/**
* Determines whether the point x, y will add a new point to the current pattern (in addition to
* finding the cell, also makes heuristic choices such as filling in gaps based on current
* pattern).
*
* @param x The x coordinate.
* @param y The y coordinate.
*/
private Cell detectAndAddHit(float x, float y) {
final Cell cell = checkForNewHit(x, y);
if (cell != null) {
// check for gaps in existing pattern
// Cell fillInGapCelal = null;
final ArrayList<Cell> newCells = new ArrayList<>();
if (!mPattern.isEmpty()) {
final Cell lastCell = mPattern.get(mPattern.size() - 1);
int dRow = cell.getRow() - lastCell.getRow();
int dCol = cell.getColumn() - lastCell.getColumn();
int rsign = dRow > 0 ? 1 : -1;
int csign = dCol > 0 ? 1 : -1;
if (dRow == 0) {
for (int i = 1; i < Math.abs(dCol); i++) {
newCells.add(new Cell(lastCell.getRow(), lastCell.getColumn() + i * csign));
}
} else if (dCol == 0) {
for (int i = 1; i < Math.abs(dRow); i++) {
newCells.add(new Cell(lastCell.getRow() + i * rsign, lastCell.getColumn()));
}
} else if (Math.abs(dCol) == Math.abs(dRow)) {
for (int i = 1; i < Math.abs(dRow); i++) {
newCells.add(new Cell(lastCell.getRow() + i * rsign, lastCell.getColumn() + i * csign));
}
}
}
for (Cell fillInGapCell : newCells) {
if (fillInGapCell != null && !cellManager.isDrawn(fillInGapCell)) {
addCellToPattern(fillInGapCell);
}
}
addCellToPattern(cell);
if (enableHapticFeedback) {
performHapticFeedback(
HapticFeedbackConstants.VIRTUAL_KEY,
HapticFeedbackConstants.FLAG_IGNORE_VIEW_SETTING
| HapticFeedbackConstants.FLAG_IGNORE_GLOBAL_SETTING);
}
return cell;
}
return null;
}
/**
* Set the display mode of the current pattern. This can be useful, for instance, after detecting
* a pattern to tell this view whether change the in progress result to correct or wrong.
*
* @param displayMode The display mode.
*/
public void setDisplayMode(final DisplayMode displayMode) {
patternDisplayMode = displayMode;
if (displayMode == DisplayMode.Animate) {
if (mPattern.size() == 0) {
throw new IllegalStateException(
"you must have a pattern to "
+ "animate if you want to set the display mode to animate");
}
animatingPeriodStart = SystemClock.elapsedRealtime();
final Cell first = mPattern.get(0);
inProgressX = getCenterXForColumn(first.getColumn());
inProgressY = getCenterYForRow(first.getRow());
clearPatternDrawLookup();
}
invalidate();
}
private void handleActionDown(MotionEvent event) {
resetPattern();
final float x = event.getX();
final float y = event.getY();
final Cell hitCell = detectAndAddHit(x, y);
if (hitCell != null) {
patternInProgress = true;
patternDisplayMode = DisplayMode.Correct;
notifyPatternStarted();
} else {
/*
* Original source check for patternInProgress == true first before
* calling this block. But if we do that, there will be nothing
* happened when the user taps at empty area and releases the
* finger. We want the pattern to be reset and the message will be
* updated after the user did that.
*/
patternInProgress = false;
notifyPatternCleared();
}
if (hitCell != null) {
final float startX = getCenterXForColumn(hitCell.getColumn());
final float startY = getCenterYForRow(hitCell.getRow());
final float widthOffset = squareWidth / 2f;
final float heightOffset = squareHeight / 2f;
invalidate(
(int) (startX - widthOffset),
(int) (startY - heightOffset),
(int) (startX + widthOffset),
(int) (startY + heightOffset));
}
inProgressX = x;
inProgressY = y;
if (PROFILE_DRAWING) {
if (!drawingProfilingStarted) {
Debug.startMethodTracing("LockPatternDrawing");
drawingProfilingStarted = true;
}
}
}
@Override
protected void onDraw(Canvas canvas) {
final ArrayList<Cell> pattern = mPattern;
final int count = pattern.size();
if (patternDisplayMode == DisplayMode.Animate) {
final int oneCycle = (count + 1) * MILLIS_PER_CIRCLE_ANIMATING;
final int spotInCycle =
(int) (SystemClock.elapsedRealtime() - animatingPeriodStart) % oneCycle;
final int numCircles = spotInCycle / MILLIS_PER_CIRCLE_ANIMATING;
clearPatternDrawLookup();
for (int i = 0; i < numCircles; i++) {
final Cell cell = pattern.get(i);
cellManager.draw(cell, true);
}
final boolean needToUpdateInProgressPoint = numCircles > 0 && numCircles < count;
if (needToUpdateInProgressPoint) {
final float percentageOfNextCircle =
((float) (spotInCycle % MILLIS_PER_CIRCLE_ANIMATING)) / MILLIS_PER_CIRCLE_ANIMATING;
final Cell currentCell = pattern.get(numCircles - 1);
final float centerX = getCenterXForColumn(currentCell.getColumn());
final float centerY = getCenterYForRow(currentCell.getRow());
final Cell nextCell = pattern.get(numCircles);
final float dx =
percentageOfNextCircle * (getCenterXForColumn(nextCell.getColumn()) - centerX);
final float dy = percentageOfNextCircle * (getCenterYForRow(nextCell.getRow()) - centerY);
inProgressX = centerX + dx;
inProgressY = centerY + dy;
}
invalidate();
}
final float squareWidth = this.squareWidth;
final float squareHeight = this.squareHeight;
float radius = (squareWidth * diameterFactor * 0.5f);
pathPaint.setStrokeWidth(radius);
final Path currentPath = this.currentPath;
currentPath.rewind();
// draw the circles
final int paddingTop = this.paddingTop;
final int paddingLeft = this.paddingLeft;
for (int i = 0; i < gridSize; i++) {
float topY = paddingTop + i * squareHeight;
for (int j = 0; j < gridSize; j++) {
float leftX = paddingLeft + j * squareWidth;
drawCircle(canvas, (int) leftX, (int) topY, cellManager.isDrawn(i, j));
}
}
// only the last segment of the path should be computed here
// draw the path of the pattern (unless the user is in progress, and
// we are in stealth mode)
final boolean drawPath =
(!inStealthMode && patternDisplayMode == DisplayMode.Correct
|| !inErrorStealthMode && patternDisplayMode == DisplayMode.Wrong);
// draw the arrows associated with the path (unless the user is in
// progress, and
// we are in stealth mode)
boolean oldFlag = (circlePaint.getFlags() & Paint.FILTER_BITMAP_FLAG) != 0;
circlePaint.setFilterBitmap(true);
if (drawPath) {
boolean anyCircles = false;
for (int i = 0; i < count; i++) {
Cell cell = pattern.get(i);
// only draw the part of the pattern stored in
// the lookup table (this is only different in the case
// of animation).
