ConditionalParentWidget class Null safety

Conditionally wrap a subtree with a parent widget without breaking the code tree.

condition: the condition depending on which the subtree child is wrapped with the parent. child: The subtree that should always be build. conditionalBuilder: builds the parent with the subtree child.

Usage:

return ConditionalParentWidget(
  condition: shouldIncludeParent,
  child: Widget1(
    child: Widget2(
      child: Widget3(),
    ),
  ),
  conditionalBuilder: (Widget child) => SomeParentWidget(child: child),
);

Instead of:

Widget child = Widget1(
  child: Widget2(
    child: Widget3(),
  ),
);

return shouldIncludeParent ? SomeParentWidget(child: child) : child;
Inheritance

Constructors

ConditionalParentWidget({Key? key, required bool condition, required Widget child, required Widget conditionalBuilder(Widget child)})
const

Properties

child → Widget
final
condition → bool
final
conditionalBuilder → Widget Function(Widget child)
final
hashCode → int
The hash code for this object.
read-onlyinherited
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
runtimeType → Type
A representation of the runtime type of the object.
read-onlyinherited

Methods

build(BuildContext context) → Widget
Describes the part of the user interface represented by this widget.
override
createElement() → StatelessElement
Creates a StatelessElement to manage this widget's location in the tree.
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
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed.
inherited
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}) → 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

Operators

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