KeyboardView.java revision e8b8e1aed046711b41804de1670e58c7a8a9d6ad
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 17package android.inputmethodservice; 18 19import android.content.Context; 20import android.content.res.TypedArray; 21import android.graphics.Bitmap; 22import android.graphics.Canvas; 23import android.graphics.Paint; 24import android.graphics.PorterDuff; 25import android.graphics.Rect; 26import android.graphics.Typeface; 27import android.graphics.Paint.Align; 28import android.graphics.Region.Op; 29import android.graphics.drawable.Drawable; 30import android.inputmethodservice.Keyboard.Key; 31import android.media.AudioManager; 32import android.os.Handler; 33import android.os.Message; 34import android.util.AttributeSet; 35import android.util.TypedValue; 36import android.view.GestureDetector; 37import android.view.Gravity; 38import android.view.LayoutInflater; 39import android.view.MotionEvent; 40import android.view.View; 41import android.view.ViewConfiguration; 42import android.view.ViewGroup.LayoutParams; 43import android.view.accessibility.AccessibilityEvent; 44import android.view.accessibility.AccessibilityManager; 45import android.widget.PopupWindow; 46import android.widget.TextView; 47 48import com.android.internal.R; 49 50import java.util.Arrays; 51import java.util.HashMap; 52import java.util.List; 53import java.util.Map; 54 55/** 56 * A view that renders a virtual {@link Keyboard}. It handles rendering of keys and 57 * detecting key presses and touch movements. 58 * 59 * @attr ref android.R.styleable#KeyboardView_keyBackground 60 * @attr ref android.R.styleable#KeyboardView_keyPreviewLayout 61 * @attr ref android.R.styleable#KeyboardView_keyPreviewOffset 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 */ 68public 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 */ 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 */ 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 */ 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 */ 106 void onText(CharSequence text); 107 108 /** 109 * Called when the user quickly moves the finger from right to left. 110 */ 111 void swipeLeft(); 112 113 /** 114 * Called when the user quickly moves the finger from left to right. 115 */ 116 void swipeRight(); 117 118 /** 119 * Called when the user quickly moves the finger from up to down. 120 */ 121 void swipeDown(); 122 123 /** 124 * Called when the user quickly moves the finger from down to up. 125 */ 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; 251 252 Handler mHandler = new Handler() { 253 @Override 254 public void handleMessage(Message msg) { 255 switch (msg.what) { 256 case MSG_SHOW_PREVIEW: 257 showKey(msg.arg1); 258 break; 259 case MSG_REMOVE_PREVIEW: 260 mPreviewText.setVisibility(INVISIBLE); 261 break; 262 case MSG_REPEAT: 263 if (repeatKey()) { 264 Message repeat = Message.obtain(this, MSG_REPEAT); 265 sendMessageDelayed(repeat, REPEAT_INTERVAL); 266 } 267 break; 268 case MSG_LONGPRESS: 269 openPopupIfRequired((MotionEvent) msg.obj); 270 break; 271 } 272 } 273 }; 274 275 public KeyboardView(Context context, AttributeSet attrs) { 276 this(context, attrs, com.android.internal.R.attr.keyboardViewStyle); 277 } 278 279 public KeyboardView(Context context, AttributeSet attrs, int defStyle) { 280 super(context, attrs, defStyle); 281 282 TypedArray a = 283 context.obtainStyledAttributes( 284 attrs, android.R.styleable.KeyboardView, defStyle, 0); 285 286 LayoutInflater inflate = 287 (LayoutInflater) context 288 .getSystemService(Context.LAYOUT_INFLATER_SERVICE); 289 290 int previewLayout = 0; 291 int keyTextSize = 0; 292 293 int n = a.getIndexCount(); 294 295 for (int i = 0; i < n; i++) { 296 int attr = a.getIndex(i); 297 298 switch (attr) { 299 case com.android.internal.R.styleable.KeyboardView_keyBackground: 300 mKeyBackground = a.getDrawable(attr); 301 break; 302 case com.android.internal.R.styleable.KeyboardView_verticalCorrection: 303 mVerticalCorrection = a.getDimensionPixelOffset(attr, 0); 304 break; 305 case com.android.internal.R.styleable.KeyboardView_keyPreviewLayout: 306 previewLayout = a.getResourceId(attr, 0); 307 break; 308 case com.android.internal.R.styleable.KeyboardView_keyPreviewOffset: 309 mPreviewOffset = a.getDimensionPixelOffset(attr, 0); 310 break; 311 case com.android.internal.R.styleable.KeyboardView_keyPreviewHeight: 312 mPreviewHeight = a.getDimensionPixelSize(attr, 80); 313 break; 314 case com.android.internal.R.styleable.KeyboardView_keyTextSize: 315 mKeyTextSize = a.getDimensionPixelSize(attr, 18); 316 break; 317 case com.android.internal.R.styleable.KeyboardView_keyTextColor: 318 mKeyTextColor = a.getColor(attr, 0xFF000000); 319 break; 320 case com.android.internal.R.styleable.KeyboardView_labelTextSize: 321 mLabelTextSize = a.getDimensionPixelSize(attr, 14); 322 break; 323 case com.android.internal.R.styleable.KeyboardView_popupLayout: 324 mPopupLayout = a.getResourceId(attr, 0); 325 break; 326 case com.android.internal.R.styleable.KeyboardView_shadowColor: 327 mShadowColor = a.getColor(attr, 0); 328 break; 329 case com.android.internal.R.styleable.KeyboardView_shadowRadius: 330 mShadowRadius = a.getFloat(attr, 0f); 331 break; 332 } 333 } 334 335 a = mContext.obtainStyledAttributes( 336 com.android.internal.R.styleable.Theme); 337 mBackgroundDimAmount = a.getFloat(android.R.styleable.Theme_backgroundDimAmount, 0.5f); 338 339 mPreviewPopup = new PopupWindow(context); 340 if (previewLayout != 0) { 341 mPreviewText = (TextView) inflate.inflate(previewLayout, null); 342 mPreviewTextSizeLarge = (int) mPreviewText.getTextSize(); 343 mPreviewPopup.setContentView(mPreviewText); 344 mPreviewPopup.setBackgroundDrawable(null); 345 } else { 346 mShowPreview = false; 347 } 348 349 mPreviewPopup.setTouchable(false); 350 