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LVectorBase::Empty

Summary

Deletes all layers and objects from the class object's associated vector.

This function is available in the LEADTOOLS Vector Imaging Pro Toolkit.

Syntax

#include "ltwrappr.h"

virtual L_INT LVectorBase::Empty(L_VOID)

Returns

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

Comments

Calling this function will not affect other settings such as camera, transformation, etc.

Required DLLs and Libraries

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

Example

This example removes all layers and objects.

L_INT LVectorBase__EmptyExample() 
{ 
   L_INT       nRet; 
   LVectorBase Vector; 
   L_BOOL      bEmpty; 
   L_TCHAR*    pszMsg; 
 
   nRet = Vector.Load(MAKE_IMAGE_PATH(TEXT("random.dxf"))); 
   if(nRet != SUCCESS) 
      return nRet; 
 
   nRet = Vector.IsEmpty(&bEmpty); 
   if(nRet != SUCCESS) 
      return nRet; 
 
   pszMsg = bEmpty? TEXT("Vector is Empty"): TEXT("Vector has layers/objects"); 
 
   MessageBox(NULL, pszMsg, NULL, MB_OK); 
 
   nRet = Vector.Empty(); 
   if(nRet != SUCCESS) 
      return nRet; 
 
   nRet = Vector.IsEmpty(&bEmpty); 
   if(nRet != SUCCESS) 
      return nRet; 
 
   pszMsg = bEmpty? TEXT("Vector is Empty"): TEXT("Vector has layers/objects"); 
 
   MessageBox(NULL, pszMsg, NULL, MB_OK); 
 
   return SUCCESS; 
}