#include "ltwrappr.h"

virtual L_INT LAnnAutomation::SetBitmapDpiX(dDpiX, uFlags=0)


horizontal DPI value to set

L_UINT uFlags;

reserved for future use

Sets the horizontal Bitmap DPI (dots per inch) value that is used to translate the horizontal distance for Ruler objects.




The horizontal DPI value to set. Valid values are greater than or equal to 1.


If you pass 0 or a positive value less than 1, the value will default to 150. If you pass a negative value, the function will return an error.


Reserved for future versions, use 0.



The function was successful.

< 1

An error occurred. Refer to Return Codes.


You should set this value to the bitmaps XResolution. Call this function every time you load objects or paste them from the clipboard. Otherwise, the distances shown by the ruler objects will not be accurate.

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


LAnnAutomation::SetBitmapDpiY, LAnnAutomation::GetBitmapDpiX, LAnnAutomation::GetBitmapDpiY, LAnnAutomation::SetUnit, LAnnAutomation::GetUnit, LAnnAutomation::GetDistance, LAnnAutomation::SetGaugeLength, LAnnAutomation::GetGaugeLength, Class Members, LAnnAutomation::GetTicMarkLength, LAnnAutomation::SetTicMarkLength, LAnnPolyRuler::GetDistance2, ANNSMARTDISTANCE, LAnnotation::CalibrateRuler


Annotation Functions: Working with the Toolbar


Implementing Annotations


Automated User Interface for Annotations


Using Rulers in Annotation Objects


Key Annotation Features


Calibrating Annotation Ruler Objects


L_INT LAnnAutomation_SetBitmapDpiXExample(LAnnAutomation  * pAutomation, LBitmapBase * pBitmap) 
   L_INT nRet; 
   L_DOUBLE xRes; 
   L_DOUBLE yRes; 
   /* get the bitmap x and y res from the object */ 
   xRes = pAutomation->GetBitmapDpiX(); 
   yRes = pAutomation->GetBitmapDpiY(); 
   /* set all selected items to have the same dpi for ruler  tool as the bitmap */ 
   if(xRes != (L_DOUBLE) pBitmap->GetXResolution()) 
      nRet = pAutomation->SetBitmapDpiX((L_DOUBLE) pBitmap->GetXResolution(), 0); 
      if(nRet != SUCCESS) 
         return nRet; 
   if(yRes != (L_DOUBLE) pBitmap->GetYResolution()) 
      nRet = pAutomation->SetBitmapDpiY((L_DOUBLE) pBitmap->GetYResolution(), 0); 
      if(nRet != SUCCESS) 
         return nRet; 
   return SUCCESS; 

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