351 mPopupKeyboard = new PopupWindow(context); 352 mPopupKeyboard.setBackgroundDrawable(null); 353 //mPopupKeyboard.setClippingEnabled(false); 354 355 mPopupParent = this; 356 //mPredicting = true; 357 358 mPaint = new Paint(); 359 mPaint.setAntiAlias(true); 360 mPaint.setTextSize(keyTextSize); 361 mPaint.setTextAlign(Align.CENTER); 362 mPaint.setAlpha(255); 363 364 mPadding = new Rect(0, 0, 0, 0); 365 mMiniKeyboardCache = new HashMap<Key,View>(); 366 mKeyBackground.getPadding(mPadding); 367 368 mSwipeThreshold = (int) (500 * getResources().getDisplayMetrics().density); 369 mDisambiguateSwipe = getResources().getBoolean( 370 com.android.internal.R.bool.config_swipeDisambiguation); 371 372 mAccessibilityManager = AccessibilityManager.getInstance(context); 373 mAudioManager = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE); 374 375 resetMultiTap(); 376 initGestureDetector(); 377 } 378 379 private void initGestureDetector() { 380 mGestureDetector = new GestureDetector(getContext(), new GestureDetector.SimpleOnGestureListener() { 381 @Override 382 public boolean onFling(MotionEvent me1, MotionEvent me2, 383 float velocityX, float velocityY) { 384 if (mPossiblePoly) return false; 385 final float absX = Math.abs(velocityX); 386 final float absY = Math.abs(velocityY); 387 float deltaX = me2.getX() - me1.getX(); 388 float deltaY = me2.getY() - me1.getY(); 389 int travelX = getWidth() / 2; // Half the keyboard width 390 int travelY = getHeight() / 2; // Half the keyboard height 391 mSwipeTracker.computeCurrentVelocity(1000); 392 final float endingVelocityX = mSwipeTracker.getXVelocity(); 393 final float endingVelocityY = mSwipeTracker.getYVelocity(); 394 boolean sendDownKey = false; 395 if (velocityX > mSwipeThreshold && absY < absX && deltaX > travelX) { 396 if (mDisambiguateSwipe && endingVelocityX < velocityX / 4) { 397 sendDownKey = true; 398 } else { 399 swipeRight(); 400 return true; 401 } 402 } else if (velocityX < -mSwipeThreshold && absY < absX && deltaX < -travelX) { 403 if (mDisambiguateSwipe && endingVelocityX > velocityX / 4) { 404 sendDownKey = true; 405 } else { 406 swipeLeft(); 407 return true; 408 } 409 } else if (velocityY < -mSwipeThreshold && absX < absY && deltaY < -travelY) { 410 if (mDisambiguateSwipe && endingVelocityY > velocityY / 4) { 411 sendDownKey = true; 412 } else { 413 swipeUp(); 414 return true; 415 } 416 } else if (velocityY > mSwipeThreshold && absX < absY / 2 && deltaY > travelY) { 417 if (mDisambiguateSwipe && endingVelocityY < velocityY / 4) { 418 sendDownKey = true; 419 } else { 420 swipeDown(); 421 return true; 422 } 423 } 424 425 if (sendDownKey) { 426 detectAndSendKey(mDownKey, mStartX, mStartY, me1.getEventTime()); 427 } 428 return false; 429 } 430 }); 431 432 mGestureDetector.setIsLongpressEnabled(false); 433 } 434 435 public void setOnKeyboardActionListener(OnKeyboardActionListener listener) { 436 mKeyboardActionListener = listener; 437 } 438 439 /** 440 * Returns the {@link OnKeyboardActionListener} object. 441 * @return the listener attached to this keyboard 442 */ 443 protected OnKeyboardActionListener getOnKeyboardActionListener() { 444 return mKeyboardActionListener; 445 } 446 447 /** 448 * Attaches a keyboard to this view. The keyboard can be switched at any time and the 449 * view will re-layout itself to accommodate the keyboard. 450 * @see Keyboard 451 * @see #getKeyboard() 452 * @param keyboard the keyboard to display in this view 453 */ 454 public void setKeyboard(Keyboard keyboard) { 455 if (mKeyboard != null) { 456 showPreview(NOT_A_KEY); 457 } 458 // Remove any pending messages 459 removeMessages(); 460 mKeyboard = keyboard; 461 List<Key> keys = mKeyboard.getKeys(); 462 mKeys = keys.toArray(new Key[keys.size()]); 463 requestLayout(); 464 // Hint to reallocate the buffer if the size changed 465 mKeyboardChanged = true; 466 invalidateAllKeys(); 467 computeProximityThreshold(keyboard); 468 mMiniKeyboardCache.clear(); // Not really necessary to do every time, but will free up views 469 // Switching to a different keyboard should abort any pending keys so that the key up 470 // doesn't get delivered to the old or new keyboard 471 mAbortKey = true; // Until the next ACTION_DOWN 472 } 473 474 /** 475 * Returns the current keyboard being displayed by this view. 476 * @return the currently attached keyboard 477 * @see #setKeyboard(Keyboard) 478 */ 479 public Keyboard getKeyboard() { 480 return mKeyboard; 481 } 482 483 /** 484 * Sets the state of the shift key of the keyboard, if any. 485 * @param shifted whether or not to enable the state of the shift key 486 * @return true if the shift key state changed, false if there was no change 487 * @see KeyboardView#isShifted() 488 */ 489 public boolean setShifted(boolean shifted) { 490 if (mKeyboard != null) { 491 if (mKeyboard.setShifted(shifted)) { 492 // The whole keyboard probably needs to be redrawn 493 invalidateAllKeys(); 494 return true; 495 } 496 } 497 return false; 498 } 499 500 /** 501 * Returns the state of the shift key of the keyboard, if any. 502 * @return true if the shift is in a pressed state, false otherwise. If there is 503 * no shift key on the keyboard or there is no keyboard attached, it returns false. 504 * @see KeyboardView#setShifted(boolean) 505 */ 506 public boolean isShifted() { 507 if (mKeyboard != null) { 508 return mKeyboard.isShifted(); 509 } 510 return false; 511 } 512 513 /** 514 * Enables or disables the key feedback popup. This is a popup that shows a magnified 515 * version of the depressed key. By default the preview is enabled. 516 * @param previewEnabled whether or not to enable the key feedback popup 517 * @see #isPreviewEnabled() 518 */ 519 public void setPreviewEnabled(boolean previewEnabled) { 520 mShowPreview = previewEnabled; 521 } 522 523 /** 524 * Returns the enabled state of the key feedback popup. 