Determines which nodes will be shown for a Polygon object.


#include "ltwrappr.h"

virtual L_INT LAnnAutomation::SetNodes(bShowNodes=TRUE, uGapNodes=0, uFlags=0)


L_BOOL bShowNodes

Flag that indicates whether to show the nodes. Possible values are:

Value Meaning
TRUE Show the nodes.
FALSE Do not show the nodes.

L_UINT uGapNodes

The distance between nodes. Use 0 to display all nodes. This value does not represent the distance in pixels. Instead, it refers to the number of nodes to skip before displaying another node. Possible values are:

Value Meaning
0 Show every node.
1 Show a node, skip a node, show a node
9 Show a node, skip the next nine,
and so on

L_UINT uFlags

Flags that determine which objects to process. Most of the flags apply only to container objects. You can combine values when appropriate by using a bitwise OR ( | ). The following are valid values:

Value Meaning
0 Process only the specified object.
ANNFLAG_SELECTED [0x0001] Process only objects that have the selected property set to TRUE. For getting and setting the selected property, use the LAnnContainer::GetSelectItems and LAnnotation::SetSelected functions.
ANNFLAG_NOTTHIS [0x0004] Process only one level of objects within the specified container, not the container itself. If there are containers within the container, they are modified, but the objects within them are not.
ANNFLAG_RECURSE [0x0008] Process objects within a container, and within any subcontainers, down to any level.
ANNFLAG_NOTCONTAINER [0x0002] (Used with ANNFLAG_RECURSE) Process objects within containers, not the containers themselves.
ANNFLAG_NOINVALIDATE [0x0010] Do not invalidate the affected rectangle in the window. Use this to avoid generating unwanted paint messages.
ANNFLAG_CHECKMENU [0x0020] Process objects only if the ANNAUTOTEXT_MENU_NODES menu item has been selected.


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


This function determines how the nodes for the next polyline, polygon, freehand, or freehand hotspot objects, created in automated mode, will be displayed.

If bShowNodes is FALSE, uGapNodes will be ignored since the nodes will not be shown anyway.

Note: The last node is always shown. Therefore, using a large value for uGapNodes will probably result in only the first and last nodes being shown.

Required DLLs and Libraries


Win32, x64.

See Also




L_INT LAnnAutomation_SetNodesExample()  
   L_INT nRet; 
   LAnnAutomation MyAnnAutomation; 
   L_BOOL bShowNodes; 
   L_UINT uGapNodes; 
   nRet = MyAnnAutomation.GetNodes(&bShowNodes, &uGapNodes); 
   if(nRet != SUCCESS) 
      return nRet; 
   //skip more nodes than currently skipping 
   nRet = MyAnnAutomation.SetNodes(bShowNodes, uGapNodes + 1); 
   if(nRet != SUCCESS) 
      return nRet; 
   //Get default ShowFlags 
   L_UINT uShowFlags; 
   nRet = MyAnnAutomation.GetShowFlags(&uShowFlags); 
   if(nRet != SUCCESS) 
      return nRet; 
   //Do not display ruler gauge 
   uShowFlags &= ~ANNSHOW_GAUGE; 
   nRet = MyAnnAutomation.SetShowFlags(uShowFlags); 
   if(nRet != SUCCESS) 
      return nRet; 
   return SUCCESS; 
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