Calls a function for each of the children of a #GNode. Note that it doesn't descend beneath the child nodes. @func must not do anything that would modify the structure of the tree.
which types of children are to be visited, one of %G_TRAVERSE_ALL, %G_TRAVERSE_LEAVES and %G_TRAVERSE_NON_LEAVES
the function to call for each visited node
user data to pass to the function
See Implementation
Calls a function for each of the children of a #GNode. Note that it doesn't descend beneath the child nodes. @func must not do anything that would modify the structure of the tree.