L_AnnGetAngle

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#include "l_bitmap.h"

L_LTANN_API L_INT L_AnnGetAngle(hObject, pdAngle)

HANNOBJECT hObject;	/* handle to the annotation object */
L_DOUBLE *pdAngle;	/* address of a variable to be updated */

Gets the angle of the Protractor object in the object's unit of measurement, set by L_AnnSetProtractorOptions.

Parameter	Description
hObject	Handle to the annotation object.
pdAngle	Address of a variable to be updated with the angle of the protractor object specified in hObject.

Returns

SUCCESS	The function was successful.
< 1	An error occurred. Refer to Return Codes.

Comments

This function is only valid for Protractor annotation objects (ANNOBJECT_PROTRACTOR).

Required DLLs and Libraries

LTANN

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

Platforms

Win32, x64.

See Also

Functions:	L_AnnSetProtractorOptions,
	L_AnnGetProtractorOptions
Topics:	Annotation Functions: Object Properties
	Implementing Annotations
	Automated User Interface for Annotations
	Implementing an Automated Annotation Program
	Obtaining Annotation Object Information

Example

L_INT EXT_CALLBACK annAngleCallback(HANNOBJECT  hObject,
                                    L_VOID*      pUserData);

 L_INT AnnGetAngleExample(HANNOBJECT         hContainer//, /* Container annotation object */
                                         /*ANNENUMCALLBACK    annAngleCallback*/)
{
   L_INT nRet;
   nRet = L_AnnEnumerate(hContainer, annAngleCallback, NULL, ANNFLAG_RECURSE|ANNFLAG_NOTCONTAINER, NULL);
   if(nRet != SUCCESS)
      return nRet;
   return SUCCESS;
}

L_INT EXT_CALLBACK annAngleCallback(HANNOBJECT  hObject,
                                    L_VOID*      pUserData)
{
   UNREFERENCED_PARAMETER(pUserData);
   L_INT    nRet;
   L_DOUBLE dAngle;
   L_UINT   Type;
   L_TCHAR  cs[256];
   L_SIZE_T uAbbrevLen = 0;
   L_TCHAR *pszAbbrev = NULL;

   nRet = L_AnnGetType(hObject, &Type);
   if (nRet == SUCCESS)
   {
      switch (Type)
      {
      case ANNOBJECT_PROTRACTOR:
         uAbbrevLen = 0;
         pszAbbrev = NULL;
         L_AnnGetAngle(hObject, &dAngle);
         L_AnnGetProtractorOptions(hObject, NULL, NULL, &uAbbrevLen, NULL, NULL, NULL);

         pszAbbrev = (L_TCHAR *)malloc( uAbbrevLen * sizeof(L_TCHAR));
         L_AnnGetProtractorOptions(hObject, NULL, NULL, &uAbbrevLen, pszAbbrev, NULL, NULL);

         _stprintf_s(cs, TEXT("The angle is %f %s.\n"), dAngle, pszAbbrev);
         MessageBox(NULL, cs, TEXT("Results"), MB_OK);
         
         free(pszAbbrev);
         break;
      default:
         MessageBox(NULL, TEXT("This object is not a protractor."), TEXT(""), MB_OK);
      }
   }
   return SUCCESS;
}