startDraw method

void startDraw(
  1. Offset startPoint
)

Starts a new drawing stroke at the given startPoint.

Implementation

void startDraw(Offset startPoint) {
  _history.putIfAbsent(_currentPage, () => []);
  _undoStack.putIfAbsent(_currentPage, () => []);
  _history[_currentPage]!.add(SimpleLine(startPoint, _currentColor));
  notifyListeners();
}