L_VecGetActiveLayer

#include "lvkrn.h"

L_LVKRN_API L_INT L_VecGetActiveLayer(pVector, pLayer)

const pVECTORHANDLE pVector;	pointer to vector handle
pVECTORLAYER pLayer;	pointer to vector layer

Gets the active layer inside the specified vector handle.

Parameter	Description
pVector	Pointer to the source vector handle.
pLayer	Pointer to a VECTORLAYER structure to be updated with the active layer.

Returns

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

Comments

Some functions will use the active layer when NULL is passed for a pVECTORLAYER parameter. This makes it easier to work with the toolkit when layers are not needed.

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 show the name of the current active layer inside the vector handle.

L_INT VecGetActiveLayerExample(pVECTORHANDLE pVector) 
{ 
   VECTORLAYER       Layer; 
   VECTORLAYERDESC   LayerDesc; 
   L_INT             nRet; 
   /* Get the active layer layer */ 
   nRet = L_VecGetActiveLayer( pVector, &Layer ); 
   if( nRet == SUCCESS ) 
   { 
      /* Get its name */ 
      nRet = L_VecGetLayer( pVector, &Layer, &LayerDesc ); 
      if(nRet != SUCCESS) 
         return nRet; 
      MessageBox( NULL, LayerDesc.szName, TEXT("Active Layer"), MB_OK ); 
      nRet = L_VecFreeLayer( &LayerDesc ); 
   } 
   else 
      MessageBox( NULL, TEXT("Not found!!"), TEXT("Active Layer"), MB_OK ); 
   return nRet; 
}

Help Version 19.0.2017.10.27

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LEADTOOLS Vector C API Help

Introduction

Version History

LEADTOOLS Vector Features

Redistributables/Files To Be Included With Your Application

Functions:	L_VecSetActiveLayer.
Topics:	Working with Vector Layers