Node<T> class

Defines the data used to display a TreeNode.

This object allows the creation of key, label and icon to display a node on the TreeView widget. The key and label properties are required. The key is needed for events that occur on the generated TreeNode. It should always be unique.

Constructors

Node({required String key, required String label, List<Node> children = const [], bool expanded = false, bool parent = false, IconData? icon, Color? iconColor, Color? selectedIconColor, T? data}): const

Properties

asMap → Map<String, dynamic>: Map representation of this object
no setter
children → List<Node>: The sub Nodes of this object.
final
data → T?: Generic data model that can be assigned to the TreeNode. This makes it useful to assign and retrieve data associated with the TreeNode
final
expanded → bool: The open or closed state of the TreeNode. Applicable only if the node is a parent
final
hasData → bool: Whether this object has data associated with it.
no setter
hashCode → int: The hash code for this object.
no setteroverride
hasIcon → bool: Whether this object has a non-null icon.
no setter
icon → IconData?: An optional icon that is displayed on the TreeNode.
final
iconColor → Color?: An optional color that will be applied to the icon for this node.
final
isParent → bool: Whether this object has children Node.
no setter
key → String: The unique string that identifies this object.
final
label → String: The string value that is displayed on the TreeNode.
final
parent → bool: Force the node to be a parent so that node can show expander without having children node.
final
runtimeType → Type: A representation of the runtime type of the object.
no setterinherited
selectedIconColor → Color?: An optional color that will be applied to the icon when this node is selected.
final

Methods

copyWith({String? key, String? label, List<Node>? children, bool? expanded, bool? parent, IconData? icon, Color? iconColor, Color? selectedIconColor, T? data}) → Node<T>: Creates a copy of this object but with the given fields replaced with the new values.
noSuchMethod(Invocation invocation) → dynamic: Invoked when a nonexistent method or property is accessed.
inherited
toString() → String: A string representation of this object.
override

Operators

operator ==(Object other) → bool: The equality operator.
override

Static Methods

fromLabel<T>(String label) → Node<T>: Creates a Node from a string value. It generates a unique key.
fromMap<T>(Map<String, dynamic> map) → Node<T>: Creates a Node from a Map<String, dynamic> map. The map should contain a "label" value. If the key value is missing, it generates a unique key. If the expanded value, if present, can be any 'truthful' value. Excepted values include: 1, yes, true and their associated string values.