EmptyableContentBuilder<T> class

A builder handles blank content. It invokes emptyBuilder when value given is blank. Oherwise, builder will be used.

If is useful when content is nullable Or using ListView or similar with List that could be empty.

Inheritance

Constructors

EmptyableContentBuilder({Key? key, required T? content, EmptyChecker<T>? emptyChecker, WidgetBuilder? emptyBuilder, required ValueResultBuilder<T> builder}): Create the widget

builder → ValueResultBuilder<T>: Builder to be used when content isn't blank
final
content → T?: The given value
final
emptyBuilder → WidgetBuilder?: Builder to be used when content is blank
final
emptyChecker → EmptyChecker<T>: Function used to determine whether content is blank or not
final
hashCode → int: The hash code for this object.
no setterinherited
isValueBlank → bool: is content considered as blank or not
no setter
key → Key?: Controls how one widget replaces another widget in the tree.
finalinherited
runtimeType → Type: A representation of the runtime type of the object.
no setterinherited

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 nonexistent 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

defaultEmptyChecker(dynamic content) → bool: Default empty checker. It supports Emptyable List, Map, Iterable, String, by calling isEmpty on it. Otherwise, UnsupportedError is thrown.