525 * @return whether or not the key feedback popup is enabled 526 * @see #setPreviewEnabled(boolean) 527 */ 528 public boolean isPreviewEnabled() { 529 return mShowPreview; 530 } 531 532 public void setVerticalCorrection(int verticalOffset) { 533 534 } 535 public void setPopupParent(View v) { 536 mPopupParent = v; 537 } 538 539 public void setPopupOffset(int x, int y) { 540 mMiniKeyboardOffsetX = x; 541 mMiniKeyboardOffsetY = y; 542 if (mPreviewPopup.isShowing()) { 543 mPreviewPopup.dismiss(); 544 } 545 } 546 547 /** 548 * When enabled, calls to {@link OnKeyboardActionListener#onKey} will include key 549 * codes for adjacent keys. When disabled, only the primary key code will be 550 * reported. 551 * @param enabled whether or not the proximity correction is enabled 552 */ 553 public void setProximityCorrectionEnabled(boolean enabled) { 554 mProximityCorrectOn = enabled; 555 } 556 557 /** 558 * Returns true if proximity correction is enabled. 559 */ 560 public boolean isProximityCorrectionEnabled() { 561 return mProximityCorrectOn; 562 } 563 564 /** 565 * Popup keyboard close button clicked. 566 * @hide 567 */ 568 public void onClick(View v) { 569 dismissPopupKeyboard(); 570 } 571 572 private CharSequence adjustCase(CharSequence label) { 573 if (mKeyboard.isShifted() && label != null && label.length() < 3 574 && Character.isLowerCase(label.charAt(0))) { 575 label = label.toString().toUpperCase(); 576 } 577 return label; 578 } 579 580 @Override 581 public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 582 // Round up a little 583 if (mKeyboard == null) { 584 setMeasuredDimension(mPaddingLeft + mPaddingRight, mPaddingTop + mPaddingBottom); 585 } else { 586 int width = mKeyboard.getMinWidth() + mPaddingLeft + mPaddingRight; 587 if (MeasureSpec.getSize(widthMeasureSpec) < width + 10) { 588 width = MeasureSpec.getSize(widthMeasureSpec); 589 } 590 setMeasuredDimension(width, mKeyboard.getHeight() + mPaddingTop + mPaddingBottom); 591 } 592 } 593 594 /** 595 * Compute the average distance between adjacent keys (horizontally and vertically) 596 * and square it to get the proximity threshold. We use a square here and in computing 597 * the touch distance from a key's center to avoid taking a square root. 598 * @param keyboard 599 */ 600 private void computeProximityThreshold(Keyboard keyboard) { 601 if (keyboard == null) return; 602 final Key[] keys = mKeys; 603 if (keys == null) return; 604 int length = keys.length; 605 int dimensionSum = 0; 606 for (int i = 0; i < length; i++) { 607 Key key = keys[i]; 608 dimensionSum += Math.min(key.width, key.height) + key.gap; 609 } 610 if (dimensionSum < 0 || length == 0) return; 611 mProximityThreshold = (int) (dimensionSum * 1.4f / length); 612 mProximityThreshold *= mProximityThreshold; // Square it 613 } 614 615 @Override 616 public void onSizeChanged(int w, int h, int oldw, int oldh) { 617 super.onSizeChanged(w, h, oldw, oldh); 618 // Release the buffer, if any and it will be reallocated on the next draw 619 mBuffer = null; 620 } 621 622 @Override 623 public void onDraw(Canvas canvas) { 624 super.onDraw(canvas); 625 if (mDrawPending || mBuffer == null || mKeyboardChanged) { 626 onBufferDraw(); 627 } 628 canvas.drawBitmap(mBuffer, 0, 0, null); 629 } 630 631 private void onBufferDraw() { 632 if (mBuffer == null || mKeyboardChanged) { 633 if (mBuffer == null || mKeyboardChanged && 634 (mBuffer.getWidth() != getWidth() || mBuffer.getHeight() != getHeight())) { 635 // Make sure our bitmap is at least 1x1 636 final int width = Math.max(1, getWidth()); 637 final int height = Math.max(1, getHeight()); 638 mBuffer = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888); 639 mCanvas = new Canvas(mBuffer); 640 } 641 invalidateAllKeys(); 642 mKeyboardChanged = false; 643 } 644 final Canvas canvas = mCanvas; 645 canvas.clipRect(mDirtyRect, Op.REPLACE); 646 647 if (mKeyboard == null) return; 648 649 final Paint paint = mPaint; 650 final Drawable keyBackground = mKeyBackground; 651 final Rect clipRegion = mClipRegion; 652 final Rect padding = mPadding; 653 final int kbdPaddingLeft = mPaddingLeft; 654 final int kbdPaddingTop = mPaddingTop; 655 final Key[] keys = mKeys; 656 final Key invalidKey = mInvalidatedKey; 657 658 paint.setColor(mKeyTextColor); 659 boolean drawSingleKey = false; 660 if (invalidKey != null && canvas.getClipBounds(clipRegion)) { 661 // Is clipRegion completely contained within the invalidated key? 662 if (invalidKey.x + kbdPaddingLeft - 1 <= clipRegion.left && 663 invalidKey.y + kbdPaddingTop - 1 <= clipRegion.top && 664 invalidKey.x + invalidKey.width + kbdPaddingLeft + 1 >= clipRegion.right && 665 invalidKey.y + invalidKey.height + kbdPaddingTop + 1 >= clipRegion.bottom) { 666 drawSingleKey = true; 667 } 668 } 669 canvas.drawColor(0x00000000, PorterDuff.Mode.CLEAR); 670 final int keyCount = keys.length; 671 for (int i = 0; i < keyCount; i++) { 672 final Key key = keys[i]; 673 if (drawSingleKey && invalidKey != key) { 674 continue; 675 } 676 int[] drawableState = key.getCurrentDrawableState(); 677 keyBackground.setState(drawableState); 678 679 // Switch the character to uppercase if shift is pressed 680 String label = key.label == null? null : adjustCase(key.label).toString(); 681 682 final Rect bounds = keyBackground.getBounds(); 683 if (key.width != bounds.right || 684 key.height != bounds.bottom) { 685 keyBackground.setBounds(0, 0, key.width, key.height); 686 } 687 canvas.translate(key.x + kbdPaddingLeft, key.y + kbdPaddingTop); 688 keyBackground.draw(canvas); 689 690 if (label != null) { 691 // For characters, use large font. For labels like "Done", use small font. 692 if (label.length() > 1 && key.codes.length < 2) { 693 paint.setTextSize(mLabelTextSize); 