)264 public KeyboardView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) { 265 super(context, attrs, defStyleAttr, defStyleRes); 266 267 TypedArray a = context.obtainStyledAttributes( 268 attrs, android.R.styleable.KeyboardView, defStyleAttr, defStyleRes); 269 270 LayoutInflater inflate = 271 (LayoutInflater) context 272 .getSystemService(Context.LAYOUT_INFLATER_SERVICE); 273 274 int previewLayout = 0; 275 int keyTextSize = 0; 276 277 int n = a.getIndexCount(); 278 279 for (int i = 0; i < n; i++) { 280 int attr = a.getIndex(i); 281 282 switch (attr) { 283 case com.android.internal.R.styleable.KeyboardView_keyBackground: 284 mKeyBackground = a.getDrawable(attr); 285 break; 286 case com.android.internal.R.styleable.KeyboardView_verticalCorrection: 287 mVerticalCorrection = a.getDimensionPixelOffset(attr, 0); 288 break; 289 case com.android.internal.R.styleable.KeyboardView_keyPreviewLayout: 290 previewLayout = a.getResourceId(attr, 0); 291 break; 292 case com.android.internal.R.styleable.KeyboardView_keyPreviewOffset: 293 mPreviewOffset = a.getDimensionPixelOffset(attr, 0); 294 break; 295 case com.android.internal.R.styleable.KeyboardView_keyPreviewHeight: 296 mPreviewHeight = a.getDimensionPixelSize(attr, 80); 297 break; 298 case com.android.internal.R.styleable.KeyboardView_keyTextSize: 299 mKeyTextSize = a.getDimensionPixelSize(attr, 18); 300 break; 301 case com.android.internal.R.styleable.KeyboardView_keyTextColor: 302 mKeyTextColor = a.getColor(attr, 0xFF000000); 303 break; 304 case com.android.internal.R.styleable.KeyboardView_labelTextSize: 305 mLabelTextSize = a.getDimensionPixelSize(attr, 14); 306 break; 307 case com.android.internal.R.styleable.KeyboardView_popupLayout: 308 mPopupLayout = a.getResourceId(attr, 0); 309 break; 310 case com.android.internal.R.styleable.KeyboardView_shadowColor: 311 mShadowColor = a.getColor(attr, 0); 312 break; 313 case com.android.internal.R.styleable.KeyboardView_shadowRadius: 314 mShadowRadius = a.getFloat(attr, 0f); 315 break; 316 } 317 } 318 319 a = mContext.obtainStyledAttributes( 320 com.android.internal.R.styleable.Theme); 321 mBackgroundDimAmount = a.getFloat(android.R.styleable.Theme_backgroundDimAmount, 0.5f); 322 323 mPreviewPopup = new PopupWindow(context); 324 if (previewLayout != 0) { 325 mPreviewText = (TextView) inflate.inflate(previewLayout, null); 326 mPreviewTextSizeLarge = (int) mPreviewText.getTextSize(); 327 mPreviewPopup.setContentView(mPreviewText); 328 mPreviewPopup.setBackgroundDrawable(null); 329 } else { 330 mShowPreview = false; 331 } 332 333 mPreviewPopup.setTouchable(false); 334 335 mPopupKeyboard = new PopupWindow(context); 336 mPopupKeyboard.setBackgroundDrawable(null); 337 //mPopupKeyboard.setClippingEnabled(false); 338 339 mPopupParent = this; 340 //mPredicting = true; 341 342 mPaint = new Paint(); 343 mPaint.setAntiAlias(true); 344 mPaint.setTextSize(keyTextSize); 345 mPaint.setTextAlign(Align.CENTER); 346 mPaint.setAlpha(255); 347 348 mPadding = new Rect(0, 0, 0, 0); 349 mMiniKeyboardCache = new HashMap<Key,View>(); 350 mKeyBackground.getPadding(mPadding); 351 352 mSwipeThreshold = (int) (500 * getResources().getDisplayMetrics().density); 353 mDisambiguateSwipe = getResources().getBoolean( 354 com.android.internal.R.bool.config_swipeDisambiguation); 355 356 mAccessibilityManager = AccessibilityManager.getInstance(context); 357 mAudioManager = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE); 358 359 resetMultiTap(); 360 } 361 362 @Override onAttachedToWindow()363 protected void onAttachedToWindow() { 364 super.onAttachedToWindow(); 365 initGestureDetector(); 366 if (mHandler == null) { 367 mHandler = new Handler() { 368 @Override 369 public void handleMessage(Message msg) { 370 switch (msg.what) { 371 case MSG_SHOW_PREVIEW: 372 showKey(msg.arg1); 373 break; 374 case MSG_REMOVE_PREVIEW: 375 mPreviewText.setVisibility(INVISIBLE); 376 break; 377 case MSG_REPEAT: 378 if (repeatKey()) { 379 Message repeat = Message.obtain(this, MSG_REPEAT); 380 sendMessageDelayed(repeat, REPEAT_INTERVAL); 381 } 382 break; 383 case MSG_LONGPRESS: 384 openPopupIfRequired((MotionEvent) msg.obj); 385 break; 386 } 387 } 388 }; 389 } 390 } 391 initGestureDetector()392 private void initGestureDetector() { 393 if (mGestureDetector == null) { 394 mGestureDetector = new GestureDetector(getContext(), new GestureDetector.SimpleOnGestureListener() { 395 @Override 396 public boolean onFling(MotionEvent me1, MotionEvent me2, 397 float velocityX, float velocityY) { 398 if (mPossiblePoly) return false; 399 final float absX = Math.abs(velocityX); 400 final float absY = Math.abs(velocityY); 401 float deltaX = me2.getX() - me1.getX(); 402 float deltaY = me2.getY() - me1.getY(); 403 int travelX = getWidth() / 2; // Half the keyboard width 404 int travelY = getHeight() / 2; // Half the keyboard height 405 mSwipeTracker.computeCurrentVelocity(1000); 406 final float endingVelocityX = mSwipeTracker.getXVelocity(); 407 final float endingVelocityY = mSwipeTracker.getYVelocity(); 408 boolean sendDownKey = false; 409 if (velocityX > mSwipeThreshold && absY < absX && deltaX > travelX) { 410 if (mDisambiguateSwipe && endingVelocityX < velocityX / 4) { 411 sendDownKey = true; 412 } else { 413 swipeRight(); 414 return true; 415 } 416 } else if (velocityX < -mSwipeThreshold && absY < absX && deltaX < -travelX) { 417 if (mDisambiguateSwipe && endingVelocityX > velocityX / 4) { 418 sendDownKey = true; 419 } else { 420 swipeLeft(); 421 return true; 422 } 423 } else if (velocityY < -mSwipeThreshold && absX < absY && deltaY < -travelY) { 424 if (mDisambiguateSwipe && endingVelocityY > velocityY / 4) { 425 sendDownKey = true; 426 } else { 427 swipeUp(); 428 return true; 429 } 430 } else if (velocityY > mSwipeThreshold && absX < absY / 2 && deltaY > travelY) { 431 if (mDisambiguateSwipe && endingVelocityY < velocityY / 4) { 432 sendDownKey = true; 433 } else { 434 swipeDown(); 435 return true; 436 } 437 } 438 439 if (sendDownKey) { 440 detectAndSendKey(mDownKey, mStartX, mStartY, me1.getEventTime()); 441 } 442 return false; 443 } 444 }); 445 446 mGestureDetector.setIsLongpressEnabled(false); 447 } 448 } 449 setOnKeyboardActionListener(OnKeyboardActionListener listener)450 public void setOnKeyboardActionListener(OnKeyboardActionListener listener) { 451 mKeyboardActionListener = listener; 452 } 453 454 /** 455 * Returns the {@link OnKeyboardActionListener} object. 456 * @return the listener attached to this keyboard 457 */ getOnKeyboardActionListener()458 protected OnKeyboardActionListener getOnKeyboardActionListener() { 459 return mKeyboardActionListener; 460 } 461 462 /** 463 * Attaches a keyboard to this view. The keyboard can be switched at any time and the 464 * view will re-layout itself to accommodate the keyboard. 465 * @see Keyboard 466 * @see #getKeyboard() 467 * @param keyboard the keyboard to display in this view 468 */ setKeyboard(Keyboard keyboard)469 public void setKeyboard(Keyboard keyboard) { 470 if (mKeyboard != null) { 471 showPreview(NOT_A_KEY); 472 } 473 // Remove any pending messages 474 removeMessages(); 475 mKeyboard = keyboard; 476 List<Key> keys = mKeyboard.getKeys(); 477 mKeys = keys.toArray(new Key[keys.size()]); 478 requestLayout(); 479 // Hint to reallocate the buffer if the size changed 480 mKeyboardChanged = true; 481 invalidateAllKeys(); 482 computeProximityThreshold(keyboard); 483 mMiniKeyboardCache.clear(); // Not really necessary to do every time, but will free up views 484 // Switching to a different keyboard should abort any pending keys so that the key up 485 // doesn't get delivered to the old or new keyboard 486 mAbortKey = true; // Until the next ACTION_DOWN 487 } 488 489 /** 490 * Returns the current keyboard being displayed by this view. 491 * @return the currently attached keyboard 492 * @see #setKeyboard(Keyboard) 493 */ getKeyboard()494 public Keyboard getKeyboard() { 495 return mKeyboard; 496 } 497 498 /** 499 * Sets the state of the shift key of the keyboard, if any. 500 * @param shifted whether or not to enable the state of the shift key 501 * @return true if the shift key state changed, false if there was no change 502 * @see KeyboardView#isShifted() 503 */ setShifted(boolean shifted)504 public boolean setShifted(boolean shifted) { 505 if (mKeyboard != null) { 506 if (mKeyboard.setShifted(shifted)) { 507 // The whole keyboard probably needs to be redrawn 508 invalidateAllKeys(); 509 return true; 510 } 511 } 512 return false; 513 } 514 515 /** 516 * Returns the state of the shift key of the keyboard, if any. 517 * @return true if the shift is in a pressed state, false otherwise. If there is 518 * no shift key on the keyboard or there is no keyboard attached, it returns false. 519 * @see KeyboardView#setShifted(boolean) 520 */ isShifted()521 public boolean isShifted() { 522 if (mKeyboard != null) { 523 return mKeyboard.isShifted(); 524 } 525 return false; 526 } 527 528 /** 529 * Enables or disables the key feedback popup. This is a popup that shows a magnified 530 * version of the depressed key. By default the preview is enabled. 531 * @param previewEnabled whether or not to enable the key feedback popup 532 * @see #isPreviewEnabled() 533 */ setPreviewEnabled(boolean previewEnabled)534 public void setPreviewEnabled(boolean previewEnabled) { 535 mShowPreview = previewEnabled; 536 } 537 538 /** 539 * Returns the enabled state of the key feedback popup. 540 * @return whether or not the key feedback popup is enabled 541 * @see #setPreviewEnabled(boolean) 542 */ isPreviewEnabled()543 public boolean isPreviewEnabled() { 544 return mShowPreview; 545 } 546 setVerticalCorrection(int verticalOffset)547 public void setVerticalCorrection(int verticalOffset) { 548 549 } setPopupParent(View v)550 public void setPopupParent(View v) { 551 mPopupParent = v; 552 } 553 setPopupOffset(int x, int y)554 public void setPopupOffset(int x, int y) { 555 mMiniKeyboardOffsetX = x; 556 mMiniKeyboardOffsetY = y; 557 if (mPreviewPopup.isShowing()) { 558 mPreviewPopup.dismiss(); 559 } 560 } 561 562 /** 563 * When enabled, calls to {@link OnKeyboardActionListener#onKey} will include key 564 * codes for adjacent keys. When disabled, only the primary key code will be 565 * reported. 566 * @param enabled whether or not the proximity correction is enabled 567 */ setProximityCorrectionEnabled(boolean enabled)568 public void setProximityCorrectionEnabled(boolean enabled) { 569 mProximityCorrectOn = enabled; 570 } 571 572 /** 573 * Returns true if proximity correction is enabled. 574 */ isProximityCorrectionEnabled()575 public boolean isProximityCorrectionEnabled() { 576 return mProximityCorrectOn; 577 } 578 579 /** 580 * Popup keyboard close button clicked. 