LVectorLayer::EmptyLayer

#include "ltwrappr.h"

virtual L_INT LVectorLayer::EmptyLayer(L_VOID)

Empties the class object's associated layer. This function is available in the LEADTOOLS Vector Imaging Pro Toolkit.

Returns

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

Comments

The layer is emptied by deleting all objects within that layer.

To delete a layer, call LVectorLayer::DeleteLayer

Required DLLs and Libraries

See Also

Functions

Topics

Example

This example will empty all objects from the second layer (index 1).

L_INT LVectorLayer__EmptyLayerExample(HWND hWnd, LVectorBase *pVector) 
{ 
   UNREFERENCED_PARAMETER(hWnd); 
 
   L_INT          nRet; 
   LVectorLayer   VectorLayer; 
 
   nRet = pVector->GetLayerByIndex(1, &VectorLayer); 
   if (nRet == SUCCESS) 
   { 
      nRet = VectorLayer.EmptyLayer(); 
      if(nRet != SUCCESS) 
         return nRet; 
   } 
   else 
   { 
      MessageBox(hWnd, TEXT("Vector has less than two layers"), TEXT(""), MB_OK); 
 
      return nRet; 
   } 
 
   return SUCCESS; 
} 

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