// helper method to find which cell a point maps to
private Cell checkForNewHit(float x, float y) {
final int rowHit = getRowHit(y);
if (rowHit < 0) {
return null;
}
final int columnHit = getColumnHit(x);
if (columnHit < 0) {
return null;
}
if (cellManager.isDrawn(rowHit, columnHit)) {
return null;
}
return cellManager.get(rowHit, columnHit);
}
/**
* 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;
}
@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
}