694 paint.setTypeface(Typeface.DEFAULT_BOLD); 695 } else { 696 paint.setTextSize(mKeyTextSize); 697 paint.setTypeface(Typeface.DEFAULT); 698 } 699 // Draw a drop shadow for the text 700 paint.setShadowLayer(mShadowRadius, 0, 0, mShadowColor); 701 // Draw the text 702 canvas.drawText(label, 703 (key.width - padding.left - padding.right) / 2 704 + padding.left, 705 (key.height - padding.top - padding.bottom) / 2 706 + (paint.getTextSize() - paint.descent()) / 2 + padding.top, 707 paint); 708 // Turn off drop shadow 709 paint.setShadowLayer(0, 0, 0, 0); 710 } else if (key.icon != null) { 711 final int drawableX = (key.width - padding.left - padding.right 712 - key.icon.getIntrinsicWidth()) / 2 + padding.left; 713 final int drawableY = (key.height - padding.top - padding.bottom 714 - key.icon.getIntrinsicHeight()) / 2 + padding.top; 715 canvas.translate(drawableX, drawableY); 716 key.icon.setBounds(0, 0, 717 key.icon.getIntrinsicWidth(), key.icon.getIntrinsicHeight()); 718 key.icon.draw(canvas); 719 canvas.translate(-drawableX, -drawableY); 720 } 721 canvas.translate(-key.x - kbdPaddingLeft, -key.y - kbdPaddingTop); 722 } 723 mInvalidatedKey = null; 724 // Overlay a dark rectangle to dim the keyboard 725 if (mMiniKeyboardOnScreen) { 726 paint.setColor((int) (mBackgroundDimAmount * 0xFF) << 24); 727 canvas.drawRect(0, 0, getWidth(), getHeight(), paint); 728 } 729 730 if (DEBUG && mShowTouchPoints) { 731 paint.setAlpha(128); 732 paint.setColor(0xFFFF0000); 733 canvas.drawCircle(mStartX, mStartY, 3, paint); 734 canvas.drawLine(mStartX, mStartY, mLastX, mLastY, paint); 735 paint.setColor(0xFF0000FF); 736 canvas.drawCircle(mLastX, mLastY, 3, paint); 737 paint.setColor(0xFF00FF00); 738 canvas.drawCircle((mStartX + mLastX) / 2, (mStartY + mLastY) / 2, 2, paint); 739 } 740 741 mDrawPending = false; 742 mDirtyRect.setEmpty(); 743 } 744 745 private int getKeyIndices(int x, int y, int[] allKeys) { 746 final Key[] keys = mKeys; 747 int primaryIndex = NOT_A_KEY; 748 int closestKey = NOT_A_KEY; 749 int closestKeyDist = mProximityThreshold + 1; 750 java.util.Arrays.fill(mDistances, Integer.MAX_VALUE); 751 int [] nearestKeyIndices = mKeyboard.getNearestKeys(x, y); 752 final int keyCount = nearestKeyIndices.length; 753 for (int i = 0; i < keyCount; i++) { 754 final Key key = keys[nearestKeyIndices[i]]; 755 int dist = 0; 756 boolean isInside = key.isInside(x,y); 757 if (isInside) { 758 primaryIndex = nearestKeyIndices[i]; 759 } 760 761 if (((mProximityCorrectOn 762 && (dist = key.squaredDistanceFrom(x, y)) < mProximityThreshold) 763 || isInside) 764 && key.codes[0] > 32) { 765 // Find insertion point 766 final int nCodes = key.codes.length; 767 if (dist < closestKeyDist) { 768 closestKeyDist = dist; 769 closestKey = nearestKeyIndices[i]; 770 } 771 772 if (allKeys == null) continue; 773 774 for (int j = 0; j < mDistances.length; j++) { 775 if (mDistances[j] > dist) { 776 // Make space for nCodes codes 777 System.arraycopy(mDistances, j, mDistances, j + nCodes, 778 mDistances.length - j - nCodes); 779 System.arraycopy(allKeys, j, allKeys, j + nCodes, 780 allKeys.length - j - nCodes); 781 for (int c = 0; c < nCodes; c++) { 782 allKeys[j + c] = key.codes[c]; 783 mDistances[j + c] = dist; 784 } 785 break; 786 } 787 } 788 } 789 } 790 if (primaryIndex == NOT_A_KEY) { 791 primaryIndex = closestKey; 792 } 793 return primaryIndex; 794 } 795 796 private void detectAndSendKey(int index, int x, int y, long eventTime) { 797 if (index != NOT_A_KEY && index < mKeys.length) { 798 final Key key = mKeys[index]; 799 if (key.text != null) { 800 mKeyboardActionListener.onText(key.text); 801 mKeyboardActionListener.onRelease(NOT_A_KEY); 802 } else { 803 int code = key.codes[0]; 804 //TextEntryState.keyPressedAt(key, x, y); 805 int[] codes = new int[MAX_NEARBY_KEYS]; 806 Arrays.fill(codes, NOT_A_KEY); 807 getKeyIndices(x, y, codes); 808 // Multi-tap 809 if (mInMultiTap) { 810 if (mTapCount != -1) { 811 mKeyboardActionListener.onKey(Keyboard.KEYCODE_DELETE, KEY_DELETE); 812 } else { 813 mTapCount = 0; 814 } 815 code = key.codes[mTapCount]; 816 } 817 mKeyboardActionListener.onKey(code, codes); 818 mKeyboardActionListener.onRelease(code); 819 } 820 mLastSentIndex = index; 821 mLastTapTime = eventTime; 822 } 823 } 824 825 /** 826 * Handle multi-tap keys by producing the key label for the current multi-tap state. 827 */ 828 private CharSequence getPreviewText(Key key) { 829 if (mInMultiTap) { 830 // Multi-tap 831 mPreviewLabel.setLength(0); 832 mPreviewLabel.append((char) key.codes[mTapCount < 0 ? 0 : mTapCount]); 833 return adjustCase(mPreviewLabel); 834 } else { 835 return adjustCase(key.label); 836 } 837 } 838 839 private void showPreview(int keyIndex) { 840 int oldKeyIndex = mCurrentKeyIndex; 841 final PopupWindow previewPopup = mPreviewPopup; 842 843 mCurrentKeyIndex = keyIndex; 844 // Release the old key and press the new key 845 final Key[] keys = mKeys; 846 if (oldKeyIndex != mCurrentKeyIndex) { 847 if (oldKeyIndex != NOT_A_KEY && keys.length > oldKeyIndex) { 848 Key oldKey = keys[oldKeyIndex]; 849 oldKey.onReleased(mCurrentKeyIndex == NOT_A_KEY); 850 invalidateKey(oldKeyIndex); 851 sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_HOVER_EXIT, oldKey.codes[0]); 852 } 853 if (mCurrentKeyIndex != NOT_A_KEY && keys.length > mCurrentKeyIndex) { 854 Key newKey = keys[mCurrentKeyIndex]; 855 newKey.onPressed(); 856 invalidateKey(mCurrentKeyIndex); 857 sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_HOVER_ENTER, newKey.codes[0]); 858 } 859 } 860 // If key changed and preview is on ... 