1 /* 2 * Copyright (C) 2007 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.internal.widget; 18 19 20 import com.android.internal.R; 21 22 import android.content.Context; 23 import android.content.res.Resources; 24 import android.content.res.TypedArray; 25 import android.graphics.Bitmap; 26 import android.graphics.BitmapFactory; 27 import android.graphics.Canvas; 28 import android.graphics.Color; 29 import android.graphics.Matrix; 30 import android.graphics.Paint; 31 import android.graphics.Path; 32 import android.graphics.Rect; 33 import android.os.Debug; 34 import android.os.Parcel; 35 import android.os.Parcelable; 36 import android.os.SystemClock; 37 import android.os.Vibrator; 38 import android.util.AttributeSet; 39 import android.util.Log; 40 import android.view.MotionEvent; 41 import android.view.View; 42 43 import java.util.ArrayList; 44 import java.util.List; 45 46 /** 47 * Displays and detects the user's unlock attempt, which is a drag of a finger 48 * across 9 regions of the screen. 49 * 50 * Is also capable of displaying a static pattern in "in progress", "wrong" or 51 * "correct" states. 52 */ 53 public class LockPatternView extends View { 54 // Aspect to use when rendering this view 55 private static final int ASPECT_SQUARE = 0; // View will be the minimum of width/height 56 private static final int ASPECT_LOCK_WIDTH = 1; // Fixed width; height will be minimum of (w,h) 57 private static final int ASPECT_LOCK_HEIGHT = 2; // Fixed height; width will be minimum of (w,h) 58 59 // Vibrator pattern for creating a tactile bump 60 private static final long[] DEFAULT_VIBE_PATTERN = {0, 1, 40, 41}; 61 62 private static final boolean PROFILE_DRAWING = false; 63 private boolean mDrawingProfilingStarted = false; 64 65 private Paint mPaint = new Paint(); 66 private Paint mPathPaint = new Paint(); 67 68 // TODO: make this common with PhoneWindow 69 static final int STATUS_BAR_HEIGHT = 25; 70 71 /** 72 * How many milliseconds we spend animating each circle of a lock pattern 73 * if the animating mode is set. The entire animation should take this 74 * constant * the length of the pattern to complete. 75 */ 76 private static final int MILLIS_PER_CIRCLE_ANIMATING = 700; 77 78 private OnPatternListener mOnPatternListener; 79 private ArrayList<Cell> mPattern = new ArrayList<Cell>(9); 80 81 /** 82 * Lookup table for the circles of the pattern we are currently drawing. 83 * This will be the cells of the complete pattern unless we are animating, 84 * in which case we use this to hold the cells we are drawing for the in 85 * progress animation. 86 */ 87 private boolean[][] mPatternDrawLookup = new boolean[3][3]; 88 89 /** 90 * the in progress point: 91 * - during interaction: where the user's finger is 92 * - during animation: the current tip of the animating line 93 */ 94 private float mInProgressX = -1; 95 private float mInProgressY = -1; 96 97 private long mAnimatingPeriodStart; 98 99 private DisplayMode mPatternDisplayMode = DisplayMode.Correct; 100 private boolean mInputEnabled = true; 101 private boolean mInStealthMode = false; 102 private boolean mTactileFeedbackEnabled = true; 103 private boolean mPatternInProgress = false; 104 105 private float mDiameterFactor = 0.5f; 106 private float mHitFactor = 0.6f; 107 108 private float mSquareWidth; 109 private float mSquareHeight; 110 111 private Bitmap mBitmapBtnDefault; 112 private Bitmap mBitmapBtnTouched; 113 private Bitmap mBitmapCircleDefault; 114 private Bitmap mBitmapCircleGreen; 115 private Bitmap mBitmapCircleRed; 116 117 private Bitmap mBitmapArrowGreenUp; 118 private Bitmap mBitmapArrowRedUp; 119 120 private final Path mCurrentPath = new Path(); 121 private final Rect mInvalidate = new Rect(); 122 123 private int mBitmapWidth; 124 private int mBitmapHeight; 125 126 127 private Vibrator vibe; // Vibrator for creating tactile feedback 128 129 private long[] mVibePattern; 130 131 private int mAspect; 132 133 /** 134 * Represents a cell in the 3 X 3 matrix of the unlock pattern view. 135 */ 136 public static class Cell { 137 int row; 