setCellSelection method
Implementation
void setCellSelection(Offset pos1, Offset pos2) {
final x1 = min(pos1.dx, pos2.dx);
final x2 = max(pos1.dx, pos2.dx);
final column1 =
binarySearch(columnOffsets, x1, 0, columnOffsets.length - 1);
final column2 =
binarySearch(columnOffsets, x2, 0, columnOffsets.length - 1);
final y1 = min(pos1.dy, pos2.dy);
final y2 = max(pos1.dy, pos2.dy);
final row1 = binarySearch(rowOffsets, y1, 0, rowOffsets.length - 1);
final row2 = binarySearch(rowOffsets, y2, 0, rowOffsets.length - 1);
clear();
for (int i = row1; i <= row2; i++) {
for (int j = column1; j <= column2; j++) {
addCellSelection(Index(i, j));
}
}
}