LVectorLayer::LVectorLayer

// This example enumerates through all layers in a vector. 
#ifdef LMyVectorBase4 
class LMyVectorBase4: public LVectorBase 
{ 
public: 
   L_INT          m_nLayerCount ; 
 
public: 
   LMyVectorBase4() {m_nLayerCount=0;}; 
   virtual ~LMyVectorBase4(){}; 
   virtual L_INT EnumLayersCallBack(pVECTORHANDLE pVector, pVECTORLAYER pLayer); 
}; 
#endif // #ifdef LMyVectorBase4 
 
L_INT LVectorLayer__LVectorLayerExample_1(HWND hWnd, LMyVectorBase4 *pMyVector) 
{ 
   UNREFERENCED_PARAMETER(hWnd); 
 
   L_INT          nRet; 
   LMyVectorBase4 MyVector; 
   L_TCHAR        szMsg[100]; 
 
   pMyVector->m_nLayerCount=0; 
 
   nRet = pMyVector->EnumLayers(); 
   if(nRet != SUCCESS) 
      return nRet; 
 
   wsprintf(szMsg, TEXT("Total Layers[%d]"), pMyVector->m_nLayerCount); 
 
   MessageBox(NULL, szMsg, TEXT(""), MB_OK); 
 
   return SUCCESS; 
} 
 
// This is an example for LVectorLayer::LVectorLayer(pVector): 
 
//Example95 
L_INT LVectorLayer__LVectorLayerExample_2(HWND hWnd, LVectorBase *pVector) 
{ 
   UNREFERENCED_PARAMETER(hWnd); 
 
   LVectorLayer   VectorLayer(pVector); 
 
   //Assoicate the LVectorLayer with an LVectorBase 
   //Note that most functions that use an LVectorLayer do this automatically 
   VectorLayer.SetVector(pVector); 
 
   //...Do something with the vector layer 
 
   //...LVectorLayer destructor is called when VectorLayer goes out of scope. 
 
   return SUCCESS; 
} 
 
// This is an example for LVectorLayer::LVectorLayer(pLayerDesc=NULL, pVector=NULL): 
 
// This example will add a new layer to a vector handle.  
L_INT LVectorLayer__LVectorLayerExample_3(HWND hWnd, LVectorBase *pVector) 
{ 
   UNREFERENCED_PARAMETER(hWnd); 
 
   L_INT             nRet; 
   LVectorLayer      VectorLayer; 
   VECTORLAYERDESC   LayerDesc; 
 
   nRet = VectorLayer.GetLayerDesc(&LayerDesc); 
   if(nRet != SUCCESS) 
      return nRet; 
 
   lstrcpy(LayerDesc.szName, TEXT("Terry's New Layer")); 
 
   nRet = VectorLayer.SetLayerDesc(&LayerDesc); 
   if(nRet != SUCCESS) 
      return nRet; 
 
   nRet = pVector->AddLayer(&VectorLayer, VECTOR_FLAGS_RENAME_DUPLICATES); 
   if(nRet != SUCCESS) 
   { 
      MessageBox( NULL, TEXT("Could not add layer!"), TEXT(""), MB_OK ); 
 
      return nRet; 
   } 
 
   //...LVectorLayer destructor is called when VectorLayer goes out of scope. 
 
   return SUCCESS; 
} 
 
// This is also an example for LVectorLayer::LVectorLayer(pLayerDesc=NULL, pVector=NULL): 
// This example demonstrates the use of the LVectorLayer constructor 
 
L_INT LVectorLayer__LVectorLayerExample_4(HWND hWnd, LVectorBase *pVector) 
{ 
   UNREFERENCED_PARAMETER(hWnd); 
 
   L_INT             nRet; 
   VECTORLAYERDESC   LayerDesc; 
 
   LayerDesc.bLocked = FALSE; 
   LayerDesc.bVisible = TRUE; 
   LayerDesc.dwTag = 1; 
   LayerDesc.nSize = sizeof(VECTORLAYERDESC); 
   lstrcpy(LayerDesc.szName, TEXT("My New Layer")); 
 
   LVectorLayer VectorLayer(&LayerDesc); 
 
   nRet = pVector->AddLayer (&VectorLayer, VECTOR_FLAGS_RENAME_DUPLICATES); 
   if(nRet != SUCCESS) 
   { 
      MessageBox( NULL, TEXT("Could not add layer!"), TEXT(""), MB_OK ); 
 
      return nRet; 
   } 
 
   //...LVectorLayer destructor is called when VectorLayer goes out of scope. 
 
   return SUCCESS; 
}