ScrollShadow class
A widget that adds shadows to the top and bottom edges of a scrollable area to visually indicate overflow content.
The ScrollShadow is designed to dynamically display shadows at the edges of a scrollable widget based on the scroll state and content size. Shadows help provide a visual cue that more content is available in a particular direction.
The visibility, padding, color, and other aspects of the shadows can be customized independently for the top and bottom edges.
Example Usage
ScrollShadow(
topShadowVisibility: ShadowVisibility.whenScrolled,
bottomShadowVisibility: ShadowVisibility.alwaysOn,
topShadowColor: Colors.black45,
bottomShadowColor: Colors.black45,
child: ListView.builder(
itemCount: 50,
itemBuilder: (context, index) => ListTile(title: Text('Item $index')),
),
);
- Inheritance
-
- Object
- DiagnosticableTree
- Widget
- StatefulWidget
- ScrollShadow
Constructors
- ScrollShadow.new({required Widget? child, double? topRightPadding, double? topLeftPadding, Radius? topRadius, double? bottomRightPadding, double? bottomLeftPadding, Radius? bottomRadius, ShadowVisibility topShadowVisibility = ShadowVisibility.whenScrolled, ShadowVisibility bottomShadowVisibility = ShadowVisibility.whenScrolled, Color topShadowColor = Colors.black, Color bottomShadowColor = Colors.black, Color topShadowDividerColor = const Color(0xD0000000), Color bottomShadowDividerColor = const Color(0xD0000000), double? elevation, bool ifHidesShadowForNegativeScroll = false, Key? key})
-
A widget that adds shadows to the top and bottom edges of a scrollable area
to visually indicate overflow content.
const
- ScrollShadow.simple({required Widget? child, double topRightPadding = 0.0, double topLeftPadding = 0.0, Radius topRadius = Radius.zero, double bottomRightPadding = 0.0, double bottomLeftPadding = 0.0, Radius bottomRadius = Radius.zero, ShadowVisibility topShadowVisibility = ShadowVisibility.whenScrolled, ShadowVisibility bottomShadowVisibility = ShadowVisibility.whenScrolled, Color topShadowColor = Colors.black, Color bottomShadowColor = Colors.black, Color topShadowDividerColor = const Color(0xD0000000), Color bottomShadowDividerColor = const Color(0xD0000000), double? elevation, bool ifHidesShadowForNegativeScroll = false, Key? key})
-
const
Properties
- bottomLeftPadding → double
-
Padding applied to the left side of the bottom shadow.
final
- bottomRadius → Radius
-
Radius used for rounding the bottom shadow's corners.
final
- bottomRightPadding → double
-
Padding applied to the right side of the bottom shadow.
final
- bottomShadowColor → Color
-
The color of the bottom shadow.
final
- bottomShadowDividerColor → Color
-
The divider color that appears along the bottom edge of the shadow.
final
- bottomShadowVisibility → ShadowVisibility
-
Controls the visibility behavior of the bottom shadow.
final
- child → Widget?
-
The child widget wrapped by the
ScrollShadow.final - elevation → double?
-
The elevation of the shadows, which determines their intensity and blur radius.
final
- hashCode → int
-
The hash code for this object.
no setterinherited
- ifHidesShadowForNegativeScroll → bool
-
If
true, hides the shadow when the scroll position is negative (overscrolled).final - key → Key?
-
Controls how one widget replaces another widget in the tree.
finalinherited
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
- topLeftPadding → double
-
Padding applied to the left side of the top shadow.
final
- topRadius → Radius
-
Radius used for rounding the top shadow's corners.
final
- topRightPadding → double
-
Padding applied to the right side of the top shadow.
final
- topShadowColor → Color
-
The color of the top shadow.
final
- topShadowDividerColor → Color
-
The divider color that appears along the top edge of the shadow.
final
- topShadowVisibility → ShadowVisibility
-
Controls the visibility behavior of the top shadow.
final
Methods
-
createElement(
) → StatefulElement -
Creates a StatefulElement to manage this widget's location in the tree.
inherited
-
createState(
) → State< ScrollShadow> -
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 nonexistent 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, int wrapWidth = 65}) → 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
Constants
- defaultLeftPadding → const double
- Default padding applied to the left side of the shadow for top and bottom edges.
- defaultRadius → const Radius
- Default radius used for rounding the shadow's corners.
- defaultRightPadding → const double
- Default padding applied to the right side of the shadow for top and bottom edges.