138 int column; 139 140 // keep # objects limited to 9 141 static Cell[][] sCells = new Cell[3][3]; 142 static { 143 for (int i = 0; i < 3; i++) { 144 for (int j = 0; j < 3; j++) { 145 sCells[i][j] = new Cell(i, j); 146 } 147 } 148 } 149 150 /** 151 * @param row The row of the cell. 152 * @param column The column of the cell. 153 */ 154 private Cell(int row, int column) { 155 checkRange(row, column); 156 this.row = row; 157 this.column = column; 158 } 159 160 public int getRow() { 161 return row; 162 } 163 164 public int getColumn() { 165 return column; 166 } 167 168 /** 169 * @param row The row of the cell. 170 * @param column The column of the cell. 171 */ 172 public static synchronized Cell of(int row, int column) { 173 checkRange(row, column); 174 return sCells[row][column]; 175 } 176 177 private static void checkRange(int row, int column) { 178 if (row < 0 || row > 2) { 179 throw new IllegalArgumentException("row must be in range 0-2"); 180 } 181 if (column < 0 || column > 2) { 182 throw new IllegalArgumentException("column must be in range 0-2"); 183 } 184 } 185 186 public String toString() { 187 return "(row=" + row + ",clmn=" + column + ")"; 188 } 189 } 190 191 /** 192 * How to display the current pattern. 193 */ 194 public enum DisplayMode { 195 196 /** 197 * The pattern drawn is correct (i.e draw it in a friendly color) 198 */ 199 Correct, 200 201 /** 202 * Animate the pattern (for demo, and help). 203 */ 204 Animate, 205 206 /** 207 * The pattern is wrong (i.e draw a foreboding color) 208 */ 209 Wrong 210 } 211 212 /** 213 * The call back interface for detecting patterns entered by the user. 214 */ 215 public static interface OnPatternListener { 216 217 /** 218 * A new pattern has begun. 219 */ 220 void onPatternStart(); 221 222 /** 223 * The pattern was cleared. 224 */ 225 void onPatternCleared(); 226 227 /** 228 * The user extended the pattern currently being drawn by one cell. 229 * @param pattern The pattern with newly added cell. 230 */ 231 void onPatternCellAdded(List<Cell> pattern); 232 233 /** 234 * A pattern was detected from the user. 235 * @param pattern The pattern. 236 */ 237 void onPatternDetected(List<Cell> pattern); 238 } 239 240 public LockPatternView(Context context) { 241 this(context, null); 242 } 243 244 public LockPatternView(Context context, AttributeSet attrs) { 245 super(context, attrs); 246 vibe = new Vibrator(); 247 248 TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.LockPatternView); 249 250 final String aspect = a.getString(R.styleable.LockPatternView_aspect); 251 252 if ("square".equals(aspect)) { 253 mAspect = ASPECT_SQUARE; 254 } else if ("lock_width".equals(aspect)) { 255 mAspect = ASPECT_LOCK_WIDTH; 256 } else if ("lock_height".equals(aspect)) { 257 mAspect = ASPECT_LOCK_HEIGHT; 258 } else { 259 mAspect = ASPECT_SQUARE; 260 } 261 262 setClickable(true); 263 264 mPathPaint.setAntiAlias(true); 265 mPathPaint.setDither(true); 266 mPathPaint.setColor(Color.WHITE); // TODO this should be from the style 267 mPathPaint.setAlpha(128); 268 mPathPaint.setStyle(Paint.Style.STROKE); 269 mPathPaint.setStrokeJoin(Paint.Join.ROUND); 270 mPathPaint.setStrokeCap(Paint.Cap.ROUND); 271 272 // lot's of bitmaps! 273 mBitmapBtnDefault = getBitmapFor(R.drawable.btn_code_lock_default); 274 mBitmapBtnTouched = getBitmapFor(R.drawable.btn_code_lock_touched); 275 mBitmapCircleDefault = getBitmapFor(R.drawable.indicator_code_lock_point_area_default); 276 mBitmapCircleGreen = getBitmapFor(R.drawable.indicator_code_lock_point_area_green); 277 mBitmapCircleRed = getBitmapFor(R.drawable.indicator_code_lock_point_area_red); 278 279 mBitmapArrowGreenUp = getBitmapFor(R.drawable.indicator_code_lock_drag_direction_green_up); 280 mBitmapArrowRedUp = getBitmapFor(R.drawable.indicator_code_lock_drag_direction_red_up); 281 282 // we assume all bitmaps have the same size 283 mBitmapWidth = mBitmapBtnDefault.getWidth(); 284 mBitmapHeight = mBitmapBtnDefault.getHeight(); 285 286 // allow vibration pattern to be customized 287 mVibePattern = loadVibratePattern(com.android.internal.R.array.config_virtualKeyVibePattern); 288 } 289 290 private long[] loadVibratePattern(int id) { 291 int[] pattern = null; 292 try { 293 pattern = getResources().getIntArray(id); 294 } catch (Resources.NotFoundException e) { 295 Log.e("LockPatternView", "Vibrate pattern missing, using default", e); 296 } 297 if (pattern == null) { 298 return DEFAULT_VIBE_PATTERN; 299 } 300 301 long[] tmpPattern = new long[pattern.length]; 302 for (int i = 0; i < pattern.length; i++) { 303 tmpPattern[i] = pattern[i]; 304 } 305 return tmpPattern; 306 } 307 308 private Bitmap getBitmapFor(int resId) { 309 return BitmapFactory.decodeResource(getContext().getResources(), resId); 310 } 311 312 /** 313 * @return Whether the view is in stealth mode. 314 */ 315 public boolean isInStealthMode() { 316 return mInStealthMode; 317 } 318 319 /** 320 * @return Whether the view has tactile feedback enabled. 321 */ 322 public boolean isTactileFeedbackEnabled() { 323 return mTactileFeedbackEnabled; 324 } 325 326 /** 327 * Set whether the view is in stealth mode. If true, there will be no 328 * visible feedback as the user enters the pattern. 329 * 330 * @param inStealthMode Whether in stealth mode. 331 */ 332 public void setInStealthMode(boolean inStealthMode) { 333 mInStealthMode = inStealthMode; 334 } 335 336 /** 337 * Set whether the view will use tactile feedback. If true, there will be 338 * tactile feedback as the user enters the pattern. 339 * 340 * @param tactileFeedbackEnabled Whether tactile feedback is enabled 341 */ 342 public void setTactileFeedbackEnabled(boolean tactileFeedbackEnabled) { 343 mTactileFeedbackEnabled = tactileFeedbackEnabled; 344 } 345 346 /** 347 * Set the call back for pattern detection. 348 * @param onPatternListener The call back. 349 */ 350 public void setOnPatternListener( 351 OnPatternListener onPatternListener) { 352 mOnPatternListener = onPatternListener; 353 } 354 355 /** 356 * Set the pattern explicitely (rather than waiting for the user to input 357 * a pattern). 358 * @param displayMode How to display the pattern. 359 * @param pattern The pattern. 360 */ 361 public void setPattern(DisplayMode displayMode, List<Cell> pattern) { 362 mPattern.clear(); 363 mPattern.addAll(pattern); 364 clearPatternDrawLookup(); 365 for (Cell cell : pattern) { 366 mPatternDrawLookup[cell.getRow()][cell.getColumn()] = true; 367 } 368 369 setDisplayMode(displayMode); 370 } 371 372 /** 373 * Set the display mode of the current pattern. This can be useful, for 374 * instance, after detecting a pattern to tell this view whether change the 375 * in progress result to correct or wrong. 376 * @param displayMode The display mode. 377 */ 378 public void setDisplayMode(DisplayMode displayMode) { 379 mPatternDisplayMode = displayMode; 380 if (displayMode == DisplayMode.Animate) { 381 if (mPattern.size() == 0) { 382 throw new IllegalStateException("you must have a pattern to " 383 + "animate if you want to set the display mode to animate"); 384 } 385 mAnimatingPeriodStart = SystemClock.elapsedRealtime(); 386 final Cell first = mPattern.get(0); 387 mInProgressX = getCenterXForColumn(first.getColumn()); 388 mInProgressY = getCenterYForRow(first.getRow()); 389 clearPatternDrawLookup(); 390 } 391 invalidate(); 392 } 393 394 /** 395 * Clear the pattern. 396 */ 397 public void clearPattern() { 398 resetPattern(); 399 } 400 401 /** 402 * Reset all pattern state. 403 */ 404 private void resetPattern() { 405 mPattern.clear(); 406 clearPatternDrawLookup(); 407 mPatternDisplayMode = DisplayMode.Correct; 408 invalidate(); 409 } 410 411 /** 412 * Clear the pattern lookup table. 413 */ 414 private void clearPatternDrawLookup() { 415 for (int i = 0; i < 3; i++) { 416 for (int j = 0; j < 3; j++) { 417 mPatternDrawLookup[i][j] = false; 418 } 419 } 420 } 421 422 /** 423 * Disable input (for instance when displaying a message that will 424 * timeout so user doesn't get view into messy state). 425 */ 426 public void disableInput() { 427 mInputEnabled = false; 428 } 429 430 /** 431 * Enable input. 