KeyboardView.java revision f04da95400e409dbb4ba33653f075bc76e091ef1
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.os.Handler; 32import android.os.Message; 33import android.os.SystemClock; 34import android.util.AttributeSet; 35import android.view.GestureDetector; 36import android.view.Gravity; 37import android.view.LayoutInflater; 38import android.view.MotionEvent; 39import android.view.View; 40import android.view.ViewGroup.LayoutParams; 41import android.widget.PopupWindow; 42import android.widget.TextView; 43 44import com.android.internal.R; 45 46import java.util.Arrays; 47import java.util.HashMap; 48import java.util.List; 49import java.util.Map; 50 51/** 52 * A view that renders a virtual {@link Keyboard}. It handles rendering of keys and 53 * detecting key presses and touch movements. 54 * 55 * @attr ref android.R.styleable#KeyboardView_keyBackground 56 * @attr ref android.R.styleable#KeyboardView_keyPreviewLayout 57 * @attr ref android.R.styleable#KeyboardView_keyPreviewOffset 58 * @attr ref android.R.styleable#KeyboardView_labelTextSize 59 * @attr ref android.R.styleable#KeyboardView_keyTextSize 60 * @attr ref android.R.styleable#KeyboardView_keyTextColor 61 * @attr ref android.R.styleable#KeyboardView_verticalCorrection 62 * @attr ref android.R.styleable#KeyboardView_popupLayout 63 */ 64public class KeyboardView extends View implements View.OnClickListener { 65 66 /** 67 * Listener for virtual keyboard events. 68 */ 69 public interface OnKeyboardActionListener { 70 71 /** 72 * Called when the user presses a key. This is sent before the {@link #onKey} is called. 73 * For keys that repeat, this is only called once. 74 * @param primaryCode the unicode of the key being pressed. If the touch is not on a valid 75 * key, the value will be zero. 76 */ 77 void onPress(int primaryCode); 78 79 /** 80 * Called when the user releases a key. This is sent after the {@link #onKey} is called. 81 * For keys that repeat, this is only called once. 82 * @param primaryCode the code of the key that was released 83 */ 84 void onRelease(int primaryCode); 85 86 /** 87 * Send a key press to the listener. 88 * @param primaryCode this is the key that was pressed 89 * @param keyCodes the codes for all the possible alternative keys 90 * with the primary code being the first. If the primary key code is 91 * a single character such as an alphabet or number or symbol, the alternatives 92 * will include other characters that may be on the same key or adjacent keys. 93 * These codes are useful to correct for accidental presses of a key adjacent to 94 * the intended key. 95 */ 96 void onKey(int primaryCode, int[] keyCodes); 97 98 /** 99 * Sends a sequence of characters to the listener. 100 * @param text the sequence of characters to be displayed. 101 */ 102 void onText(CharSequence text); 103 104 /** 105 * Called when the user quickly moves the finger from right to left. 106 */ 107 void swipeLeft(); 108 109 /** 110 * Called when the user quickly moves the finger from left to right. 111 */ 112 void swipeRight(); 113 114 /** 115 * Called when the user quickly moves the finger from up to down. 116 */ 117 void swipeDown(); 118 119 /** 120 * Called when the user quickly moves the finger from down to up. 121 */ 122 void swipeUp(); 123 } 124 125 private static final boolean DEBUG = false; 126 private static final int NOT_A_KEY = -1; 127 private static final int[] KEY_DELETE = { Keyboard.KEYCODE_DELETE }; 128 private static final int[] LONG_PRESSABLE_STATE_SET = { R.attr.state_long_pressable }; 129 130 private Keyboard mKeyboard; 131 private int mCurrentKeyIndex = NOT_A_KEY; 132 private int mLabelTextSize; 133 private int mKeyTextSize; 134 private int mKeyTextColor; 135 private float mShadowRadius; 136 private int mShadowColor; 137 private float mBackgroundDimAmount; 138 139 private TextView mPreviewText; 140 private PopupWindow mPreviewPopup; 141 private int mPreviewTextSizeLarge; 142 private int mPreviewOffset; 143 private int mPreviewHeight; 144 private int[] mOffsetInWindow; 145 146 private PopupWindow mPopupKeyboard; 147 private View mMiniKeyboardContainer; 148 private KeyboardView mMiniKeyboard; 149 private boolean mMiniKeyboardOnScreen; 150 private View mPopupParent; 151 private int mMiniKeyboardOffsetX; 152 private int mMiniKeyboardOffsetY; 153 private Map<Key,View> mMiniKeyboardCache; 154 private int[] mWindowOffset; 155 private Key[] mKeys; 156 157 /** Listener for {@link OnKeyboardActionListener}. */ 158 private OnKeyboardActionListener mKeyboardActionListener; 159 160 private static final int MSG_SHOW_PREVIEW = 1; 161 private static final int MSG_REMOVE_PREVIEW = 2; 162 private static final int MSG_REPEAT = 3; 163 private static final int MSG_LONGPRESS = 4; 164 165 private static final int DELAY_BEFORE_PREVIEW = 70; 166 private static final int DELAY_AFTER_PREVIEW = 60; 167 168 private int mVerticalCorrection; 169 private int mProximityThreshold; 170 171 private boolean