LockPatternView.java revision 6a109b4874b79d9bf8f5d990bfe831a59e5a83dc
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 17package com.android.internal.widget; 18 19 20import com.android.internal.R; 21 22import android.content.Context; 23import android.graphics.Bitmap; 24import android.graphics.BitmapFactory; 25import android.graphics.Canvas; 26import android.graphics.Color; 27import android.graphics.Matrix; 28import android.graphics.Paint; 29import android.graphics.Path; 30import android.graphics.Rect; 31import android.os.Debug; 32import android.os.Parcel; 33import android.os.Parcelable; 34import android.os.SystemClock; 35import android.os.Vibrator; 36import android.util.AttributeSet; 37import android.view.MotionEvent; 38import android.view.View; 39 40import java.util.ArrayList; 41import java.util.List; 42 43/** 44 * Displays and detects the user's unlock attempt, which is a drag of a finger 45 * across 9 regions of the screen. 46 * 47 * Is also capable of displaying a static pattern in "in progress", "wrong" or 48 * "correct" states. 49 */ 50public class LockPatternView extends View { 51 // Vibrator pattern for creating a tactile bump 52 private static final long[] VIBE_PATTERN = {0, 1, 40, 41}; 53 54 private static final boolean PROFILE_DRAWING = false; 55 private boolean mDrawingProfilingStarted = false; 56 57 private Paint mPaint = new Paint(); 58 private Paint mPathPaint = new Paint(); 59 60 // TODO: make this common with PhoneWindow 61 static final int STATUS_BAR_HEIGHT = 25; 62 63 /** 64 * How many milliseconds we spend animating each circle of a lock pattern 65 * if the animating mode is set. The entire animation should take this 66 * constant * the length of the pattern to complete. 67 */ 68 private static final int MILLIS_PER_CIRCLE_ANIMATING = 700; 69 70 private OnPatternListener mOnPatternListener; 71 private ArrayList<Cell> mPattern = new ArrayList<Cell>(9); 72 73 /** 74 * Lookup table for the circles of the pattern we are currently drawing. 75 * This will be the cells of the complete pattern unless we are animating, 76 * in which case we use this to hold the cells we are drawing for the in 77 * progress animation. 78 */ 79 private boolean[][] mPatternDrawLookup = new boolean[3][3]; 80 81 /** 82 * the in progress point: 83 * - during interaction: where the user's finger is 84 * - during animation: the current tip of the animating line 85 */ 86 private float mInProgressX = -1; 87 private float mInProgressY = -1; 88 89 private long mAnimatingPeriodStart; 90 91 private DisplayMode mPatternDisplayMode = DisplayMode.Correct; 92 private boolean mInputEnabled = true; 93 private boolean mInStealthMode = false; 94 private boolean mTactileFeedbackEnabled = true; 95 private boolean mPatternInProgress = false; 96 97 private float mDiameterFactor = 0.5f; 98 private float mHitFactor = 0.6f; 99 100 private float mSquareWidth; 101 private float mSquareHeight; 102 103 private Bitmap mBitmapBtnDefault; 104 private Bitmap mBitmapBtnTouched; 105 private Bitmap mBitmapCircleDefault; 106 private Bitmap mBitmapCircleGreen; 107 private Bitmap mBitmapCircleRed; 108 109 private Bitmap mBitmapArrowGreenUp; 110 private Bitmap mBitmapArrowRedUp; 111 112 private final Path mCurrentPath = new Path(); 113 private final Rect mInvalidate = new Rect(); 114 115 private int mBitmapWidth; 116 private int mBitmapHeight; 117 118 119 private Vibrator vibe; // Vibrator for creating tactile feedback 120 121 /** 122 * Represents a cell in the 3 X 3 matrix of the unlock pattern view. 123 */ 124 public static class Cell { 125 int row; 126 int column; 127 128 // keep # objects limited to 9 129 static Cell[][] sCells = new Cell[3][3]; 130 static { 131 for (int i = 0; i < 3; i++) { 132 for (int j = 0; j < 3; j++) { 133 sCells[i][j] = new