RangeSlider class

Flutter-style range slider for selecting a start/end interval.

The RangeSlider displays two thumbs on a single track, allowing users to select a range of values. Press s to select the start thumb and e to select the end thumb when focused.

Like Slider, it supports mouse and keyboard interaction. Use divisions to snap values to discrete steps.

The slider is disabled when enabled is false or when onChanged is null.

Example:

RangeSlider(
  values: RangeValues(0.2, 0.8),
  min: 0.0,
  max: 1.0,
  divisions: 10,
  onChanged: (v) => print('range: ${v.start} - ${v.end}'),
)
Inheritance

Constructors

RangeSlider({required RangeValues values, ValueCmdCallback<RangeValues>? onChanged, double min = 0.0, double max = 1.0, int? divisions, int width = 28, bool enabled = true, Color? activeColor, Color? inactiveColor, Color? thumbColor, String rangeTrackChar = '=', String inactiveTrackChar = '-', String thumbChar = 'o', String? label, bool autofocus = false, String? focusId, FocusController? focusController, Key? key})

Properties

accessibilityLabel → String?
Optional accessibility label.
no setterinherited
accessibilityRole → String
Optional accessibility role.
no setterinherited
activeColor → Color?
final
autofocus → bool
final
children → List<Widget>
Child widgets that receive forwarded messages.
no setterinherited
debugRenderObjectPassthrough → bool
Whether this widget is intentionally transparent to render-object layouts.
no setterinherited
degradationSignal → WidgetDegradationSignal
Signal that controls this widget's render budget behavior.
no setterinherited
divisions → int?
final
enabled → bool
final
focusable → bool
Whether this widget can receive keyboard focus.
no setterinherited
focusController → FocusController?
final
focusId → String?
final
hashCode → int
The hash code for this object.
no setterinherited
id → String
Unique identifier for this widget.
no setterinherited
inactiveColor → Color?
final
inactiveTrackChar → String
final
key → Key?
Key for preserving widget identity.
finalinherited
label → String?
final
max → double
final
min → double
final
onChanged → ValueCmdCallback<RangeValues>?
final
rangeTrackChar → String
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
theme → Theme
Access the current theme.
no setterinherited
thumbChar → String
final
thumbColor → Color?
final
values → RangeValues
final
width → int
final

Methods

buildCachedView<T>(T builder(), Object? cacheKey) → T
Returns a cached view if the cache key matches.
inherited
createState() → State<StatefulWidget>
Creates the mutable State associated with this widget.
override
handleInit() → Cmd?
Override this instead of init for widget-specific initialization.
inherited
handleIntercept(Msg msg) → (Widget, Cmd?)
Override this to handle messages before they reach children.
inherited
handleUpdate(Msg msg) → (Widget, Cmd?)
Override this to handle messages specific to this widget.
inherited
init() → Cmd?
Called once when the widget is first mounted.
inherited
invalidateCachedView() → void
Clears any cached view for this widget.
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
shouldRenderAt(DegradationLevel degradationLevel, {required bool subtreeHasFocusedWidget}) → bool
Whether this widget should participate in the current render when degradationLevel is active.
inherited
toString() → String
A string representation of this object.
inherited
update(Msg msg) → (Model, Cmd?)
Handles messages by forwarding to children then calling handleUpdate.
inherited
view() → Object
Renders the widget to a string or View.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited