TTableCellScope class

Provides the active cell notifier and cell error resolution to editable cell descendants.

TTableCellScope is an InheritedNotifier that wraps a ValueNotifier<String?> tracking which cell is currently in edit mode, and provides cell-level error lookup for validation in tables. Only widgets that call TTableCellScope.of or TTableCellScope.maybeOf will subscribe and rebuild when the active cell or errors change — non-editable cells and rows are completely unaffected.

This is deliberately separate from TTableScope so that activating a cell does not trigger a full TTableScope subtree notification.

Inheritance
Available extensions

Constructors

TTableCellScope({Key? key, required ValueNotifier<String?> activeCellNotifier, String? cellErrorBuilder(dynamic data, String column)?, Map<String, String>? cellErrors, ValueListenable<Map<String, String>>? errorsNotifier, required Widget child})
Creates a cell scope.

Properties

activeCellNotifier → ValueNotifier<String?>
The active cell notifier tracking which cell is in edit mode.
final
cellErrorBuilder → String? Function(dynamic data, String column)?
Optional builder function to extract an error message for a given row item and column.
final
cellErrors → Map<String, String>?
Optional static map of cell errors keyed by cell key (e.g. "${itemKey}_$column" or "$column").
final
child → Widget
The widget below this widget in the tree.
finalinherited
errorsNotifier → ValueListenable<Map<String, String>>?
Optional notifier for dynamic cell errors.
final
hashCode → int
The hash code for this object.
no setterinherited
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
notifier → Listenable?
The Listenable object to which to listen.
finalinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited

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() → InheritedElement
Inflates this configuration to a concrete instance.
inherited
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.
getError(dynamic data, String column, [String? cellKey]) → String?
Resolves the error message for a specific cell, if any.
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
updateShouldNotify(covariant InheritedNotifier<Listenable> oldWidget) → bool
Whether the framework should notify widgets that inherit from 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

Static Methods

cellErrorOf(BuildContext context, dynamic data, String column, [String? cellKey]) → String?
Static helper to resolve an error for a cell from the nearest TTableCellScope.
maybeOf(BuildContext context) → ValueNotifier<String?>?
Returns the active-cell notifier for the nearest TTableCellScope, or null if no editable table is in scope.
maybeScopeOf(BuildContext context) → TTableCellScope?
Returns the nearest TTableCellScope, or null if none is in scope.
of(BuildContext context) → ValueNotifier<String?>
Returns the active-cell notifier for the nearest TTableCellScope.