private double CalculateOffset(MilepostInfo mpi, double interval)
{
if (mpi.FirstMilepost == 0)
{
return(0);
}
double distance = Math.Abs(mpi.FirstMilepost - mpi.LeftMilepost);
return(distance * interval);
}
private void TrackMouseMove(object sender, System.Windows.Input.MouseEventArgs e)
{
// Get mouse position
var pos = e.GetPosition(Canvas);
// Calculate ratio
var grTrkLength = (float)Utility.CalculateDistance(
TrackComponent.LX, TrackComponent.LY,
TrackComponent.RX, TrackComponent.RY);
var grDistanceToMouse = (float)Utility.CalculateDistance(
pos.X, pos.Y, TrackComponent.LX, TrackComponent.LY);
var ratio = grDistanceToMouse / grTrkLength;
// Get Miles.
MilepostInfo mpi = DetermineMilepostSequence(TrackComponent.LeftLimitMPRange, TrackComponent.RightLimitMPRange);
var trackLengthInMiles = Math.Abs(mpi.RightMilepost - mpi.LeftMilepost);
MouseMiles = mpi.LeftMilepost + mpi.IncrementAmount * ratio * trackLengthInMiles;
}
private void DrawMileLines()
{
MilepostInfo mpi = DetermineMilepostSequence(TrackComponent.LeftLimitMPRange, TrackComponent.RightLimitMPRange);
var interval = CalculateInterval(mpi, _rect.Width);
if (interval <= 0 || double.IsInfinity(interval))
{
return;
}
var offset = CalculateOffset(mpi, interval);
if (offset + interval >= _rect.Width)
{
return;
}
int mp = mpi.FirstMilepost;
for (Double x = offset; x < _rect.Width + offset; x += interval)
{
Line ln = new Line()
{
Stroke = System.Windows.Media.Brushes.Blue,
StrokeThickness = 1,
X1 = x + TrackComponent.LX,
X2 = x + TrackComponent.LX,
Y1 = TrackComponent.LY,
Y2 = TrackComponent.LY + _rect.Height,
HorizontalAlignment = HorizontalAlignment.Left,
VerticalAlignment = VerticalAlignment.Center,
ToolTip = mp.ToString("d")
};
Canvas.Children.Add(ln);
mp += mpi.IncrementAmount;
}
}
private double CalculateInterval(MilepostInfo mpi, double graphicTrackLength)
{
double lm = Math.Abs(mpi.LeftMilepost - mpi.RightMilepost);
return(graphicTrackLength / lm);
}
