HorizontalProgressBar class

The class HorizontalProgressBar is used to create a horizontal progress bar. The required parameters of the HorizontalProgressBar are: maxValue, currentPosition, and onChanged.

Use of HorizontalProgressBar

HorizontalProgressBar(
  maxValue: 10,
  // [currentPosition] should be declared before its uses
  currentPosition: currentPosition,
  onChanged: (val) {
    setState(() {
      currentPosition = val;
    });
  },
)

Notes:

  • Uses / for smooth decimal precision (instead of integer division ~/).
  • Clamps positions to prevent overflow of thumb or buffered area.
  • Stores last drag value to use in onChangeEnd without errors.
  • Validation moved to constructor for better error reporting.
Inheritance

Constructors

HorizontalProgressBar({Key? key, required double maxValue, required double currentPosition, required ValueChanged<double> onChanged, double? width, double? bufferedPosition, ValueChanged<double>? onChangeStart, ValueChanged<double>? onChangeEnd, Color bufferedColor = Colors.grey, Color progressColor = Colors.blue, Color thumbColor = const Color.fromRGBO(13, 71, 161, 1), double thumbDiameter = 15, double trackHeight = 10, double enabledHeight = 10, bool isThumbVisible = true})
const

Properties

bufferedColor → Color
bufferedColor sets buffered area color.
final
bufferedPosition → double?
bufferedPosition sets the buffer position.
final
currentPosition → double
currentPosition Represents the progressbar's current position.
final
enabledHeight → double
enabledHeight sets the height of the progressbar.
final
hashCode → int
The hash code for this object.
no setterinherited
isThumbVisible → bool
isThumbVisible sets whether the thumb is visible or not.
final
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
maxValue → double
maxValue represents the maximum value of the progress bar, the value ranges from 0 to maxValue.
final
onChanged → ValueChanged<double>
onChanged Callback function. Called whenever the progressbar's current value gets changed.
final
onChangeEnd → ValueChanged<double>?
onChangeEnd Callback function. Called whenever the progressbar's current value change ends. It is only called when the progressbar is dragged.
final
onChangeStart → ValueChanged<double>?
onChangeStart Callback function. Called whenever the progressbar's current value starts to be changed. It is only called when the progressbar is dragged.
final
progressColor → Color
progressColor Progress area color.
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
thumbColor → Color
thumbColor sets the color of the thumb.
final
thumbDiameter → double
thumbDiameter the diameter of the thumb.
final
trackHeight → double
trackHeight height of the progress and buffered track.
final
width → double?
width sets the width of the progress bar.
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.
inherited
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