public static double ConvertSizeRectDpiToSystemDpi(Rect rect, double size)
{
Dpi systemDpi = GetSystemDpi();
Dpi rectDpi = DpiChecker.GetDpiFromRect(rect);
return(size * systemDpi.X / rectDpi.X);
}
/// <summary>
/// Gets a ScaleTransform used to manually scale elements to be the correct size on monitors with non-system DPI. The Rect passed in is used to find the monitor DPI that the rect is on. The Rect should be the WPF System-DPI coordinates.
/// </summary>
/// <param name="rect">WPF System-DPI coordinates</param>
/// <returns>ScaleTransform with a scale factor that is Monitor DPI / System DPI</returns>
public static ScaleTransform GetScaleTransformForRect(Rect rect)
{
double monitorScaleFactorX = (double)DpiChecker.GetDpiFromRect(rect).X / (double)DpiUtil.GetSystemDpi().X;
double monitorScaleFactorY = (double)DpiChecker.GetDpiFromRect(rect).Y / (double)DpiUtil.GetSystemDpi().Y;
ScaleTransform scaleTransform = new ScaleTransform(monitorScaleFactorX, monitorScaleFactorY);
return(scaleTransform);
}
public static double GetAbsoluteScaleFactorFromRect(Rect rect)
{
double scaleFactor = (double)DpiChecker.GetDpiFromRect(rect).X / (double)Dpi.Default.X;
return(scaleFactor);
}