Observer class

A StatelessObserverWidget that delegate its build method to builder.

See also:

Inheritance
Implemented types

Constructors

Observer({Key key, @required WidgetBuilder builder, String name})

Properties

builder WidgetBuilder
Called to obtain the child widget. [...]
final
debugConstructingStackFrame → String
The stack frame pointing to the source that constructed this instance.
final
hashCode → int
The hash code for this object.
read-only, inherited
key Key
Controls how one widget replaces another widget in the tree.
final, inherited
runtimeType → Type
A representation of the runtime type of the object.
read-only, inherited

Methods

build(BuildContext context) Widget
Describes the part of the user interface represented by this widget. [...]
override
getName() → String
An identifiable name that can be overriden for debugging.
override
createElement() StatelessObserverElement
Creates a StatelessElement to manage this widget's location in the tree. [...]
inherited
createReaction(dynamic onInvalidate(), {dynamic onError(Object, Reaction)}) Reaction
A convenience method used for testing.
@visibleForTesting, inherited
debugDescribeChildren() → List<DiagnosticsNode>
Returns a list of DiagnosticsNode objects describing this node's children.
@protected, inherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void
Add additional properties associated with the node.
inherited
getContext() ReactiveContext
The context within which its reaction should be run. It is the mainContext in most cases.
inherited
log(String msg) → void
Convenience method to output console messages as debugging output. Logging usually happens when some internal error needs to be surfaced to the user.
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.debug}) → String
Returns 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 ==(dynamic other) → bool
The equality operator.
inherited

Static Methods

debugFindConstructingStackFrame([StackTrace stackTrace]) → String
Finds the first non-constructor frame in the stack trace. [...]
@visibleForTesting