Cell(i, j); 134 } 135 } 136 } 137 138 /** 139 * @param row The row of the cell. 140 * @param column The column of the cell. 141 */ 142 private Cell(int row, int column) { 143 checkRange(row, column); 144 this.row = row; 145 this.column = column; 146 } 147 148 public int getRow() { 149 return row; 150 } 151 152 public int getColumn() { 153 return column; 154 } 155 156 /** 157 * @param row The row of the cell. 158 * @param column The column of the cell. 159 */ 160 public static synchronized Cell of(int row, int column) { 161 checkRange(row, column); 162 return sCells[row][column]; 163 } 164 165 private static void checkRange(int row, int column) { 166 if (row < 0 || row > 2) { 167 throw new IllegalArgumentException("row must be in range 0-2"); 168 } 169 if (column < 0 || column > 2) { 170 throw new IllegalArgumentException("column must be in range 0-2"); 171 } 172 } 173 174 public String toString() { 175 return "(row=" + row + ",clmn=" + column + ")"; 176 } 177 } 178 179 /** 180 * How to display the current pattern. 181 */ 182 public enum DisplayMode { 183 184 /** 185 * The pattern drawn is correct (i.e draw it in a friendly color) 186 */ 187 Correct, 188 189 /** 190 * Animate the pattern (for demo, and help). 191 */ 192 Animate, 193 194 /** 195 * The pattern is wrong (i.e draw a foreboding color) 196 */ 197 Wrong 198 } 199 200 /** 201 * The call back interface for detecting patterns entered by the user. 202 */ 203 public static interface OnPatternListener { 204 205 /** 206 * A new pattern has begun. 207 */ 208 void onPatternStart(); 209 210 /** 211 * The pattern was cleared. 212 */ 213 void onPatternCleared(); 214 215 /** 216 * A pattern was detected from the user. 217 * @param pattern The pattern. 218 */ 219 void onPatternDetected(List<Cell> pattern); 220 } 221 222 public LockPatternView(Context context) { 223 this(context, null); 224 } 225 226 public LockPatternView(Context context, AttributeSet attrs) { 227 super(context, attrs); 228 vibe = new Vibrator(); 229 230 setClickable(true); 231 232 mPathPaint.setAntiAlias(true); 233 mPathPaint.setDither(true); 234 mPathPaint.setColor(Color.WHITE); // TODO this should be from the style 235 mPathPaint.setAlpha(128); 236 mPathPaint.setStyle(Paint.Style.STROKE); 237 mPathPaint.setStrokeJoin(Paint.Join.ROUND); 238 mPathPaint.setStrokeCap(Paint.Cap.ROUND); 239 240 // lot's of bitmaps! 241 mBitmapBtnDefault = getBitmapFor(R.drawable.btn_code_lock_default); 242 mBitmapBtnTouched = getBitmapFor(R.drawable.btn_code_lock_touched); 243 mBitmapCircleDefault = getBitmapFor(R.drawable.indicator_code_lock_point_area_default); 244 mBitmapCircleGreen = getBitmapFor(R.drawable.indicator_code_lock_point_area_green); 245 mBitmapCircleRed = getBitmapFor(R.drawable.indicator_code_lock_point_area_red); 246 247 mBitmapArrowGreenUp = getBitmapFor(R.drawable.indicator_code_lock_drag_direction_green_up); 248 mBitmapArrowRedUp = getBitmapFor(R.drawable.indicator_code_lock_drag_direction_red_up); 249 250 // we assume all bitmaps have the same size 251 mBitmapWidth = mBitmapBtnDefault.getWidth(); 252 mBitmapHeight = mBitmapBtnDefault.getHeight(); 253 } 254 255 private Bitmap getBitmapFor(int resId) { 256 return BitmapFactory.decodeResource(getContext().getResources(), resId); 257 } 258 259 /** 260 * @return Whether the view is in stealth mode. 261 */ 262 public boolean isInStealthMode() { 263 return mInStealthMode; 264 } 265 266 /** 267 * @return Whether the view has tactile feedback enabled. 268 */ 269 public boolean isTactileFeedbackEnabled() { 270 return mTactileFeedbackEnabled; 271 } 272 273 /** 274 * Set whether the view is in stealth mode. If true, there will be no 275 * visible feedback as the user enters the pattern. 