ScrollWrapper class Null safety

Wrap the widget to show a scroll to top prompt over when a certain scroll offset is reached.

Inheritance

Constructors

ScrollWrapper({Key? key, required ScrollBuilder builder, ScrollController? scrollController, Axis scrollDirection = Axis.vertical, bool? primary, bool reverse = false, VoidCallback? onPromptTap, double scrollOffsetUntilVisible = 200, double scrollOffsetUntilHide = 200, double enabledAtOffset = 500, bool alwaysVisibleAtOffset = false, Curve scrollToTopCurve = Curves.fastOutSlowIn, Duration scrollToTopDuration = const Duration(milliseconds: 500), Duration promptDuration = const Duration(milliseconds: 500), Curve promptAnimationCurve = Curves.fastOutSlowIn, Alignment? promptAlignment, PromptButtonTheme? promptTheme, PromptAnimation promptAnimationType = PromptAnimation.size, ReplacementBuilder? promptReplacementBuilder})
const

Properties

alwaysVisibleAtOffset bool
If the prompt is to be always visible at the provided offset. Setting this to false only shows the prompt when the user starts scrolling upwards. Default value is false.
final
builder ScrollBuilder
The widget to show the prompt over when scroll is at an offset.
final
enabledAtOffset double
At what scroll offset to enable the prompt on.
final
hashCode int
The hash code for this object.
read-onlyinherited
key Key?
Controls how one widget replaces another widget in the tree.
finalinherited
onPromptTap VoidCallback?
Callback function to be executed when the prompt is tapped.
final
primary bool
Whether this is wrapped around a primary scroll view associated with the parent PrimaryScrollController. Defaults to true when scrollDirection is Axis.vertical and controller is null.
final
promptAlignment Alignment?
Where on the widget to align the prompt.
final
promptAnimationCurve Curve
Animation Curve that the prompt will follow when coming into view.
final
promptAnimationType PromptAnimation
PromptAnimation type that the prompt will follow when coming into view. Default is PromptAnimation.size.
final
promptDuration Duration
Duration it takes for the prompt to come into view/vanish.
final
promptReplacementBuilder ReplacementBuilder?
Replace the prompt button with your own custom widget. Returns the BuildContext and the Function to call to scroll to top.
final
promptTheme PromptButtonTheme?
Modify the prompt theme by providing a custom PromptButtonTheme.
final
reverse bool
Whether the scroll view scrolls in the reading direction.
final
runtimeType Type
A representation of the runtime type of the object.
read-onlyinherited
scrollController ScrollController?
ScrollController of the scrollable widget to scroll to the top of when the prompt is pressed.
final
scrollDirection Axis
The axis along which the scroll view scrolls.
final
scrollOffsetUntilHide double
If alwaysVisibleAtOffset is false, at what offset should the user scroll before the prompt hides itself, if visible.
final
scrollOffsetUntilVisible double
If alwaysVisibleAtOffset is false, what offset should the user scroll in the opposite direction (ex, upwards scroll on a non-reversed vertical ScrollView) before the prompt becomes visible.
final
scrollToTopCurve Curve
Animation Curve for scrolling to the top.
final
scrollToTopDuration Duration
Duration it takes for the page to scroll to the top on prompt button press.
final

Methods

createElement() StatefulElement
Creates a StatefulElement to manage this widget's location in the tree.
inherited
createState() ScrollWrapperState
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.
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
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.
inherited