unidirectional linked list pointer problem Post: 302594182

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blt_treecreatenode

Blt_TreeCreateNode(3)					      BLT Library Procedures					     Blt_TreeCreateNode(3)

__________________________________________________________________________________________________________________________________________________

NAME

       Blt_TreeCreateNode - Creates a node in a tree data object.

SYNOPSIS

       #include <bltTree.h>

       Blt_TreeNode
       Blt_TreeCreateNode(tree, parent, name, position)

ARGUMENTS

       Blt_Tree       tree     (in)	 Tree containing the parent node.

       Blt_TreeNode   parent   (in)	 Node in which to insert the new child.

       const char     *name    (in)	 Node label.  If NULL, a label will automatically be generated.

       int	      position (in)	 Position in the parent's list of children to insert the new node.
_________________________________________________________________

DESCRIPTION

       This  procedure creates a new node is a tree data object.  The node is initially empty, but data values can be added with Blt_TreeSetValue.
       Each node has a serial number that identifies it within the tree.  No two nodes in the same tree will ever have the same ID.  You can  find
       a node's ID with Blt_TreeNodeId.

       The arguments are as follows:

       tree	 The tree containing the parent node.

       parent	 Node in which the new child will be inserted.

       name	 Label of the new node.  If name is NULL, a label in the form "node0", "node1", etc. will automatically be generated.  Name can be
		 any string.  Labels are non-unique.  A parent can contain two nodes with the same label. Nodes can be relabeled using Blt_TreeRe-
		 labelNode.

       position  Position  the parent's list of children to insert the new node.  For example, if position is 0, then the new node is prepended to
		 the beginning of the list.  If position is -1, then the node is appended onto the end of the parent's list.

RETURNS

       The new node returned is of type Blt_TreeNode.  It's a token that can be used with other routines to add/delete	data  values  or  children
       nodes.

EXAMPLE

       The following example creates a new node from the root node.

	      Blt_Tree token;
	      Blt_TreeNode root, node;

	      if (Blt_TreeGetToken(interp, "myTree", &token) != TCL_OK) {
		  return TCL_ERROR;
	      }
	      root = Blt_TreeRootNode(token);
	      node = Blt_TreeCreateNode(token, root, "myNode", -1);

NOTIFICATIONS

       Blt_TreeCreateNode  can	trigger  tree notify events.  You can be notified whenever a node is created by using the Blt_TreeCreateNotifyHan-
       dler.  A callback routine is registered that will be automatically invoked whenever a new node is added via Blt_TreeCreateNode to the tree.

KEYWORDS

       tree, token

BLT
									2.4						     Blt_TreeCreateNode(3)