MathField class

Widget that is like a TextField for math expressions.

Instead of launching a software keyboard, it will launch a custom keyboard UI in an OverlayEntry.

Inheritance

Constructors

MathField({Key? key, bool autofocus = false, FocusNode? focusNode, MathFieldEditingController? controller, MathKeyboardType keyboardType = MathKeyboardType.expression, List<String> variables = const ['x'], InputDecoration decoration = const InputDecoration(), void onChanged(String value)?, ValueChanged<String>? onSubmitted, bool opensKeyboard = true})
Constructs a MathField widget.
const

Properties

autofocus bool
Whether this math field should focus itself if nothing else is already focused.
final
controller MathFieldEditingController?
The controller for the math field.
final
decoration InputDecoration
The decoration to show around the math field.
final
focusNode FocusNode?
Defines the keyboard focus for this widget.
final
hashCode int
The hash code for this object.
no setterinherited
key Key?
Controls how one widget replaces another widget in the tree.
finalinherited
keyboardType MathKeyboardType
The keyboard type.
final
onChanged → (void Function(String value)?)
Function that is called when the expression inside of the math field changes,
final
onSubmitted ValueChanged<String>?
Called when the user indicates that they are done with editing the math field.
final
opensKeyboard bool
Whether the field should open a keyboard on focus by itself or not.
final
runtimeType Type
A representation of the runtime type of the object.
no setterinherited
variables List<String>
The additional variables a user can use.
final

Methods

createElement() StatefulElement
Creates a StatefulElement to manage this widget's location in the tree.
inherited
createState() → _MathFieldState
Creates the mutable state for this widget at a given location in the tree.
override
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