861 if (oldKeyIndex != mCurrentKeyIndex && mShowPreview) { 862 mHandler.removeMessages(MSG_SHOW_PREVIEW); 863 if (previewPopup.isShowing()) { 864 if (keyIndex == NOT_A_KEY) { 865 mHandler.sendMessageDelayed(mHandler 866 .obtainMessage(MSG_REMOVE_PREVIEW), 867 DELAY_AFTER_PREVIEW); 868 } 869 } 870 if (keyIndex != NOT_A_KEY) { 871 if (previewPopup.isShowing() && mPreviewText.getVisibility() == VISIBLE) { 872 // Show right away, if it's already visible and finger is moving around 873 showKey(keyIndex); 874 } else { 875 mHandler.sendMessageDelayed( 876 mHandler.obtainMessage(MSG_SHOW_PREVIEW, keyIndex, 0), 877 DELAY_BEFORE_PREVIEW); 878 } 879 } 880 } 881 } 882 883 private void showKey(final int keyIndex) { 884 final PopupWindow previewPopup = mPreviewPopup; 885 final Key[] keys = mKeys; 886 if (keyIndex < 0 || keyIndex >= mKeys.length) return; 887 Key key = keys[keyIndex]; 888 if (key.icon != null) { 889 mPreviewText.setCompoundDrawables(null, null, null, 890 key.iconPreview != null ? key.iconPreview : key.icon); 891 mPreviewText.setText(null); 892 } else { 893 mPreviewText.setCompoundDrawables(null, null, null, null); 894 mPreviewText.setText(getPreviewText(key)); 895 if (key.label.length() > 1 && key.codes.length < 2) { 896 mPreviewText.setTextSize(TypedValue.COMPLEX_UNIT_PX, mKeyTextSize); 897 mPreviewText.setTypeface(Typeface.DEFAULT_BOLD); 898 } else { 899 mPreviewText.setTextSize(TypedValue.COMPLEX_UNIT_PX, mPreviewTextSizeLarge); 900 mPreviewText.setTypeface(Typeface.DEFAULT); 901 } 902 } 903 mPreviewText.measure(MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED), 904 MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED)); 905 int popupWidth = Math.max(mPreviewText.getMeasuredWidth(), key.width 906 + mPreviewText.getPaddingLeft() + mPreviewText.getPaddingRight()); 907 final int popupHeight = mPreviewHeight; 908 LayoutParams lp = mPreviewText.getLayoutParams(); 909 if (lp != null) { 910 lp.width = popupWidth; 911 lp.height = popupHeight; 912 } 913 if (!mPreviewCentered) { 914 mPopupPreviewX = key.x - mPreviewText.getPaddingLeft() + mPaddingLeft; 915 mPopupPreviewY = key.y - popupHeight + mPreviewOffset; 916 } else { 917 // TODO: Fix this if centering is brought back 918 mPopupPreviewX = 160 - mPreviewText.getMeasuredWidth() / 2; 919 mPopupPreviewY = - mPreviewText.getMeasuredHeight(); 920 } 921 mHandler.removeMessages(MSG_REMOVE_PREVIEW); 922 getLocationInWindow(mCoordinates); 923 mCoordinates[0] += mMiniKeyboardOffsetX; // Offset may be zero 924 mCoordinates[1] += mMiniKeyboardOffsetY; // Offset may be zero 925 926 // Set the preview background state 927 mPreviewText.getBackground().setState( 928 key.popupResId != 0 ? LONG_PRESSABLE_STATE_SET : EMPTY_STATE_SET); 929 mPopupPreviewX += mCoordinates[0]; 930 mPopupPreviewY += mCoordinates[1]; 931 932 // If the popup cannot be shown above the key, put it on the side 933 getLocationOnScreen(mCoordinates); 934 if (mPopupPreviewY + mCoordinates[1] < 0) { 935 // If the key you're pressing is on the left side of the keyboard, show the popup on 936 // the right, offset by enough to see at least one key to the left/right. 937 if (key.x + key.width <= getWidth() / 2) { 938 mPopupPreviewX += (int) (key.width * 2.5); 939 } else { 940 mPopupPreviewX -= (int) (key.width * 2.5); 941 } 942 mPopupPreviewY += popupHeight; 943 } 944 945 if (previewPopup.isShowing()) { 946 previewPopup.update(mPopupPreviewX, mPopupPreviewY, 947 popupWidth, popupHeight); 948 } else { 949 previewPopup.setWidth(popupWidth); 950 previewPopup.setHeight(popupHeight); 951 previewPopup.showAtLocation(mPopupParent, Gravity.NO_GRAVITY, 952 mPopupPreviewX, mPopupPreviewY); 953 } 954 mPreviewText.setVisibility(VISIBLE); 955 } 956 957 private void sendAccessibilityEvent(int eventType, int code) { 958 if (mAccessibilityManager.isEnabled()) { 959 AccessibilityEvent event = AccessibilityEvent.obtain(eventType); 960 onInitializeAccessibilityEvent(event); 961 // Add text only if headset is used to avoid leaking passwords. 962 if (mAudioManager.isBluetoothA2dpOn() || mAudioManager.isWiredHeadsetOn()) { 963 String text = null; 964 switch (code) { 965 case Keyboard.KEYCODE_ALT: 966 text = mContext.getString(R.string.keyboardview_keycode_alt); 967 break; 968 case Keyboard.KEYCODE_CANCEL: 969 text = mContext.getString(R.string.keyboardview_keycode_cancel); 970 break; 971 case Keyboard.KEYCODE_DELETE: 972 text = mContext.getString(R.string.keyboardview_keycode_delete); 973 break; 974 case Keyboard.KEYCODE_DONE: 975 text = mContext.getString(R.string.keyboardview_keycode_done); 976 break; 977 case Keyboard.KEYCODE_MODE_CHANGE: 978 text = mContext.getString(R.string.keyboardview_keycode_mode_change); 979 break; 980 case Keyboard.KEYCODE_SHIFT: 981 text = mContext.getString(R.string.keyboardview_keycode_shift); 982 break; 983 case '\n': 984 text = mContext.getString(R.string.keyboardview_keycode_enter); 985 break; 986 default: 987 text = String.valueOf((char) code); 988 } 989 event.getText().add(text); 990 } else { 991 event.getText().add(mContext.getString( 992 R.string.keyboard_headset_required_to_hear_password)); 993 } 994 mAccessibilityManager.sendAccessibilityEvent(event); 995 } 996 } 997 998 /** 999 * Requests a redraw of the entire keyboard. Calling {@link #invalidate} is not sufficient 1000 * because the keyboard renders the keys to an off-screen buffer and an invalidate() only 1001 * draws the cached buffer. 1002 * @see #invalidateKey(int) 1003 */ 1004 public void invalidateAllKeys() { 1005 mDirtyRect.union(0, 0, getWidth(), getHeight()); 1006 mDrawPending = true; 1007 invalidate(); 1008 } 1009 1010 /** 1011 * Invalidates a key so that it will be redrawn on the next repaint. Use this method if only 1012 * one key is changing it's content. Any changes that affect the position or size of the key 1013 * may not be honored. 1014 * @param keyIndex the index of the key in the attached {@link Keyboard}. 