276 * 277 * @param inStealthMode Whether in stealth mode. 278 */ 279 public void setInStealthMode(boolean inStealthMode) { 280 mInStealthMode = inStealthMode; 281 } 282 283 /** 284 * Set whether the view will use tactile feedback. If true, there will be 285 * tactile feedback as the user enters the pattern. 286 * 287 * @param tactileFeedbackEnabled Whether tactile feedback is enabled 288 */ 289 public void setTactileFeedbackEnabled(boolean tactileFeedbackEnabled) { 290 mTactileFeedbackEnabled = tactileFeedbackEnabled; 291 } 292 293 /** 294 * Set the call back for pattern detection. 295 * @param onPatternListener The call back. 296 */ 297 public void setOnPatternListener( 298 OnPatternListener onPatternListener) { 299 mOnPatternListener = onPatternListener; 300 } 301 302 /** 303 * Set the pattern explicitely (rather than waiting for the user to input 304 * a pattern). 305 * @param displayMode How to display the pattern. 306 * @param pattern The pattern. 307 */ 308 public void setPattern(DisplayMode displayMode, List<Cell> pattern) { 309 mPattern.clear(); 310 mPattern.addAll(pattern); 311 clearPatternDrawLookup(); 312 for (Cell cell : pattern) { 313 mPatternDrawLookup[cell.getRow()][cell.getColumn()] = true; 314 } 315 316 setDisplayMode(displayMode); 317 } 318 319 /** 320 * Set the display mode of the current pattern. This can be useful, for 321 * instance, after detecting a pattern to tell this view whether change the 322 * in progress result to correct or wrong. 323 * @param displayMode The display mode. 324 */ 325 public void setDisplayMode(DisplayMode displayMode) { 326 mPatternDisplayMode = displayMode; 327 if (displayMode == DisplayMode.Animate) { 328 if (mPattern.size() == 0) { 329 throw new IllegalStateException("you must have a pattern to " 330 + "animate if you want to set the display mode to animate"); 331 } 332 mAnimatingPeriodStart = SystemClock.elapsedRealtime(); 333 final Cell first = mPattern.get(0); 334 mInProgressX = getCenterXForColumn(first.getColumn()); 335 mInProgressY = getCenterYForRow(first.getRow()); 336 clearPatternDrawLookup(); 337 } 338 invalidate(); 339 } 340 341 /** 342 * Clear the pattern. 343 */ 344 public void clearPattern() { 345 resetPattern(); 346 } 347 348 /** 349 * Reset all pattern state. 350 */ 351 private void resetPattern() { 352 mPattern.clear(); 353 clearPatternDrawLookup(); 354 mPatternDisplayMode = DisplayMode.Correct; 355 invalidate(); 356 } 357 358 /** 359 * Clear the pattern lookup table. 360 */ 361 private void clearPatternDrawLookup() { 362 for (int i = 0; i < 3; i++) { 363 for (int j = 0; j < 3; j++) { 364 mPatternDrawLookup[i][j] = false; 365 } 366 } 367 } 368 369 /** 370 * Disable input (for instance when displaying a message that will 371 * timeout so user doesn't get view into messy state). 372 */ 373 public void disableInput() { 374 mInputEnabled = false; 375 } 376 377 /** 378 * Enable input. 379 */ 380 public void enableInput() { 381 mInputEnabled = true; 382 } 383 384 @Override 385 protected void onSizeChanged(int w, int h, int oldw, int oldh) { 386 final int width = w - mPaddingLeft - mPaddingRight; 387 mSquareWidth = width / 3.0f; 388 389 final int height = h - mPaddingTop - mPaddingBottom; 390 mSquareHeight = height / 3.0f; 391 } 392 393 @Override 394 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 395 final int width = MeasureSpec.getSize(widthMeasureSpec); 396 final int height = MeasureSpec.getSize(heightMeasureSpec); 397 final int squareSide = Math.min(width, height); 398 setMeasuredDimension(squareSide, squareSide); 399 } 400 401 /** 402 * Determines whether the point x, y will add a new point to the current 403 * pattern (in addition to finding the cell, also makes heuristic choices 404 * such as filling in gaps based on current pattern). 405 * @param x The x coordinate. 406 * @param y The y coordinate. 