LImageViewerCell::CalibrateRuler

#include "ltwrappr.h"

L_INT LImageViewerCell::CalibrateRuler(nSubCellIndex, dLength, uUnit, uFlags)

Calibrates the selected ruler inside the specific cell or sub-cell.

Parameters

L_INT nSubCellIndex

A zero-based index of the image list attached to the cell. This image contains the ruler annotation object that the user chooses to calibrate. Pass -1 to apply this effect on all sub-cells. Pass -2 to apply this effect on the selected sub-cell.

L_DOUBLE dLength

Value that represents the length to be assigned to the ruler. The measurement unit of the length is specified by the value of uUnit parameter.

L_UINT uUnit

Value that specifies the measurement unit of the length.  Possible values are:

L_UINT uFlags

Flags that indicate the direction to which the calibration is applied. Possible values are:

The following flags that determine whether to apply the feature on the one cell only, or more than one cell. This value can only be used when the cell is attached to the LImageViewer through the function LImageViewer::InsertCell. Possible values are:

Returns

Comments

This function works only on the ruler annotation. To calibrate one or both axes, set the uFlags parameter. To calibrate the cell without having to use a ruler, use the LImageViewerCell::CalibrateCell function.

To calibrate the ruler it must be selected before calling the function; otherwise, the function will return ERROR_INV_PARAMETER.

If the measurement unit of the selected ruler differs from the measurement unit of the viewer, the value of the uUnit parameter will be ignored and the measurement unit of the viewer will be used instead. (For example: if the user calibrates the ruler to 1 inch, and the viewer measurement unit is centimeters, the ruler length will be 2.54 centimeters).

To obtain the measurement unit of the viewer, call the LImageViewerCell::GetRulerUnit function.

To change the measurement unit of the viewer, call the LImageViewerCell::SetRulerUnit function.

Image viewer must be created before calling this function using Create function or an error will be returned.

Required DLLs and Libraries

• LTIVW
• For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application.

L_INT LImageViewer_CalibrateRulerExample(LImageViewerCell& ImageViewerCell)  
{ 
   L_UINT uUnit;  
   L_DOUBLE dValue = 2; 
 
   ImageViewerCell.GetRulerUnit(&uUnit, 0);  
 
   if (uUnit != CONTAINER_RULERUNIT_CENTIMETERS)  
      ImageViewerCell.SetRulerUnit(CONTAINER_RULERUNIT_CENTIMETERS, 0);  
 
   ImageViewerCell.CalibrateRuler(0, dValue, CONTAINER_RULERUNIT_CENTIMETERS, 0);  
 
   return SUCCESS;  
}