WidgetSelector class
WidgetSelector
is a convenience class that will return one of two Widgets 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.
If you don't need builders for the alternative child widgets this class offers a more concise expression than WidgetBuilderSelector
Constructors
-
WidgetSelector({Key key, Stream<
bool> buildEvents, Widget onTrue, Widget onFalse, ErrorBuilder<String> errorBuilder, PlaceHolderBuilder placeHolderBuilder, bool initialValue }) -
Creates a new WidgetSelector instance
stream
:Stream<bool>
that signals that the this Widget should be updatedonTrue
: Widget that should be returned if an item with value true is receivedonFalse
: Widget that should be returned if an item with value false is receivedconst
Properties
-
errorBuilder
→ ErrorBuilder<
String> -
final
- onFalse → Widget
-
final
- onTrue → Widget
-
final
- placeHolderBuilder → PlaceHolderBuilder
-
final
- hashCode → int
-
The hash code for this object. [...]
read-only, inherited
- initialData → bool
-
final, 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
-
stream
→ Stream<
bool> -
final, inherited
Methods
-
build(
BuildContext context, bool data) → Widget -
errorBuild(
BuildContext context, Object error) → Widget -
placeHolderBuild(
BuildContext context) → Widget -
createElement(
) → StatefulElement -
Creates a
StatefulElement
to manage this widget's location in the tree. [...]inherited -
createState(
) → _ReactiveWidgetState< 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. [...]@protected, 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.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