/// <summary>
/// Calculates the required length and value of the scalebar
/// </summary>
/// <param name="unitAdapter">
/// the DistanceUnitAdapter to calculate for </param>
/// <returns> a <seealso cref="ScaleBarLengthAndValue"/> object containing the required scaleBarLength and scaleBarValue </returns>
protected internal virtual ScaleBarLengthAndValue CalculateScaleBarLengthAndValue(DistanceUnitAdapter unitAdapter)
{
this.prevMapPosition = this.mapViewPosition.MapPosition;
double groundResolution = MercatorProjection.CalculateGroundResolution(this.prevMapPosition.LatLong.Latitude, MercatorProjection.GetMapSize(this.prevMapPosition.ZoomLevel, this.displayModel.TileSize));
groundResolution = groundResolution / unitAdapter.MeterRatio;
int[] scaleBarValues = unitAdapter.ScaleBarValues;
int scaleBarLength = 0;
int mapScaleValue = 0;
for (int i = 0; i < scaleBarValues.Length; ++i)
{
mapScaleValue = scaleBarValues[i];
scaleBarLength = (int)(mapScaleValue / groundResolution);
if (scaleBarLength < (this.mapScaleBitmap.Width - 10))
{
break;
}
}
return(new ScaleBarLengthAndValue(scaleBarLength, mapScaleValue));
}
