SimpleDialogOptionModifier class

An option used in a SimpleDialog.

A simple dialog offers the user a choice between several options. This widget is commonly used to represent each of the options. If the user selects this option, the widget will call the onPressed callback, which typically uses Navigator.pop to close the dialog.

The padding on a SimpleDialogOption is configured to combine with the default SimpleDialog.contentPadding so that each option ends up 8 pixels from the other vertically, with 20 pixels of spacing between the dialog's title and the first option, and 24 pixels of spacing between the last option and the bottom of the dialog.

{@tool snippet}

SimpleDialogOption(
  onPressed: () { Navigator.pop(context, Department.treasury); },
  child: const Text('Treasury department'),
)

{@end-tool}

See also:

• SimpleDialog, for a dialog in which to use this widget.
• showDialog, which actually displays the dialog and returns its result.
• TextButton, which are commonly used as actions in other kinds of dialogs, such as AlertDialogs.
• material.io/design/components/dialogs.html#simple-dialog

Inheritance

• Object
• DiagnosticableTree
• Widget
• StatelessWidget
• SingleChildStatelessModifier
• SimpleDialogOptionModifier

Available extensions

• ModifierTransformer

Constructors

SimpleDialogOptionModifier({Key? key, Widget? child, Key? modifierKey, VoidCallback? onPressed, EdgeInsets? padding})

Creates an option for a SimpleDialog.

const

Properties

hashCode → int

The hash code for this object.

no setter, inherited

key → Key?

Controls how one widget replaces another widget in the tree.

final, inherited

modifierKey → Key?

The actual key of the widget, which Modifier wrapped

final, inherited

onPressed → VoidCallback?

The callback that is called when this option is selected.

final

padding → EdgeInsets?

The amount of space to surround the child with.

final

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

build(BuildContext context) → Widget

Describes the part of the user interface represented by this widget.

inherited

buildWithChild(BuildContext context, Widget? child) → Widget

A build method that receives an extra child parameter.

override

createElement() → SingleChildStatelessElement

Create a SingleChildStatelessElement

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

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent 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.

inherited