private static float GetDisplayedWidth(IPresentationImage presentationImage, RectangleF referenceDisplayedRectangle)
{
IImageSpatialTransform transform = GetImageTransform(presentationImage);
Frame frame = GetFrame(presentationImage);
//Convert the displayed width to source dimensions
SizeF sourceSize = transform.ConvertToSource(new SizeF(referenceDisplayedRectangle.Width, 0));
float x = Math.Abs(sourceSize.Width);
float y = Math.Abs(sourceSize.Height);
//The displayed width is the magnitude of the line in source coordinates,
//but one of xLength or yLength will always be zero, so we can optimize.
if (x > y)
{
return(x * (float)frame.NormalizedPixelSpacing.Column);
}
return(y * (float)frame.NormalizedPixelSpacing.Row);
}
public override string GetAnnotationText(IPresentationImage presentationImage)
{
if (presentationImage == null)
{
return(String.Empty);
}
IImageSopProvider imageSopProvider = presentationImage as IImageSopProvider;
if (imageSopProvider == null)
{
return(String.Empty);
}
ISpatialTransformProvider spatialTransformProvider = presentationImage as ISpatialTransformProvider;
if (spatialTransformProvider == null)
{
return(String.Empty);
}
// 2D DFOV value doesn't make a lot of sense when the "image" is 3D, so we're blanking it out until we define what DFOV means in this context
if (presentationImage is ISpatialTransform3DProvider)
{
return(String.Empty);
}
IImageSpatialTransform transform = spatialTransformProvider.SpatialTransform as IImageSpatialTransform;
if (transform == null)
{
return(String.Empty);
}
if (transform.RotationXY % 90 != 0)
{
return(SR.ValueNotApplicable);
}
Frame frame = imageSopProvider.Frame;
PixelSpacing normalizedPixelSpacing = frame.NormalizedPixelSpacing;
if (normalizedPixelSpacing.IsNull)
{
return(String.Empty);
}
RectangleF sourceRectangle = new RectangleF(0, 0, frame.Columns, frame.Rows);
RectangleF destinationRectangle = transform.ConvertToDestination(sourceRectangle);
destinationRectangle = RectangleUtilities.Intersect(destinationRectangle, presentationImage.ClientRectangle);
//Convert the displayed width and height to source dimensions
SizeF widthInSource = transform.ConvertToSource(new SizeF(destinationRectangle.Width, 0));
SizeF heightInSource = transform.ConvertToSource(new SizeF(0, destinationRectangle.Height));
//The displayed FOV is given by the magnitude of each line in source coordinates, but
//for each of the 2 lines, one of x or y will be zero, so we can optimize.
float x1 = Math.Abs(widthInSource.Width);
float y1 = Math.Abs(widthInSource.Height);
float x2 = Math.Abs(heightInSource.Width);
float y2 = Math.Abs(heightInSource.Height);
double displayedFieldOfViewX, displayedFieldOfViewY;
if (x1 > y1) //the image is not rotated
{
displayedFieldOfViewX = x1 * normalizedPixelSpacing.Column / 10;
displayedFieldOfViewY = y2 * normalizedPixelSpacing.Row / 10;
}
else //the image is rotated by 90 or 270 degrees
{
displayedFieldOfViewX = x2 * normalizedPixelSpacing.Column / 10;
displayedFieldOfViewY = y1 * normalizedPixelSpacing.Row / 10;
}
return(String.Format(SR.FormatCentimeters, String.Format(SR.Format2Dimensions, displayedFieldOfViewX.ToString("F1"), displayedFieldOfViewY.ToString("F1"))));
}