Public fields
labelText shown for the node.
dataAny R value attached to the node.
idOptional identifier.
loaderNULL or function(node) returning children, called
the first time the node is expanded.
loadedHas the loader run?
Active bindings
parentThe parent node (read-only).
childrenChild nodes (read-only).
expandedIs the node expanded? (assign to expand / collapse)
Methods
TreeNode$new()
Create a node. See tree_node().
Usage
TreeNode$new(
label,
children = list(),
data = NULL,
expanded = FALSE,
id = NULL,
loader = NULL
)
Arguments
labelLabel.
childrenChild nodes (or labels).
dataAttached value.
expandedStart expanded?
idIdentifier.
loaderLazy loader.
TreeNode$add()
Add a child.
Usage
TreeNode$add(node, data = NULL, expanded = FALSE)
Arguments
nodeA TreeNode or a label.
dataData for a node created from a label.
expandedExpanded state for a node created from a label.
TreeNode$remove()
Detach the node from its parent.
TreeNode$clear()
Remove all children.
TreeNode$expand()
Expand the node (running the loader if needed).
TreeNode$collapse()
Collapse the node.
TreeNode$toggle()
Toggle between expanded and collapsed.
TreeNode$expandable()
Can the node be expanded?
TreeNode$depth()
Depth below the root (the root is 0).
TreeNode$ancestors()
Parent, grandparent, ... up to the root.
TreeNode$path()
Labels from the root to this node.
TreeNode$walk()
This node and all descendants (depth first).
TreeNode$find()
Find a descendant by id.
TreeNode$changed()
Notify the tree view that the node changed.
TreeNode$print()
Print the subtree.
TreeNode$clone()
The objects of this class are cloneable with this method.
Usage
TreeNode$clone(deep = FALSE)
Arguments
deepWhether to make a deep clone.