432 */ 433 public void enableInput() { 434 mInputEnabled = true; 435 } 436 437 @Override 438 protected void onSizeChanged(int w, int h, int oldw, int oldh) { 439 final int width = w - mPaddingLeft - mPaddingRight; 440 mSquareWidth = width / 3.0f; 441 442 final int height = h - mPaddingTop - mPaddingBottom; 443 mSquareHeight = height / 3.0f; 444 } 445 446 @Override 447 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 448 final int width = MeasureSpec.getSize(widthMeasureSpec); 449 final int height = MeasureSpec.getSize(heightMeasureSpec); 450 int viewWidth = width; 451 int viewHeight = height; 452 switch (mAspect) { 453 case ASPECT_SQUARE: 454 viewWidth = viewHeight = Math.min(width, height); 455 break; 456 case ASPECT_LOCK_WIDTH: 457 viewWidth = width; 458 viewHeight = Math.min(width, height); 459 break; 460 case ASPECT_LOCK_HEIGHT: 461 viewWidth = Math.min(width, height); 462 viewHeight = height; 463 break; 464 } 465 setMeasuredDimension(viewWidth, viewHeight); 466 } 467 468 /** 469 * Determines whether the point x, y will add a new point to the current 470 * pattern (in addition to finding the cell, also makes heuristic choices 471 * such as filling in gaps based on current pattern). 472 * @param x The x coordinate. 473 * @param y The y coordinate. 474 */ 475 private Cell detectAndAddHit(float x, float y) { 476 final Cell cell = checkForNewHit(x, y); 477 if (cell != null) { 478 479 // check for gaps in existing pattern 480 Cell fillInGapCell = null; 481 final ArrayList<Cell> pattern = mPattern; 482 if (!pattern.isEmpty()) { 483 final Cell lastCell = pattern.get(pattern.size() - 1); 484 int dRow = cell.row - lastCell.row; 485 int dColumn = cell.column - lastCell.column; 486 487 int fillInRow = lastCell.row; 488 int fillInColumn = lastCell.column; 489 490 if (Math.abs(dRow) == 2 && Math.abs(dColumn) != 1) { 491 fillInRow = lastCell.row + ((dRow > 0) ? 1 : -1); 492 } 493 494 if (Math.abs(dColumn) == 2 && Math.abs(dRow) != 1) { 495 fillInColumn = lastCell.column + ((dColumn > 0) ? 1 : -1); 496 } 497 498 fillInGapCell = Cell.of(fillInRow, fillInColumn); 499 } 500 501 if (fillInGapCell != null && 502 !mPatternDrawLookup[fillInGapCell.row][fillInGapCell.column]) { 503 addCellToPattern(fillInGapCell); 504 } 505 addCellToPattern(cell); 506 if (mTactileFeedbackEnabled){ 507 vibe.vibrate(mVibePattern, -1); // Generate tactile feedback 508 } 509 return cell; 510 } 511 return null; 512 } 513 514 private void addCellToPattern(Cell newCell) { 515 mPatternDrawLookup[newCell.getRow()][newCell.getColumn()] = true; 516 mPattern.add(newCell); 517 if (mOnPatternListener != null) { 518 mOnPatternListener.onPatternCellAdded(mPattern); 519 } 520 } 521 522 // helper method to find which cell a point maps to 523 private Cell checkForNewHit(float x, float y) { 524 525 final int rowHit = getRowHit(y); 526 if (rowHit < 0) { 527 return null; 528 } 529 final int columnHit = getColumnHit(x); 530 if (columnHit < 0) { 531 return null; 532 } 533 534 if (mPatternDrawLookup[rowHit][columnHit]) { 535 return null; 536 } 537 return Cell.of(rowHit, columnHit); 538 } 539 540 /** 541 * Helper method to find the row that y falls into. 542 * @param y The y coordinate 543 * @return The row that y falls in, or -1 if it falls in no row. 544 */ 545 private int getRowHit(float y) { 546 547 final float squareHeight = mSquareHeight; 548 float hitSize = squareHeight * mHitFactor; 549 550 float offset = mPaddingTop + (squareHeight - hitSize) / 2f; 551 for (int i = 0; i < 3; i++) { 552 553 final float hitTop = offset + squareHeight * i; 554 if (y >= hitTop && y <= hitTop + hitSize) { 555 return i; 556 } 557 } 558 return -1; 559 } 560 561 /** 562 * Helper method to find the column x fallis into. 563 * @param x The x coordinate. 564 * @return The column that x falls in, or -1 if it falls in no column. 