L_AnnSetUnit

#include "l_bitmap.h"

L_LTANN_API L_INT L_AnnSetUnit(hObject, uUnit, pUnitAbbrev, uPrecision, uFlags)

Sets the unit of measurement for the rulers used by those objects that use rulers.

Returns

Comments

The following annotation objects utilize one or more rulers as part of the annotation:

ANNOBJECT_RULER

ANNOBJECT_POLYRULER

ANNOBJECT_PROTRACTOR

ANNOBJECT_CROSSPRODUCT

In addition, the Automation object (ANNOBJECT_AUTOMATION) stores default unit settings along with the other object default settings.

The default unit of measure for ruler, polyruler, and crossproduct objects is smart English. With the smart units, the unit changes with the length. For example, if the length is 11 inches (assuming the default precision of 2 is being used), "11.00 in" displays whereas if the length is 15 inches, "1 ft 3.00 in" displays. Call the L_AnnSetUnit function to set the unit of measurement and its precision for the ruler. The precision indicates how many digits to display to the right of the decimal point in the length. Call the L_AnnGetUnit function to get the unit of measurement and its precision for the ruler. The L_AnnGetDistance2 function gets the length of each ruler that makes up an object, and the total length of all rulers.

This function applies to multiple and selected objects based on the value of the uFlags parameter.

Only Automation and Ruler objects are affected. Refer to Annotation Automation Object.

Required DLLs and Libraries

Platforms

Win32, x64.

See Also

Example

TCHAR * GetUnitString(L_UINT uUnit)
{
   TCHAR *pszUnit = TEXT("");
   switch(uUnit)
   { 
   case ANNUNIT_INCHES:
      pszUnit = TEXT("ANNUNIT_INCHES");
      break;
   case ANNUNIT_FEET:
      pszUnit = TEXT("ANNUNIT_FEET");
      break;
   case ANNUNIT_YARDS:
      pszUnit = TEXT("ANNUNIT_YARDS");
      break;
   case ANNUNIT_MICROMETERS:
      pszUnit = TEXT("ANNUNIT_MICROMETERS");
      break;
   case ANNUNIT_MILLIMETERS:
      pszUnit = TEXT("ANNUNIT_MILLIMETERS");
      break;
   case ANNUNIT_CENTIMETERS:
      pszUnit = TEXT("ANNUNIT_CENTIMETERS");
      break;
   case ANNUNIT_METERS:
      pszUnit = TEXT("ANNUNIT_METERS");
      break;
   case ANNUNIT_TWIPS:
      pszUnit = TEXT("ANNUNIT_TWIPS");
      break;
   case ANNUNIT_POINTS:
      pszUnit = TEXT("ANNUNIT_POINTS");
      break;
   case ANNUNIT_PIXELS:
      pszUnit = TEXT("ANNUNIT_PIXELS");
      break;
   case ANNUNIT_SMART_METRIC:
      pszUnit = TEXT("ANNUNIT_SMART_METRIC");
      break;
   case ANNUNIT_SMART_ENGLISH:
      pszUnit = TEXT("ANNUNIT_SMART_ENGLISH");
      break;

   }
   return pszUnit;
}

 L_INT AnnSetUnitExample(HANNOBJECT hAnnObject)
{
   L_INT nRet;
   /* get the current measurement unit settings and display them */
   /* if unit is not inches, make it so */

   L_SIZE_T zLen;
   L_UINT   uType = 0;
   L_UINT   uUnit;
   HGLOBAL  hUnitAbbrev;
   L_TCHAR* pUnitAbbrev=NULL;
   L_UINT   uPrecision;
   L_TCHAR  buf[180];
   L_TCHAR  dis[180];
   L_TCHAR  format[180];
   L_DOUBLE dDistance;
   L_DOUBLE dDistance2;

   /* first, get unit abbreviation string len */
   nRet = L_AnnGetUnit(hAnnObject, NULL, NULL, &zLen, NULL);
   if(nRet != SUCCESS)
      return nRet;

   /* allocate enough memory for the abbreviation string */
   hUnitAbbrev = GlobalAlloc(GMEM_MOVEABLE, zLen * sizeof (L_TCHAR));
   pUnitAbbrev = (L_TCHAR*)GlobalLock(hUnitAbbrev);

   /* get the settings */
   nRet = L_AnnGetUnit(hAnnObject, &uUnit, pUnitAbbrev, &zLen, &uPrecision);
   if(nRet != SUCCESS)
      return nRet;

   /* and, get the distance */
   nRet = L_AnnGetDistance(hAnnObject, &dDistance, &dDistance2);
   if(nRet != SUCCESS)
      return nRet;

   /* display current settings & distance in current unit of measurement */
   L_AnnGetType(hAnnObject, &uType);
   _stprintf_s(buf, TEXT("Object Type: %d\nUnit: %s\nAbbrev: %s\nPrecision: %d\n"),
      uType, GetUnitString(uUnit), pUnitAbbrev, uPrecision);
   _stprintf_s(format, TEXT("Distance: %%.%df\n"),uPrecision);
   _stprintf_s(dis, format, dDistance);
   lstrcat(buf, dis);

   MessageBox(NULL, buf, TEXT("Units"), MB_OK);

   /* if unit is not inches, make it so */
   if(uUnit != ANNUNIT_INCHES)
   {
      nRet = L_AnnSetUnit(hAnnObject, ANNUNIT_INCHES, TEXT("in"), 2, 0);
      if(nRet != SUCCESS)
         return nRet;
   }

   GlobalUnlock(hUnitAbbrev);
   GlobalFree(hUnitAbbrev);
   return SUCCESS;
}