NextAccordion class

A single-line ListTile with an expansion arrow icon that expands or collapses the tile to reveal or hide the children.

This widget is typically used with ListView to create an "expand / collapse" list entry. When used with scrolling widgets like ListView, a unique PageStorageKey must be specified to enable the NextAccordion to save and restore its expanded state when it is scrolled in and out of view.

This class overrides the ListTileThemeData.iconColor and ListTileThemeData.textColor theme properties for its ListTile. These colors animate between values when the tile is expanded and collapsed: between iconColor, collapsedIconColor and between textColor and collapsedTextColor.

The expansion arrow icon is shown on the right by default in left-to-right languages (i.e. the trailing edge). This can be changed using controlAffinity. This maps to the leading and trailing properties of NextAccordion.

Inheritance
Available extensions

Constructors

NextAccordion({Key? key, Widget? leading, required Widget title, Widget? subtitle, ValueChanged<bool>? onExpansionChanged, List<Widget> children = const <Widget>[], Widget? trailing(bool isExpanded)?, bool initiallyExpanded = false, bool maintainState = false, EdgeInsetsGeometry? tilePadding, double? horizontalTitleGap, Color? borderColor, CrossAxisAlignment? expandedCrossAxisAlignment, Alignment? expandedAlignment, EdgeInsetsGeometry? childrenPadding, Color? backgroundColor, Color? collapsedBackgroundColor, Color? textColor, Color? collapsedTextColor, Color? iconColor, Color? collapsedIconColor, ListTileControlAffinity? controlAffinity})
const

Properties

backgroundColor → Color?
The color to display behind the sublist when expanded.
final
borderColor → Color?
Border Color while expanded
final
children → List<Widget>
The widgets that are displayed when the tile expands.
final
childrenPadding → EdgeInsetsGeometry?
Specifies padding for children.
final
collapsedBackgroundColor → Color?
When not null, defines the background color of tile when the sublist is collapsed.
final
collapsedIconColor → Color?
The icon color of tile's expansion arrow icon when the sublist is collapsed.
final
collapsedTextColor → Color?
The color of the tile's titles when the sublist is collapsed.
final
controlAffinity → ListTileControlAffinity?
Typically used to force the expansion arrow icon to the tile's leading or trailing edge.
final
expandedAlignment → Alignment?
Specifies the alignment of children, which are arranged in a column when the tile is expanded.
final
expandedCrossAxisAlignment → CrossAxisAlignment?
Specifies the alignment of each child within children when the tile is expanded.
final
hashCode → int
The hash code for this object.
no setterinherited
horizontalTitleGap → double?
Provides gap between title and leading widget
final
iconColor → Color?
The icon color of tile's expansion arrow icon when the sublist is expanded.
final
initiallyExpanded → bool
Specifies if the list tile is initially expanded (true) or collapsed (false, the default).
final
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
leading → Widget?
A widget to display before the title.
final
maintainState → bool
Specifies whether the state of the children is maintained when the tile expands and collapses.
final
onExpansionChanged → ValueChanged<bool>?
Called when the tile expands or collapses.
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
subtitle → Widget?
Additional content displayed below the title.
final
textColor → Color?
The color of the tile's titles when the sublist is expanded.
final
tilePadding → EdgeInsetsGeometry?
Specifies padding for the ListTile.
final
title → Widget
The primary content of the list item.
final
trailing → Widget? Function(bool isExpanded)?
A widget to display after the title.
final

Methods

addDecoration(BoxDecoration decoration) → Widget

Available on Widget, provided by the WidgetExtensions extension

aspectRatio({Key? key, required double aspectRatio}) → Widget

Available on Widget, provided by the WidgetExtensions extension

bounce({Duration duration = const Duration(milliseconds: 350), Duration delay = Duration.zero, AnimationController? controller, bool startAnimation = true, double initialPosition = 100, bool loop = false, double viewPort = 0.1, NextBounceVariant variant = NextBounceVariant.bounceInLeft}) → Widget

Available on Widget, provided by the AnimationExtension extension

boxShadow({Key? key, Color color = const Color(0xFF000000), Offset offset = Offset.zero, double blurRadius = 0.0, double spreadRadius = 0.0, bool animate = false}) → Widget

Available on Widget, provided by the WidgetExtensions extension

center({Key? key, double? widthFactor, double? heightFactor}) → Widget

Available on Widget, provided by the WidgetExtensions extension

clipOval({Key? key, CustomClipper<Rect>? clipper, Clip clipBehavior = Clip.antiAlias}) → Widget

Available on Widget, provided by the WidgetExtensions extension

clipRect({Key? key, CustomClipper<Rect>? clipper, Clip clipBehavior = Clip.hardEdge}) → Widget