407 */ 408 private Cell detectAndAddHit(float x, float y) { 409 final Cell cell = checkForNewHit(x, y); 410 if (cell != null) { 411 412 // check for gaps in existing pattern 413 Cell fillInGapCell = null; 414 final ArrayList<Cell> pattern = mPattern; 415 if (!pattern.isEmpty()) { 416 final Cell lastCell = pattern.get(pattern.size() - 1); 417 int dRow = cell.row - lastCell.row; 418 int dColumn = cell.column - lastCell.column; 419 420 int fillInRow = lastCell.row; 421 int fillInColumn = lastCell.column; 422 423 if (Math.abs(dRow) == 2 && Math.abs(dColumn) != 1) { 424 fillInRow = lastCell.row + ((dRow > 0) ? 1 : -1); 425 } 426 427 if (Math.abs(dColumn) == 2 && Math.abs(dRow) != 1) { 428 fillInColumn = lastCell.column + ((dColumn > 0) ? 1 : -1); 429 } 430 431 fillInGapCell = Cell.of(fillInRow, fillInColumn); 432 } 433 434 if (fillInGapCell != null && 435 !mPatternDrawLookup[fillInGapCell.row][fillInGapCell.column]) { 436 addCellToPattern(fillInGapCell); 437 } 438 addCellToPattern(cell); 439 if (mTactileFeedbackEnabled){ 440 vibe.vibrate(VIBE_PATTERN, -1); // Generate tactile feedback 441 } 442 return cell; 443 } 444 return null; 445 } 446 447 private void addCellToPattern(Cell newCell) { 448 mPatternDrawLookup[newCell.getRow()][newCell.getColumn()] = true; 449 mPattern.add(newCell); 450 } 451 452 // helper method to find which cell a point maps to 453 private Cell checkForNewHit(float x, float y) { 454 455 final int rowHit = getRowHit(y); 456 if (rowHit < 0) { 457 return null; 458 } 459 final int columnHit = getColumnHit(x); 460 if (columnHit < 0) { 461 return null; 462 } 463 464 if (mPatternDrawLookup[rowHit][columnHit]) { 465 return null; 466 } 467 return Cell.of(rowHit, columnHit); 468 } 469 470 /** 471 * Helper method to find the row that y falls into. 472 * @param y The y coordinate 473 * @return The row that y falls in, or -1 if it falls in no row. 474 */ 475 private int getRowHit(float y) { 476 477 final float squareHeight = mSquareHeight; 478 float hitSize = squareHeight * mHitFactor; 479 480 float offset = mPaddingTop + (squareHeight - hitSize) / 2f; 481 for (int i = 0; i < 3; i++) { 482 483 final float hitTop = offset + squareHeight * i; 484 if (y >= hitTop && y <= hitTop + hitSize) { 485 return i; 486 } 487 } 488 return -1; 489 } 490 491 /** 492 * Helper method to find the column x fallis into. 493 * @param x The x coordinate. 494 * @return The column that x falls in, or -1 if it falls in no column. 495 */ 496 private int getColumnHit(float x) { 497 final float squareWidth = mSquareWidth; 498 float hitSize = squareWidth * mHitFactor; 499 500 float offset = mPaddingLeft + (squareWidth - hitSize) / 2f; 501 for (int i = 0; i < 3; i++) { 502 503 final float hitLeft = offset + squareWidth * i; 504 if (x >= hitLeft && x <= hitLeft + hitSize) { 505 return i; 506 } 507 } 508 return -1; 509 } 510 511 @Override 512 public boolean onTouchEvent(MotionEvent motionEvent) { 513 if (!mInputEnabled || !isEnabled()) { 514 return false; 515 } 516 517 final float x = motionEvent.getX(); 518 final float y = motionEvent.getY(); 519 Cell hitCell; 520 switch(motionEvent.getAction()) { 521 case MotionEvent.ACTION_DOWN: 522 resetPattern(); 523 hitCell = detectAndAddHit(x, y); 524 if (hitCell != null && mOnPatternListener != null) { 525 mPatternInProgress = true; 526 mPatternDisplayMode = DisplayMode.Correct; 527 mOnPatternListener.onPatternStart(); 528 } else if (mOnPatternListener != null) { 529 mPatternInProgress = false; 530 mOnPatternListener.onPatternCleared(); 531 } 532 if (hitCell != null) { 533 final float startX = getCenterXForColumn(hitCell.column); 534 final float startY = getCenterYForRow(hitCell.row); 535 536 final float widthOffset = mSquareWidth / 2f; 537 final float heightOffset = mSquareHeight / 2f; 538 539 invalidate((int) (startX - widthOffset), (int) (startY - heightOffset), 540 (int) (startX + widthOffset), (int) (startY + heightOffset)); 541 } 542 mInProgressX = x; 543 mInProgressY = y; 544 if (PROFILE_DRAWING) { 545 if (!mDrawingProfilingStarted) { 546 Debug.startMethodTracing("LockPatternDrawing"); 547 mDrawingProfilingStarted = true; 548 } 549 } 550 return true; 551 case MotionEvent.ACTION_UP: 552 // report pattern detected 553 if (!mPattern.isEmpty() && mOnPatternListener != null) { 554 mPatternInProgress = false; 555 mOnPatternListener.onPatternDetected(mPattern); 556 invalidate(); 557 } 558 if (PROFILE_DRAWING) { 559 if (mDrawingProfilingStarted) { 560 Debug.stopMethodTracing(); 561 mDrawingProfilingStarted = false; 562 } 563 } 564 return true; 565 case MotionEvent.ACTION_MOVE: 566 final int patternSizePreHitDetect = mPattern.size(); 567 hitCell = detectAndAddHit(x, y); 568 final int patternSize = mPattern.size(); 569 if (hitCell != null && (mOnPatternListener != null) && (patternSize == 1)) { 570 mPatternInProgress = true; 571 mOnPatternListener.onPatternStart(); 572 } 573 // note current x and y for rubber banding of in progress 574 // patterns 575 final float dx = Math.abs(x - mInProgressX); 576 final float dy = Math.abs(y - mInProgressY); 577 if (dx + dy > mSquareWidth * 0.01f) { 578 float oldX = mInProgressX; 579 float oldY = mInProgressY; 580 581 mInProgressX = x; 582 mInProgressY = y; 583 584 if (mPatternInProgress) { 585 final ArrayList<Cell> pattern = mPattern; 586 final float radius = mSquareWidth * mDiameterFactor * 0.5f; 587 588 Cell cell = pattern.get(patternSize - 1); 589 590 float startX = getCenterXForColumn(cell.column); 591 float startY = getCenterYForRow(cell.row); 592 593 float left; 594 float top; 595 float right; 596 float bottom; 597 598 final Rect invalidateRect = mInvalidate; 599 600 if (startX < x) { 601 left = startX; 602 right = x; 603 } else { 604 left = x; 605 right = startX; 606 } 607 608 if (startY < y) { 609 top = startY; 610 bottom = y; 611 } else { 612 top = y; 613 bottom = startY; 614 } 615 616 // Invalidate between the pattern's last cell and the current location 617 invalidateRect.set((int) (left - radius), (int) (top - radius), 618 (int) (right + radius), (int) (bottom + radius)); 619 620 if (startX < oldX) { 621 left = startX; 622 right = oldX; 623 } else { 624 left = oldX; 625 right = startX; 626 } 627 628 if (startY < oldY) { 629 top = startY; 630 bottom = oldY; 631 } else { 632 top = oldY; 633 bottom = startY; 634 } 635 636 // Invalidate between the pattern's last cell and the previous location 637 invalidateRect.union((int) (left - radius), (int) (top - radius), 638 (int) (right + radius), (int) (bottom + radius)); 639 640 // Invalidate between the pattern's new cell and the pattern's previous cell 641 if (hitCell != null) { 642 startX = getCenterXForColumn(hitCell.column); 643 startY = getCenterYForRow(hitCell.row); 644 645 if (patternSize >= 2) { 646 // (re-using hitcell for old cell) 647 hitCell = pattern.get(patternSize - 1 - (patternSize - patternSizePreHitDetect)); 648 oldX = getCenterXForColumn(hitCell.column); 649 oldY = getCenterYForRow(hitCell.row); 650 651 if (startX < oldX) { 652 left = startX; 653 right = oldX; 654 } else { 655 left = oldX; 656 right = startX; 657 } 658 659 if (startY < oldY) { 660 top = startY; 661 bottom = oldY; 662 } else { 663 top = oldY; 664 bottom = startY; 665 } 666 } else { 667 left = right = startX; 668 top = bottom = startY; 669 } 670 671 final float widthOffset = mSquareWidth / 2f; 672 final float heightOffset = mSquareHeight / 2f; 673 674 invalidateRect.set((int) (left - widthOffset), 675 (int) (top - heightOffset), (int) (right + widthOffset), 676 (int) (bottom + heightOffset)); 677 } 678 679 