581 * @hide 582 */ onClick(View v)583 public void onClick(View v) { 584 dismissPopupKeyboard(); 585 } 586 adjustCase(CharSequence label)587 private CharSequence adjustCase(CharSequence label) { 588 if (mKeyboard.isShifted() && label != null && label.length() < 3 589 && Character.isLowerCase(label.charAt(0))) { 590 label = label.toString().toUpperCase(); 591 } 592 return label; 593 } 594 595 @Override onMeasure(int widthMeasureSpec, int heightMeasureSpec)596 public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 597 // Round up a little 598 if (mKeyboard == null) { 599 setMeasuredDimension(mPaddingLeft + mPaddingRight, mPaddingTop + mPaddingBottom); 600 } else { 601 int width = mKeyboard.getMinWidth() + mPaddingLeft + mPaddingRight; 602 if (MeasureSpec.getSize(widthMeasureSpec) < width + 10) { 603 width = MeasureSpec.getSize(widthMeasureSpec); 604 } 605 setMeasuredDimension(width, mKeyboard.getHeight() + mPaddingTop + mPaddingBottom); 606 } 607 } 608 609 /** 610 * Compute the average distance between adjacent keys (horizontally and vertically) 611 * and square it to get the proximity threshold. We use a square here and in computing 612 * the touch distance from a key's center to avoid taking a square root. 613 * @param keyboard 614 */ computeProximityThreshold(Keyboard keyboard)615 private void computeProximityThreshold(Keyboard keyboard) { 616 if (keyboard == null) return; 617 final Key[] keys = mKeys; 618 if (keys == null) return; 619 int length = keys.length; 620 int dimensionSum = 0; 621 for (int i = 0; i < length; i++) { 622 Key key = keys[i]; 623 dimensionSum += Math.min(key.width, key.height) + key.gap; 624 } 625 if (dimensionSum < 0 || length == 0) return; 626 mProximityThreshold = (int) (dimensionSum * 1.4f / length); 627 mProximityThreshold *= mProximityThreshold; // Square it 628 } 629 630 @Override onSizeChanged(int w, int h, int oldw, int oldh)631 public void onSizeChanged(int w, int h, int oldw, int oldh) { 632 super.onSizeChanged(w, h, oldw, oldh); 633 if (mKeyboard != null) { 634 mKeyboard.resize(w, h); 635 } 636 // Release the buffer, if any and it will be reallocated on the next draw 637 mBuffer = null; 638 } 639 640 @Override onDraw(Canvas canvas)641 public void onDraw(Canvas canvas) { 642 super.onDraw(canvas); 643 if (mDrawPending || mBuffer == null || mKeyboardChanged) { 644 onBufferDraw(); 645 } 646 canvas.drawBitmap(mBuffer, 0, 0, null); 647 } 648 onBufferDraw()649 private void onBufferDraw() { 650 if (mBuffer == null || mKeyboardChanged) { 651 if (mBuffer == null || mKeyboardChanged && 652 (mBuffer.getWidth() != getWidth() || mBuffer.getHeight() != getHeight())) { 653 // Make sure our bitmap is at least 1x1 654 final int width = Math.max(1, getWidth()); 655 final int height = Math.max(1, getHeight()); 656 mBuffer = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888); 657 mCanvas = new Canvas(mBuffer); 658 } 659 invalidateAllKeys(); 660 mKeyboardChanged = false; 661 } 662 663 if (mKeyboard == null) return; 664 665 mCanvas.save(); 666 final Canvas canvas = mCanvas; 667 canvas.clipRect(mDirtyRect); 668 669 final Paint paint = mPaint; 670 final Drawable keyBackground = mKeyBackground; 671 final Rect clipRegion = mClipRegion; 672 final Rect padding = mPadding; 673 final int kbdPaddingLeft = mPaddingLeft; 674 final int kbdPaddingTop = mPaddingTop; 675 final Key[] keys = mKeys; 676 final Key invalidKey = mInvalidatedKey; 677 678 paint.setColor(mKeyTextColor); 679 boolean drawSingleKey = false; 680 if (invalidKey != null && canvas.getClipBounds(clipRegion)) { 681 // Is clipRegion completely contained within the invalidated key? 682 if (invalidKey.x + kbdPaddingLeft - 1 <= clipRegion.left && 683 invalidKey.y + kbdPaddingTop - 1 <= clipRegion.top && 684 invalidKey.x + invalidKey.width + kbdPaddingLeft + 1 >= clipRegion.right && 685 invalidKey.y + invalidKey.height + kbdPaddingTop + 1 >= clipRegion.bottom) { 686 drawSingleKey = true; 687 } 688 } 689 canvas.drawColor(0x00000000, PorterDuff.Mode.CLEAR); 690 final int keyCount = keys.length; 691 for (int i = 0; i < keyCount; i++) { 692 final Key key = keys[i]; 693 if (drawSingleKey && invalidKey != key) { 694 continue; 695 } 696 int[] drawableState = key.getCurrentDrawableState(); 697 keyBackground.setState(drawableState); 698 699 // Switch the character to uppercase if shift is pressed 700 String label = key.label == null? null : adjustCase(key.label).toString(); 701 702 final Rect bounds = keyBackground.getBounds(); 703 if (key.width != bounds.right || 704 key.height != bounds.bottom) { 705 keyBackground.setBounds(0, 0, key.width, key.height); 706 } 707 canvas.translate(key.x + kbdPaddingLeft, key.y + kbdPaddingTop); 708 keyBackground.draw(canvas); 709 710 if (label != null) { 711 // For characters, use large font. For labels like "Done", use small font. 712 if (label.length() > 1 && key.codes.length < 2) { 713 paint.setTextSize(mLabelTextSize); 714 paint.setTypeface(Typeface.DEFAULT_BOLD); 715 } else { 716 paint.setTextSize(mKeyTextSize); 717 paint.setTypeface(Typeface.DEFAULT); 718 } 719 // Draw a drop shadow for the text 720 paint.setShadowLayer(mShadowRadius, 0, 0, mShadowColor); 721 // Draw the text 722 canvas.drawText(label, 723 (key.width - padding.left - padding.right) / 2 724 + padding.left, 725 (key.height - padding.top - padding.bottom) / 2 726 + (paint.getTextSize() - paint.descent()) / 2 + padding.top, 727 paint); 728 // Turn off drop shadow 729 paint.setShadowLayer(0, 0, 0, 0); 730 } else if (key.icon != null) { 731 final int drawableX = (key.width - padding.left - padding.right 732 - key.icon.getIntrinsicWidth()) / 2 + padding.left; 733 final int drawableY = (key.height - padding.top - padding.bottom 734 - key.icon.getIntrinsicHeight()) / 2 + padding.top; 735 canvas.translate(drawableX, drawableY); 736 key.icon.setBounds(0, 0, 737 key.icon.getIntrinsicWidth(), key.icon.getIntrinsicHeight()); 738 key.icon.draw(canvas); 739 canvas.translate(-drawableX, -drawableY); 740 } 741 