ScrollbarModifier constructor
const
ScrollbarModifier({
- Key? key,
- Widget? child,
- Key? modifierKey,
- ScrollController? controller,
- bool? thumbVisibility,
- bool? trackVisibility,
- double? thickness,
- Radius? radius,
- ScrollNotificationPredicate? notificationPredicate,
- bool? interactive,
- ScrollbarOrientation? scrollbarOrientation,
- @Deprecated('Use thumbVisibility instead. ' 'This feature was deprecated after v2.9.0-1.0.pre.') bool? isAlwaysShown,
- @Deprecated('Use ScrollbarThemeData.trackVisibility to resolve based on the current state instead. ' 'This feature was deprecated after v2.9.0-1.0.pre.') bool? showTrackOnHover,
- @Deprecated('Use ScrollbarThemeData.thickness to resolve based on the current state instead. ' 'This feature was deprecated after v2.9.0-1.0.pre.') double? hoverThickness,
Creates a Material Design scrollbar that by default will connect to the
closest Scrollable descendant of child
.
The child
should be a source of ScrollNotification notifications,
typically a Scrollable widget.
If the controller
is null, the default behavior is to
enable scrollbar dragging using the PrimaryScrollController.
When null, thickness
defaults to 8.0 pixels on desktop and web, and 4.0
pixels when on mobile platforms. A null radius
will result in a default
of an 8.0 pixel circular radius about the corners of the scrollbar thumb,
except for when executing on TargetPlatform.android, which will render the
thumb without a radius.
Implementation
const ScrollbarModifier({
super.key,
super.child,
super.modifierKey,
this.controller,
this.thumbVisibility,
this.trackVisibility,
this.thickness,
this.radius,
this.notificationPredicate,
this.interactive,
this.scrollbarOrientation,
@Deprecated(
'Use thumbVisibility instead. '
'This feature was deprecated after v2.9.0-1.0.pre.',
)
this.isAlwaysShown,
@Deprecated(
'Use ScrollbarThemeData.trackVisibility to resolve based on the current state instead. '
'This feature was deprecated after v2.9.0-1.0.pre.',
)
this.showTrackOnHover,
@Deprecated(
'Use ScrollbarThemeData.thickness to resolve based on the current state instead. '
'This feature was deprecated after v2.9.0-1.0.pre.',
)
this.hoverThickness,
});