if (!cellManager.isDrawn(cell)) {
break;
}
anyCircles = true;
float centerX = getCenterXForColumn(cell.getColumn());
float centerY = getCenterYForRow(cell.getRow());
if (i == 0) {
currentPath.moveTo(centerX, centerY);
} else {
currentPath.lineTo(centerX, centerY);
}
}
// add last in progress section
if ((patternInProgress || patternDisplayMode == DisplayMode.Animate)
&& anyCircles
&& count > 1) {
currentPath.lineTo(inProgressX, inProgressY);
}
canvas.drawPath(currentPath, pathPaint);
}
circlePaint.setFilterBitmap(oldFlag); // restore default flag
}
private void handleActionMove(MotionEvent event) {
// Handle all recent motion events so we don't skip any cells even when
// the device
// is busy...
final int historySize = event.getHistorySize();
for (int i = 0; i < historySize + 1; i++) {
final float x = i < historySize ? event.getHistoricalX(i) : event.getX();
final float y = i < historySize ? event.getHistoricalY(i) : event.getY();
final int patternSizePreHitDetect = mPattern.size();
Cell hitCell = detectAndAddHit(x, y);
final int patternSize = mPattern.size();
if (hitCell != null && patternSize == 1) {
patternInProgress = true;
notifyPatternStarted();
}
// note current x and y for rubber banding of in progress patterns
final float dx = Math.abs(x - inProgressX);
final float dy = Math.abs(y - inProgressY);
if (dx + dy > squareWidth * 0.01f) {
float oldX = inProgressX;
float oldY = inProgressY;
inProgressX = x;
inProgressY = y;
if (patternInProgress && patternSize > 0) {
final ArrayList<Cell> pattern = mPattern;
final float radius = squareWidth * diameterFactor * 0.5f;
final Cell lastCell = pattern.get(patternSize - 1);
float startX = getCenterXForColumn(lastCell.getColumn());
float startY = getCenterYForRow(lastCell.getRow());
float left;
float top;
float right;
float bottom;
final Rect invalidateRect = invalidate;
if (startX < x) {
left = startX;
right = x;
} else {
left = x;
right = startX;
}
if (startY < y) {
top = startY;
bottom = y;
} else {
top = y;
bottom = startY;
}
// Invalidate between the pattern's last cell and the
// current location
invalidateRect.set(
(int) (left - radius),
(int) (top - radius),
(int) (right + radius),
(int) (bottom + radius));
if (startX < oldX) {
left = startX;
right = oldX;
} else {
left = oldX;
right = startX;
}
if (startY < oldY) {
top = startY;
bottom = oldY;
} else {
top = oldY;
bottom = startY;
}
// Invalidate between the pattern's last cell and the
// previous location
invalidateRect.union(
(int) (left - radius),
(int) (top - radius),
(int) (right + radius),
(int) (bottom + radius));
// Invalidate between the pattern's new cell and the
// pattern's previous cell
if (hitCell != null) {
startX = getCenterXForColumn(hitCell.getColumn());
startY = getCenterYForRow(hitCell.getRow());
if (patternSize >= 2) {
// (re-using hitcell for old cell)
hitCell = pattern.get(patternSize - 1 - (patternSize - patternSizePreHitDetect));
oldX = getCenterXForColumn(hitCell.getColumn());
oldY = getCenterYForRow(hitCell.getRow());
if (startX < oldX) {
left = startX;
right = oldX;
} else {
left = oldX;
right = startX;
}
if (startY < oldY) {
top = startY;
bottom = oldY;
} else {
top = oldY;
bottom = startY;
}
} else {
left = right = startX;
top = bottom = startY;
}
final float widthOffset = squareWidth / 2f;
final float heightOffset = squareHeight / 2f;
invalidateRect.set(
(int) (left - widthOffset),
(int) (top - heightOffset),
(int) (right + widthOffset),
(int) (bottom + heightOffset));
}
invalidate(invalidateRect);
} else {
invalidate();
}
}
}
invalidate();
}