565 */ 566 private int getColumnHit(float x) { 567 final float squareWidth = mSquareWidth; 568 float hitSize = squareWidth * mHitFactor; 569 570 float offset = mPaddingLeft + (squareWidth - hitSize) / 2f; 571 for (int i = 0; i < 3; i++) { 572 573 final float hitLeft = offset + squareWidth * i; 574 if (x >= hitLeft && x <= hitLeft + hitSize) { 575 return i; 576 } 577 } 578 return -1; 579 } 580 581 @Override 582 public boolean onTouchEvent(MotionEvent motionEvent) { 583 if (!mInputEnabled || !isEnabled()) { 584 return false; 585 } 586 587 final float x = motionEvent.getX(); 588 final float y = motionEvent.getY(); 589 Cell hitCell; 590 switch(motionEvent.getAction()) { 591 case MotionEvent.ACTION_DOWN: 592 resetPattern(); 593 hitCell = detectAndAddHit(x, y); 594 if (hitCell != null && mOnPatternListener != null) { 595 mPatternInProgress = true; 596 mPatternDisplayMode = DisplayMode.Correct; 597 mOnPatternListener.onPatternStart(); 598 } else if (mOnPatternListener != null) { 599 mPatternInProgress = false; 600 mOnPatternListener.onPatternCleared(); 601 } 602 if (hitCell != null) { 603 final float startX = getCenterXForColumn(hitCell.column); 604 final float startY = getCenterYForRow(hitCell.row); 605 606 final float widthOffset = mSquareWidth / 2f; 607 final float heightOffset = mSquareHeight / 2f; 608 609 invalidate((int) (startX - widthOffset), (int) (startY - heightOffset), 610 (int) (startX + widthOffset), (int) (startY + heightOffset)); 611 } 612 mInProgressX = x; 613 mInProgressY = y; 614 if (PROFILE_DRAWING) { 615 if (!mDrawingProfilingStarted) { 616 Debug.startMethodTracing("LockPatternDrawing"); 617 mDrawingProfilingStarted = true; 618 } 619 } 620 return true; 621 case MotionEvent.ACTION_UP: 622 // report pattern detected 623 if (!mPattern.isEmpty() && mOnPatternListener != null) { 624 mPatternInProgress = false; 625 mOnPatternListener.onPatternDetected(mPattern); 626 invalidate(); 627 } 628 if (PROFILE_DRAWING) { 629 if (mDrawingProfilingStarted) { 630 Debug.stopMethodTracing(); 631 mDrawingProfilingStarted = false; 632 } 633 } 634 return true; 635 case MotionEvent.ACTION_MOVE: 636 final int patternSizePreHitDetect = mPattern.size(); 637 hitCell = detectAndAddHit(x, y); 638 final int patternSize = mPattern.size(); 639 if (hitCell != null && (mOnPatternListener != null) && (patternSize == 1)) { 640 mPatternInProgress = true; 641 mOnPatternListener.onPatternStart(); 642 } 643 // note current x and y for rubber banding of in progress 644 // patterns 645 final float dx = Math.abs(x - mInProgressX); 646 final float dy = Math.abs(y - mInProgressY); 647 if (dx + dy > mSquareWidth * 0.01f) { 648 float oldX = mInProgressX; 649 float oldY = mInProgressY; 650 651 mInProgressX = x; 652 mInProgressY = y; 653 654 if (mPatternInProgress && patternSize > 0) { 655 final ArrayList<Cell> pattern = mPattern; 656 final float radius = mSquareWidth * mDiameterFactor * 0.5f; 657 658 final Cell lastCell = pattern.get(patternSize - 1); 659 660 float startX = getCenterXForColumn(lastCell.column); 661 float startY = getCenterYForRow(lastCell.row); 662 663 float left; 664 float top; 665 float right; 666 float bottom; 667 668 final Rect invalidateRect = mInvalidate; 669 670 if (startX < x) { 671 left = startX; 672 right = x; 673 } else { 674 left = x; 675 right = startX; 676 } 677 678 if (startY < y) { 679 top = startY; 680 bottom = y; 681 } else { 682 top = y; 683 bottom = startY; 684 } 685 686 // Invalidate between the pattern's last cell and the current location 687 invalidateRect.set((int) (left - radius), (int) (top - radius), 688 (int) (right + radius), (int) (bottom + radius)); 689 690 if (startX < oldX) { 691 left = startX; 692 right = oldX; 693 } else { 694 left = oldX; 695 right = startX; 696 } 697 698 if (startY < oldY) { 699 top = startY; 700 bottom = oldY; 701 } else { 702 top = oldY; 703 bottom = startY; 704 } 705 706 // Invalidate between the pattern's last cell and the previous location 707 invalidateRect.union((int) (left - radius), (int) (top - radius), 708 (int) (right + radius), (int) (bottom + radius)); 709 710 // Invalidate between the pattern's new cell and the pattern's previous cell 711 if (hitCell != null) { 712 startX = getCenterXForColumn(hitCell.column); 713 startY = getCenterYForRow(hitCell.row); 714 715 if (patternSize >= 2) { 716 // (re-using