LVectorBase::EnumLayers

#include "ltwrappr"

virtual L_INT LVectorBase::EnumLayers(L_VOID)

Enumerates all layers inside the class object's associated vector handle.

Returns

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

Comments

The LVectorBase::EnumLayers function calls the LVectorBase::EnumLayersCallBack function as it gets a pointer to each vector layer.

To use the LVectorBase::EnumLayersCallBack, you must derive a class from LVectorBase and override the LVectorBase::EnumLayersCallBack member function.

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::EnumLayersCallBack, Class Members
Topics:	Working with Vector Layers

Example

// This example enumerates through all layers in a vector.
class LMyVectorBase4: public LVectorBase
{
public:
   L_INT          m_nLayerCount ;

public:
   LMyVectorBase4() {m_nLayerCount=0;};
   virtual ~LMyVectorBase4(){};
   virtual L_INT EnumLayersCallBack(pVECTORHANDLE pVector, pVECTORLAYER pLayer);
};

L_INT LMyVectorBase4::EnumLayersCallBack(pVECTORHANDLE pVector, pVECTORLAYER pLayer)
{
   LVectorLayer VectorLayer(pLayer, this);
   L_TCHAR szMsg[100];
   m_nLayerCount++;

   VECTORLAYERDESC LayerDesc;
   VectorLayer.GetLayerDesc(&LayerDesc);
   wsprintf(szMsg, TEXT("Layer\nName[%s]\nSize[%d]\nLocked[%d]\nVisible[%d]"),
      LayerDesc.szName,
      LayerDesc.nSize,
      LayerDesc.bLocked,
      LayerDesc.bVisible
      );
   MessageBox(NULL, szMsg, TEXT(""), MB_OK);
   return SUCCESS ;
   //...LVectorLayer destructor called when VectorLayer goes out of scope
}

L_VOID Example74(HWND hWnd, LMyVectorBase4 *pMyVector)
{
   LMyVectorBase4 MyVector;
   L_TCHAR szMsg[100];

   pMyVector->m_nLayerCount=0;
   pMyVector->EnableCallBack(TRUE);
   pMyVector->EnumLayers();
   wsprintf(szMsg, TEXT("Total Layers[%d]"), pMyVector->m_nLayerCount);
   MessageBox(NULL, szMsg, TEXT(""), MB_OK);
}