mPreviewCentered = false; 172 private boolean mShowPreview = true; 173 private boolean mShowTouchPoints = true; 174 private int mPopupPreviewX; 175 private int mPopupPreviewY; 176 177 private int mLastX; 178 private int mLastY; 179 private int mStartX; 180 private int mStartY; 181 182 private boolean mProximityCorrectOn; 183 184 private Paint mPaint; 185 private Rect mPadding; 186 187 private long mDownTime; 188 private long mLastMoveTime; 189 private int mLastKey; 190 private int mLastCodeX; 191 private int mLastCodeY; 192 private int mCurrentKey = NOT_A_KEY; 193 private long mLastKeyTime; 194 private long mCurrentKeyTime; 195 private int[] mKeyIndices = new int[12]; 196 private GestureDetector mGestureDetector; 197 private int mPopupX; 198 private int mPopupY; 199 private int mRepeatKeyIndex = NOT_A_KEY; 200 private int mPopupLayout; 201 private boolean mAbortKey; 202 private Key mInvalidatedKey; 203 private Rect mClipRegion = new Rect(0, 0, 0, 0); 204 205 private Drawable mKeyBackground; 206 207 private static final int REPEAT_INTERVAL = 50; // ~20 keys per second 208 private static final int REPEAT_START_DELAY = 400; 209 private static final int LONGPRESS_TIMEOUT = 800; 210 // Deemed to be too short : ViewConfiguration.getLongPressTimeout(); 211 212 private static int MAX_NEARBY_KEYS = 12; 213 private int[] mDistances = new int[MAX_NEARBY_KEYS]; 214 215 // For multi-tap 216 private int mLastSentIndex; 217 private int mTapCount; 218 private long mLastTapTime; 219 private boolean mInMultiTap; 220 private static final int MULTITAP_INTERVAL = 800; // milliseconds 221 private StringBuilder mPreviewLabel = new StringBuilder(1); 222 223 /** Whether the keyboard bitmap needs to be redrawn before it's blitted. **/ 224 private boolean mDrawPending; 225 /** The dirty region in the keyboard bitmap */ 226 private Rect mDirtyRect = new Rect(); 227 /** The keyboard bitmap for faster updates */ 228 private Bitmap mBuffer; 229 /** The canvas for the above mutable keyboard bitmap */ 230 private Canvas mCanvas; 231 232 Handler mHandler = new Handler() { 233 @Override 234 public void handleMessage(Message msg) { 235 switch (msg.what) { 236 case MSG_SHOW_PREVIEW: 237 showKey(msg.arg1); 238 break; 239 case MSG_REMOVE_PREVIEW: 240 mPreviewText.setVisibility(INVISIBLE); 241 break; 242 case MSG_REPEAT: 243 if (repeatKey()) { 244 Message repeat = Message.obtain(this, MSG_REPEAT); 245 sendMessageDelayed(repeat, REPEAT_INTERVAL); 246 } 247 break; 248 case MSG_LONGPRESS: 249 openPopupIfRequired((MotionEvent) msg.obj); 250 break; 251 } 252 } 253 }; 254 255 public KeyboardView(Context context, AttributeSet attrs) { 256 this(context, attrs, com.android.internal.R.attr.keyboardViewStyle); 257 } 258 259 public KeyboardView(Context context, AttributeSet attrs, int defStyle) { 260 super(context, attrs, defStyle); 261 262 TypedArray a = 263 context.obtainStyledAttributes( 264 attrs, android.R.styleable.KeyboardView, defStyle, 0); 265 266 LayoutInflater inflate = 267 (LayoutInflater) context 268 .getSystemService(Context.LAYOUT_INFLATER_SERVICE); 269 270 int previewLayout = 0; 271 int keyTextSize = 0; 272 273 int n = a.getIndexCount(); 274 275 for (int i = 0; i < n; i++) { 276 int attr = a.getIndex(i); 277 278 switch (attr) { 279 case com.android.internal.R.styleable.KeyboardView_keyBackground: 280 mKeyBackground = a.getDrawable(attr); 281 break; 282 case com.android.internal.R.styleable.KeyboardView_verticalCorrection: 283 mVerticalCorrection = a.getDimensionPixelOffset(attr, 0); 284 break; 285 case com.android.internal.R.styleable.KeyboardView_keyPreviewLayout: 286 previewLayout = a.getResourceId(attr, 0); 287 break; 288 case com.android.internal.R.styleable.KeyboardView_keyPreviewOffset: 289 mPreviewOffset = a.getDimensionPixelOffset(attr, 0); 290 break; 291 case com.android.internal.R.styleable.KeyboardView_keyPreviewHeight: 292 mPreviewHeight = a.getDimensionPixelSize(attr, 80); 293 break; 294 case com.android.internal.R.styleable.KeyboardView_keyTextSize: 295 mKeyTextSize = a.getDimensionPixelSize(attr, 18); 296 break; 297 case com.android.internal.R.styleable.KeyboardView_keyTextColor: 298 mKeyTextColor = a.getColor(attr, 0xFF000000); 299 break; 300 case com.android.internal.R.styleable.KeyboardView_labelTextSize: 301 mLabelTextSize = a.getDimensionPixelSize(attr, 14); 302 break; 303 case com.android.internal.R.styleable.KeyboardView_popupLayout: 304 mPopupLayout = a.getResourceId(attr, 0); 305 break; 306 case com.android.internal.R.styleable.KeyboardView_shadowColor: 307 mShadowColor = a.getColor(attr, 0); 308 break; 309 case com.android.internal.R.styleable.KeyboardView_shadowRadius: 310 mShadowRadius = a.getFloat(attr, 0f); 311 break; 312 } 313 } 314 315 a = mContext.obtainStyledAttributes( 316 com.android.internal.R.styleable.Theme); 317 mBackgroundDimAmount = a.getFloat(android.R.styleable.Theme_backgroundDimAmount, 0.5f); 318 319 mPreviewPopup = new PopupWindow(context); 320 if (previewLayout != 0) { 321 mPreviewText = (TextView) inflate.inflate(previewLayout, null); 322 mPreviewTextSizeLarge = (int) mPreviewText.getTextSize(); 323 mPreviewPopup.setContentView(mPreviewText); 324 mPreviewPopup.setBackgroundDrawable(null); 325 } else { 326 mShowPreview = false; 327 } 328 329 mPreviewPopup.setTouchable(false); 330 331 mPopupKeyboard = new PopupWindow(context); 332 mPopupKeyboard.setBackgroundDrawable(null); 333 //mPopupKeyboard.setClippingEnabled(false); 334 335 mPopupParent = this; 336 //mPredicting = true; 337 338 mPaint = new Paint(); 339 mPaint.setAntiAlias(true); 340 mPaint.setTextSize(keyTextSize); 341 mPaint.setTextAlign(Align.CENTER); 342 343 mPadding = new Rect(0, 0, 0, 0); 344 mMiniKeyboardCache = new HashMap<Key,View>(); 345 mKeyBackground.getPadding(mPadding); 346 347 resetMultiTap(); 348 initGestureDetector(); 349 } 350 351 private void initGestureDetector() { 352 mGestureDetector = new GestureDetector(getContext(), new GestureDetector.SimpleOnGestureListener() { 353 @Override 354 public boolean onFling(MotionEvent me1, MotionEvent me2, 355 float velocityX, float velocityY) { 356 final float absX = Math.abs(velocityX); 357 final float absY = Math.abs(velocityY); 358 if (velocityX > 500 && absY < absX) { 359 swipeRight(); 360 return true; 361 } else if (velocityX < -500 && absY < absX) { 362 swipeLeft(); 363 return true; 364 } else if (velocityY < -500 && absX < absY) { 365 swipeUp(); 366 return true; 367 } else if (velocityY > 500 && absX < 200) { 368 swipeDown(); 369 return true; 370 } else if (absX > 800 || absY > 800) { 371 return true; 372 } 373 return false; 374 } 375 }); 376 377 mGestureDetector.setIsLongpressEnabled(false); 378 } 379 380 public void setOnKeyboardActionListener(OnKeyboardActionListener listener) { 381 mKeyboardActionListener = listener; 382 } 383 384 /** 385 * Returns the {@link OnKeyboardActionListener} object. 386 * @return the listener attached to this keyboard 387 */ 388 protected OnKeyboardActionListener getOnKeyboardActionListener() { 389 return mKeyboardActionListener; 390 } 391 392 /** 393 * Attaches a keyboard to this view. The keyboard can be switched at any time and the 394 * view will re-layout itself to accommodate the keyboard. 395 * @see Keyboard 396 * @see #getKeyboard() 397 * @param keyboard the keyboard to display in this view 398 */ 399 public void setKeyboard(Keyboard keyboard) { 400 if (mKeyboard != null) { 401 showPreview(NOT_A_KEY); 402 } 403 mKeyboard = keyboard; 404 List<Key> keys = mKeyboard.getKeys(); 405 mKeys = keys.toArray(new Key[keys.size()]); 406 requestLayout(); 407 // Release buffer, just in case the new keyboard has a different size. 408 // It will be reallocated on the next draw. 409 mBuffer = null; 410 invalidateAllKeys(); 411 computeProximityThreshold(keyboard); 412 mMiniKeyboardCache.clear(); // Not really necessary to do every time, but will free up views 413 } 414 415 /** 416 * Returns the current keyboard being displayed by this view. 417 * @return the currently attached keyboard 418 * @see #setKeyboard(Keyboard) 419 */ 420 public Keyboard getKeyboard() { 421 return mKeyboard; 422 } 423 424 /** 425 * Sets the state of the shift key of the keyboard, if any. 426 * @param shifted whether or not to enable the state of the shift key 427 * @return true if the shift key state changed, false if there was no change 428 * @see KeyboardView#isShifted() 429 */ 430 public boolean setShifted(boolean shifted) { 431 if (mKeyboard != null) { 432 if (mKeyboard.setShifted(shifted)) { 433 // The whole keyboard probably needs to be redrawn 434 invalidateAllKeys(); 435 return true; 436 } 437 } 438 return false; 439 } 440 441 /** 442 * Returns the state of the shift key of the keyboard, if any. 443 * @return true if the shift is in a pressed state, false otherwise. If there is 444 * no shift key on the keyboard or there is no keyboard attached, it returns false. 445 * @see KeyboardView#setShifted(boolean) 446 */ 447 public boolean isShifted() { 448 if (mKeyboard != null) { 449 return mKeyboard.isShifted(); 450 } 451 return false; 452 } 453 454 /** 455 * Enables or disables the key feedback popup. This is a popup that shows a magnified 456 * version of the depressed key. By default the preview is enabled. 457 * @param previewEnabled whether or not to enable the key feedback popup 458 * @see #isPreviewEnabled() 459 */ 460 public void setPreviewEnabled(boolean previewEnabled) { 461 mShowPreview = previewEnabled; 462 } 463 464 /** 465 * Returns the enabled state of the key feedback popup. 466 * @return whether or not the key feedback popup is enabled 467 * @see #setPreviewEnabled(boolean) 468 */ 469 public boolean isPreviewEnabled() { 470 return mShowPreview; 471 } 472 473 public void setVerticalCorrection(int verticalOffset) { 474 475 } 476 public void setPopupParent(View v) { 477 mPopupParent = v; 478 } 479 480 public void setPopupOffset(int x, int y) { 481 mMiniKeyboardOffsetX = x; 482 mMiniKeyboardOffsetY = y; 483 if (mPreviewPopup.isShowing()) { 484 mPreviewPopup.dismiss(); 485 } 486 } 487 488 /** 489 * When enabled, calls to {@link OnKeyboardActionListener#onKey} will include key 490 * codes for adjacent keys. When disabled, only the primary key code will be 491 * reported. 