1015 * @see #invalidateAllKeys 1016 */ 1017 public void invalidateKey(int keyIndex) { 1018 if (mKeys == null) return; 1019 if (keyIndex < 0 || keyIndex >= mKeys.length) { 1020 return; 1021 } 1022 final Key key = mKeys[keyIndex]; 1023 mInvalidatedKey = key; 1024 mDirtyRect.union(key.x + mPaddingLeft, key.y + mPaddingTop, 1025 key.x + key.width + mPaddingLeft, key.y + key.height + mPaddingTop); 1026 onBufferDraw(); 1027 invalidate(key.x + mPaddingLeft, key.y + mPaddingTop, 1028 key.x + key.width + mPaddingLeft, key.y + key.height + mPaddingTop); 1029 } 1030 1031 private boolean openPopupIfRequired(MotionEvent me) { 1032 // Check if we have a popup layout specified first. 1033 if (mPopupLayout == 0) { 1034 return false; 1035 } 1036 if (mCurrentKey < 0 || mCurrentKey >= mKeys.length) { 1037 return false; 1038 } 1039 1040 Key popupKey = mKeys[mCurrentKey]; 1041 boolean result = onLongPress(popupKey); 1042 if (result) { 1043 mAbortKey = true; 1044 showPreview(NOT_A_KEY); 1045 } 1046 return result; 1047 } 1048 1049 /** 1050 * Called when a key is long pressed. By default this will open any popup keyboard associated 1051 * with this key through the attributes popupLayout and popupCharacters. 1052 * @param popupKey the key that was long pressed 1053 * @return true if the long press is handled, false otherwise. Subclasses should call the 1054 * method on the base class if the subclass doesn't wish to handle the call. 1055 */ 1056 protected boolean onLongPress(Key popupKey) { 1057 int popupKeyboardId = popupKey.popupResId; 1058 1059 if (popupKeyboardId != 0) { 1060 mMiniKeyboardContainer = mMiniKeyboardCache.get(popupKey); 1061 if (mMiniKeyboardContainer == null) { 1062 LayoutInflater inflater = (LayoutInflater) getContext().getSystemService( 1063 Context.LAYOUT_INFLATER_SERVICE); 1064 mMiniKeyboardContainer = inflater.inflate(mPopupLayout, null); 1065 mMiniKeyboard = (KeyboardView) mMiniKeyboardContainer.findViewById( 1066 com.android.internal.R.id.keyboardView); 1067 View closeButton = mMiniKeyboardContainer.findViewById( 1068 com.android.internal.R.id.closeButton); 1069 if (closeButton != null) closeButton.setOnClickListener(this); 1070 mMiniKeyboard.setOnKeyboardActionListener(new OnKeyboardActionListener() { 1071 public void onKey(int primaryCode, int[] keyCodes) { 1072 mKeyboardActionListener.onKey(primaryCode, keyCodes); 1073 dismissPopupKeyboard(); 1074 } 1075 1076 public void onText(CharSequence text) { 1077 mKeyboardActionListener.onText(text); 1078 dismissPopupKeyboard(); 1079 } 1080 1081 public void swipeLeft() { } 1082 public void swipeRight() { } 1083 public void swipeUp() { } 1084 public void swipeDown() { } 1085 public void onPress(int primaryCode) { 1086 mKeyboardActionListener.onPress(primaryCode); 1087 } 1088 public void onRelease(int primaryCode) { 1089 mKeyboardActionListener.onRelease(primaryCode); 1090 } 1091 }); 1092 //mInputView.setSuggest(mSuggest); 1093 Keyboard keyboard; 1094 if (popupKey.popupCharacters != null) { 1095 keyboard = new Keyboard(getContext(), popupKeyboardId, 1096 popupKey.popupCharacters, -1, getPaddingLeft() + getPaddingRight()); 1097 } else { 1098 keyboard = new Keyboard(getContext(), popupKeyboardId); 1099 } 1100 mMiniKeyboard.setKeyboard(keyboard); 1101 mMiniKeyboard.setPopupParent(this); 1102 mMiniKeyboardContainer.measure( 1103 MeasureSpec.makeMeasureSpec(getWidth(), MeasureSpec.AT_MOST), 1104 MeasureSpec.makeMeasureSpec(getHeight(), MeasureSpec.AT_MOST)); 1105 1106 mMiniKeyboardCache.put(popupKey, mMiniKeyboardContainer); 1107 } else { 1108 mMiniKeyboard = (KeyboardView) mMiniKeyboardContainer.findViewById( 1109 com.android.internal.R.id.keyboardView); 1110 } 1111 getLocationInWindow(mCoordinates); 1112 mPopupX = popupKey.x + mPaddingLeft; 1113 mPopupY = popupKey.y + mPaddingTop; 1114 mPopupX = mPopupX + popupKey.width - mMiniKeyboardContainer.getMeasuredWidth(); 1115 mPopupY = mPopupY - mMiniKeyboardContainer.getMeasuredHeight(); 1116 final int x = mPopupX + mMiniKeyboardContainer.getPaddingRight() + mCoordinates[0]; 1117 final int y = mPopupY + mMiniKeyboardContainer.getPaddingBottom() + mCoordinates[1]; 1118 mMiniKeyboard.setPopupOffset(x < 0 ? 0 : x, y); 1119 mMiniKeyboard.setShifted(isShifted()); 1120 mPopupKeyboard.setContentView(mMiniKeyboardContainer); 1121 mPopupKeyboard.setWidth(mMiniKeyboardContainer.getMeasuredWidth()); 1122 mPopupKeyboard.setHeight(mMiniKeyboardContainer.getMeasuredHeight()); 1123 mPopupKeyboard.showAtLocation(this, Gravity.NO_GRAVITY, x, y); 1124 mMiniKeyboardOnScreen = true; 1125 //mMiniKeyboard.onTouchEvent(getTranslatedEvent(me)); 1126 invalidateAllKeys(); 1127 return true; 1128 } 1129 return false; 1130 } 1131 1132 @Override 1133 protected boolean dispatchHoverEvent(MotionEvent event) { 1134 // If touch exploring is enabled we ignore touch events and transform 1135 // the stream of hover events as touch events. This allows one consistent 1136 // event stream to drive the keyboard since during touch exploring the 1137 // first touch generates only hover events and tapping on the same 1138 // location generates hover and touch events. 1139 if (mAccessibilityManager.isEnabled() 1140 && mAccessibilityManager.isTouchExplorationEnabled() 1141 && event.getPointerCount() == 1) { 1142 final int action = event.getAction(); 1143 switch (action) { 1144 case MotionEvent.ACTION_HOVER_ENTER: 1145 event.setAction(MotionEvent.ACTION_DOWN); 1146 break; 1147 case MotionEvent.ACTION_HOVER_MOVE: 1148 event.setAction(MotionEvent.ACTION_MOVE); 1149 break; 1150 case MotionEvent.ACTION_HOVER_EXIT: 1151 event.setAction(MotionEvent.ACTION_UP); 1152 break; 1153 } 1154 onTouchEventInternal(event); 1155 return true; 1156 } 1157 return super.dispatchHoverEvent(event); 1158 } 1159 1160 @Override 1161 public boolean onTouchEvent(MotionEvent event) { 1162 // If touch exploring is enabled we ignore touch events and transform 1163 // the stream of hover events as touch events. This allows one consistent 1164 // event stream to drive the keyboard since during touch exploring the 1165 // first touch generates only hover events and tapping on the same 1166 // location generates hover and touch events. 