Blt_TreeDeleteNode - Deletes a node and its descendants.
Blt_Tree tree (in) Tree containing the node.
Blt_TreeNode node (in) Node to be deleted.
This procedure deletes a given node and all it descendants from a tree
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.
Always returns TCL_OK. Errors generated in a notification callbacks
are backgrounded (see Tcl_TreeCreateNotifyHandler).
The following example deletes the root node.
root = Blt_TreeRootNode(token);
Blt_TreeDeleteNode can trigger tree notify events. You can be notified
whenever a node is deleted by using the Blt_TreeCreateNotifyHandler. A
callback routine is registered that will be automatically invoked
whenever a node is deleted via Blt_TreeDeleteNode to the tree.