AccentPanel class

A panel with a colored vertical accent stripe on one side.

This is a common TUI pattern for callouts, info panels, collapsible sections, and message annotations. The accent color can convey semantic meaning (e.g., green for success, red for error, blue for info).

Fully themeable via AccentPanelThemeData.

AccentPanel(
  accentColor: theme.success,
  child: Text('File saved successfully'),
)
Inheritance

Constructors

AccentPanel({required Widget child, Color? accentColor, int? accentWidth, String? accentChar, AccentSide side = AccentSide.left, Color? background, Color? foreground, EdgeInsets? padding, String? title, Style? titleStyle, bool? expanded, ValueCmdCallback<bool>? onExpandChanged, Key? key})

Properties

accentChar → String?
Character used for the accent stripe (default: '│').
final
accentColor → Color?
Color of the accent stripe. Defaults to AccentPanelThemeData.accentColor or Theme.primary.
final
accentWidth → int?
Width of the accent stripe in columns (default: 1). Defaults to AccentPanelThemeData.accentWidth or 1.
final
background → Color?
Background color of the panel body. Defaults to AccentPanelThemeData.background or transparent.
final
child → Widget
The panel body content.
final
children → List<Widget>
Child widgets that receive forwarded messages.
no setterinherited
debugRenderObjectPassthrough → bool
Whether this widget is intentionally transparent to render-object layouts.
no setterinherited
expanded → bool?
If non-null, makes the panel collapsible with this expansion state.
final
focusable → bool
Whether this widget can receive keyboard focus.
no setterinherited
foreground → Color?
Text color in the panel body. Defaults to AccentPanelThemeData.foreground or Theme.onSurface.
final
hashCode → int
The hash code for this object.
no setterinherited
id → String
Unique identifier for this widget.
no setterinherited
key → Key?
Key for preserving widget identity.
finalinherited
onExpandChanged → ValueCmdCallback<bool>?
Called when the expand/collapse toggle is tapped.
final
padding → EdgeInsets?
Content padding inside the panel (excluding the accent stripe). Defaults to AccentPanelThemeData.padding or left: 1.
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
side → AccentSide
Which side the accent stripe is drawn on.
final
theme → Theme
Access the current theme.
no setterinherited
title → String?
Optional title shown on the first line.
final
titleStyle → Style?
Style for the title text.
final

Methods

build(BuildContext context) → Widget
Describes the part of the UI represented by this widget.
override
buildCachedView<T>(T builder(), Object? cacheKey) → T
Returns a cached view if the cache key matches.
inherited
handleInit() → Cmd?
Override this instead of init for widget-specific initialization.
inherited
handleIntercept(Msg msg) → (Widget, Cmd?)
Override this to handle messages before they reach children.
inherited
handleUpdate(Msg msg) → (Widget, Cmd?)
Override this to handle messages specific to this widget.
inherited
init() → Cmd?
Called once when the widget is first mounted.
inherited
invalidateCachedView() → void
Clears any cached view for this widget.
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
toString() → String
A string representation of this object.
inherited
update(Msg msg) → (Model, Cmd?)
Handles messages by forwarding to children then calling handleUpdate.
inherited
view() → Object
Renders the widget to a string or View.
inherited

Operators

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