canvas.translate(-key.x - kbdPaddingLeft, -key.y - kbdPaddingTop); 742 } 743 mInvalidatedKey = null; 744 // Overlay a dark rectangle to dim the keyboard 745 if (mMiniKeyboardOnScreen) { 746 paint.setColor((int) (mBackgroundDimAmount * 0xFF) << 24); 747 canvas.drawRect(0, 0, getWidth(), getHeight(), paint); 748 } 749 750 if (DEBUG && mShowTouchPoints) { 751 paint.setAlpha(128); 752 paint.setColor(0xFFFF0000); 753 canvas.drawCircle(mStartX, mStartY, 3, paint); 754 canvas.drawLine(mStartX, mStartY, mLastX, mLastY, paint); 755 paint.setColor(0xFF0000FF); 756 canvas.drawCircle(mLastX, mLastY, 3, paint); 757 paint.setColor(0xFF00FF00); 758 canvas.drawCircle((mStartX + mLastX) / 2, (mStartY + mLastY) / 2, 2, paint); 759 } 760 mCanvas.restore(); 761 mDrawPending = false; 762 mDirtyRect.setEmpty(); 763 } 764 getKeyIndices(int x, int y, int[] allKeys)765 private int getKeyIndices(int x, int y, int[] allKeys) { 766 final Key[] keys = mKeys; 767 int primaryIndex = NOT_A_KEY; 768 int closestKey = NOT_A_KEY; 769 int closestKeyDist = mProximityThreshold + 1; 770 java.util.Arrays.fill(mDistances, Integer.MAX_VALUE); 771 int [] nearestKeyIndices = mKeyboard.getNearestKeys(x, y); 772 final int keyCount = nearestKeyIndices.length; 773 for (int i = 0; i < keyCount; i++) { 774 final Key key = keys[nearestKeyIndices[i]]; 775 int dist = 0; 776 boolean isInside = key.isInside(x,y); 777 if (isInside) { 778 primaryIndex = nearestKeyIndices[i]; 779 } 780 781 if (((mProximityCorrectOn 782 && (dist = key.squaredDistanceFrom(x, y)) < mProximityThreshold) 783 || isInside) 784 && key.codes[0] > 32) { 785 // Find insertion point 786 final int nCodes = key.codes.length; 787 if (dist < closestKeyDist) { 788 closestKeyDist = dist; 789 closestKey = nearestKeyIndices[i]; 790 } 791 792 if (allKeys == null) continue; 793 794 for (int j = 0; j < mDistances.length; j++) { 795 if (mDistances[j] > dist) { 796 // Make space for nCodes codes 797 System.arraycopy(mDistances, j, mDistances, j + nCodes, 798 mDistances.length - j - nCodes); 799 System.arraycopy(allKeys, j, allKeys, j + nCodes, 800 allKeys.length - j - nCodes); 801 for (int c = 0; c < nCodes; c++) { 802 allKeys[j + c] = key.codes[c]; 803 mDistances[j + c] = dist; 804 } 805 break; 806 } 807 } 808 } 809 } 810 if (primaryIndex == NOT_A_KEY) { 811 primaryIndex = closestKey; 812 } 813 return primaryIndex; 814 } 815 detectAndSendKey(int index, int x, int y, long eventTime)816 private void detectAndSendKey(int index, int x, int y, long eventTime) { 817 if (index != NOT_A_KEY && index < mKeys.length) { 818 final Key key = mKeys[index]; 819 if (key.text != null) { 820 mKeyboardActionListener.onText(key.text); 821 mKeyboardActionListener.onRelease(NOT_A_KEY); 822 } else { 823 int code = key.codes[0]; 824 //TextEntryState.keyPressedAt(key, x, y); 825 int[] codes = new int[MAX_NEARBY_KEYS]; 826 Arrays.fill(codes, NOT_A_KEY); 827 getKeyIndices(x, y, codes); 828 // Multi-tap 829 if (mInMultiTap) { 830 if (mTapCount != -1) { 831 mKeyboardActionListener.onKey(Keyboard.KEYCODE_DELETE, KEY_DELETE); 832 } else { 833 mTapCount = 0; 834 } 835 code = key.codes[mTapCount]; 836 } 837 mKeyboardActionListener.onKey(code, codes); 838 mKeyboardActionListener.onRelease(code); 839 } 840 mLastSentIndex = index; 841 mLastTapTime = eventTime; 842 } 843 } 844 845 /** 846 * Handle multi-tap keys by producing the key label for the current multi-tap state. 847 */ getPreviewText(Key key)848 private CharSequence getPreviewText(Key key) { 849 if (mInMultiTap) { 850 // Multi-tap 851 mPreviewLabel.setLength(0); 852 mPreviewLabel.append((char) key.codes[mTapCount < 0 ? 0 : mTapCount]); 853 return adjustCase(mPreviewLabel); 854 } else { 855 return adjustCase(key.label); 856 } 857 } 858 showPreview(int keyIndex)859 private void showPreview(int keyIndex) { 860 int oldKeyIndex = mCurrentKeyIndex; 861 final PopupWindow previewPopup = mPreviewPopup; 862 863 mCurrentKeyIndex = keyIndex; 864 // Release the old key and press the new key 865 final Key[] keys = mKeys; 866 if (oldKeyIndex != mCurrentKeyIndex) { 867 if (oldKeyIndex != NOT_A_KEY && keys.length > oldKeyIndex) { 868 Key oldKey = keys[oldKeyIndex]; 869 oldKey.onReleased(mCurrentKeyIndex == NOT_A_KEY); 870 invalidateKey(oldKeyIndex); 871 final int keyCode = oldKey.codes[0]; 872 sendAccessibilityEventForUnicodeCharacter(AccessibilityEvent.TYPE_VIEW_HOVER_EXIT, 873 keyCode); 874 // TODO: We need to implement AccessibilityNodeProvider for this view. 875 sendAccessibilityEventForUnicodeCharacter( 876 AccessibilityEvent.TYPE_VIEW_ACCESSIBILITY_FOCUS_CLEARED, keyCode); 877 } 878 if (mCurrentKeyIndex != NOT_A_KEY && keys.length > mCurrentKeyIndex) { 879 Key newKey = keys[mCurrentKeyIndex]; 880 newKey.onPressed(); 881 invalidateKey(mCurrentKeyIndex); 882 final int keyCode = newKey.codes[0]; 883 sendAccessibilityEventForUnicodeCharacter(AccessibilityEvent.TYPE_VIEW_HOVER_ENTER, 884 keyCode); 885 // TODO: We need to implement AccessibilityNodeProvider for this view. 886 sendAccessibilityEventForUnicodeCharacter( 887 AccessibilityEvent.TYPE_VIEW_ACCESSIBILITY_FOCUSED, keyCode); 888 } 889 } 890 // If key changed and preview is on ... 