492 * @param enabled whether or not the proximity correction is enabled 493 */ 494 public void setProximityCorrectionEnabled(boolean enabled) { 495 mProximityCorrectOn = enabled; 496 } 497 498 /** 499 * Returns true if proximity correction is enabled. 500 */ 501 public boolean isProximityCorrectionEnabled() { 502 return mProximityCorrectOn; 503 } 504 505 /** 506 * Popup keyboard close button clicked. 507 * @hide 508 */ 509 public void onClick(View v) { 510 dismissPopupKeyboard(); 511 } 512 513 private CharSequence adjustCase(CharSequence label) { 514 if (mKeyboard.isShifted() && label != null && label.length() < 3 515 && Character.isLowerCase(label.charAt(0))) { 516 label = label.toString().toUpperCase(); 517 } 518 return label; 519 } 520 521 @Override 522 public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 523 // Round up a little 524 if (mKeyboard == null) { 525 setMeasuredDimension(mPaddingLeft + mPaddingRight, mPaddingTop + mPaddingBottom); 526 } else { 527 int width = mKeyboard.getMinWidth() + mPaddingLeft + mPaddingRight; 528 if (MeasureSpec.getSize(widthMeasureSpec) < width + 10) { 529 width = MeasureSpec.getSize(widthMeasureSpec); 530 } 531 setMeasuredDimension(width, mKeyboard.getHeight() + mPaddingTop + mPaddingBottom); 532 } 533 } 534 535 /** 536 * Compute the average distance between adjacent keys (horizontally and vertically) 537 * and square it to get the proximity threshold. We use a square here and in computing 538 * the touch distance from a key's center to avoid taking a square root. 539 * @param keyboard 540 */ 541 private void computeProximityThreshold(Keyboard keyboard) { 542 if (keyboard == null) return; 543 final Key[] keys = mKeys; 544 if (keys == null) return; 545 int length = keys.length; 546 int dimensionSum = 0; 547 for (int i = 0; i < length; i++) { 548 Key key = keys[i]; 549 dimensionSum += Math.min(key.width, key.height) + key.gap; 550 } 551 if (dimensionSum < 0 || length == 0) return; 552 mProximityThreshold = (int) (dimensionSum * 1.4f / length); 553 mProximityThreshold *= mProximityThreshold; // Square it 554 } 555 556 @Override 557 public void onSizeChanged(int w, int h, int oldw, int oldh) { 558 super.onSizeChanged(w, h, oldw, oldh); 559 // Release the buffer, if any and it will be reallocated on the next draw 560 mBuffer = null; 561 } 562 563 @Override 564 public void onDraw(Canvas canvas) { 565 super.onDraw(canvas); 566 if (mDrawPending || mBuffer == null) { 567 onBufferDraw(); 568 } 569 canvas.drawBitmap(mBuffer, 0, 0, null); 570 } 571 572 private void onBufferDraw() { 573 if (mBuffer == null) { 574 mBuffer = Bitmap.createBitmap(getWidth(), getHeight(), Bitmap.Config.ARGB_8888); 575 mCanvas = new Canvas(mBuffer); 576 invalidateAllKeys(); 577 } 578 final Canvas canvas = mCanvas; 579 canvas.clipRect(mDirtyRect, Op.REPLACE); 580 581 if (mKeyboard == null) return; 582 583 final Paint paint = mPaint; 584 final Drawable keyBackground = mKeyBackground; 585 final Rect clipRegion = mClipRegion; 586 final Rect padding = mPadding; 587 final int kbdPaddingLeft = mPaddingLeft; 588 final int kbdPaddingTop = mPaddingTop; 589 final Key[] keys = mKeys; 590 final Key invalidKey = mInvalidatedKey; 591 592 paint.setAlpha(255); 593 paint.setColor(mKeyTextColor); 594 boolean drawSingleKey = false; 595 if (invalidKey != null && canvas.getClipBounds(clipRegion)) { 596 // Is clipRegion completely contained within the invalidated key? 597 if (invalidKey.x + kbdPaddingLeft - 1 <= clipRegion.left && 598 invalidKey.y + kbdPaddingTop - 1 <= clipRegion.top && 599 invalidKey.x + invalidKey.width + kbdPaddingLeft + 1 >= clipRegion.right && 600 invalidKey.y + invalidKey.height + kbdPaddingTop + 1 >= clipRegion.bottom) { 601 drawSingleKey = true; 602 } 603 } 604 canvas.drawColor(0x00000000, PorterDuff.Mode.CLEAR); 605 final int keyCount = keys.length; 606 for (int i = 0; i < keyCount; i++) { 607 final Key key = keys[i]; 608 if (drawSingleKey && invalidKey != key) { 609 continue; 610 } 611 int[] drawableState = key.getCurrentDrawableState(); 612 keyBackground.setState(drawableState); 613 614 // Switch the character to uppercase if shift is pressed 615 String label = key.label == null? null : adjustCase(key.label).toString(); 616 617 final Rect bounds = keyBackground.getBounds(); 618 if (key.width != bounds.right || 619 key.height != bounds.bottom) { 620 keyBackground.setBounds(0, 0, key.width, key.height); 621 } 622 canvas.translate(key.x + kbdPaddingLeft, key.y + kbdPaddingTop); 623 keyBackground.draw(canvas); 624 625 if (label != null) { 626 // For characters, use large font. For labels like "Done", use small font. 627 if (label.length() > 