hitcell for old cell) 717 hitCell = pattern.get(patternSize - 1 - (patternSize - patternSizePreHitDetect)); 718 oldX = getCenterXForColumn(hitCell.column); 719 oldY = getCenterYForRow(hitCell.row); 720 721 if (startX < oldX) { 722 left = startX; 723 right = oldX; 724 } else { 725 left = oldX; 726 right = startX; 727 } 728 729 if (startY < oldY) { 730 top = startY; 731 bottom = oldY; 732 } else { 733 top = oldY; 734 bottom = startY; 735 } 736 } else { 737 left = right = startX; 738 top = bottom = startY; 739 } 740 741 final float widthOffset = mSquareWidth / 2f; 742 final float heightOffset = mSquareHeight / 2f; 743 744 invalidateRect.set((int) (left - widthOffset), 745 (int) (top - heightOffset), (int) (right + widthOffset), 746 (int) (bottom + heightOffset)); 747 } 748 749 invalidate(invalidateRect); 750 } else { 751 invalidate(); 752 } 753 } 754 return true; 755 case MotionEvent.ACTION_CANCEL: 756 resetPattern(); 757 if (mOnPatternListener != null) { 758 mPatternInProgress = false; 759 mOnPatternListener.onPatternCleared(); 760 } 761 if (PROFILE_DRAWING) { 762 if (mDrawingProfilingStarted) { 763 Debug.stopMethodTracing(); 764 mDrawingProfilingStarted = false; 765 } 766 } 767 return true; 768 } 769 return false; 770 } 771 772 private float getCenterXForColumn(int column) { 773 return mPaddingLeft + column * mSquareWidth + mSquareWidth / 2f; 774 } 775 776 private float getCenterYForRow(int row) { 777 return mPaddingTop + row * mSquareHeight + mSquareHeight / 2f; 778 } 779 780 @Override 781 protected void onDraw(Canvas canvas) { 782 final ArrayList<Cell> pattern = mPattern; 783 final int count = pattern.size(); 784 final boolean[][] drawLookup = mPatternDrawLookup; 785 786 if (mPatternDisplayMode == DisplayMode.Animate) { 787 788 // figure out which circles to draw 789 790 // + 1 so we pause on complete pattern 791 final int oneCycle = (count + 1) * MILLIS_PER_CIRCLE_ANIMATING; 792 final int spotInCycle = (int) (SystemClock.elapsedRealtime() - 793 mAnimatingPeriodStart) % oneCycle; 794 final int numCircles = spotInCycle / MILLIS_PER_CIRCLE_ANIMATING; 795 796 clearPatternDrawLookup(); 797 for (int i = 0; i < numCircles; i++) { 798 final Cell cell = pattern.get(i); 799 drawLookup[cell.getRow()][cell.getColumn()] = true; 800 } 801 802 // figure out in progress portion of ghosting line 803 804 final boolean needToUpdateInProgressPoint = numCircles > 0 805 && numCircles < count; 806 807 if (needToUpdateInProgressPoint) { 808 final float percentageOfNextCircle = 809 ((float) (spotInCycle % MILLIS_PER_CIRCLE_ANIMATING)) / 810 MILLIS_PER_CIRCLE_ANIMATING; 811 812 final Cell currentCell = pattern.get(numCircles - 1); 813 final float centerX = getCenterXForColumn(currentCell.column); 814 final float centerY = getCenterYForRow(currentCell.row); 815 816 final Cell nextCell = pattern.get(numCircles); 817 final float dx = percentageOfNextCircle * 818 (getCenterXForColumn(nextCell.column) - centerX); 819 final float dy = percentageOfNextCircle * 820 (getCenterYForRow(nextCell.row) - centerY); 821 mInProgressX = centerX + dx; 822 mInProgressY = centerY + dy; 823 } 824 // TODO: Infinite loop here... 825 invalidate(); 826 } 827 828 final float squareWidth = mSquareWidth; 829 final float squareHeight = mSquareHeight; 830 831 float radius = (squareWidth * mDiameterFactor * 0.5f); 832 mPathPaint.setStrokeWidth(radius); 833 834 final Path currentPath = mCurrentPath; 835 currentPath.rewind(); 836 837 // TODO: the path should be created and cached every time we hit-detect a cell 838 // only the last segment of the path should be computed here 839 // draw the path of the pattern (unless the user is in progress, and 840 // we are in stealth mode) 841 final boolean drawPath = (!mInStealthMode || mPatternDisplayMode == DisplayMode.Wrong); 842 if (drawPath) { 843 boolean anyCircles = false; 844 for (int i = 0; i < count; i++) { 845 Cell cell = pattern.get(i); 846 847 // only draw the part of the pattern stored in 848 // the lookup table (this is only different in the case 849 // of animation). 