invalidate(invalidateRect); 680 } else { 681 invalidate(); 682 } 683 } 684 return true; 685 case MotionEvent.ACTION_CANCEL: 686 resetPattern(); 687 if (mOnPatternListener != null) { 688 mPatternInProgress = false; 689 mOnPatternListener.onPatternCleared(); 690 } 691 if (PROFILE_DRAWING) { 692 if (mDrawingProfilingStarted) { 693 Debug.stopMethodTracing(); 694 mDrawingProfilingStarted = false; 695 } 696 } 697 return true; 698 } 699 return false; 700 } 701 702 private float getCenterXForColumn(int column) { 703 return mPaddingLeft + column * mSquareWidth + mSquareWidth / 2f; 704 } 705 706 private float getCenterYForRow(int row) { 707 return mPaddingTop + row * mSquareHeight + mSquareHeight / 2f; 708 } 709 710 @Override 711 protected void onDraw(Canvas canvas) { 712 final ArrayList<Cell> pattern = mPattern; 713 final int count = pattern.size(); 714 final boolean[][] drawLookup = mPatternDrawLookup; 715 716 if (mPatternDisplayMode == DisplayMode.Animate) { 717 718 // figure out which circles to draw 719 720 // + 1 so we pause on complete pattern 721 final int oneCycle = (count + 1) * MILLIS_PER_CIRCLE_ANIMATING; 722 final int spotInCycle = (int) (SystemClock.elapsedRealtime() - 723 mAnimatingPeriodStart) % oneCycle; 724 final int numCircles = spotInCycle / MILLIS_PER_CIRCLE_ANIMATING; 725 726 clearPatternDrawLookup(); 727 for (int i = 0; i < numCircles; i++) { 728 final Cell cell = pattern.get(i); 729 drawLookup[cell.getRow()][cell.getColumn()] = true; 730 } 731 732 // figure out in progress portion of ghosting line 733 734 final boolean needToUpdateInProgressPoint = numCircles > 0 735 && numCircles < count; 736 737 if (needToUpdateInProgressPoint) { 738 final float percentageOfNextCircle = 739 ((float) (spotInCycle % MILLIS_PER_CIRCLE_ANIMATING)) / 740 MILLIS_PER_CIRCLE_ANIMATING; 741 742 final Cell currentCell = pattern.get(numCircles - 1); 743 final float centerX = getCenterXForColumn(currentCell.column); 744 final float centerY = getCenterYForRow(currentCell.row); 745 746 final Cell nextCell = pattern.get(numCircles); 747 final float dx = percentageOfNextCircle * 748 (getCenterXForColumn(nextCell.column) - centerX); 749 final float dy = percentageOfNextCircle * 750 (getCenterYForRow(nextCell.row) - centerY); 751 mInProgressX = centerX + dx; 752 mInProgressY = centerY + dy; 753 } 754 // TODO: Infinite loop here... 755 invalidate(); 756 } 757 758 final float squareWidth = mSquareWidth; 759 final float squareHeight = mSquareHeight; 760 761 float radius = (squareWidth * mDiameterFactor * 0.5f); 762 mPathPaint.setStrokeWidth(radius); 763 764 final Path currentPath = mCurrentPath; 765 currentPath.rewind(); 766 767 // TODO: the path should be created and cached every time we hit-detect a cell 768 // only the last segment of the path should be computed here 769 // draw the path of the pattern (unless the user is in progress, and 770 // we are in stealth mode) 771 final boolean drawPath = (!mInStealthMode || mPatternDisplayMode == DisplayMode.Wrong); 772 if (drawPath) { 773 boolean anyCircles = false; 774 for (int i = 0; i < count; i++) { 775 Cell cell = pattern.get(i); 776 777 // only draw the part of the pattern stored in 778 // the lookup table (this is only different in the case 779 // of animation). 