/// <summary>
/// Function to compute the denominator of the viewport's scale when using a given <paramref name="dpi"/> resolution.
/// </summary>
/// <param name="dpi">The resolution</param>
/// <returns>The scale's denominator</returns>
public double GetMapScale(int dpi)
{
// Why lock?
lock (_lockMapScale)
{
if (_lastDpi != dpi)
{
_mapScale = ScaleCalculations.CalculateScaleNonLatLong(Envelope.Width, Size.Width, 1, dpi);
_lastDpi = dpi;
}
return(_mapScale);
}
}
/// <summary>
/// Function to compute the denominator of the viewport's scale when using a given <paramref name="dpi"/> resolution.
/// </summary>
/// <param name="dpi">The resolution</param>
/// <returns>The scale's denominator</returns>
public double GetMapScale(int dpi)
{
if (_lastDpi != dpi)
{
lock (_lockMapScale)
if (_lastDpi != dpi)
{
_mapScale = ScaleCalculations.CalculateScaleNonLatLong(Zoom, Size.Width, 1, dpi);
_lastDpi = dpi;
}
}
return(_mapScale);
}
/// <summary>
/// Calculate the scale and store it in <see cref="_scale"/>.
/// <para>
/// It should be called to calculate the real map scale everytime the user change mapunit or set the scale
/// </para>
/// </summary>
private void CalcScale(int dpi)
{
double fScale;
if (_mapUnit == (int)Unit.Degree) //LatLong
{
fScale = ScaleCalculations.CalculateScaleLatLong(_lon1, _lon2, _lat, _pageWidth, dpi);
}
else
{
fScale = ScaleCalculations.CalculateScaleNonLatLong(_mapWidth, _pageWidth, _mapUnitFactor, dpi);
}
_scale = fScale;
}
public double GetMapScale(int dpi)
{
return(ScaleCalculations.CalculateScaleNonLatLong(Envelope.Width, Size.Width, 1, dpi));
}