Calibrate Method

WinRT C#
WinRT JavaScript

public void Calibrate( 
   LeadLengthD sourceLength,
   AnnUnit sourceUnit,
   LeadLengthD destinationLength,
   AnnUnit destinationUnit
)

 function Leadtools.Annotations.Core.AnnContainerMapper.Calibrate( 
   sourceLength ,
   sourceUnit ,
   destinationLength ,
   destinationUnit 
)

Parameters

sourceLength: Known source length value
sourceUnit: Units of sourceLength
destinationLength: What the destination length must be
destinationUnit: Units of destinationUnit

This method will use the parameters to calculate a new value for CalibrationScale. This value is used afterwards by all the existing ruler and new ruler objects created in this container.

Calibrating a ruler means assigning a specific length to it. For example, on a digital X-ray of a hand, you may draw an annotation ruler object along one of the fingers. You know that this distance is supposed to be exactly 6.5 cm. Using the new calibration functionality you can calibrate this ruler, all existing rulers, and all newly created rulers so that they would precisely measure this distance to be 6.5 cm. This is accomplished by first drawing a ruler on the container till it matches exactly the length of the finger - ignoring the values shown - then using Calibrate as shown in the example.

Visual Basic
C#
WinRT C#
WinRT JavaScript
Silverlight C#
Silverlight VB

[TestMethod]
public void AnnContainerMapper_Calibrate()
{
   // Add a ruler with a length of 1 inch to the container
   AnnContainer container = _automation.Container;
   double inch = 720;
   AnnPolyRulerObject rulerObj = new AnnPolyRulerObject();
   rulerObj.Points.Add(LeadPointDHelper.Create(1 * inch, 1 * inch));
   rulerObj.Points.Add(LeadPointDHelper.Create(2 * inch, 1 * inch));
   rulerObj.Stroke = AnnStroke.Create(AnnSolidColorBrush.Create("Red"), LeadLengthDHelper.Create(1));
   rulerObj.ShowGauge = true;
   rulerObj.ShowTickMarks = true;
   rulerObj.MeasurementUnit = AnnUnit.Inch;
   container.Children.Add(rulerObj);
   // Show the ruler
   _automation.Invalidate(LeadRectDHelper.Empty);
   Debug.WriteLine("Ruler to calibrate, length is 1 inch");

   // Get the length of the ruler
   LeadPointD point1 = rulerObj.Points[0];
   LeadPointD point2 = rulerObj.Points[1];
   double length = Math.Sqrt(Math.Pow(Math.Abs(point2.X - point1.X), 2) + Math.Pow(Math.Abs(point2.Y - point1.Y), 2));

   // Calibrate the container mapper
   container.Mapper.Calibrate(
      LeadLengthDHelper.Create(length),   // Source length
      AnnUnit.Unit,                       // Source unit (container units)
      LeadLengthDHelper.Create(6.5),      // Destination length
      AnnUnit.Centimeter);                // Destination unit 

   // Use the Centimeters as the measurement unit in the ruler
   rulerObj.MeasurementUnit = AnnUnit.Centimeter;

   // Now rulerObj should show 6.5 Centimeter as its length
   _automation.Invalidate(LeadRectDHelper.Empty);
   Debug.WriteLine("Calibrated, length is 6.5 cm");
}

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference

AnnContainerMapper Class
AnnContainerMapper Members