780 if (!drawLookup[cell.row][cell.column]) { 781 break; 782 } 783 anyCircles = true; 784 785 float centerX = getCenterXForColumn(cell.column); 786 float centerY = getCenterYForRow(cell.row); 787 if (i == 0) { 788 currentPath.moveTo(centerX, centerY); 789 } else { 790 currentPath.lineTo(centerX, centerY); 791 } 792 } 793 794 // add last in progress section 795 if ((mPatternInProgress || mPatternDisplayMode == DisplayMode.Animate) 796 && anyCircles) { 797 currentPath.lineTo(mInProgressX, mInProgressY); 798 } 799 canvas.drawPath(currentPath, mPathPaint); 800 } 801 802 // draw the circles 803 final int paddingTop = mPaddingTop; 804 final int paddingLeft = mPaddingLeft; 805 806 for (int i = 0; i < 3; i++) { 807 float topY = paddingTop + i * squareHeight; 808 //float centerY = mPaddingTop + i * mSquareHeight + (mSquareHeight / 2); 809 for (int j = 0; j < 3; j++) { 810 float leftX = paddingLeft + j * squareWidth; 811 drawCircle(canvas, (int) leftX, (int) topY, drawLookup[i][j]); 812 } 813 } 814 815 // draw the arrows associated with the path (unless the user is in progress, and 816 // we are in stealth mode) 817 boolean oldFlag = (mPaint.getFlags() & Paint.FILTER_BITMAP_FLAG) != 0; 818 mPaint.setFilterBitmap(true); // draw with higher quality since we render with transforms 819 if (drawPath) { 820 for (int i = 0; i < count - 1; i++) { 821 Cell cell = pattern.get(i); 822 Cell next = pattern.get(i + 1); 823 824 // only draw the part of the pattern stored in 825 // the lookup table (this is only different in the case 826 // of animation). 827 if (!drawLookup[next.row][next.column]) { 828 break; 829 } 830 831 float leftX = paddingLeft + cell.column * squareWidth; 832 float topY = paddingTop + cell.row * squareHeight; 833 834 drawArrow(canvas, leftX, topY, cell, next); 835 } 836 } 837 mPaint.setFilterBitmap(oldFlag); // restore default flag 838 } 839 840 private void drawArrow(Canvas canvas, float leftX, float topY, Cell start, Cell end) { 841 boolean green = mPatternDisplayMode != DisplayMode.Wrong; 842 843 final int endRow = end.row; 844 final int startRow = start.row; 845 final int endColumn = end.column; 846 final int startColumn = start.column; 847 848 // offsets for centering the bitmap in the cell 849 final int offsetX = ((int) mSquareWidth - mBitmapWidth) / 2; 850 final int offsetY = ((int) mSquareHeight - mBitmapHeight) / 2; 851 852 // compute transform to place arrow bitmaps at correct angle inside circle. 853 // This assumes that the arrow image is drawn at 12:00 with it's top edge 854 // coincident with the circle bitmap's top edge. 855 Bitmap arrow = green ? mBitmapArrowGreenUp : mBitmapArrowRedUp; 856 Matrix matrix = new Matrix(); 857 final int cellWidth = mBitmapCircleDefault.getWidth(); 858 final int cellHeight = mBitmapCircleDefault.getHeight(); 859 860 // the up arrow bitmap is at 12:00, so find the rotation from x axis and add 90 degrees. 861 final float theta = (float) Math.atan2( 862 (double) (endRow - startRow), (double) (endColumn - startColumn)); 863 final float angle = (float) Math.toDegrees(theta) + 90.0f; 864 865 // compose matrix 866 matrix.setTranslate(leftX + offsetX, topY + offsetY); // transform to cell position 867 matrix.preRotate(angle, cellWidth / 2.0f, cellHeight / 2.0f); // rotate about cell center 868 matrix.preTranslate((cellWidth - arrow.getWidth()) / 2.0f, 0.0f); // translate to 12:00 pos 869 canvas.drawBitmap(arrow, matrix, mPaint); 870 } 871 872 /** 873 * @param canvas 874 * @param leftX 875 * @param topY 876 * @param partOfPattern Whether this circle is part of the pattern. 877 */ 878 private void drawCircle(Canvas canvas, int leftX, int topY, boolean partOfPattern) { 879 Bitmap outerCircle; 880 Bitmap innerCircle; 881 882 if (!partOfPattern || (mInStealthMode && mPatternDisplayMode != DisplayMode.Wrong)) { 883 // unselected circle 884 outerCircle = mBitmapCircleDefault; 885 innerCircle = mBitmapBtnDefault; 886 } else if (mPatternInProgress) { 887 // user is in middle of drawing a pattern 888 outerCircle = mBitmapCircleGreen; 889 innerCircle = mBitmapBtnTouched; 890 } else if (mPatternDisplayMode == DisplayMode.Wrong) { 891 // the pattern is wrong 892 outerCircle = mBitmapCircleRed; 893 innerCircle = mBitmapBtnDefault; 894 } else if (mPatternDisplayMode == DisplayMode.Correct || 