1 && key.codes.length < 2) { 628 paint.setTextSize(mLabelTextSize); 629 paint.setTypeface(Typeface.DEFAULT_BOLD); 630 } else { 631 paint.setTextSize(mKeyTextSize); 632 paint.setTypeface(Typeface.DEFAULT); 633 } 634 // Draw a drop shadow for the text 635 paint.setShadowLayer(mShadowRadius, 0, 0, mShadowColor); 636 // Draw the text 637 canvas.drawText(label, 638 (key.width - padding.left - padding.right) / 2 639 + padding.left, 640 (key.height - padding.top - padding.bottom) / 2 641 + (paint.getTextSize() - paint.descent()) / 2 + padding.top, 642 paint); 643 // Turn off drop shadow 644 paint.setShadowLayer(0, 0, 0, 0); 645 } else if (key.icon != null) { 646 final int drawableX = (key.width - padding.left - padding.right 647 - key.icon.getIntrinsicWidth()) / 2 + padding.left; 648 final int drawableY = (key.height - padding.top - padding.bottom 649 - key.icon.getIntrinsicHeight()) / 2 + padding.top; 650 canvas.translate(drawableX, drawableY); 651 key.icon.setBounds(0, 0, 652 key.icon.getIntrinsicWidth(), key.icon.getIntrinsicHeight()); 653 key.icon.draw(canvas); 654 canvas.translate(-drawableX, -drawableY); 655 } 656 canvas.translate(-key.x - kbdPaddingLeft, -key.y - kbdPaddingTop); 657 } 658 mInvalidatedKey = null; 659 // Overlay a dark rectangle to dim the keyboard 660 if (mMiniKeyboardOnScreen) { 661 paint.setColor((int) (mBackgroundDimAmount * 0xFF) << 24); 662 canvas.drawRect(0, 0, getWidth(), getHeight(), paint); 663 } 664 665 if (DEBUG && mShowTouchPoints) { 666 paint.setAlpha(128); 667 paint.setColor(0xFFFF0000); 668 canvas.drawCircle(mStartX, mStartY, 3, paint); 669 canvas.drawLine(mStartX, mStartY, mLastX, mLastY, paint); 670 paint.setColor(0xFF0000FF); 671 canvas.drawCircle(mLastX, mLastY, 3, paint); 672 paint.setColor(0xFF00FF00); 673 canvas.drawCircle((mStartX + mLastX) / 2, (mStartY + mLastY) / 2, 2, paint); 674 } 675 676 mDrawPending = false; 677 mDirtyRect.setEmpty(); 678 } 679 680 private int getKeyIndices(int x, int y, int[] allKeys) { 681 final Key[] keys = mKeys; 682 final boolean shifted = mKeyboard.isShifted(); 683 int primaryIndex = NOT_A_KEY; 684 int closestKey = NOT_A_KEY; 685 int closestKeyDist = mProximityThreshold + 1; 686 java.util.Arrays.fill(mDistances, Integer.MAX_VALUE); 687 int [] nearestKeyIndices = mKeyboard.getNearestKeys(x, y); 688 final int keyCount = nearestKeyIndices.length; 689 for (int i = 0; i < keyCount; i++) { 690 final Key key = keys[nearestKeyIndices[i]]; 691 int dist = 0; 692 boolean isInside = key.isInside(x,y); 693 if (((mProximityCorrectOn 694 && (dist = key.squaredDistanceFrom(x, y)) < mProximityThreshold) 695 || isInside) 696 && key.codes[0] > 32) { 697 // Find insertion point 698 final int nCodes = key.codes.length; 699 if (dist < closestKeyDist) { 700 closestKeyDist = dist; 701 closestKey = nearestKeyIndices[i]; 702 } 703 704 if (allKeys == null) continue; 705 706 for (int j = 0; j < mDistances.length; j++) { 707 if (mDistances[j] > dist) { 708 // Make space for nCodes codes 709 System.arraycopy(mDistances, j, mDistances, j + nCodes, 710 mDistances.length - j - nCodes); 711 System.arraycopy(allKeys, j, allKeys, j + nCodes, 712 allKeys.length - j - nCodes); 713 for (int c = 0; c < nCodes; c++) { 714 allKeys[j + c] = key.codes[c]; 715 mDistances[j + c] = dist; 716 } 717 break; 718 } 719 } 720 } 721 722 if (isInside) { 723 primaryIndex = nearestKeyIndices[i]; 724 } 725 } 726 if (primaryIndex == NOT_A_KEY) { 727 primaryIndex = closestKey; 728 } 729 return primaryIndex; 730 } 731 732 private void detectAndSendKey(int x, int y, long eventTime) { 733 int index = mCurrentKey; 734 if (index != NOT_A_KEY && index < mKeys.length) { 735 final Key key = mKeys[index]; 736 if (key.text != null) { 737 mKeyboardActionListener.onText(key.text); 738 mKeyboardActionListener.onRelease(NOT_A_KEY); 739 } else { 740 int code = key.codes[0]; 741 //TextEntryState.keyPressedAt(key, x, y); 742 int[] codes = new int[MAX_NEARBY_KEYS]; 743 Arrays.fill(codes, NOT_A_KEY); 744 getKeyIndices(x, y, codes); 745 // Multi-tap 746 if (mInMultiTap) { 747 if (mTapCount != -1) { 748 mKeyboardActionListener.onKey(Keyboard.KEYCODE_DELETE, KEY_DELETE); 749 } else { 750 mTapCount = 0; 751 } 752 code = key.codes[mTapCount]; 753 } 754 mKeyboardActionListener.onKey(code, codes); 755 mKeyboardActionListener.onRelease(code); 756 } 757 mLastSentIndex = index; 758 mLastTapTime = eventTime; 759 } 760 } 761 762 /** 763 * Handle multi-tap keys by producing the key label for the current multi-tap state. 764 */ 765 private CharSequence getPreviewText(Key key) { 766 if (mInMultiTap) { 767 // Multi-tap 768 mPreviewLabel.setLength(0); 769 mPreviewLabel.append((char) key.codes[mTapCount < 0 ? 