1167 if (mAccessibilityManager.isEnabled() 1168 && mAccessibilityManager.isTouchExplorationEnabled()) { 1169 return true; 1170 } 1171 return onTouchEventInternal(event); 1172 } 1173 1174 private boolean onTouchEventInternal(MotionEvent me) { 1175 // Convert multi-pointer up/down events to single up/down events to 1176 // deal with the typical multi-pointer behavior of two-thumb typing 1177 final int pointerCount = me.getPointerCount(); 1178 final int action = me.getAction(); 1179 boolean result = false; 1180 final long now = me.getEventTime(); 1181 1182 if (pointerCount != mOldPointerCount) { 1183 if (pointerCount == 1) { 1184 // Send a down event for the latest pointer 1185 MotionEvent down = MotionEvent.obtain(now, now, MotionEvent.ACTION_DOWN, 1186 me.getX(), me.getY(), me.getMetaState()); 1187 result = onModifiedTouchEvent(down, false); 1188 down.recycle(); 1189 // If it's an up action, then deliver the up as well. 1190 if (action == MotionEvent.ACTION_UP) { 1191 result = onModifiedTouchEvent(me, true); 1192 } 1193 } else { 1194 // Send an up event for the last pointer 1195 MotionEvent up = MotionEvent.obtain(now, now, MotionEvent.ACTION_UP, 1196 mOldPointerX, mOldPointerY, me.getMetaState()); 1197 result = onModifiedTouchEvent(up, true); 1198 up.recycle(); 1199 } 1200 } else { 1201 if (pointerCount == 1) { 1202 result = onModifiedTouchEvent(me, false); 1203 mOldPointerX = me.getX(); 1204 mOldPointerY = me.getY(); 1205 } else { 1206 // Don't do anything when 2 pointers are down and moving. 1207 result = true; 1208 } 1209 } 1210 mOldPointerCount = pointerCount; 1211 1212 return result; 1213 } 1214 1215 private boolean onModifiedTouchEvent(MotionEvent me, boolean possiblePoly) { 1216 int touchX = (int) me.getX() - mPaddingLeft; 1217 int touchY = (int) me.getY() - mPaddingTop; 1218 if (touchY >= -mVerticalCorrection) 1219 touchY += mVerticalCorrection; 1220 final int action = me.getAction(); 1221 final long eventTime = me.getEventTime(); 1222 int keyIndex = getKeyIndices(touchX, touchY, null); 1223 mPossiblePoly = possiblePoly; 1224 1225 // Track the last few movements to look for spurious swipes. 1226 if (action == MotionEvent.ACTION_DOWN) mSwipeTracker.clear(); 1227 mSwipeTracker.addMovement(me); 1228 1229 // Ignore all motion events until a DOWN. 1230 if (mAbortKey 1231 && action != MotionEvent.ACTION_DOWN && action != MotionEvent.ACTION_CANCEL) { 1232 return true; 1233 } 1234 1235 if (mGestureDetector.onTouchEvent(me)) { 1236 showPreview(NOT_A_KEY); 1237 mHandler.removeMessages(MSG_REPEAT); 1238 mHandler.removeMessages(MSG_LONGPRESS); 1239 return true; 1240 } 1241 1242 // Needs to be called after the gesture detector gets a turn, as it may have 1243 // displayed the mini keyboard 1244 if (mMiniKeyboardOnScreen && action != MotionEvent.ACTION_CANCEL) { 1245 return true; 1246 } 1247 1248 switch (action) { 1249 case MotionEvent.ACTION_DOWN: 1250 mAbortKey = false; 1251 mStartX = touchX; 1252 mStartY = touchY; 1253 mLastCodeX = touchX; 1254 mLastCodeY = touchY; 1255 mLastKeyTime = 0; 1256 mCurrentKeyTime = 0; 1257 mLastKey = NOT_A_KEY; 1258 mCurrentKey = keyIndex; 1259 mDownKey = keyIndex; 1260 mDownTime = me.getEventTime(); 1261 mLastMoveTime = mDownTime; 1262 checkMultiTap(eventTime, keyIndex); 1263 mKeyboardActionListener.onPress(keyIndex != NOT_A_KEY ? 1264 mKeys[keyIndex].codes[0] : 0); 1265 if (mCurrentKey >= 0 && mKeys[mCurrentKey].repeatable) { 1266 mRepeatKeyIndex = mCurrentKey; 1267 Message msg = mHandler.obtainMessage(MSG_REPEAT); 1268 mHandler.sendMessageDelayed(msg, REPEAT_START_DELAY); 1269 repeatKey(); 1270 // Delivering the key could have caused an abort 1271 if (mAbortKey) { 1272 mRepeatKeyIndex = NOT_A_KEY; 1273 break; 1274 } 1275 } 1276 if (mCurrentKey != NOT_A_KEY) { 1277 Message msg = mHandler.obtainMessage(MSG_LONGPRESS, me); 1278 mHandler.sendMessageDelayed(msg, LONGPRESS_TIMEOUT); 1279 } 1280 showPreview(keyIndex); 1281 break; 1282 1283 case MotionEvent.ACTION_MOVE: 1284 boolean continueLongPress = false; 1285 if (keyIndex != NOT_A_KEY) { 1286 if (mCurrentKey == NOT_A_KEY) { 1287 mCurrentKey = keyIndex; 1288 mCurrentKeyTime = eventTime - mDownTime; 1289 } else { 1290 if (keyIndex == mCurrentKey) { 1291 mCurrentKeyTime += eventTime - mLastMoveTime; 1292 continueLongPress = true; 1293 } else if (mRepeatKeyIndex == NOT_A_KEY) { 1294 resetMultiTap(); 1295 mLastKey = mCurrentKey; 1296 mLastCodeX = mLastX; 1297 mLastCodeY = mLastY; 1298 mLastKeyTime = 1299 mCurrentKeyTime + eventTime - mLastMoveTime; 1300 mCurrentKey = keyIndex; 1301 mCurrentKeyTime = 0; 1302 } 1303 } 1304 } 1305 if (!continueLongPress) { 1306 // Cancel old longpress 1307 mHandler.removeMessages(MSG_LONGPRESS); 1308 // Start new longpress if key has changed 1309 if (keyIndex != NOT_A_KEY) { 1310 Message msg = mHandler.obtainMessage(MSG_LONGPRESS, me); 1311 mHandler.sendMessageDelayed(msg, LONGPRESS_TIMEOUT); 1312 } 1313 } 1314 showPreview(mCurrentKey); 1315 mLastMoveTime = eventTime; 1316 break; 1317 1318 case MotionEvent.ACTION_UP: 1319 removeMessages(); 1320 if (keyIndex == mCurrentKey) { 1321 mCurrentKeyTime += eventTime - mLastMoveTime; 1322 } else { 1323 resetMultiTap(); 1324 mLastKey = mCurrentKey; 1325 mLastKeyTime = mCurrentKeyTime + eventTime - mLastMoveTime; 1326 mCurrentKey = keyIndex; 1327 mCurrentKeyTime = 0; 1328 } 1329 if (mCurrentKeyTime < mLastKeyTime && mCurrentKeyTime < DEBOUNCE_TIME 1330 && mLastKey != NOT_A_KEY) { 1331 mCurrentKey = mLastKey; 1332 touchX = mLastCodeX; 