private void OnTimerElapsed()

in src/MiddleClickScroll/MiddleClickScroll.cs [159:222]
56 lines of code
8 McCabe index (conditional complexity)

        private void OnTimerElapsed(object sender, EventArgs e)
        {
            if ((!_view.IsClosed) && (_view.VisualElement.IsVisible) && _location.HasValue)
            {
                DateTime now = DateTime.Now;

                Point currentPosition = _view.VisualElement.PointToScreen(Mouse.GetPosition(_view.VisualElement));

                var delta = currentPosition - _location.Value;

                double absDeltaX = Math.Abs(delta.X);
                double absDeltaY = Math.Abs(delta.Y);

                double maxDelta = Math.Max(absDeltaX, absDeltaY);
                if (maxDelta > minMove)
                {
                    _dismissOnMouseUp = true;

                    double deltaT = (now - _lastMoveTime).TotalMilliseconds;
                    double pixels = (maxDelta - minMove) * deltaT / moveDivisor;

                    if (absDeltaX > absDeltaY)
                    {
                        if (delta.X > 0.0)
                        {
                            _view.ViewportLeft += pixels;
                            _view.VisualElement.Cursor = Cursors.ScrollE;
                        }
                        else
                        {
                            _view.ViewportLeft -= pixels;
                            _view.VisualElement.Cursor = Cursors.ScrollW;
                        }
                    }
                    else
                    {
                        ITextViewLine top = _view.TextViewLines[0];
                        double newOffset = top.Top - _view.ViewportTop;
                        if (delta.Y > 0.0)
                        {
                            newOffset = (newOffset - pixels);
                            _view.VisualElement.Cursor = Cursors.ScrollS;
                        }
                        else
                        {
                            newOffset = (newOffset + pixels);
                            _view.VisualElement.Cursor = Cursors.ScrollN;
                        }

                        _view.DisplayTextLineContainingBufferPosition(top.Start, newOffset, ViewRelativePosition.Top);
                    }
                }
                else
                {
                    _view.VisualElement.Cursor = Cursors.ScrollAll;
                }

                _lastMoveTime = now;
            }
            else
            {
                this.StopScrolling();
            }
        }