0 : mTapCount]); 770 return adjustCase(mPreviewLabel); 771 } else { 772 return adjustCase(key.label); 773 } 774 } 775 776 private void showPreview(int keyIndex) { 777 int oldKeyIndex = mCurrentKeyIndex; 778 final PopupWindow previewPopup = mPreviewPopup; 779 780 mCurrentKeyIndex = keyIndex; 781 // Release the old key and press the new key 782 final Key[] keys = mKeys; 783 if (oldKeyIndex != mCurrentKeyIndex) { 784 if (oldKeyIndex != NOT_A_KEY && keys.length > oldKeyIndex) { 785 keys[oldKeyIndex].onReleased(mCurrentKeyIndex == NOT_A_KEY); 786 invalidateKey(oldKeyIndex); 787 } 788 if (mCurrentKeyIndex != NOT_A_KEY && keys.length > mCurrentKeyIndex) { 789 keys[mCurrentKeyIndex].onPressed(); 790 invalidateKey(mCurrentKeyIndex); 791 } 792 } 793 // If key changed and preview is on ... 794 if (oldKeyIndex != mCurrentKeyIndex && mShowPreview) { 795 mHandler.removeMessages(MSG_SHOW_PREVIEW); 796 if (previewPopup.isShowing()) { 797 if (keyIndex == NOT_A_KEY) { 798 mHandler.sendMessageDelayed(mHandler 799 .obtainMessage(MSG_REMOVE_PREVIEW), 800 DELAY_AFTER_PREVIEW); 801 } 802 } 803 if (keyIndex != NOT_A_KEY) { 804 if (previewPopup.isShowing() && mPreviewText.getVisibility() == VISIBLE) { 805 // Show right away, if it's already visible and finger is moving around 806 showKey(keyIndex); 807 } else { 808 mHandler.sendMessageDelayed( 809 mHandler.obtainMessage(MSG_SHOW_PREVIEW, keyIndex, 0), 810 DELAY_BEFORE_PREVIEW); 811 } 812 } 813 } 814 } 815 816 private void showKey(final int keyIndex) { 817 final PopupWindow previewPopup = mPreviewPopup; 818 final Key[] keys = mKeys; 819 Key key = keys[keyIndex]; 820 if (key.icon != null) { 821 mPreviewText.setCompoundDrawables(null, null, null, 822 key.iconPreview != null ? key.iconPreview : key.icon); 823 mPreviewText.setText(null); 824 } else { 825 mPreviewText.setCompoundDrawables(null, null, null, null); 826 mPreviewText.setText(getPreviewText(key)); 827 if (key.label.length() > 1 && key.codes.length < 2) { 828 mPreviewText.setTextSize(mKeyTextSize); 829 mPreviewText.setTypeface(Typeface.DEFAULT_BOLD); 830 } else { 831 mPreviewText.setTextSize(mPreviewTextSizeLarge); 832 mPreviewText.setTypeface(Typeface.DEFAULT); 833 } 834 } 835 mPreviewText.measure(MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED), 836 MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED)); 837 int popupWidth = Math.max(mPreviewText.getMeasuredWidth(), key.width 838 + mPreviewText.getPaddingLeft() + mPreviewText.getPaddingRight()); 839 final int popupHeight = mPreviewHeight; 840 LayoutParams lp = mPreviewText.getLayoutParams(); 841 if (lp != null) { 842 lp.width = popupWidth; 843 lp.height = popupHeight; 844 } 845 if (!mPreviewCentered) { 846 mPopupPreviewX = key.x - mPreviewText.getPaddingLeft() + mPaddingLeft; 847 mPopupPreviewY = key.y - popupHeight + mPreviewOffset; 848 } else { 849 // TODO: Fix this if centering is brought back 850 mPopupPreviewX = 160 - mPreviewText.getMeasuredWidth() / 2; 851 mPopupPreviewY = - mPreviewText.getMeasuredHeight(); 852 } 853 mHandler.removeMessages(MSG_REMOVE_PREVIEW); 854 if (mOffsetInWindow == null) { 855 mOffsetInWindow = new int[2]; 856 getLocationInWindow(mOffsetInWindow); 857 mOffsetInWindow[0] += mMiniKeyboardOffsetX; // Offset may be zero 858 mOffsetInWindow[1] += mMiniKeyboardOffsetY; // Offset may be zero 859 } 860 // Set the preview background state 861 mPreviewText.getBackground().setState( 862 key.popupResId != 0 ? LONG_PRESSABLE_STATE_SET : EMPTY_STATE_SET); 863 if (previewPopup.isShowing()) { 864 previewPopup.update(mPopupPreviewX + mOffsetInWindow[0], 865 mPopupPreviewY + mOffsetInWindow[1], 866 popupWidth, popupHeight); 867 } else { 868 previewPopup.setWidth(popupWidth); 869 previewPopup.setHeight(popupHeight); 870 previewPopup.showAtLocation(mPopupParent, Gravity.NO_GRAVITY, 871 mPopupPreviewX + mOffsetInWindow[0], 872 mPopupPreviewY + mOffsetInWindow[1]); 873 } 874 mPreviewText.setVisibility(VISIBLE); 875 } 876 877 /** 878 * Requests a redraw of the entire keyboard. Calling {@link #invalidate} is not sufficient 879 * because the keyboard renders the keys to an off-screen buffer and an invalidate() only 880 * draws the cached buffer. 881 * @see #invalidateKey(int) 882 */ 883 public void invalidateAllKeys() { 884 mDirtyRect.union(0, 0, getWidth(), getHeight()); 885 mDrawPending = true; 886 invalidate(); 887 } 888 889 /** 890 * Invalidates a key so that it will be redrawn on the next repaint. Use this method if only 891 * one key is changing it's content. Any changes that affect the position or size of the key 892 * may not be honored. 893 * @param keyIndex the index of the key in the attached {@link Keyboard}. 894 * @see #invalidateAllKeys 895 */ 896 public void invalidateKey(int keyIndex) { 897 if (mKeys == null) return; 898 if (keyIndex < 0 || keyIndex >= mKeys.length) { 899 return; 900 } 901 final Key key = mKeys[keyIndex]; 902 mInvalidatedKey = key; 903 mDirtyRect.union(key.x + mPaddingLeft, key.y + mPaddingTop, 904 key.x + key.width + mPaddingLeft, key.y + key.height + mPaddingTop); 905 onBufferDraw(); 906 invalidate(key.x + mPaddingLeft, key.y + mPaddingTop, 907 key.x + key.width + mPaddingLeft, key.y + key.height + mPaddingTop); 908 } 909 910 private boolean openPopupIfRequired(MotionEvent me) { 911 // Check if we have a popup layout specified first. 