SliderComponentShape class Null safety

Base class for slider thumb, thumb overlay, and value indicator shapes.

Create a subclass of this if you would like a custom shape.

All shapes are painted to the same canvas and ordering is important. The overlay is painted first, then the value indicator, then the thumb.

The thumb painting can be skipped by specifying noThumb for SliderThemeData.thumbShape.

The overlay painting can be skipped by specifying noOverlay for SliderThemeData.overlayShape.

See also:



This abstract const constructor enables subclasses to provide const constructors so that they can be used in const expressions.


hashCode int
The hash code for this object.
read-only, inherited
runtimeType Type
A representation of the runtime type of the object.
read-only, inherited


getPreferredSize(bool isEnabled, bool isDiscrete) Size
Returns the preferred size of the shape, based on the given conditions.
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed.
paint(PaintingContext context, Offset center, {required Animation<double> activationAnimation, required Animation<double> enableAnimation, required bool isDiscrete, required TextPainter labelPainter, required RenderBox parentBox, required SliderThemeData sliderTheme, required TextDirection textDirection, required double value, required double textScaleFactor, required Size sizeWithOverflow}) → void
Paints the shape, taking into account the state passed to it.
toString() String
A string representation of this object.


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

Static Properties

noOverlay SliderComponentShape
Special instance of SliderComponentShape to skip the overlay drawing.
noThumb SliderComponentShape
Special instance of SliderComponentShape to skip the thumb drawing.