LVectorBase::Empty

#include "ltwrappr.h"

virtual L_INT LVectorBase::Empty(L_VOID)

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

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

Returns

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

LVKRN

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

See Also

Functions:	LVectorBase::IsEmpty, LVectorBase::Copy, LVectorFile::LoadFile, LVectorBase::AddLayer, LVectorBase::AddObject
Topics:	Working with Vector Handles

Example

This example removes all layers and objects.

#define MAKE_IMAGE_PATH(pFileName) TEXT("C:\\Users\\Public\\Documents\\LEADTOOLS Images\\")pFileName
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;
}