850 if (!drawLookup[cell.row][cell.column]) { 851 break; 852 } 853 anyCircles = true; 854 855 float centerX = getCenterXForColumn(cell.column); 856 float centerY = getCenterYForRow(cell.row); 857 if (i == 0) { 858 currentPath.moveTo(centerX, centerY); 859 } else { 860 currentPath.lineTo(centerX, centerY); 861 } 862 } 863 864 // add last in progress section 865 if ((mPatternInProgress || mPatternDisplayMode == DisplayMode.Animate) 866 && anyCircles) { 867 currentPath.lineTo(mInProgressX, mInProgressY); 868 } 869 canvas.drawPath(currentPath, mPathPaint); 870 } 871 872 // draw the circles 873 final int paddingTop = mPaddingTop; 874 final int paddingLeft = mPaddingLeft; 875 876 for (int i = 0; i < 3; i++) { 877 float topY = paddingTop + i * squareHeight; 878 //float centerY = mPaddingTop + i * mSquareHeight + (mSquareHeight / 2); 879 for (int j = 0; j < 3; j++) { 880 float leftX = paddingLeft + j * squareWidth; 881 drawCircle(canvas, (int) leftX, (int) topY, drawLookup[i][j]); 882 } 883 } 884 885 // draw the arrows associated with the path (unless the user is in progress, and 886 // we are in stealth mode) 887 boolean oldFlag = (mPaint.getFlags() & Paint.FILTER_BITMAP_FLAG) != 0; 888 mPaint.setFilterBitmap(true); // draw with higher quality since we render with transforms 889 if (drawPath) { 890 for (int i = 0; i < count - 1; i++) { 891 Cell cell = pattern.get(i); 892 Cell next = pattern.get(i + 1); 893 894 // only draw the part of the pattern stored in 895 // the lookup table (this is only different in the case 896 // of animation). 897 if (!drawLookup[next.row][next.column]) { 898 break; 899 } 900 901 float leftX = paddingLeft + cell.column * squareWidth; 902 float topY = paddingTop + cell.row * squareHeight; 903 904 drawArrow(canvas, leftX, topY, cell, next); 905 } 906 } 907 mPaint.setFilterBitmap(oldFlag); // restore default flag 908 } 909 910 private void drawArrow(Canvas canvas, float leftX, float topY, Cell start, Cell end) { 911 boolean green = mPatternDisplayMode != DisplayMode.Wrong; 912 913 final int endRow = end.row; 914 final int startRow = start.row; 915 final int endColumn = end.column; 916 final int startColumn = start.column; 917 918 // offsets for centering the bitmap in the cell 919 final int offsetX = ((int) mSquareWidth - mBitmapWidth) / 2; 920 final int offsetY = ((int) mSquareHeight - mBitmapHeight) / 2; 921 922 // compute transform to place arrow bitmaps at correct angle inside circle. 923 // This assumes that the arrow image is drawn at 12:00 with it's top edge 924 // coincident with the circle bitmap's top edge. 925 Bitmap arrow = green ? mBitmapArrowGreenUp : mBitmapArrowRedUp; 926 Matrix matrix = new Matrix(); 927 final int cellWidth = mBitmapCircleDefault.getWidth(); 928 final int cellHeight = mBitmapCircleDefault.getHeight(); 929 930 // the up arrow bitmap is at 12:00, so find the rotation from x axis and add 90 degrees. 931 final float theta = (float) Math.atan2( 932 (double) (endRow - startRow), (double) (endColumn - startColumn)); 933 final float angle = (float) Math.toDegrees(theta) + 90.0f; 934 935 // compose matrix 936 matrix.setTranslate(leftX + offsetX, topY + offsetY); // transform to cell position 937 matrix.preRotate(angle, cellWidth / 2.0f, cellHeight / 2.0f); // rotate about cell center 938 matrix.preTranslate((cellWidth - arrow.getWidth()) / 2.0f, 0.0f); // translate to 12:00 pos 939 canvas.drawBitmap(arrow, matrix, mPaint); 940 } 941 942 /** 943 * @param canvas 944 * @param leftX 945 * @param topY 946 * @param partOfPattern Whether this circle is part of the pattern. 