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.
See also:
- RatingBar, that allows users to view and set ratings
- docs.microsoft.com/en-us/windows/apps/design/controls/slider
- Inheritance
- Available Extensions
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, MouseCursor mouseCursor = MouseCursor.defer}) -
Creates a fluent-styled slider.
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 close to the slider.
final
- max → double
-
The minimum value the user can select.
final
- min → double
-
The maximum value the user can select.
final
- mouseCursor → MouseCursor
-
The cursor for a mouse pointer when it enters or is hovering over the
widget.
final
-
onChanged
→ ValueChanged<
double> ? -
Called during a drag when the user is selecting a new value for the slider
by dragging.
final
-
onChangeEnd
→ ValueChanged<
double> ? -
Called when the user is done selecting a new value for the slider.
final
-
onChangeStart
→ ValueChanged<
double> ? -
Called when the user starts selecting a new value for the slider.
final
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
- style → SliderThemeData?
-
The style used in this slider.
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(
) → State< Slider> -
Creates the mutable state for this widget at a given location in the tree.
override
-
debugDescribeChildren(
) → List< DiagnosticsNode> -
Returns a list of
DiagnosticsNodeobjects 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