BackdropAppBar class

A material app bar with backdrop related functionality.

It offers functionality for triggering the BackdropScaffold's functionality.

It is internally implemented using the AppBar class. What differs from the AppBar implementation is the behaviour of leading, automaticallyImplyLeading and elevation.

Usage example:

Widget build(BuildContext context) {
  return MaterialApp(
    title: 'Backdrop Demo',
    home: BackdropScaffold(
      appBar: BackdropAppBar(
        title: Text("Backdrop Example"),
        actions: <Widget>[
          BackdropToggleButton(
            icon: AnimatedIcons.list_view,
          )
        ],
      ),
      ...
    ),
  );
}

See also:

  • AppBar, which is the plain app bar used in material apps.
Inheritance
Implemented types

Constructors

BackdropAppBar({Key? key, Widget? leading, bool automaticallyImplyLeading = true, Widget? title, List<Widget>? actions, Widget? flexibleSpace, PreferredSizeWidget? bottom, double? elevation = 0.0, Color? shadowColor, ShapeBorder? shape, Color? backgroundColor, Color? foregroundColor, IconThemeData? iconTheme, IconThemeData? actionsIconTheme, bool primary = true, bool? centerTitle, bool excludeHeaderSemantics = false, double? titleSpacing, double toolbarOpacity = 1.0, double bottomOpacity = 1.0, double? toolbarHeight, double? leadingWidth, TextStyle? toolbarTextStyle, TextStyle? titleTextStyle, SystemUiOverlayStyle? systemOverlayStyle})
Creates a backdrop app bar.

Properties

actions → List<Widget>?
See AppBar.actions.
final
actionsIconTheme → IconThemeData?
See AppBar.actionsIconTheme.
final
automaticallyImplyLeading → bool
See AppBar.automaticallyImplyLeading.
final
backgroundColor → Color?
See AppBar.backgroundColor.
final
bottom → PreferredSizeWidget?
See AppBar.bottom.
final
bottomOpacity → double
See AppBar.bottomOpacity.
final
centerTitle → bool?
See AppBar.centerTitle.
final
elevation → double?
See AppBar.elevation.
final
excludeHeaderSemantics → bool
See AppBar.excludeHeaderSemantics.
final
flexibleSpace → Widget?
See AppBar.flexibleSpace.
final
foregroundColor → Color?
See AppBar.foregroundColor.
final
hashCode → int
The hash code for this object.
no setterinherited
iconTheme → IconThemeData?
See AppBar.iconTheme.
final
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
leading → Widget?
See AppBar.leading.
final
leadingWidth → double?
See AppBar.leadingWidth.
final
preferredSize → Size
See AppBar.preferredSize.
final
primary → bool
See AppBar.primary.
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
shadowColor → Color?
See AppBar.shadowColor.
final
shape → ShapeBorder?
See AppBar.shape
final
systemOverlayStyle → SystemUiOverlayStyle?
See AppBar.systemOverlayStyle.
final
title → Widget?
The widget that should be displayed as the AppBar title.
final
titleSpacing → double?
See AppBar.iconTheme.titleSpacing
final
titleTextStyle → TextStyle?
See AppBar.titleTextStyle.
final
toolbarHeight → double?
See AppBar.toolbarHeight.
final
toolbarOpacity → double
See AppBar.toolbarOpacity.
final
toolbarTextStyle → TextStyle?
See AppBar.toolbarTextStyle.
final

Methods

build(BuildContext context) → Widget
Describes the part of the user interface represented by this widget.
override
createElement() → StatelessElement
Creates a StatelessElement to manage this widget's location in the tree.
inherited
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}) → 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