891 if (oldKeyIndex != mCurrentKeyIndex && mShowPreview) { 892 mHandler.removeMessages(MSG_SHOW_PREVIEW); 893 if (previewPopup.isShowing()) { 894 if (keyIndex == NOT_A_KEY) { 895 mHandler.sendMessageDelayed(mHandler 896 .obtainMessage(MSG_REMOVE_PREVIEW), 897 DELAY_AFTER_PREVIEW); 898 } 899 } 900 if (keyIndex != NOT_A_KEY) { 901 if (previewPopup.isShowing() && mPreviewText.getVisibility() == VISIBLE) { 902 // Show right away, if it's already visible and finger is moving around 903 showKey(keyIndex); 904 } else { 905 mHandler.sendMessageDelayed( 906 mHandler.obtainMessage(MSG_SHOW_PREVIEW, keyIndex, 0), 907 DELAY_BEFORE_PREVIEW); 908 } 909 } 910 } 911 } 912 showKey(final int keyIndex)913 private void showKey(final int keyIndex) { 914 final PopupWindow previewPopup = mPreviewPopup; 915 final Key[] keys = mKeys; 916 if (keyIndex < 0 || keyIndex >= mKeys.length) return; 917 Key key = keys[keyIndex]; 918 if (key.icon != null) { 919 mPreviewText.setCompoundDrawables(null, null, null, 920 key.iconPreview != null ? key.iconPreview : key.icon); 921 mPreviewText.setText(null); 922 } else { 923 mPreviewText.setCompoundDrawables(null, null, null, null); 924 mPreviewText.setText(getPreviewText(key)); 925 if (key.label.length() > 1 && key.codes.length < 2) { 926 mPreviewText.setTextSize(TypedValue.COMPLEX_UNIT_PX, mKeyTextSize); 927 mPreviewText.setTypeface(Typeface.DEFAULT_BOLD); 928 } else { 929 mPreviewText.setTextSize(TypedValue.COMPLEX_UNIT_PX, mPreviewTextSizeLarge); 930 mPreviewText.setTypeface(Typeface.DEFAULT); 931 } 932 } 933 mPreviewText.measure(MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED), 934 MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED)); 935 int popupWidth = Math.max(mPreviewText.getMeasuredWidth(), key.width 936 + mPreviewText.getPaddingLeft() + mPreviewText.getPaddingRight()); 937 final int popupHeight = mPreviewHeight; 938 LayoutParams lp = mPreviewText.getLayoutParams(); 939 if (lp != null) { 940 lp.width = popupWidth; 941 lp.height = popupHeight; 942 } 943 if (!mPreviewCentered) { 944 mPopupPreviewX = key.x - mPreviewText.getPaddingLeft() + mPaddingLeft; 945 mPopupPreviewY = key.y - popupHeight + mPreviewOffset; 946 } else { 947 // TODO: Fix this if centering is brought back 948 mPopupPreviewX = 160 - mPreviewText.getMeasuredWidth() / 2; 949 mPopupPreviewY = - mPreviewText.getMeasuredHeight(); 950 } 951 mHandler.removeMessages(MSG_REMOVE_PREVIEW); 952 getLocationInWindow(mCoordinates); 953 mCoordinates[0] += mMiniKeyboardOffsetX; // Offset may be zero 954 mCoordinates[1] += mMiniKeyboardOffsetY; // Offset may be zero 955 956 // Set the preview background state 957 mPreviewText.getBackground().setState( 958 key.popupResId != 0 ? LONG_PRESSABLE_STATE_SET : EMPTY_STATE_SET); 959 mPopupPreviewX += mCoordinates[0]; 960 mPopupPreviewY += mCoordinates[1]; 961 962 // If the popup cannot be shown above the key, put it on the side 963 getLocationOnScreen(mCoordinates); 964 if (mPopupPreviewY + mCoordinates[1] < 0) { 965 // If the key you're pressing is on the left side of the keyboard, show the popup on 966 // the right, offset by enough to see at least one key to the left/right. 967 if (key.x + key.width <= getWidth() / 2) { 968 mPopupPreviewX += (int) (key.width * 2.5); 969 } else { 970 mPopupPreviewX -= (int) (key.width * 2.5); 971 } 972 mPopupPreviewY += popupHeight; 973 } 974 975 if (previewPopup.isShowing()) { 976 previewPopup.update(mPopupPreviewX, mPopupPreviewY, 977 popupWidth, popupHeight); 978 } else { 979 previewPopup.setWidth(popupWidth); 980 previewPopup.setHeight(popupHeight); 981 previewPopup.showAtLocation(mPopupParent, Gravity.NO_GRAVITY, 982 mPopupPreviewX, mPopupPreviewY); 983 } 984 mPreviewText.setVisibility(VISIBLE); 985 } 986 sendAccessibilityEventForUnicodeCharacter(int eventType, int code)987 private void sendAccessibilityEventForUnicodeCharacter(int eventType, int code) { 988 if (mAccessibilityManager.isEnabled()) { 989 AccessibilityEvent event = AccessibilityEvent.obtain(eventType); 990 onInitializeAccessibilityEvent(event); 991 final String text; 992 switch (code) { 993 case Keyboard.KEYCODE_ALT: 994 text = mContext.getString(R.string.keyboardview_keycode_alt); 995 break; 996 case Keyboard.KEYCODE_CANCEL: 997 text = mContext.getString(R.string.keyboardview_keycode_cancel); 998 break; 999 case Keyboard.KEYCODE_DELETE: 1000 text = mContext.getString(R.string.keyboardview_keycode_delete); 1001 break; 1002 case Keyboard.KEYCODE_DONE: 1003 text = mContext.getString(R.string.keyboardview_keycode_done); 1004 break; 1005 case Keyboard.KEYCODE_MODE_CHANGE: 1006 text = mContext.getString(R.string.keyboardview_keycode_mode_change); 1007 break; 1008 case Keyboard.KEYCODE_SHIFT: 1009 text = mContext.getString(R.string.keyboardview_keycode_shift); 1010 break; 1011 case '\n': 1012 text = mContext.getString(R.string.keyboardview_keycode_enter); 1013 break; 1014 default: 1015 text = String.valueOf((char) code); 1016 } 1017 event.getText().add(text); 1018 mAccessibilityManager.sendAccessibilityEvent(event); 1019 } 1020 } 1021 1022 /** 1023 * Requests a redraw of the entire keyboard. Calling {@link #invalidate} is not sufficient 1024 * because the keyboard renders the keys to an off-screen buffer and an invalidate() only 1025 * draws the cached buffer. 1026 * @see #invalidateKey(int) 1027 */ invalidateAllKeys()1028 public void invalidateAllKeys() { 1029 mDirtyRect.union(0, 0, getWidth(), getHeight()); 1030 mDrawPending = true; 1031 invalidate(); 1032 } 1033 1034 /** 1035 * Invalidates a key so that it will be redrawn on the next repaint. Use this method if only 1036 * one key is changing it's content. Any changes that affect the position or size of the key 1037 * may not be honored. 1038 * @param keyIndex the index of the key in the attached {@link Keyboard}. 