#include "ltwrappr.h"

virtual L_DOUBLE LAnnRuler::GetGaugeLength()

Gets the length of the gauge (the perpendicular lines at the ends of the Ruler object).


The object's gauge length.


The gauge length property applies only to Automation, PolyRuler, and Ruler objects. Refer to Annotation Automation Object.

Length is expressed in pixels, not in points. The length is for the whole line, not just from the end point of the ruler to the end point of the gauge - it is from one end of the gauge to the other end of the gauge.

Required DLLs and Libraries


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


Win32, x64.

See Also


Class Members, LAnnPolyRuler::GetDistance2, ANNSMARTDISTANCE, LAnnotation::CalibrateRuler


Annotation Functions: Working with the Toolbar


Implementing Annotations


Automated User Interface for Annotations


Using Rulers in Annotation Objects


Calibrating Annotation Ruler Objects


L_INT LAnnRuler_GetGaugeLengthExample(LAnnRuler  * pAnnObject) 
   L_INT nRet; 
   L_DOUBLE dLength; 
   /* if gauge length setting for the Automation object 
   is larger than 5 pixels, then make it 5 pixels. */ 
   dLength = pAnnObject->GetGaugeLength(); 
   if(dLength > 5.0f) 
      nRet = pAnnObject->SetGaugeLength( 5.0f, 0); 
      if(nRet != SUCCESS) 
         return nRet; 
   return SUCCESS; 

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