private static long SpeedSelector(ScreenUnit screenUnit)
{
if (screenUnit.MouseFinishedCount == 0)
{
return(0);
}
return((long)Math.Pow(screenUnit.SpeedCount / screenUnit.MouseFinishedCount, 0.5));
}
/// <summary>
/// Convert a value from a screen unit to another one (ex: 1cm => 37.7953px)
/// </summary>
/// <param name="from">Start unit</param>
/// <param name="to">End unit</param>
/// <param name="value">The value to convert (using start unit)</param>
/// <returns>Returns the result of the conversion</returns>
public static float Convert(ScreenUnit from, ScreenUnit to, float value)
{
if (from == to)
{
return(value);
}
switch (from)
{
case ScreenUnit.Pixel:
if (to == ScreenUnit.Centimeter)
{
return(value / PixelToCentimeterRatio);
}
if (to == ScreenUnit.Inch)
{
return(value / PixelToInchRatio);
}
if (to == ScreenUnit.EffectivePixel)
{
return(value / (float)DisplayInformation.GetForCurrentView().RawPixelsPerViewPixel);
}
throw new ArgumentOutOfRangeException(nameof(to));
case ScreenUnit.Centimeter:
if (to == ScreenUnit.Pixel)
{
return(value * PixelToCentimeterRatio);
}
if (to == ScreenUnit.Inch)
{
return(value / CentimeterToInchRatio);
}
throw new ArgumentOutOfRangeException(nameof(to));
case ScreenUnit.Inch:
if (to == ScreenUnit.Pixel)
{
return(value * PixelToInchRatio);
}
if (to == ScreenUnit.Centimeter)
{
return(value * CentimeterToInchRatio);
}
throw new ArgumentOutOfRangeException(nameof(to));
case ScreenUnit.EffectivePixel:
if (to == ScreenUnit.Pixel)
{
return(value * (float)DisplayInformation.GetForCurrentView().RawPixelsPerViewPixel);
}
throw new ArgumentOutOfRangeException(nameof(to));
default:
throw new ArgumentOutOfRangeException(nameof(from));
}
}
private static long MousePassedSelector(ScreenUnit screenUnit) => (long)Math.Pow(screenUnit.MousePassedCount, 0.5);
/// <summary>
/// Converts a screen unit to another screen unit (ex: 1cm => 37.7953px).
/// </summary>
/// <param name="from">Start unit</param>
/// <param name="to">End unit</param>
/// <param name="value">The value to convert (using start unit)</param>
/// <param name="xamlRoot">The XamlRoot that will be used to get the screen scale. Required on Xaml Islands.</param>
/// <returns>The result of the conversion</returns>
public static float Convert(ScreenUnit from, ScreenUnit to, float value, XamlRoot xamlRoot = null)
{
if (from == to)
{
return(value);
}
switch (from)
{
case ScreenUnit.Pixel:
if (to == ScreenUnit.Centimeter)
{
return(value / PixelToCentimeterRatio);
}
if (to == ScreenUnit.Inch)
{
return(value / PixelToInchRatio);
}
if (to == ScreenUnit.EffectivePixel)
{
return(value / GetScale(xamlRoot));
}
throw new ArgumentOutOfRangeException(nameof(to));
case ScreenUnit.Centimeter:
if (to == ScreenUnit.Pixel)
{
return(value * PixelToCentimeterRatio);
}
if (to == ScreenUnit.Inch)
{
return(value / CentimeterToInchRatio);
}
throw new ArgumentOutOfRangeException(nameof(to));
case ScreenUnit.Inch:
if (to == ScreenUnit.Pixel)
{
return(value * PixelToInchRatio);
}
if (to == ScreenUnit.Centimeter)
{
return(value * CentimeterToInchRatio);
}
throw new ArgumentOutOfRangeException(nameof(to));
case ScreenUnit.EffectivePixel:
if (to == ScreenUnit.Pixel)
{
return(value * GetScale(xamlRoot));
}
throw new ArgumentOutOfRangeException(nameof(to));
default:
throw new ArgumentOutOfRangeException(nameof(from));
}
}
