Scrollbar class

A material design scrollbar.

A scrollbar indicates which portion of a Scrollable widget is actually visible.

Dynamically changes to an iOS style scrollbar that looks like CupertinoScrollbar on the iOS platform.

To add a scrollbar to a ScrollView, simply wrap the scroll view widget in a Scrollbar widget.

See also:

  • ListView, which display a linear, scrollable list of children.
  • GridView, which display a 2 dimensional, scrollable array of children.
Inheritance

Constructors

Scrollbar({Key key, @required Widget child, ScrollController controller, bool isAlwaysShown: false, double thickness, Radius radius})
Creates a material design scrollbar that wraps the given child. [...]
const

Properties

child Widget
The widget below this widget in the tree. [...]
final
controller ScrollController
The ScrollController used to implement Scrollbar dragging. [...]
final
hashCode int
The hash code for this object. [...]
@nonVirtual, read-only, inherited
isAlwaysShown bool
Indicates whether the Scrollbar should always be visible. [...]
final
key Key
Controls how one widget replaces another widget in the tree. [...]
final, inherited
radius Radius
The radius of the corners of the scrollbar. [...]
final
runtimeType Type
A representation of the runtime type of the object.
read-only, inherited
thickness double
The thickness of the scrollbar. [...]
final

Methods

createElement() StatefulElement
Creates a StatefulElement to manage this widget's location in the tree. [...]
inherited
createState() → _ScrollbarState
Creates the mutable state for this widget at a given location in the tree. [...]
override
debugDescribeChildren() List<DiagnosticsNode>
Returns a list of DiagnosticsNode objects describing this node's children. [...]
@protected, inherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void
Add additional properties associated with the node. [...]
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent 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
Returns 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. [...]
@nonVirtual, inherited