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Enumerates all layers inside the class object's associated vector handle.
#include "ltwrappr.h"
virtual L_INT LVectorBase::EnumLayers(L_VOID)
| Value | Meaning |
|---|---|
| SUCCESS | The function was successful. |
| < 1 | An error occurred. Refer to Return Codes. |
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.
This example enumerates through all layers in a vector.
#ifdef LMyVectorBase4class 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 LMyVectorBase4L_INT LMyVectorBase4::EnumLayersCallBack(pVECTORHANDLE pVector, pVECTORLAYER pLayer){UNREFERENCED_PARAMETER(pVector);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_INT LVectorBase__EnumLayersExample(HWND hWnd, LMyVectorBase4 *pMyVector){UNREFERENCED_PARAMETER(hWnd);L_INT nRet;LMyVectorBase4 MyVector;L_TCHAR szMsg[100];pMyVector->m_nLayerCount=0;pMyVector->EnableCallBack(TRUE);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;}