WidgetBuilderSelector class
WidgetBuilderSelector
is a convenience class that will one of two builder methods based on the output of a Stream<bool>
This is pretty handy if you want to react to state change like enable/disable in you ViewModel and update
the View accordingly.
In comparison to WidgetSelector
this is best used if the alternative child widgets are large so that you don't want to have them created
without using them.
- Inheritance
-
- Object
- DiagnosticableTree
- Widget
- StatefulWidget
- WidgetBuilderSelector
Constructors
-
WidgetBuilderSelector({required Stream<
bool> buildEvents, WidgetBuilder? onTrue, WidgetBuilder? onFalse, ErrorBuilder<String> ? errorBuilder, PlaceHolderBuilder? placeHolderBuilder, Key? key, bool? initialValue}) -
Creates a new WidgetBuilderSelector instance
stream
:Stream<bool>
that signals that the this Widget should be updatedonTrue
: builder that should be executed if an item with value true is receivedonFalse
: builder that should be executed if an item with value false is receivedconst
Properties
-
errorBuilder
→ ErrorBuilder<
String> ? -
final
- hashCode → int
-
The hash code for this object.
no setterinherited
- initialData → bool?
-
finalinherited
- key → Key?
-
Controls how one widget replaces another widget in the tree.
finalinherited
- onFalse → WidgetBuilder?
-
final
- onTrue → WidgetBuilder?
-
final
- placeHolderBuilder → PlaceHolderBuilder?
-
final
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
-
stream
→ Stream<
bool> -
finalinherited
Methods
-
build(
BuildContext context, bool data) → Widget -
createElement(
) → StatefulElement -
Creates a StatefulElement to manage this widget's location in the tree.
inherited
-
createState(
) → _ReactiveBaseWidgetState< bool> -
Creates the mutable state for this widget at a given 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
-
errorBuild(
BuildContext context, Object error) → Widget -
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
onFalseWidget(
BuildContext context) → Widget -
onTrueWidget(
BuildContext context) → Widget -
placeHolderBuild(
BuildContext context) → Widget -
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