1039 * @see #invalidateAllKeys 1040 */ invalidateKey(int keyIndex)1041 public void invalidateKey(int keyIndex) { 1042 if (mKeys == null) return; 1043 if (keyIndex < 0 || keyIndex >= mKeys.length) { 1044 return; 1045 } 1046 final Key key = mKeys[keyIndex]; 1047 mInvalidatedKey = key; 1048 mDirtyRect.union(key.x + mPaddingLeft, key.y + mPaddingTop, 1049 key.x + key.width + mPaddingLeft, key.y + key.height + mPaddingTop); 1050 onBufferDraw(); 1051 invalidate(key.x + mPaddingLeft, key.y + mPaddingTop, 1052 key.x + key.width + mPaddingLeft, key.y + key.height + mPaddingTop); 1053 } 1054 openPopupIfRequired(MotionEvent me)1055 private boolean openPopupIfRequired(MotionEvent me) { 1056 // Check if we have a popup layout specified first. 1057 if (mPopupLayout == 0) { 1058 return false; 1059 } 1060 if (mCurrentKey < 0 || mCurrentKey >= mKeys.length) { 1061 return false; 1062 } 1063 1064 Key popupKey = mKeys[mCurrentKey]; 1065 boolean result = onLongPress(popupKey); 1066 if (result) { 1067 mAbortKey = true; 1068 showPreview(NOT_A_KEY); 1069 } 1070 return result; 1071 } 1072 1073 /** 1074 * Called when a key is long pressed. By default this will open any popup keyboard associated 1075 * with this key through the attributes popupLayout and popupCharacters. 1076 * @param popupKey the key that was long pressed 1077 * @return true if the long press is handled, false otherwise. Subclasses should call the 1078 * method on the base class if the subclass doesn't wish to handle the call. 1079 */ onLongPress(Key popupKey)1080 protected boolean onLongPress(Key popupKey) { 1081 int popupKeyboardId = popupKey.popupResId; 1082 1083 if (popupKeyboardId != 0) { 1084 mMiniKeyboardContainer = mMiniKeyboardCache.get(popupKey); 1085 if (mMiniKeyboardContainer == null) { 1086 LayoutInflater inflater = (LayoutInflater) getContext().getSystemService( 1087 Context.LAYOUT_INFLATER_SERVICE); 1088 mMiniKeyboardContainer = inflater.inflate(mPopupLayout, null); 1089 mMiniKeyboard = (KeyboardView) mMiniKeyboardContainer.findViewById( 1090 com.android.internal.R.id.keyboardView); 1091 View closeButton = mMiniKeyboardContainer.findViewById( 1092 com.android.internal.R.id.closeButton); 1093 if (closeButton != null) closeButton.setOnClickListener(this); 1094 mMiniKeyboard.setOnKeyboardActionListener(new OnKeyboardActionListener() { 1095 public void onKey(int primaryCode, int[] keyCodes) { 1096 mKeyboardActionListener.onKey(primaryCode, keyCodes); 1097 dismissPopupKeyboard(); 1098 } 1099 1100 public void onText(CharSequence text) { 1101 mKeyboardActionListener.onText(text); 1102 dismissPopupKeyboard(); 1103 } 1104 1105 public void swipeLeft() { } 1106 public void swipeRight() { } 1107 public void swipeUp() { } 1108 public void swipeDown() { } 1109 public void onPress(int primaryCode) { 1110 mKeyboardActionListener.onPress(primaryCode); 1111 } 1112 public void onRelease(int primaryCode) { 1113 mKeyboardActionListener.onRelease(primaryCode); 1114 } 1115 }); 1116 //mInputView.setSuggest(mSuggest); 1117 Keyboard keyboard; 1118 if (popupKey.popupCharacters != null) { 1119 keyboard = new Keyboard(getContext(), popupKeyboardId, 1120 popupKey.popupCharacters, -1, getPaddingLeft() + getPaddingRight()); 1121 } else { 1122 keyboard = new Keyboard(getContext(), popupKeyboardId); 1123 } 1124 mMiniKeyboard.setKeyboard(keyboard); 1125 mMiniKeyboard.setPopupParent(this); 1126 mMiniKeyboardContainer.measure( 1127 MeasureSpec.makeMeasureSpec(getWidth(), MeasureSpec.AT_MOST), 1128 MeasureSpec.makeMeasureSpec(getHeight(), MeasureSpec.AT_MOST)); 1129 1130 mMiniKeyboardCache.put(popupKey, mMiniKeyboardContainer); 1131 } else { 1132 mMiniKeyboard = (KeyboardView) mMiniKeyboardContainer.findViewById( 1133 com.android.internal.R.id.keyboardView); 1134 } 1135 getLocationInWindow(mCoordinates); 1136 mPopupX = popupKey.x + mPaddingLeft; 1137 mPopupY = popupKey.y + mPaddingTop; 1138 mPopupX = mPopupX + popupKey.width - mMiniKeyboardContainer.getMeasuredWidth(); 1139 mPopupY = mPopupY - mMiniKeyboardContainer.getMeasuredHeight(); 1140 final int x = mPopupX + mMiniKeyboardContainer.getPaddingRight() + mCoordinates[0]; 1141 final int y = mPopupY + mMiniKeyboardContainer.getPaddingBottom() + mCoordinates[1]; 1142 mMiniKeyboard.setPopupOffset(x < 0 ? 0 : x, y); 1143 mMiniKeyboard.setShifted(isShifted()); 1144 mPopupKeyboard.setContentView(mMiniKeyboardContainer); 1145 mPopupKeyboard.setWidth(mMiniKeyboardContainer.getMeasuredWidth()); 1146 mPopupKeyboard.setHeight(mMiniKeyboardContainer.getMeasuredHeight()); 1147 mPopupKeyboard.showAtLocation(this, Gravity.NO_GRAVITY, x, y); 1148 mMiniKeyboardOnScreen = true; 1149 //mMiniKeyboard.onTouchEvent(getTranslatedEvent(me)); 1150 invalidateAllKeys(); 1151 return true; 1152 } 1153 return false; 1154 } 1155 1156 @Override 1157 public boolean onHoverEvent(MotionEvent event) { 1158 if (mAccessibilityManager.isTouchExplorationEnabled() && event.getPointerCount() == 1) { 1159 final int action = event.getAction(); 1160 switch (action) { 1161 case MotionEvent.ACTION_HOVER_ENTER: { 1162 event.setAction(MotionEvent.ACTION_DOWN); 1163 } break; 1164 case MotionEvent.ACTION_HOVER_MOVE: { 1165 event.setAction(MotionEvent.ACTION_MOVE); 1166 } break; 1167 case MotionEvent.ACTION_HOVER_EXIT: { 1168 event.setAction(MotionEvent.ACTION_UP); 1169 } break; 1170 } 1171 return onTouchEvent(event); 1172 } 1173 return true; 1174 } 1175 1176 @Override 1177 public boolean onTouchEvent(MotionEvent me) { 1178 // Convert multi-pointer up/down events to single up/down events to 1179 // deal with the typical multi-pointer behavior of two-thumb typing 1180 final int pointerCount = me.getPointerCount(); 1181 final int action = me.getAction(); 1182 boolean result = false; 1183 final long