Available on Widget, provided by the WidgetExtensions extension

clipRRect({Key? key, double? all, double? topLeft, double? topRight, double? bottomLeft, double? bottomRight, CustomClipper<RRect>? clipper, Clip clipBehavior = Clip.antiAlias, bool animate = false}) → Widget

Available on Widget, provided by the WidgetExtensions extension

container({Key? key, AlignmentGeometry? alignment, EdgeInsetsGeometry? padding, Color? color, Decoration? decoration, Decoration? foregroundDecoration, double? width, double? height, BoxConstraints? constraints, EdgeInsetsGeometry? margin, Matrix4? transform, AlignmentGeometry? transformAlignment, Clip clipBehavior = Clip.none, bool shouldAnimate = false, Duration animationDuration = const Duration(milliseconds: 450)}) → Widget

Available on Widget, provided by the WidgetExtensions extension

createElement() → StatefulElement
Creates a StatefulElement to manage this widget's location in the tree.
inherited
createState() → State<NextAccordion>
Creates the mutable state for this widget at a given location in the tree.
override
customPadding({Key? key, double left = 0.0, double top = 0.0, double right = 0.0, double bottom = 0.0}) → Widget

Available on Widget, provided by the PaddingExtension extension

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
fadeIn({Duration duration = const Duration(milliseconds: 350), Duration delay = Duration.zero, AnimationController? controller, bool startAnimation = true, bool loop = false, double viewPort = 0.1, double initialPosition = 100, NextFadeInVariant variant = NextFadeInVariant.fadeInLeft}) → Widget

Available on Widget, provided by the AnimationExtension extension

fadeOut({Duration duration = const Duration(milliseconds: 350), Duration delay = Duration.zero, AnimationController? controller, bool startAnimation = true, double initialPosition = 100, bool loop = false, double viewPort = 0.1, NextFadeOutVariant variant = NextFadeOutVariant.fadeOutLeft}) → Widget

Available on Widget, provided by the AnimationExtension extension

fittedBox({Key? key, BoxFit fit = BoxFit.contain, AlignmentGeometry alignment = Alignment.center}) → Widget

Available on Widget, provided by the WidgetExtensions extension

flexible({Key? key, int flex = 1, FlexFit fit = FlexFit.loose}) → Widget

Available on Widget, provided by the WidgetExtensions extension

flip({Duration duration = const Duration(milliseconds: 350), Duration delay = Duration.zero, AnimationController? controller, bool startAnimation = true, bool loop = false, double viewPort = 0.1, NextFlipVariant variant = NextFlipVariant.flipX}) → Widget

Available on Widget, provided by the AnimationExtension extension

fractionallySizedBox({Key? key, AlignmentGeometry alignment = Alignment.center, double? widthFactor, double? heightFactor}) → Widget

Available on Widget, provided by the WidgetExtensions extension

noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
onDoubleTap(void onDoubleTap(), {bool autoFocus = false}) → Widget

Available on Widget, provided by the GestureExtension extension

onLongPress(void onLongPress(), {bool autoFocus = false}) → Widget

Available on Widget, provided by the GestureExtension extension

onTap(void onTap(), {bool autoFocus = false}) → Widget

Available on Widget, provided by the GestureExtension extension

pad(double padding, {Key? key}) → Widget

Available on Widget, provided by the PaddingExtension extension

paddingSymmetric({double horizontal = 0.0, double vertical = 0.0, Key? key}) → Widget

Available on Widget, provided by the PaddingExtension extension

safeArea({Key? key, bool left = true, bool top = true, bool right = true, bool bottom = true, EdgeInsets minimum = EdgeInsets.zero, bool maintainBottomViewPadding = false}) → Widget

Available on Widget, provided by the WidgetExtensions extension

sizedBox({Key? key, double? width, double? height}) → Widget

Available on Widget, provided by the WidgetExtensions extension

slide({Duration duration = const Duration(milliseconds: 350), Duration delay = Duration.zero, AnimationController? controller, bool loop = false, double viewPort = 0.1, bool startAnimation = true, double initialPosition = 100, NextSlideVariant variant = NextSlideVariant.slideInLeft}) → Widget

Available on Widget, provided by the AnimationExtension extension

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
zoom({Duration duration = const Duration(milliseconds: 350), Duration delay = Duration.zero, AnimationController? controller, bool startAnimation = true, bool loop = false, double viewPort = 0.1, double initialPosition = 1, NextZoomVariant variant = NextZoomVariant.zoomIn}) → Widget

Available on Widget, provided by the AnimationExtension extension

Operators

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