912 if (mPopupLayout == 0) { 913 return false; 914 } 915 if (mCurrentKey < 0 || mCurrentKey >= mKeys.length) { 916 return false; 917 } 918 919 Key popupKey = mKeys[mCurrentKey]; 920 boolean result = onLongPress(popupKey); 921 if (result) { 922 mAbortKey = true; 923 showPreview(NOT_A_KEY); 924 } 925 return result; 926 } 927 928 /** 929 * Called when a key is long pressed. By default this will open any popup keyboard associated 930 * with this key through the attributes popupLayout and popupCharacters. 931 * @param popupKey the key that was long pressed 932 * @return true if the long press is handled, false otherwise. Subclasses should call the 933 * method on the base class if the subclass doesn't wish to handle the call. 934 */ 935 protected boolean onLongPress(Key popupKey) { 936 int popupKeyboardId = popupKey.popupResId; 937 938 if (popupKeyboardId != 0) { 939 mMiniKeyboardContainer = mMiniKeyboardCache.get(popupKey); 940 if (mMiniKeyboardContainer == null) { 941 LayoutInflater inflater = (LayoutInflater) getContext().getSystemService( 942 Context.LAYOUT_INFLATER_SERVICE); 943 mMiniKeyboardContainer = inflater.inflate(mPopupLayout, null); 944 mMiniKeyboard = (KeyboardView) mMiniKeyboardContainer.findViewById( 945 com.android.internal.R.id.keyboardView); 946 View closeButton = mMiniKeyboardContainer.findViewById( 947 com.android.internal.R.id.closeButton); 948 if (closeButton != null) closeButton.setOnClickListener(this); 949 mMiniKeyboard.setOnKeyboardActionListener(new OnKeyboardActionListener() { 950 public void onKey(int primaryCode, int[] keyCodes) { 951 mKeyboardActionListener.onKey(primaryCode, keyCodes); 952 dismissPopupKeyboard(); 953 } 954 955 public void onText(CharSequence text) { 956 mKeyboardActionListener.onText(text); 957 dismissPopupKeyboard(); 958 } 959 960 public void swipeLeft() { } 961 public void swipeRight() { } 962 public void swipeUp() { } 963 public void swipeDown() { } 964 public void onPress(int primaryCode) { 965 mKeyboardActionListener.onPress(primaryCode); 966 } 967 public void onRelease(int primaryCode) { 968 mKeyboardActionListener.onRelease(primaryCode); 969 } 970 }); 971 //mInputView.setSuggest(mSuggest); 972 Keyboard keyboard; 973 if (popupKey.popupCharacters != null) { 974 keyboard = new Keyboard(getContext(), popupKeyboardId, 975 popupKey.popupCharacters, -1, getPaddingLeft() + getPaddingRight()); 976 } else { 977 keyboard = new Keyboard(getContext(), popupKeyboardId); 978 } 979 mMiniKeyboard.setKeyboard(keyboard); 980 mMiniKeyboard.setPopupParent(this); 981 mMiniKeyboardContainer.measure( 982 MeasureSpec.makeMeasureSpec(getWidth(), MeasureSpec.AT_MOST), 983 MeasureSpec.makeMeasureSpec(getHeight(), MeasureSpec.AT_MOST)); 984 985 mMiniKeyboardCache.put(popupKey, mMiniKeyboardContainer); 986 } else { 987 mMiniKeyboard = (KeyboardView) mMiniKeyboardContainer.findViewById( 988 com.android.internal.R.id.keyboardView); 989 } 990 if (mWindowOffset == null) { 991 mWindowOffset = new int[2]; 992 getLocationInWindow(mWindowOffset); 993 } 994 mPopupX = popupKey.x + mPaddingLeft; 995 mPopupY = popupKey.y + mPaddingTop; 996 mPopupX = mPopupX + popupKey.width - mMiniKeyboardContainer.getMeasuredWidth(); 997 mPopupY = mPopupY - mMiniKeyboardContainer.getMeasuredHeight(); 998 final int x = mPopupX + mMiniKeyboardContainer.getPaddingRight() + mWindowOffset[0]; 999 final int y = mPopupY + mMiniKeyboardContainer.getPaddingBottom() + mWindowOffset[1]; 1000 mMiniKeyboard.setPopupOffset(x < 0 ? 0 : x, y); 1001 mMiniKeyboard.setShifted(isShifted()); 1002 mPopupKeyboard.setContentView(mMiniKeyboardContainer); 1003 mPopupKeyboard.setWidth(mMiniKeyboardContainer.getMeasuredWidth()); 1004 mPopupKeyboard.setHeight(mMiniKeyboardContainer.getMeasuredHeight()); 1005 mPopupKeyboard.showAtLocation(this, Gravity.NO_GRAVITY, x, y); 1006 mMiniKeyboardOnScreen = true; 1007 //mMiniKeyboard.onTouchEvent(getTranslatedEvent(me)); 1008 invalidateAllKeys(); 1009 return true; 1010 } 1011 return false; 1012 } 1013 1014 @Override 1015 public boolean onTouchEvent(MotionEvent me) { 1016 int touchX = (int) me.getX() - mPaddingLeft; 1017 int touchY = (int) me.getY() + mVerticalCorrection - mPaddingTop; 1018 int action = me.getAction(); 1019 long eventTime = me.getEventTime(); 1020 int keyIndex = getKeyIndices(touchX, touchY, null); 1021 1022 if (mGestureDetector.onTouchEvent(me)) { 1023 showPreview(NOT_A_KEY); 1024 mHandler.removeMessages(MSG_REPEAT); 1025 mHandler.removeMessages(MSG_LONGPRESS); 1026 return true; 1027 } 1028 1029 // Needs to be called after the gesture detector gets a turn, as it may have 1030 // displayed the mini keyboard 1031 if (mMiniKeyboardOnScreen) { 1032 return true; 1033 } 1034 1035 switch (action) { 1036 case MotionEvent.ACTION_DOWN: 1037 mAbortKey = false; 1038 mStartX = touchX; 1039 mStartY = touchY; 1040 mLastCodeX = touchX; 1041 mLastCodeY = touchY; 1042 mLastKeyTime = 0; 1043 mCurrentKeyTime = 0; 1044 mLastKey = NOT_A_KEY; 1045 mCurrentKey = keyIndex; 1046 mDownTime = me.getEventTime(); 1047 mLastMoveTime = mDownTime; 1048 checkMultiTap(eventTime, keyIndex); 1049 mKeyboardActionListener.onPress(keyIndex != NOT_A_KEY ? 