TTreeView<T> class

An interactive hierarchical tree widget supporting single/multi-selection, tri-state checkboxes, search filtering with auto-expansion, connecting lines, and async child node loading.

Inheritance
Available extensions

Constructors

TTreeView({Key? key, required List<TTreeNode<T>> nodes, TTreeSelectionMode selectionMode = TTreeSelectionMode.single, Set<String>? selectedKeys, Set<String>? expandedKeys, ValueChanged<Set<String>>? onSelectionChanged, ValueChanged<TTreeNode<T>>? onNodeTap, void onNodeExpanded(TTreeNode<T> node, bool isExpanded)?, FutureOr<List<TTreeNode<T>>> onLoadChildren(TTreeNode<T> node)?, bool showConnectingLines = true, String? searchQuery, double indentWidth = 24.0, Widget nodeBuilder(BuildContext context, TTreeNode<T> node, bool isExpanded, bool isSelected)?})
const

Properties

expandedKeys → Set<String>?
Currently expanded keys.
final
hashCode → int
The hash code for this object.
no setterinherited
indentWidth → double
Indentation width per tree depth level.
final
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
nodeBuilder → Widget Function(BuildContext context, TTreeNode<T> node, bool isExpanded, bool isSelected)?
Custom node content builder.
final
nodes → List<TTreeNode<T>>
Root nodes to display.
final
onLoadChildren → FutureOr<List<TTreeNode<T>>> Function(TTreeNode<T> node)?
Async callback to load child nodes on expand.
final
onNodeExpanded → void Function(TTreeNode<T> node, bool isExpanded)?
Callback fired when a node is expanded or collapsed.
final
onNodeTap → ValueChanged<TTreeNode<T>>?
Callback fired when a node is clicked.
final
onSelectionChanged → ValueChanged<Set<String>>?
Callback fired when node selection changes.
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
searchQuery → String?
Optional query to filter nodes by label. Matches auto-expand parent branches.
final
selectedKeys → Set<String>?
Currently selected keys.
final
selectionMode → TTreeSelectionMode
Selection mode (none, single, or multi).
final
showConnectingLines → bool
Whether to render connecting tree branch lines.
final

Methods

box({double minW = 0.0, double minH = 0.0, double maxW = double.infinity, double maxH = double.infinity}) → Widget

Available on Widget, provided by the WidgetX extension

Wraps this widget in a ConstrainedBox to apply layout constraints.
center({bool when = true}) → Widget

Available on Widget, provided by the WidgetX extension

Wraps this widget in a Center widget.
createElement() → StatefulElement
Creates a StatefulElement to manage this widget's location in the tree.
inherited
createState() → State<TTreeView<T>>
Creates the mutable state for this widget at a given location in the tree.
override
debugDescribeChildren() → List<DiagnosticsNode>
Returns a list of DiagnosticsNode objects describing this node's children.
inherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void
Add additional properties associated with the node.
inherited
expanded({int flex = 1}) → Widget

Available on Widget, provided by the WidgetX extension

Wraps this widget in an Expanded widget.
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
padding([double left = 0.0, double top = 0.0, double right = 0.0, double bottom = 0.0]) → Widget

Available on Widget, provided by the WidgetX extension

Wraps this widget in a Padding with flexible edge control.
paddingSymmetric({double h = 0.0, double v = 0.0}) → Widget

Available on Widget, provided by the WidgetX extension

Wraps this widget in a Padding with symmetric horizontal and vertical spacing.
size({double? w, double? h}) → Widget

Available on Widget, provided by the WidgetX extension

Wraps this widget in a SizedBox to apply fixed width and/or height.
toDiagnosticsNode({String? name, DiagnosticsTreeStyle? style}) → DiagnosticsNode
Returns a debug representation of the object that is used by debugging tools and by DiagnosticsNode.toStringDeep.
inherited
toString({DiagnosticLevel minLevel = DiagnosticLevel.info}) → String
A string representation of this object.
inherited
toStringDeep({String prefixLineOne = '', String? prefixOtherLines, DiagnosticLevel minLevel = DiagnosticLevel.debug, int wrapWidth = 65}) → String
Returns a string representation of this node and its descendants.
inherited
toStringShallow({String joiner = ', ', DiagnosticLevel minLevel = DiagnosticLevel.debug}) → String
Returns a one-line detailed description of the object.
inherited
toStringShort() → String
A short, textual description of this widget.
inherited
visible(bool visible, {bool maintainState = false}) → Widget

Available on Widget, provided by the WidgetX extension

Wraps this widget in a Visibility widget.
when(bool condition) → Widget

Available on Widget, provided by the WidgetX extension

Returns this widget if condition is true, otherwise returns SizedBox.shrink(). Usage: Text('Hello').when(isVisible)

Operators

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