Blt_TreeNodeId(3) BLT Library Procedures Blt_TreeNodeId(3)__________________________________________________________________________________________________________________________________________________NAME
Blt_TreeNodeId - Returns the node serial number.
SYNOPSIS
#include <bltTree.h>
unsigned int
Blt_TreeNodeId(node)
ARGUMENTS
Blt_TreeNode node (in) Node whose ID is to be returned.
_________________________________________________________________DESCRIPTION
This procedure returns the node serial number. The node serial number is useful for programs that export the tree data object to the Tcl
programming level. Since node labels (and therefore pathnames) are not unique, the ID can be used to uniquely identify a node.
The arguments are as follows:
node The node whose serial number is returned. The serial number of the root node for example is always 0.
RETURNS
The serial number of the node. Nodes are given a unique serial number when they are created. You can use the ID to later retrieve the
node using Blt_TreeGetNode.
EXAMPLE
The following example prints the ID of a node.
printf("root ID is %s
", Blt_TreeNodeId(node));
KEYWORDS
Tcl_TreeCreateNode, Tcl_TreeDeleteNode
BLT 2.4 Blt_TreeNodeId(3)
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Blt_TreeDeleteNode(3) BLT Library Procedures Blt_TreeDeleteNode(3)__________________________________________________________________________________________________________________________________________________NAME
Blt_TreeDeleteNode - Deletes a node and its descendants.
SYNOPSIS
#include <bltTree.h>
Blt_TreeNode
Blt_TreeDeleteNode(tree, node)
ARGUMENTS
Blt_Tree tree (in) Tree containing the node.
Blt_TreeNode node (in) Node to be deleted.
_________________________________________________________________DESCRIPTION
This procedure deletes a given node and all it descendants from a tree data object.
The arguments are as follows:
tree The tree containing the parent node.
node Node to be deleted. The node and its descendant nodes are deleted. Each node's data values are deleted also. The reference
count of the Tcl_Obj is decremented.
Since all tree objects must contain at least a root node, the root node itself can't be deleted unless the tree is released and destroyed.
Therefore you can clear a tree by deleting its root, but the root node will remain until the tree is destroyed.
RETURNS
Always returns TCL_OK. Errors generated in a notification callbacks are backgrounded (see Tcl_TreeCreateNotifyHandler).
EXAMPLE
The following example deletes the root node.
Blt_TreeNode root;
root = Blt_TreeRootNode(token);
Blt_TreeDeleteNode(token, root);
NOTIFICATIONS
Blt_TreeDeleteNode can trigger tree notify events. You can be notified whenever a node is deleted by using the Blt_TreeCreateNotifyHan-
dler. A callback routine is registered that will be automatically invoked whenever a node is deleted via Blt_TreeDeleteNode to the tree.
KEYWORDS
tree, token
BLT 2.4 Blt_TreeDeleteNode(3)
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