now = me.getEventTime(); 1184 1185 if (pointerCount != mOldPointerCount) { 1186 if (pointerCount == 1) { 1187 // Send a down event for the latest pointer 1188 MotionEvent down = MotionEvent.obtain(now, now, MotionEvent.ACTION_DOWN, 1189 me.getX(), me.getY(), me.getMetaState()); 1190 result = onModifiedTouchEvent(down, false); 1191 down.recycle(); 1192 // If it's an up action, then deliver the up as well. 1193 if (action == MotionEvent.ACTION_UP) { 1194 result = onModifiedTouchEvent(me, true); 1195 } 1196 } else { 1197 // Send an up event for the last pointer 1198 MotionEvent up = MotionEvent.obtain(now, now, MotionEvent.ACTION_UP, 1199 mOldPointerX, mOldPointerY, me.getMetaState()); 1200 result = onModifiedTouchEvent(up, true); 1201 up.recycle(); 1202 } 1203 } else { 1204 if (pointerCount == 1) { 1205 result = onModifiedTouchEvent(me, false); 1206 mOldPointerX = me.getX(); 1207 mOldPointerY = me.getY(); 1208 } else { 1209 // Don't do anything when 2 pointers are down and moving. 1210 result = true; 1211 } 1212 } 1213 mOldPointerCount = pointerCount; 1214 1215 return result; 1216 } 1217 1218 private boolean onModifiedTouchEvent(MotionEvent me, boolean possiblePoly) { 1219 int touchX = (int) me.getX() - mPaddingLeft; 1220 int touchY = (int) me.getY() - mPaddingTop; 1221 if (touchY >= -mVerticalCorrection) 1222 touchY += mVerticalCorrection; 1223 final int action = me.getAction(); 1224 final long eventTime = me.getEventTime(); 1225 int keyIndex = getKeyIndices(touchX, touchY, null); 1226 mPossiblePoly = possiblePoly; 1227 1228 // Track the last few movements to look for spurious swipes. 1229 if (action == MotionEvent.ACTION_DOWN) mSwipeTracker.clear(); 1230 mSwipeTracker.addMovement(me); 1231 1232 // Ignore all motion events until a DOWN. 1233 if (mAbortKey 1234 && action != MotionEvent.ACTION_DOWN && action != MotionEvent.ACTION_CANCEL) { 1235 return true; 1236 } 1237 1238 if (mGestureDetector.onTouchEvent(me)) { 1239 showPreview(NOT_A_KEY); 1240 mHandler.removeMessages(MSG_REPEAT); 1241 mHandler.removeMessages(MSG_LONGPRESS); 1242 return true; 1243 } 1244 1245 // Needs to be called after the gesture detector gets a turn, as it may have 1246 // displayed the mini keyboard 1247 if (mMiniKeyboardOnScreen && action != MotionEvent.ACTION_CANCEL) { 1248 return true; 1249 } 1250 1251 switch (action) { 1252 case MotionEvent.ACTION_DOWN: 1253 mAbortKey = false; 1254 mStartX = touchX; 1255 mStartY = touchY; 1256 mLastCodeX = touchX; 1257 mLastCodeY = touchY; 1258 mLastKeyTime = 0; 1259 mCurrentKeyTime = 0; 1260 mLastKey = NOT_A_KEY; 1261 mCurrentKey = keyIndex; 1262 mDownKey = keyIndex; 1263 mDownTime = me.getEventTime(); 1264 mLastMoveTime = mDownTime; 1265 checkMultiTap(eventTime, keyIndex); 1266 mKeyboardActionListener.onPress(keyIndex != NOT_A_KEY ? 1267 mKeys[keyIndex].codes[0] : 0); 1268 if (mCurrentKey >= 0 && mKeys[mCurrentKey].repeatable) { 1269 mRepeatKeyIndex = mCurrentKey; 1270 Message msg = mHandler.obtainMessage(MSG_REPEAT); 1271 mHandler.sendMessageDelayed(msg, REPEAT_START_DELAY); 1272 repeatKey(); 1273 // Delivering the key could have caused an abort 1274 if (mAbortKey) { 1275 mRepeatKeyIndex = NOT_A_KEY; 1276 break; 1277 } 1278 } 1279 if (mCurrentKey != NOT_A_KEY) { 1280 Message msg = mHandler.obtainMessage(MSG_LONGPRESS, me); 1281 mHandler.sendMessageDelayed(msg, LONGPRESS_TIMEOUT); 1282 } 1283 showPreview(keyIndex); 1284 break; 1285 1286 case MotionEvent.ACTION_MOVE: 1287 boolean continueLongPress = false; 1288 if (keyIndex != NOT_A_KEY) { 1289 if (mCurrentKey == NOT_A_KEY) { 1290 mCurrentKey = keyIndex; 1291 mCurrentKeyTime = eventTime - mDownTime; 1292 } else { 1293 if (keyIndex == mCurrentKey) { 1294 mCurrentKeyTime += eventTime - mLastMoveTime; 1295 continueLongPress = true; 1296 } else if (mRepeatKeyIndex == NOT_A_KEY) { 1297 resetMultiTap(); 1298 mLastKey = mCurrentKey; 1299 mLastCodeX = mLastX; 1300 mLastCodeY = mLastY; 1301 mLastKeyTime = 1302 mCurrentKeyTime + eventTime - mLastMoveTime; 1303 mCurrentKey = keyIndex; 1304 mCurrentKeyTime = 0; 1305 } 1306 } 1307 } 1308 if (!continueLongPress) { 1309 // Cancel old longpress 1310 mHandler.removeMessages(MSG_LONGPRESS); 1311 // Start new longpress if key has changed 1312 if (keyIndex != NOT_A_KEY) { 1313 Message msg = mHandler.obtainMessage(MSG_LONGPRESS, me); 1314 mHandler.sendMessageDelayed(msg, LONGPRESS_TIMEOUT); 1315 } 1316 } 1317 showPreview(mCurrentKey); 1318 mLastMoveTime = eventTime; 1319 break; 1320 1321 case MotionEvent.ACTION_UP: 1322 removeMessages(); 1323 if (keyIndex == mCurrentKey) { 1324 mCurrentKeyTime += eventTime - mLastMoveTime; 1325 } else { 1326 resetMultiTap(); 1327 mLastKey = mCurrentKey; 1328 mLastKeyTime = mCurrentKeyTime + eventTime - mLastMoveTime; 1329 mCurrentKey = keyIndex; 1330 mCurrentKeyTime = 0; 1331 } 1332 if (mCurrentKeyTime < mLastKeyTime && mCurrentKeyTime < DEBOUNCE_TIME 1333 && mLastKey != NOT_A_KEY) { 1334 mCurrentKey = mLastKey; 1335 touchX = mLastCodeX; 1336 touchY = mLastCodeY; 1337 } 1338 showPreview(NOT_A_KEY); 1339 Arrays.fill(mKeyIndices, NOT_A_KEY); 1340 // If we're not on a repeating key (which sends on a DOWN event) 1341 if (mRepeatKeyIndex == NOT_A_KEY && !mMiniKeyboardOnScreen && !mAbortKey) { 1342 detectAndSendKey(mCurrentKey, touchX, touchY, eventTime); 1343 } 1344 invalidateKey(keyIndex); 1345 mRepeatKeyIndex = NOT_A_KEY; 1346 break; 1347 case MotionEvent.ACTION_CANCEL: 1348 removeMessages(); 1349 dismissPopupKeyboard(); 1350 mAbortKey = true; 1351 showPreview(NOT_A_KEY); 1352 invalidateKey(mCurrentKey); 1353 break; 1354 } 1355 mLastX = touchX; 1356 mLastY = touchY; 1357 return true; 1358 } 1359 repeatKey()1360 private boolean repeatKey() { 1361 Key key = mKeys[mRepeatKeyIndex]; 1362 detectAndSendKey(mCurrentKey, key.x, key.y, mLastTapTime); 1363 return true; 1364 } 1365 swipeRight()1366 protected void swipeRight() { 1367 mKeyboardActionListener.swipeRight(); 1368 } 1369 swipeLeft()1370 protected void swipeLeft() { 1371 mKeyboardActionListener.swipeLeft(); 1372 } 1373 swipeUp()1374 protected void swipeUp() { 1375 mKeyboardActionListener.swipeUp(); 1376 } 1377 swipeDown()1378 protected void swipeDown() { 1379 mKeyboardActionListener.swipeDown(); 1380 } 1381 closing()1382 public void closing() { 1383 if (mPreviewPopup.isShowing()) { 1384 mPreviewPopup.dismiss(); 1385 } 1386 removeMessages(); 1387 1388 dismissPopupKeyboard(); 1389 mBuffer = null; 1390 mCanvas = null; 1391 mMiniKeyboardCache.clear(); 1392 } 1393 removeMessages()1394 private void removeMessages() { 1395 if (mHandler != null) { 1396 mHandler.removeMessages(MSG_REPEAT); 1397 mHandler.removeMessages(MSG_LONGPRESS); 1398 mHandler.removeMessages(MSG_SHOW_PREVIEW); 1399 } 1400 } 1401 1402 @Override onDetachedFromWindow()1403 public void onDetachedFromWindow() { 1404 super.onDetachedFromWindow(); 1405 closing(); 1406 } 1407 dismissPopupKeyboard()1408 private void dismissPopupKeyboard() { 1409 if (mPopupKeyboard.isShowing()) { 1410 mPopupKeyboard.dismiss(); 1411 mMiniKeyboardOnScreen = false; 1412 invalidateAllKeys(); 1413 } 1414 } 1415 handleBack()1416 public boolean handleBack() { 1417 if (mPopupKeyboard.isShowing()) { 1418 dismissPopupKeyboard(); 1419 return true; 1420 } 1421 return false; 1422 } 1423 resetMultiTap()1424 private void resetMultiTap() { 1425 mLastSentIndex = NOT_A_KEY; 1426 mTapCount = 0; 1427 mLastTapTime = -1; 1428 mInMultiTap = false; 1429 } 1430 checkMultiTap(long eventTime, int keyIndex)1431 private void checkMultiTap(long eventTime, int keyIndex) { 1432 if (keyIndex == NOT_A_KEY) return; 1433 Key key = mKeys[keyIndex]; 1434 if (key.codes.length > 1) { 1435 mInMultiTap = true; 1436 if (eventTime < mLastTapTime + MULTITAP_INTERVAL 1437 && keyIndex == mLastSentIndex) { 1438 mTapCount = (mTapCount + 1) % key.codes.length; 1439 return; 1440 } else { 1441 mTapCount = -1; 1442 return; 1443 } 1444 } 1445 if (eventTime > mLastTapTime + MULTITAP_INTERVAL || keyIndex != mLastSentIndex) { 1446 resetMultiTap(); 1447 } 1448 } 1449 1450 private static class SwipeTracker { 1451 1452 static final int NUM_PAST = 4; 1453 static final int LONGEST_PAST_TIME = 200; 1454 1455 final float mPastX[] = new float[NUM_PAST]; 1456 final float mPastY[] = new float[NUM_PAST]; 1457 final long mPastTime[] = new long[NUM_PAST]; 1458 1459 float mYVelocity; 1460 float mXVelocity; 1461 clear()1462 public void clear() { 1463 mPastTime[0] = 0; 1464 } 1465 addMovement(MotionEvent ev)1466 public void addMovement(MotionEvent ev) { 1467 long time = ev.getEventTime(); 1468 final int N = ev.getHistorySize(); 1469 for (int i=0; i<N; i++) { 1470 addPoint(ev.getHistoricalX(i), ev.getHistoricalY(i), 1471 ev.getHistoricalEventTime(i)); 1472 } 1473 addPoint(ev.getX(), ev.getY(), time); 1474 } 1475 addPoint(float x, float y, long time)1476 private void addPoint(float x, float y, long time) { 1477 int drop = -1; 1478 int i; 1479 final long[] pastTime = mPastTime; 1480 for (i=0; i<NUM_PAST; i++) { 1481 if (pastTime[i] == 0) { 1482 break; 1483 } else if (pastTime[i] < time-LONGEST_PAST_TIME) { 1484 drop = i; 1485 } 1486 } 1487 if (i == NUM_PAST && drop < 0) { 1488 drop = 0; 1489 } 1490 if (drop == i) drop--; 1491 final float[] pastX = mPastX; 1492 final float[] pastY = mPastY; 1493 if (drop >= 0) { 1494 final int start = drop+1; 1495 final int count = NUM_PAST-drop-1; 1496 System.arraycopy(pastX, start, pastX, 0, count); 1497 System.arraycopy(pastY, start, pastY, 0, count); 1498 System.arraycopy(pastTime, start, pastTime, 0, count); 1499 i -= (drop+1); 1500 } 1501 pastX[i] = x; 1502 pastY[i] = y; 1503 pastTime[i] = time; 1504 i++; 1505 if (i < NUM_PAST) { 1506 pastTime[i] = 0; 1507 } 1508 } 1509 computeCurrentVelocity(int units)1510 public void computeCurrentVelocity(int units) { 1511 computeCurrentVelocity(units, Float.MAX_VALUE); 1512 } 1513 computeCurrentVelocity(int units, float maxVelocity)1514 public void computeCurrentVelocity(int units, float maxVelocity) { 1515 final float[] pastX = mPastX; 1516 final float[] pastY = mPastY; 1517 final long[] pastTime = mPastTime; 1518 1519 final float oldestX = pastX[0]; 1520 final float oldestY = pastY[0]; 1521 final long oldestTime = pastTime[0]; 1522 float accumX = 0; 1523 float accumY = 0; 1524 int N=0; 1525 while (N < NUM_PAST) { 1526 if (pastTime[N] == 0) { 1527 break; 1528 } 1529 N++; 1530 } 1531 1532 for (int i=1; i < N; i++) { 1533 final int dur = (int)(pastTime[i] - oldestTime); 1534 if (dur == 0) continue; 1535 float dist = pastX[i] - oldestX; 1536 float vel = (dist/dur) * units; // pixels/frame. 1537 if (accumX == 0) accumX = vel; 1538 else accumX = (accumX + vel) * .5f; 1539 1540 dist = pastY[i] - oldestY; 1541 vel = (dist/dur) * units; // pixels/frame. 1542 if (accumY == 0) accumY = vel; 1543 else accumY = (accumY + vel) * .5f; 1544 } 1545 mXVelocity = accumX < 0.0f ? Math.max(accumX, -maxVelocity) 1546 : Math.min(accumX, maxVelocity); 1547 mYVelocity = accumY < 0.0f ? Math.max(accumY, -maxVelocity) 1548 : Math.min(accumY, maxVelocity); 1549 } 1550 1551 public float getXVelocity() { 1552 return mXVelocity; 1553 } 1554 1555 public float getYVelocity() { 1556 return mYVelocity; 1557 } 1558 } 1559 } 1560