947 */ 948 private void drawCircle(Canvas canvas, int leftX, int topY, boolean partOfPattern) { 949 Bitmap outerCircle; 950 Bitmap innerCircle; 951 952 if (!partOfPattern || (mInStealthMode && mPatternDisplayMode != DisplayMode.Wrong)) { 953 // unselected circle 954 outerCircle = mBitmapCircleDefault; 955 innerCircle = mBitmapBtnDefault; 956 } else if (mPatternInProgress) { 957 // user is in middle of drawing a pattern 958 outerCircle = mBitmapCircleGreen; 959 innerCircle = mBitmapBtnTouched; 960 } else if (mPatternDisplayMode == DisplayMode.Wrong) { 961 // the pattern is wrong 962 outerCircle = mBitmapCircleRed; 963 innerCircle = mBitmapBtnDefault; 964 } else if (mPatternDisplayMode == DisplayMode.Correct || 965 mPatternDisplayMode == DisplayMode.Animate) { 966 // the pattern is correct 967 outerCircle = mBitmapCircleGreen; 968 innerCircle = mBitmapBtnDefault; 969 } else { 970 throw new IllegalStateException("unknown display mode " + mPatternDisplayMode); 971 } 972 973 final int width = mBitmapWidth; 974 final int height = mBitmapHeight; 975 976 final float squareWidth = mSquareWidth; 977 final float squareHeight = mSquareHeight; 978 979 int offsetX = (int) ((squareWidth - width) / 2f); 980 int offsetY = (int) ((squareHeight - height) / 2f); 981 982 canvas.drawBitmap(outerCircle, leftX + offsetX, topY + offsetY, mPaint); 983 canvas.drawBitmap(innerCircle, leftX + offsetX, topY + offsetY, mPaint); 984 } 985 986 @Override 987 protected Parcelable onSaveInstanceState() { 988 Parcelable superState = super.onSaveInstanceState(); 989 return new SavedState(superState, 990 LockPatternUtils.patternToString(mPattern), 991 mPatternDisplayMode.ordinal(), 992 mInputEnabled, mInStealthMode, mTactileFeedbackEnabled); 993 } 994 995 @Override 996 protected void onRestoreInstanceState(Parcelable state) { 997 final SavedState ss = (SavedState) state; 998 super.onRestoreInstanceState(ss.getSuperState()); 999 setPattern( 1000 DisplayMode.Correct, 1001 LockPatternUtils.stringToPattern(ss.getSerializedPattern())); 1002 mPatternDisplayMode = DisplayMode.values()[ss.getDisplayMode()]; 1003 mInputEnabled = ss.isInputEnabled(); 1004 mInStealthMode = ss.isInStealthMode(); 1005 mTactileFeedbackEnabled = ss.isTactileFeedbackEnabled(); 1006 } 1007 1008 /** 1009 * The parecelable for saving and restoring a lock pattern view. 1010 */ 1011 private static class SavedState extends BaseSavedState { 1012 1013 private final String mSerializedPattern; 1014 private final int mDisplayMode; 1015 private final boolean mInputEnabled; 1016 private final boolean mInStealthMode; 1017 private final boolean mTactileFeedbackEnabled; 1018 1019 /** 1020 * Constructor called from {@link LockPatternView#onSaveInstanceState()} 1021 */ 1022 private SavedState(Parcelable superState, String serializedPattern, int displayMode, 1023 boolean inputEnabled, boolean inStealthMode, boolean tactileFeedbackEnabled) { 1024 super(superState); 1025 mSerializedPattern = serializedPattern; 1026 mDisplayMode = displayMode; 1027 mInputEnabled = inputEnabled; 1028 mInStealthMode = inStealthMode; 1029 mTactileFeedbackEnabled = tactileFeedbackEnabled; 1030 } 1031 1032 /** 1033 * Constructor called from {@link #CREATOR} 1034 */ 1035 private SavedState(Parcel in) { 1036 super(in); 1037 mSerializedPattern = in.readString(); 1038 mDisplayMode = in.readInt(); 1039 mInputEnabled = (Boolean) in.readValue(null); 1040 mInStealthMode = (Boolean) in.readValue(null); 1041 mTactileFeedbackEnabled = (Boolean) in.readValue(null); 1042 } 1043 1044 public String getSerializedPattern() { 1045 return mSerializedPattern; 1046 } 1047 1048 public int getDisplayMode() { 1049 return mDisplayMode; 1050 } 1051 1052 public boolean isInputEnabled() { 1053 return mInputEnabled; 1054 } 1055 1056 public boolean isInStealthMode() { 1057 return mInStealthMode; 1058 } 1059 1060 public boolean isTactileFeedbackEnabled(){ 1061 return mTactileFeedbackEnabled; 1062 } 1063 1064 @Override 1065 public void writeToParcel(Parcel dest, int flags) { 1066 super.writeToParcel(dest, flags); 1067 dest.writeString(mSerializedPattern); 1068 dest.writeInt(mDisplayMode); 1069 dest.writeValue(mInputEnabled); 1070 dest.writeValue(mInStealthMode); 1071 dest.writeValue(mTactileFeedbackEnabled); 1072 } 1073 1074 public static final Parcelable.Creator<SavedState> CREATOR = 1075 new Creator<SavedState>() { 1076 public SavedState createFromParcel(Parcel in) { 1077 return new SavedState(in); 1078 } 1079 1080 public SavedState[] newArray(int size) { 1081 return new SavedState[size]; 1082 } 1083 }; 1084 } 1085 } 1086
