TreeNode<T extends Object?> class

An element of a tree. A tree (managed by a controller) contains many nodes. The nodes define the structure of the tree.

identifier should be unique for each node and is usually related to your data. If you have no idea what your identifier should be, you should probably use the TreeNode.auto constructor to automatically assign the node an identifier.

Constructors

TreeNode(Object identifier, T data, {bool draggable = true, List<TreeNode<Object?>>? children, bool expanded = true})
Create a TreeNode.
TreeNode.auto(T data, {bool draggable = true, List<TreeNode<Object?>>? children, bool expanded = true})
Create a TreeNode with an automatically assigned unique identifier.

Properties

children ↔ List<TreeNode<Object?>>
The children of this node
getter/setter pair
data ↔ T
The data contained by this node.
getter/setter pair
depth ↔ int
The depth of this node, starting at 0 depth for the rootnodes of the tree.
getter/setter pair
draggable ↔ bool
A flag indicating if the node can be dragged.
getter/setter pair
expanded ↔ bool
A flag indicating if the node should be expanded in the ui.
getter/setter pair
hashCode → int
The hash code for this object.
no setterinherited
identifier → Object
The identifier of this node.
final
index → int
The index this node has in its sibling array
no setter
isAttached → bool
A flag indicating if this node is attached to a tree controller.
no setter
isBeingDragged ↔ bool
A flag indicating if the node is being dragged by the user.
getter/setter pair
isNotParent → bool
A flag indicating if this node is not a parent node (so a node with no child nodes)
no setter
isParent → bool
A flag indicating if this node is a parent node (so a node with children)
no setter
parent → TreeNode<Object?>?
The parent of this node
no setter
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
siblings → List<TreeNode<Object?>>
The siblings of this node
no setter

Methods

attachChild<U>(TreeNode<U> child, {int? index, bool notify = true}) → void
A method to attach a child to this node. Use this to attach new nodes to the tree.
attachSibling<U>(TreeNode<U> node, {int? index, bool notify = true}) → void
Adds a sibling next to this node or at index if it is specified. Use this to attach new nodes to the tree.
collapse({bool notify = true}) → void
Collapse this node in UI's.
expand({bool notify = true}) → void
Expand this node in UI's.
move(int index, {TreeNode<Object?>? newParent, bool notify = true}) → void
Move this node to the newParent or the root of the tree if no newParent is supplied
moveDown({bool notify = true}) → void
Move this node down one spot with respect to its siblings.
moveUp({bool notify = true}) → void
Move this node up one spot with respect to its siblings.
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
replaceWith(TreeNode<Object?> other, {bool notify = true}) → void
Replace this node by another node
toggle({bool notify = true}) → void
Toggle the expansion of this node in UI's.
toString() → String
A string representation of this object.
inherited
traverse(void action(TreeNode<Object?> node)) → void
Travels this node and all its descendants. Calling back action on each node hit.

Operators

operator ==(Object other) → bool
The equality operator.
inherited