FSlider class

An input where the user selects a value from within a given range.

A slider is a form field and therefore can be used within a Form widget.

See:

Inheritance

Constructors

FSlider({required FSliderController controller, FSliderStyle? style, FLayout? layout, Widget? label, Widget? description, Widget errorBuilder(BuildContext, String) = _errorBuilder, List<FSliderMark> marks = const [], double? trackMainAxisExtent, double? trackHitRegionCrossExtent, Widget tooltipBuilder(FTooltipStyle, double) = _tooltipBuilder, String semanticValueFormatterCallback(double) = _semanticValueFormatter, String semanticFormatterCallback(FSliderSelection)?, FormFieldSetter<FSliderSelection>? onSaved, FormFieldValidator<FSliderSelection>? validator, String? forceErrorText, bool enabled = true, AutovalidateMode? autovalidateMode, Key? key})
Creates a FSlider.

Properties

autovalidateMode AutovalidateMode?
Used to enable/disable this form field auto validation and update its error text.
final
controller FSliderController
The controller.
final
description Widget?
The description.
final
enabled bool
True if the slider is enabled.
final
errorBuilder Widget Function(BuildContext, String)
The builder for errors displayed below the description. Defaults to displaying the error message.
final
forceErrorText String?
An optional property that forces the FormFieldState into an error state by directly setting the FormFieldState.errorText property without running the validator function.
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 Widget?
The label.
final
layout FLayout?
The layout. Defaults to the current TextDirection.
final
marks List<FSliderMark>
The marks.
final
onSaved FormFieldSetter<FSliderSelection>?
An optional method to call with the final value when the form is saved via FormState.save.
final
runtimeType Type
A representation of the runtime type of the object.
no setterinherited
semanticFormatterCallback String Function(FSliderSelection)
A callback that formats the semantic label for the slider. Defaults to announcing the percentages the active track occupies.
final
semanticValueFormatterCallback String Function(double)
A callback that formats the semantic label for the slider's thumb. Defaults to announcing the percentage.
final
style FSliderStyle?
The style.
final
tooltipBuilder Widget Function(FTooltipStyle, double)
A builder that creates the tooltip. Defaults to printing the current percentage.
final
trackHitRegionCrossExtent double?
The extent of the track's hit region in the cross-axis direction.
final
trackMainAxisExtent double?
The extent of the track along the main axis. Defaults to occupying the maximum amount of space possible along the main axis.
final
validator FormFieldValidator<FSliderSelection>?
An optional method that validates an input. Returns an error string to display if the input is invalid, or null otherwise.
final

Methods

build(BuildContext context) Widget
Describes the part of the user interface represented by this widget.
override
createElement() StatelessElement
Creates a StatelessElement to manage this widget's location in the tree.
inherited
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, int wrapWidth = 65}) 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