SimpleDialogOption class Null safety
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.
SimpleDialogOption(
onPressed: () { Navigator.pop(context, Department.treasury); },
child: const Text('Treasury department'),
)
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
- SimpleDialogOption
Constructors
- SimpleDialogOption({Key? key, VoidCallback? onPressed, EdgeInsets? padding, Widget? child})
-
Creates an option for a SimpleDialog.
const
Properties
- child → Widget?
-
The widget below this widget in the tree.
final
- hashCode → int
- The hash code for this object.
- key → Key?
-
Controls how one widget replaces another widget in the tree.
finalinherited
- 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.
read-onlyinherited
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">@protectedinherited -
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">@nonVirtualinherited