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

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

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.

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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LEADTOOLS Vector C++ Class Library Help

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Classes and Member Functions

Appendix

Functions:	LVectorBase::AddLayer, LVectorLayer::DeleteLayer, LVectorBase::CopyLayer, LVectorLayer::AddObject, LVectorBase::CopyObject, LVectorBase::GetLayerByIndex, LVectorBase::GetLayerByName
Topics:	Working with Vector Layers