895 mPatternDisplayMode == DisplayMode.Animate) { 896 // the pattern is correct 897 outerCircle = mBitmapCircleGreen; 898 innerCircle = mBitmapBtnDefault; 899 } else { 900 throw new IllegalStateException("unknown display mode " + mPatternDisplayMode); 901 } 902 903 final int width = mBitmapWidth; 904 final int height = mBitmapHeight; 905 906 final float squareWidth = mSquareWidth; 907 final float squareHeight = mSquareHeight; 908 909 int offsetX = (int) ((squareWidth - width) / 2f); 910 int offsetY = (int) ((squareHeight - height) / 2f); 911 912 canvas.drawBitmap(outerCircle, leftX + offsetX, topY + offsetY, mPaint); 913 canvas.drawBitmap(innerCircle, leftX + offsetX, topY + offsetY, mPaint); 914 } 915 916 @Override 917 protected Parcelable onSaveInstanceState() { 918 Parcelable superState = super.onSaveInstanceState(); 919 return new SavedState(superState, 920 LockPatternUtils.patternToString(mPattern), 921 mPatternDisplayMode.ordinal(), 922 mInputEnabled, mInStealthMode, mTactileFeedbackEnabled); 923 } 924 925 @Override 926 protected void onRestoreInstanceState(Parcelable state) { 927 final SavedState ss = (SavedState) state; 928 super.onRestoreInstanceState(ss.getSuperState()); 929 setPattern( 930 DisplayMode.Correct, 931 LockPatternUtils.stringToPattern(ss.getSerializedPattern())); 932 mPatternDisplayMode = DisplayMode.values()[ss.getDisplayMode()]; 933 mInputEnabled = ss.isInputEnabled(); 934 mInStealthMode = ss.isInStealthMode(); 935 mTactileFeedbackEnabled = ss.isTactileFeedbackEnabled(); 936 } 937 938 /** 939 * The parecelable for saving and restoring a lock pattern view. 940 */ 941 private static class SavedState extends BaseSavedState { 942 943 private final String mSerializedPattern; 944 private final int mDisplayMode; 945 private final boolean mInputEnabled; 946 private final boolean mInStealthMode; 947 private final boolean mTactileFeedbackEnabled; 948 949 /** 950 * Constructor called from {@link LockPatternView#onSaveInstanceState()} 951 */ 952 private SavedState(Parcelable superState, String serializedPattern, int displayMode, 953 boolean inputEnabled, boolean inStealthMode, boolean tactileFeedbackEnabled) { 954 super(superState); 955 mSerializedPattern = serializedPattern; 956 mDisplayMode = displayMode; 957 mInputEnabled = inputEnabled; 958 mInStealthMode = inStealthMode; 959 mTactileFeedbackEnabled = tactileFeedbackEnabled; 960 } 961 962 /** 963 * Constructor called from {@link #CREATOR} 964 */ 965 private SavedState(Parcel in) { 966 super(in); 967 mSerializedPattern = in.readString(); 968 mDisplayMode = in.readInt(); 969 mInputEnabled = (Boolean) in.readValue(null); 970 mInStealthMode = (Boolean) in.readValue(null); 971 mTactileFeedbackEnabled = (Boolean) in.readValue(null); 972 } 973 974 public String getSerializedPattern() { 975 return mSerializedPattern; 976 } 977 978 public int getDisplayMode() { 979 return mDisplayMode; 980 } 981 982 public boolean isInputEnabled() { 983 return mInputEnabled; 984 } 985 986 public boolean isInStealthMode() { 987 return mInStealthMode; 988 } 989 990 public boolean isTactileFeedbackEnabled(){ 991 return mTactileFeedbackEnabled; 992 } 993 994 @Override 995 public void writeToParcel(Parcel dest, int flags) { 996 super.writeToParcel(dest, flags); 997 dest.writeString(mSerializedPattern); 998 dest.writeInt(mDisplayMode); 999 dest.writeValue(mInputEnabled); 1000 dest.writeValue(mInStealthMode); 1001 dest.writeValue(mTactileFeedbackEnabled); 1002 } 1003 1004 public static final Parcelable.Creator<SavedState> CREATOR = 1005 new Creator<SavedState>() { 1006 public SavedState createFromParcel(Parcel in) { 1007 return new SavedState(in); 1008 } 1009 1010 public SavedState[] newArray(int size) { 1011 return new SavedState[size]; 1012 } 1013 }; 1014 } 1015} 1016