VxConditional class

Runs a WidgetBuilder's result if the condition is true.

When condition is true the builder is run. If false and fallback is not null, fallback is run. If fallback is null and condition is false, an empty Container is rendered.

Example:

VxConditional(
 condition: true,
builder: (context) {
   return Text('This gets rendered');
 },
)

VxConditional(
 condition: false,
 builder: (context) {
   return Text('This does not get rendered, an empty offstage will be rendered');
 },
)

VxConditional(
 condition: false,
 builder: (context) {
   return Text('This does not get rendered, as fallback is not null, it is used to render the fallback widget.');
 },
 fallback: (context) {
   return Text('This gets rendered');
 }
)
Inheritance
Available Extensions

Constructors

VxConditional({Key key, @required bool condition, @required WidgetBuilder builder, WidgetBuilder fallback})
const

Properties

builder WidgetBuilder
Run if condition is true.
final
condition bool
Condition to control what gets rendered.
final
fallback WidgetBuilder
Run if condition is false and it is not null.
final
hashCode int
The hash code for this object. [...]
@nonVirtual, 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
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. [...]
@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.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. [...]
@nonVirtual, inherited