1333 touchY = mLastCodeY; 1334 } 1335 showPreview(NOT_A_KEY); 1336 Arrays.fill(mKeyIndices, NOT_A_KEY); 1337 // If we're not on a repeating key (which sends on a DOWN event) 1338 if (mRepeatKeyIndex == NOT_A_KEY && !mMiniKeyboardOnScreen && !mAbortKey) { 1339 detectAndSendKey(mCurrentKey, touchX, touchY, eventTime); 1340 } 1341 invalidateKey(keyIndex); 1342 mRepeatKeyIndex = NOT_A_KEY; 1343 break; 1344 case MotionEvent.ACTION_CANCEL: 1345 removeMessages(); 1346 dismissPopupKeyboard(); 1347 mAbortKey = true; 1348 showPreview(NOT_A_KEY); 1349 invalidateKey(mCurrentKey); 1350 break; 1351 } 1352 mLastX = touchX; 1353 mLastY = touchY; 1354 return true; 1355 } 1356 1357 private boolean repeatKey() { 1358 Key key = mKeys[mRepeatKeyIndex]; 1359 detectAndSendKey(mCurrentKey, key.x, key.y, mLastTapTime); 1360 return true; 1361 } 1362 1363 protected void swipeRight() { 1364 mKeyboardActionListener.swipeRight(); 1365 } 1366 1367 protected void swipeLeft() { 1368 mKeyboardActionListener.swipeLeft(); 1369 } 1370 1371 protected void swipeUp() { 1372 mKeyboardActionListener.swipeUp(); 1373 } 1374 1375 protected void swipeDown() { 1376 mKeyboardActionListener.swipeDown(); 1377 } 1378 1379 public void closing() { 1380 if (mPreviewPopup.isShowing()) { 1381 mPreviewPopup.dismiss(); 1382 } 1383 removeMessages(); 1384 1385 dismissPopupKeyboard(); 1386 mBuffer = null; 1387 mCanvas = null; 1388 mMiniKeyboardCache.clear(); 1389 } 1390 1391 private void removeMessages() { 1392 mHandler.removeMessages(MSG_REPEAT); 1393 mHandler.removeMessages(MSG_LONGPRESS); 1394 mHandler.removeMessages(MSG_SHOW_PREVIEW); 1395 } 1396 1397 @Override 1398 public void onDetachedFromWindow() { 1399 super.onDetachedFromWindow(); 1400 closing(); 1401 } 1402 1403 private void dismissPopupKeyboard() { 1404 if (mPopupKeyboard.isShowing()) { 1405 mPopupKeyboard.dismiss(); 1406 mMiniKeyboardOnScreen = false; 1407 invalidateAllKeys(); 1408 } 1409 } 1410 1411 public boolean handleBack() { 1412 if (mPopupKeyboard.isShowing()) { 1413 dismissPopupKeyboard(); 1414 return true; 1415 } 1416 return false; 1417 } 1418 1419 private void resetMultiTap() { 1420 mLastSentIndex = NOT_A_KEY; 1421 mTapCount = 0; 1422 mLastTapTime = -1; 1423 mInMultiTap = false; 1424 } 1425 1426 private void checkMultiTap(long eventTime, int keyIndex) { 1427 if (keyIndex == NOT_A_KEY) return; 1428 Key key = mKeys[keyIndex]; 1429 if (key.codes.length > 1) { 1430 mInMultiTap = true; 1431 if (eventTime < mLastTapTime + MULTITAP_INTERVAL 1432 && keyIndex == mLastSentIndex) { 1433 mTapCount = (mTapCount + 1) % key.codes.length; 1434 return; 1435 } else { 1436 mTapCount = -1; 1437 return; 1438 } 1439 } 1440 if (eventTime > mLastTapTime + MULTITAP_INTERVAL || keyIndex != mLastSentIndex) { 1441 resetMultiTap(); 1442 } 1443 } 1444 1445 private static class SwipeTracker { 1446 1447 static final int NUM_PAST = 4; 1448 static final int LONGEST_PAST_TIME = 200; 1449 1450 final float mPastX[] = new float[NUM_PAST]; 1451 final float mPastY[] = new float[NUM_PAST]; 1452 final long mPastTime[] = new long[NUM_PAST]; 1453 1454 float mYVelocity; 1455 float mXVelocity; 1456 1457 public void clear() { 1458 mPastTime[0] = 0; 1459 } 1460 1461 public void addMovement(MotionEvent ev) { 1462 long time = ev.getEventTime(); 1463 final int N = ev.getHistorySize(); 1464 for (int i=0; i<N; i++) { 1465 addPoint(ev.getHistoricalX(i), ev.getHistoricalY(i), 1466 ev.getHistoricalEventTime(i)); 1467 } 1468 addPoint(ev.getX(), ev.getY(), time); 1469 } 1470 1471 private void addPoint(float x, float y, long time) { 1472 int drop = -1; 1473 int i; 1474 final long[] pastTime = mPastTime; 1475 for (i=0; i<NUM_PAST; i++) { 1476 if (pastTime[i] == 0) { 1477 break; 1478 } else if (pastTime[i] < time-LONGEST_PAST_TIME) { 1479 drop = i; 1480 } 1481 } 1482 if (i == NUM_PAST && drop < 0) { 1483 drop = 0; 1484 } 1485 if (drop == i) drop--; 1486 final float[] pastX = mPastX; 1487 final float[] pastY = mPastY; 1488 if (drop >= 0) { 1489 final int start = drop+1; 1490 final int count = NUM_PAST-drop-1; 1491 System.arraycopy(pastX, start, pastX, 0, count); 1492 System.arraycopy(pastY, start, pastY, 0, count); 1493 System.arraycopy(pastTime, start, pastTime, 0, count); 1494 i -= (drop+1); 1495 } 1496 pastX[i] = x; 1497 pastY[i] = y; 1498 pastTime[i] = time; 1499 i++; 1500 if (i < NUM_PAST) { 1501 pastTime[i] = 0; 1502 } 1503 } 1504 1505 public void computeCurrentVelocity(int units) { 1506 computeCurrentVelocity(units, Float.MAX_VALUE); 1507 } 1508 1509 public void computeCurrentVelocity(int units, float maxVelocity) { 1510 final float[] pastX = mPastX; 1511 final float[] pastY = mPastY; 1512 final long[] pastTime = mPastTime; 1513 1514 final float oldestX = pastX[0]; 1515 final float oldestY = pastY[0]; 1516 final long oldestTime = pastTime[0]; 1517 float accumX = 0; 1518 float accumY = 0; 1519 int N=0; 1520 while (N < NUM_PAST) { 1521 if (pastTime[N] == 0) { 1522 break; 1523 } 1524 N++; 1525 } 1526 1527 for (int i=1; i < N; i++) { 1528 final int dur = (int)(pastTime[i] - oldestTime); 1529 if (dur == 0) continue; 1530 float dist = pastX[i] - oldestX; 1531 float vel = (dist/dur) * units; // pixels/frame. 1532 if (accumX == 0) accumX = vel; 1533 else accumX = (accumX + vel) * .5f; 1534 1535 dist = pastY[i] - oldestY; 1536 vel = (dist/dur) * units; // pixels/frame. 1537 if (accumY == 0) accumY = vel; 1538 else accumY = (accumY + vel) * .5f; 1539 } 1540 mXVelocity = accumX < 0.0f ? Math.max(accumX, -maxVelocity) 1541 : Math.min(accumX, maxVelocity); 1542 mYVelocity = accumY < 0.0f ? Math.max(accumY, -maxVelocity) 1543 : Math.min(accumY, maxVelocity); 1544 } 1545 1546 public float getXVelocity() { 1547 return mXVelocity; 1548 } 1549 1550 public float getYVelocity() { 1551 return mYVelocity; 1552 } 1553 } 1554} 1555