L_AnnGetAngle

#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.

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)+1)); 
         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; 
}

Help Version 19.0.2017.10.27

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LEADTOOLS Raster Imaging C API Help

Introduction

Version History

Getting Started

LEADTOOLS Raster Imaging Features

Redistributables/Files To Be Included With Your Application

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