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({Stream<
bool> buildEvents, Widget onTrue, Widget onFalse, Key key }) -
Creates a new WidgetSelector instance
buildEvents
: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 true is receivedconst
Properties
-
buildEvents
→ Stream<
bool> -
final
- onFalse → Widget
-
final
- onTrue → Widget
-
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. [...]
-
createElement(
) → StatelessElement -
Creates a
StatelessElement
to manage this widget's location in the tree. [...]inherited -
debugFillProperties(
DiagnosticPropertiesBuilder properties) → void -
inherited
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a non-existent method or property is accessed. [...]
@pragma("vm:entry-point"), inherited
-
toString(
) → String -
Returns a string representation of this object.
inherited
-
toStringShort(
) → String -
A short, textual description of this widget.
inherited
Operators
-
operator ==(
dynamic other) → bool -
The equality operator. [...]
inherited