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
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 setterinherited
- key → Key?
-
Controls how one widget replaces another widget in the tree.
finalinherited
- modifierKey → Key?
-
The actual key of the widget, which Modifier wrapped
finalinherited
- onPressed → VoidCallback?
-
The callback that is called when this option is selected.
final
- padding → EdgeInsets?
-
The amount of space to surround the
childwith.final - runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
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
childparameter.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
-
modified(
) → Modifier -
Available on Widget, provided by the ModifierTransformer extension
Transform normal widget to Modifier -
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, int wrapWidth = 65}) → 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