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L_VecAddObjectToGroup

Summary

Adds a new object to a vector group. This function is available in the LEADTOOLS Vector Imaging Pro Toolkit.

Syntax

#include "ltvkrn.h"

L_LVKRN_API L_INT L_VecAddObjectToGroup(pVector, pGroup, nType, pObjectDesc, pNewObject)

Parameters

pVECTORHANDLE pVector

Pointer to the destination vector handle.

const pVECTORGROUP pGroup

Pointer to the destination vector group.

L_INT nType

Type of object to add. Possible values are:

Value	Meaning
VECTOR_ARC	Arc.
VECTOR_CHORD	Chord.
VECTOR_CIRCLE	Circle.
VECTOR_ELLIPSE	Ellipse.
VECTOR_ELLIPTICALARC	Elliptical arc.
VECTOR_LINE	Line.
VECTOR_PIE	Pie section.
VECTOR_POLYBEZIER	Poly Bezier curve.
VECTOR_POLYDRAW	Polydraw.
VECTOR_POLYGON	Polygon.
VECTOR_POLYLINE	Polyline.
VECTOR_RASTER	Raster.
VECTOR_RECTANGLE	Rectangle.
VECTOR_TEXT	Text.
VECTOR_VERTEX	3D vertex in space.

const L_VOID * pObjectDesc

Pointer to a vector object that contains information about the object to add.

pVECTOROBJECT pNewObject

Pointer to a VECTOROBJECT structure that references the newly added object.

Returns

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

Comments

If pNewObject is NULL, this pointer will not be updated with the address of the newly added object.

You may need to cast from your given object type (VECTORPOLYGON, VECTORTEXT, etc) when using this function. (See the example below.)

You cannot add a VECTOR_CLONE to a vector group.

Required DLLs and Libraries

LTVKRN
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 create a new vector group with the given name that contains all currently selected objects inside a vector handle.

L_INT EXT_CALLBACK MyEnumObjectsProc( 
   pVECTORHANDLE pVector, 
   const pVECTOROBJECT pObject, 
   L_VOID* pUserData ) 
{ 
   L_INT nRet; 
   pVECTORGROUP pGroup; 
   L_TCHAR pBuffer[ VECTOR_OBJECT_BUFFER_SIZE ]; 
 
   /* Add all objects into this group */ 
   if( pObject->nType != VECTOR_CLONE )  /* should not be a VECTOR_CLONE */ 
   { 
      nRet = L_VecGetObject( pVector, pObject, pObject->nType, pBuffer ); 
      if(nRet != SUCCESS) 
         return nRet; 
 
      pGroup = (pVECTORGROUP) pUserData; 
      nRet = L_VecAddObjectToGroup ( pVector, pGroup, pObject->nType, pBuffer, NULL ); 
      if(nRet != SUCCESS) 
         return nRet; 
 
      nRet = L_VecFreeObject( pObject->nType, pBuffer ); 
      if(nRet != SUCCESS) 
         return nRet; 
   } 
   return SUCCESS; 
} 
 
L_LTVKRNTEX_API L_INT VecAddObjectToGroupCBExample( 
   pVECTORHANDLE pVector, 
   const L_TCHAR *pszName) 
{ 
   L_INT nRet; 
   VECTORGROUPDESC GroupDesc; 
   VECTORGROUP Group; 
 
   /* Add a new empty group */ 
   memset( &GroupDesc, 0, sizeof( GroupDesc ) ); 
   GroupDesc.nSize = sizeof( GroupDesc ); 
   lstrcpy( GroupDesc.szName, pszName ); 
   nRet = L_VecAddGroup( pVector, &GroupDesc, &Group, 0L ); 
   if(nRet != SUCCESS) 
      return nRet; 
 
   /* Add all selected objects into this group */ 
   nRet = L_VecEnumObjects(pVector, MyEnumObjectsProc, &Group, VECTOR_FLAGS_SELECTED_ONLY); 
 
   return nRet; 
}