Slider class

A slider is a control that lets the user select from a range of values by moving a thumb control along a track.

A slider is a good choice when you know that users think of the value as a relative quantity, not a numeric value. For example, users think about setting their audio volume to low or medium—not about setting the value to 2 or 5.

Slider Preview

See also:

Inheritance

Constructors

Slider({Key? key, required double value, required ValueChanged<double>? onChanged, ValueChanged<double>? onChangeStart, ValueChanged<double>? onChangeEnd, double min = 0.0, double max = 100.0, int? divisions, SliderThemeData? style, String? label, FocusNode? focusNode, bool vertical = false, bool autofocus = false})
const

Properties

autofocus → bool
True if this widget will be selected as the initial focus when no other node in its scope is currently focused.
final
divisions → int?
The number of discrete divisions.
final
focusNode → FocusNode?
An optional focus node to use as the focus node 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
label → String?
A label to show above the slider, or at the left of the slider if vertical is true when the slider is active.
final
max → double
The minimum value the user can select.
final
min → double
The maximum value the user can select.
final
onChanged → ValueChanged<double>?
final
onChangeEnd → ValueChanged<double>?
final
onChangeStart → ValueChanged<double>?
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
style → SliderThemeData?
The style used in this slider. It's mescled with ThemeData.sliderThemeData
final
value → double
The currently selected value for this slider.
final
vertical → bool
Whether the slider is vertical or not
final

Methods

createElement() → StatefulElement
Creates a StatefulElement to manage this widget's location in the tree.
inherited
createState() → _SliderState
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.
override
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