L_AnnSetNodes

Show in webframe

#include "l_bitmap.h"

L_LTANN_API L_INT L_AnnSetNodes(hObject, bShowNodes, uGapNodes, uFlags)

HANNOBJECT hObject;	/* handle to the annotation object */
L_BOOL bShowNodes;	/* flag that indicates whether to show the nodes */
L_UINT uGapNodes;	/* distance between nodes */
L_UINT uFlags;	/* flags that determine which objects to process */

Determines which nodes will be shown for those annotation objects that use nodes.

Parameter	Description
hObject	Handle of the annotation object.
bShowNodes	Flag that indicates whether to show the nodes. Possible values are:
	Value	Meaning
	TRUE	Show the nodes.
	FALSE	Do not show the nodes.
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.

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 L_AnnGetSelected and L_AnnSetSelected 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.

Returns

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

Comments

Determines which nodes of the annotation object should display when in design mode.

This function is valid for the following annotation objects:

Curve

Closed Curve

Freehand

Freehand Hotspot

Polygon

Polyline

In addition, the Automation object stores node settings along with the other object default settings

If hObject is a Curve, Closed Curve, Polygon, Polyline, Freehand Hot Spot, or Freehand object, this function determines how the nodes for the object will be displayed in design mode.

If hObject is an Automation object, this function determines how the nodes will be displayed for the next Curve, Closed Curve, Polygon, Polyline, Freehand Hot Spot, or Freehand object created in automated mode.

If hObject is a Container object, this function determines how the nodes of the Curve, Closed Curve, Polygon, Polylines, Freehand Hot Spot, or Freehand objects within the container will be displayed.

If bShowNodes is set to 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

LTANN

For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application.

Platforms

Win32, x64.

See Also

Functions:	L_AnnGetNodes
Topics:	Annotation Functions: Object Properties
	Annotation Objects - Default Values
	Annotation Objects - Automated Features
	Implementing an Automated Annotation Program
	Implementing a Non-automated Annotation Program
	Altering Annotation Object Settings

Example

L_INT EXT_CALLBACK SetNodesAnnEnumCallback(HANNOBJECT   hObject,
                                          L_VOID*       pUserData)
{
   UNREFERENCED_PARAMETER(pUserData);
   L_BOOL ShowNodes;
   L_UINT GapNodes, Type;

   L_AnnGetType(hObject, &Type);
   switch(Type)
   {
   case ANNOBJECT_POLYGON:
   case ANNOBJECT_POLYLINE:
   case ANNOBJECT_FREEHAND:
      L_AnnGetNodes(hObject, &ShowNodes, &GapNodes);
      if (ShowNodes == FALSE)
         ShowNodes = TRUE;
      if (GapNodes != 1)
         GapNodes = 1;
      L_AnnSetNodes(hObject, ShowNodes, GapNodes, 0);
      break;

   default:
      MessageBox(NULL, TEXT("This object does not have nodes."), TEXT("Notice"), MB_OK);
   }
   return SUCCESS;
}

 L_INT AnnSetNodesExample(HANNOBJECT hContainer)
{
   L_INT nRet;
   nRet = L_AnnEnumerate(hContainer, (ANNENUMCALLBACK)SetNodesAnnEnumCallback, NULL, ANNFLAG_RECURSE|ANNFLAG_SELECTED, NULL);
   if(nRet != SUCCESS)
      return nRet;
   return SUCCESS;
}