LVectorBase::GetGroupCount

#include "ltwrappr.h"

virtual L_INT LVectorBase::GetGroupCount()

Returns the number of groups inside the vector handle.

Returns

Number of groups.

Comments

After calling this function, LVectorBase::GetGroupByIndex can be used to iterate through the groups in a vector handle.

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::GetGroupByName, LVectorBase::GetGroupByIndex, LVectorGroup::GetGroupDesc

Topics:

Working with Vector Groups

Example

This example will copy the first group (and objects) from a vector into pVector. 

#define MAKE_IMAGE_PATH(pFileName) TEXT("C:\\Users\\Public\\Documents\\LEADTOOLS Images\\")pFileName
L_INT LVectorBase__GetGroupCountExample(HWND hWnd, LVectorBase *pVector)
{
   L_TCHAR        szMsg[100];
   LVectorGroup   VectorGroup;
   L_INT          nRet, nCount;
   //Load a source vector
   LVectorBase VectorSrc;
   nRet = VectorSrc.Load(MAKE_IMAGE_PATH(TEXT("group.vec")));
   if(nRet != SUCCESS)
      return nRet;
   nCount = VectorSrc.GetGroupCount ();
   if (nCount > 0)
   {
      //Get first group of source
      nRet = VectorSrc.GetGroupByIndex(0, &VectorGroup);
      if (nRet == SUCCESS)
      {
         //Get the name of the first group.
         VECTORGROUPDESC GroupDesc;
         nRet = VectorGroup.GetGroupDesc(&GroupDesc);
         if(nRet != SUCCESS)
            return nRet;
         wsprintf(szMsg, TEXT("Group Retrieved\nName[%s]"),GroupDesc.szName); 
         MessageBox(hWnd, szMsg, TEXT(""), MB_OK);
         
         //Create new group in destination vector
         LVectorGroup NewVectorGroup(&GroupDesc);
         nRet = pVector->AddGroup(&NewVectorGroup);
         if(nRet != SUCCESS)
            return nRet;
         
         //Copy group and objects into pVector active group
         nRet = pVector->CopyGroup(&NewVectorGroup, &VectorGroup);
         if(nRet != SUCCESS)
            return nRet;
         nRet = pVector->Save(MAKE_IMAGE_PATH(TEXT("erase2.vec")), FILE_VECTOR_DUMP);
         if(nRet != SUCCESS)
            return nRet;
      }
      else
         return nRet;
   }
   else
   {
      MessageBox(hWnd, TEXT("No groups in source"), TEXT(""), MB_OK);
   }
   return SUCCESS;
}