Slider

A Slider allows users to select a numeric value or range by dragging a thumb along a track. It provides an efficient way to adjust values within a defined range, such as price, volume, or time.

Use this component when users need to make quick, approximate selections from a continuous or discrete range.

Common alternative names:
Range Input, Range Slider

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Variants

Single Value Slider

A slider for selecting a single value from a range.

Preview

Code

DragSlider(
  value: _value,
  onChanged: (value) => setState(() => _value = value),
)

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Range Slider

A slider for selecting a range of values with two thumbs.

Preview

Code

DragRangeSlider(
  values: _dragRangeSlider,
  onChanged: (value) => setState(() => _dragRangeSlider = value),
)

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Properties

DragSlider

Property	Type	Description
value	double	The current value of the slider.
onChanged	void Function(double)?	Callback function when the slider value changes.
onChangeStart	void Function(double)?	Callback function when the user starts changing the slider value.
onChangeEnd	void Function(double)?	Callback function when the user finishes changing the slider value.
min	double	The minimum value of the slider range.
max	double	The maximum value of the slider range.
thumbRadius	double	The radius of the slider thumb in logical pixels.
trackHeight	double	The height of the slider track in logical pixels.
divisions	int?	The number of discrete divisions on the slider track.
activeColor	Color?	The color of the active portion of the slider track.
inactiveColor	Color?	The color of the inactive portion of the slider track.
secondaryActiveColor	Color?	The color of the secondary active track (used for additional visual feedback).
thumbColor	Color?	The color of the slider thumb.
overlayColor	WidgetStateProperty<Color?>?	The color of the overlay that appears when the slider is pressed.
mouseCursor	MouseCursor?	The cursor to display when hovering over the slider.
focusNode	FocusNode?	The focus node for keyboard navigation.
autofocus	bool	Whether the slider should automatically gain focus when the widget is built.
allowedInteraction	SliderInteraction?	The types of interaction allowed for the slider.
padding	EdgeInsetsGeometry?	The padding around the slider.

DragRangeSlider

Property	Type	Description
values	RangeValues	The current values of the range slider (start and end values).
onChanged	void Function(RangeValues)?	Callback function when the slider range values change.
onChangeStart	void Function(RangeValues)?	Callback function when the user starts changing the slider range values.
onChangeEnd	void Function(RangeValues)?	Callback function when the user finishes changing the slider range values.
min	double	The minimum value of the slider range. Defaults to 0.
max	double	The maximum value of the slider range. Defaults to 100.
thumbRadius	double	The radius of the slider thumbs in logical pixels. Defaults to 8.
trackHeight	double	The height of the slider track in logical pixels. Defaults to 4.
divisions	int?	The number of discrete divisions on the slider track.
activeColor	Color?	The color of the active portion of the slider track (between the two thumbs).
inactiveColor	Color?	The color of the inactive portions of the slider track.
overlayColor	WidgetStateProperty<Color?>?	The color of the overlay that appears when the slider thumbs are pressed.