1050 mKeys[keyIndex].codes[0] : 0); 1051 if (mCurrentKey >= 0 && mKeys[mCurrentKey].repeatable) { 1052 mRepeatKeyIndex = mCurrentKey; 1053 repeatKey(); 1054 Message msg = mHandler.obtainMessage(MSG_REPEAT); 1055 mHandler.sendMessageDelayed(msg, REPEAT_START_DELAY); 1056 } 1057 if (mCurrentKey != NOT_A_KEY) { 1058 Message msg = mHandler.obtainMessage(MSG_LONGPRESS, me); 1059 mHandler.sendMessageDelayed(msg, LONGPRESS_TIMEOUT); 1060 } 1061 showPreview(keyIndex); 1062 break; 1063 1064 case MotionEvent.ACTION_MOVE: 1065 boolean continueLongPress = false; 1066 if (keyIndex != NOT_A_KEY) { 1067 if (mCurrentKey == NOT_A_KEY) { 1068 mCurrentKey = keyIndex; 1069 mCurrentKeyTime = eventTime - mDownTime; 1070 } else { 1071 if (keyIndex == mCurrentKey) { 1072 mCurrentKeyTime += eventTime - mLastMoveTime; 1073 continueLongPress = true; 1074 } else { 1075 resetMultiTap(); 1076 mLastKey = mCurrentKey; 1077 mLastCodeX = mLastX; 1078 mLastCodeY = mLastY; 1079 mLastKeyTime = 1080 mCurrentKeyTime + eventTime - mLastMoveTime; 1081 mCurrentKey = keyIndex; 1082 mCurrentKeyTime = 0; 1083 } 1084 } 1085 if (keyIndex != mRepeatKeyIndex) { 1086 mHandler.removeMessages(MSG_REPEAT); 1087 mRepeatKeyIndex = NOT_A_KEY; 1088 } 1089 } 1090 if (!continueLongPress) { 1091 // Cancel old longpress 1092 mHandler.removeMessages(MSG_LONGPRESS); 1093 // Start new longpress if key has changed 1094 if (keyIndex != NOT_A_KEY) { 1095 Message msg = mHandler.obtainMessage(MSG_LONGPRESS, me); 1096 mHandler.sendMessageDelayed(msg, LONGPRESS_TIMEOUT); 1097 } 1098 } 1099 showPreview(keyIndex); 1100 break; 1101 1102 case MotionEvent.ACTION_UP: 1103 mHandler.removeMessages(MSG_SHOW_PREVIEW); 1104 mHandler.removeMessages(MSG_REPEAT); 1105 mHandler.removeMessages(MSG_LONGPRESS); 1106 if (keyIndex == mCurrentKey) { 1107 mCurrentKeyTime += eventTime - mLastMoveTime; 1108 } else { 1109 resetMultiTap(); 1110 mLastKey = mCurrentKey; 1111 mLastKeyTime = mCurrentKeyTime + eventTime - mLastMoveTime; 1112 mCurrentKey = keyIndex; 1113 mCurrentKeyTime = 0; 1114 } 1115 if (mCurrentKeyTime < mLastKeyTime && mLastKey != NOT_A_KEY) { 1116 mCurrentKey = mLastKey; 1117 touchX = mLastCodeX; 1118 touchY = mLastCodeY; 1119 } 1120 showPreview(NOT_A_KEY); 1121 Arrays.fill(mKeyIndices, NOT_A_KEY); 1122 // If we're not on a repeating key (which sends on a DOWN event) 1123 if (mRepeatKeyIndex == NOT_A_KEY && !mMiniKeyboardOnScreen && !mAbortKey) { 1124 detectAndSendKey(touchX, touchY, eventTime); 1125 } 1126 invalidateKey(keyIndex); 1127 mRepeatKeyIndex = NOT_A_KEY; 1128 break; 1129 } 1130 mLastX = touchX; 1131 mLastY = touchY; 1132 return true; 1133 } 1134 1135 private boolean repeatKey() { 1136 Key key = mKeys[mRepeatKeyIndex]; 1137 detectAndSendKey(key.x, key.y, mLastTapTime); 1138 return true; 1139 } 1140 1141 protected void swipeRight() { 1142 mKeyboardActionListener.swipeRight(); 1143 } 1144 1145 protected void swipeLeft() { 1146 mKeyboardActionListener.swipeLeft(); 1147 } 1148 1149 protected void swipeUp() { 1150 mKeyboardActionListener.swipeUp(); 1151 } 1152 1153 protected void swipeDown() { 1154 mKeyboardActionListener.swipeDown(); 1155 } 1156 1157 public void closing() { 1158 if (mPreviewPopup.isShowing()) { 1159 mPreviewPopup.dismiss(); 1160 } 1161 mHandler.removeMessages(MSG_REPEAT); 1162 mHandler.removeMessages(MSG_LONGPRESS); 1163 mHandler.removeMessages(MSG_SHOW_PREVIEW); 1164 1165 dismissPopupKeyboard(); 1166 mBuffer = null; 1167 mCanvas = null; 1168 mMiniKeyboardCache.clear(); 1169 } 1170 1171 @Override 1172 public void onDetachedFromWindow() { 1173 super.onDetachedFromWindow(); 1174 closing(); 1175 } 1176 1177 private void dismissPopupKeyboard() { 1178 if (mPopupKeyboard.isShowing()) { 1179 mPopupKeyboard.dismiss(); 1180 mMiniKeyboardOnScreen = false; 1181 invalidateAllKeys(); 1182 } 1183 } 1184 1185 public boolean handleBack() { 1186 if (mPopupKeyboard.isShowing()) { 1187 dismissPopupKeyboard(); 1188 return true; 1189 } 1190 return false; 1191 } 1192 1193 private void resetMultiTap() { 1194 mLastSentIndex = NOT_A_KEY; 1195 mTapCount = 0; 1196 mLastTapTime = -1; 1197 mInMultiTap = false; 1198 } 1199 1200 private void checkMultiTap(long eventTime, int keyIndex) { 1201 if (keyIndex == NOT_A_KEY) return; 1202 Key key = mKeys[keyIndex]; 1203 if (key.codes.length > 1) { 1204 mInMultiTap = true; 1205 if (eventTime < mLastTapTime + MULTITAP_INTERVAL 1206 && keyIndex == mLastSentIndex) { 1207 mTapCount = (mTapCount + 1) % key.codes.length; 1208 return; 1209 } else { 1210 mTapCount = -1; 1211 return; 1212 } 1213 } 1214 if (eventTime > mLastTapTime + MULTITAP_INTERVAL || keyIndex != mLastSentIndex) { 1215 resetMultiTap(); 1216 } 1217 } 1218} 1219