ScrollIncrementType enum Null safety

Describes the type of scroll increment that will be performed by a ScrollAction on a Scrollable.

This is used to configure a ScrollIncrementDetails object to pass to a ScrollIncrementCalculator function on a Scrollable.

This indicates the intent of the scroll, not necessarily the size. Not all scrollable areas will have the concept of a "line" or "page", but they can respond to the different standard key bindings that cause scrolling, which are bound to keys that people use to indicate a "line" scroll (e.g. control-arrowDown keys) or a "page" scroll (e.g. pageDown key). It is recommended that at least the relative magnitudes of the scrolls match expectations.

Inheritance

Constructors

ScrollIncrementType()
const

Values

line → const ScrollIncrementType

Indicates that the ScrollIncrementCalculator should return the scroll distance it should move when the user requests to scroll by a "line".

The distance a "line" scrolls refers to what should happen when the key binding for "scroll down/up by a line" is triggered. It's up to the ScrollIncrementCalculator function to decide what that means for a particular scrollable.

ScrollIncrementType()
page → const ScrollIncrementType

Indicates that the ScrollIncrementCalculator should return the scroll distance it should move when the user requests to scroll by a "page".

The distance a "page" scrolls refers to what should happen when the key binding for "scroll down/up by a page" is triggered. It's up to the ScrollIncrementCalculator function to decide what that means for a particular scrollable.

ScrollIncrementType()

Properties

hashCode → int
The hash code for this object.
read-onlyinherited
index → int
A numeric identifier for the enumerated value.
read-onlyinherited
runtimeType → Type
A representation of the runtime type of the object.
read-onlyinherited

Methods

noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed.
inherited
toString() → String
A string representation of this object.
inherited

Operators

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

Constants

values → const List<ScrollIncrementType>
A constant List of the values in this enum, in order of their declaration.
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