ISliverAppBar class
- Inheritance
-
- Object
- DiagnosticableTree
- Widget
- StatefulWidget
- ISliverAppBar
Constructors
-
ISliverAppBar({Key? key, Widget? leading, bool automaticallyImplyLeading = true, Widget? title, List<
Widget> ? actions, Widget? flexibleSpace, PreferredSizeWidget? bottom, double? elevation, Color? shadowColor, bool forceElevated = false, Color? backgroundColor, Color? foregroundColor, @Deprecated('This property is no longer used, please use systemOverlayStyle instead. ' 'This feature was deprecated after v2.4.0-0.0.pre.') Brightness? brightness, IconThemeData? iconTheme, IconThemeData? actionsIconTheme, @Deprecated('This property is no longer used, please use toolbarTextStyle and titleTextStyle instead. ' 'This feature was deprecated after v2.4.0-0.0.pre.') TextTheme? textTheme, bool primary = true, bool? centerTitle, bool excludeHeaderSemantics = false, double? titleSpacing, double? collapsedHeight, double? expandedHeight, bool floating = false, bool pinned = false, bool snap = false, bool stretch = false, double stretchTriggerOffset = 100.0, AsyncCallback? onStretchTrigger, ShapeBorder? shape, double toolbarHeight = kToolbarHeight, double? leadingWidth, @Deprecated('This property is obsolete and is false by default. ' 'This feature was deprecated after v2.4.0-0.0.pre.') bool? backwardsCompatibility, TextStyle? toolbarTextStyle, TextStyle? titleTextStyle, SystemUiOverlayStyle? systemOverlayStyle, AppBarController? controller}) -
Creates a material design app bar that can be placed in a CustomScrollView.
const
Properties
-
actions
→ List<
Widget> ? -
A list of Widgets to display in a row after the title widget.
final
- actionsIconTheme → IconThemeData?
-
The color, opacity, and size to use for the icons that appear in the app
bar's actions.
final
- automaticallyImplyLeading → bool
-
Controls whether we should try to imply the leading widget if null.
final
- backgroundColor → Color?
-
The fill color to use for an app bar's Material.
final
- backwardsCompatibility → bool?
-
This property is used to configure an AppBar.
final
- bottom → PreferredSizeWidget?
-
This widget appears across the bottom of the app bar.
final
- brightness → Brightness?
-
This property is used to configure an AppBar.
final
- centerTitle → bool?
-
Whether the title should be centered.
final
- collapsedHeight → double?
-
Defines the height of the app bar when it is collapsed.
final
- controller → AppBarController?
-
监听app bar高度变化
final
- elevation → double?
-
The z-coordinate at which to place this app bar relative to its parent.
final
- excludeHeaderSemantics → bool
-
Whether the title should be wrapped with header Semantics.
final
- expandedHeight → double?
-
The size of the app bar when it is fully expanded.
final
- flexibleSpace → Widget?
-
This widget is stacked behind the toolbar and the tab bar. Its height will
be the same as the app bar's overall height.
final
- floating → bool
-
Whether the app bar should become visible as soon as the user scrolls
towards the app bar.
final
- forceElevated → bool
-
Whether to show the shadow appropriate for the elevation even if the
content is not scrolled under the AppBar.
final
- foregroundColor → Color?
-
The default color for Text and Icons within the app bar.
final
- hashCode → int
-
The hash code for this object.
no setterinherited
- iconTheme → IconThemeData?
-
The color, opacity, and size to use for toolbar icons.
final
- key → Key?
-
Controls how one widget replaces another widget in the tree.
finalinherited
- leading → Widget?
-
A widget to display before the toolbar's title.
final
- leadingWidth → double?
-
Defines the width of AppBar.leading widget.
final
- onStretchTrigger → AsyncCallback?
-
The callback function to be executed when a user over-scrolls to the
offset specified by stretchTriggerOffset.
final
- pinned → bool
-
Whether the app bar should remain visible at the start of the scroll view.
final
- primary → bool
-
Whether this app bar is being displayed at the top of the screen.
final
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
- shadowColor → Color?
-
The color of the shadow below the app bar.
final
- shape → ShapeBorder?
-
The shape of the app bar's Material as well as its shadow.
final
- snap → bool
-
If snap and floating are true then the floating app bar will "snap"
into view.
final
- stretch → bool
-
Whether the app bar should stretch to fill the over-scroll area.
final
- stretchTriggerOffset → double
-
The offset of overscroll required to activate onStretchTrigger.
final
- systemOverlayStyle → SystemUiOverlayStyle?
-
Specifies the style to use for the system overlays (e.g. the status bar on
Android or iOS, the system navigation bar on Android).
final
- textTheme → TextTheme?
-
This property is used to configure an AppBar.
final
- title → Widget?
-
The primary widget displayed in the app bar.
final
- titleSpacing → double?
-
The spacing around title content on the horizontal axis. This spacing is
applied even if there is no leading content or actions. If you want
title to take all the space available, set this value to 0.0.
final
- titleTextStyle → TextStyle?
-
The default text style for the AppBar's title widget.
final
- toolbarHeight → double
-
Defines the height of the toolbar component of an AppBar.
final
- toolbarTextStyle → TextStyle?
-
The default text style for the AppBar's leading, and
actions widgets, but not its title.
final
Methods
-
createElement(
) → StatefulElement -
Creates a StatefulElement to manage this widget's location in the tree.
inherited
-
createState(
) → State< ISliverAppBar> -
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}) → 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