SantoAppBar class

AppBar组件,基于AppBar封装。为了解决原生的AppBar对Leading宽度的限制 在1.21版本之后，Flutter放开了宽度的限制https://github.com/flutter/flutter/blob/flutter-1.21-candidate.0/packages/flutter/lib/src/material/app_bar.dart

布局规则： leading是左侧显示的内容 title是中间显示的内容 action是右侧显示的内容 呈现的依然是AppBar，优化点在于：第一 title可以传入String 第二 action和leading 封装了快捷使用

用户如果想自定义 使用效果完全可以传入appbar的属性

布局步骤：同appbar默认的布局 先leading、后action，最后title

首先，计算leading的宽度 外部传入则可以leadingWidth 则已外部传入为主

    该组件为[SantoDoubleLeading]和[SantoBackLeading]提供了计算
    leading默认的大小是[SantoAppBarConfig.leadingSize],
    [SantoDoubleLeading]的大小是 但是Leading的宽度的2倍+间距

    leadingWidth默认宽度为SantoAppBarConfig.leadingSize
    如果传入的leading是完全自定义的Widget，可以自行设置leadingWidth

其次，摆放action

最后，对齐title

组件支持两种显示模式深色和浅色。 通过SantoAppBar.brightness属性设置， 深色Brightness.dark模式，背景色是黑色，icon和文字颜色是白色。 浅色Brightness.light模式，背景色是白色，icon和文字颜色是黑色。 如果使用默认的SantoBackLeading和SantoAppBarTitle BkAppBar中的文字颜色和backLeading可自动随着SantoAppBar.brightness变化。

组件提供了默认的返回leading，如果不需要默认的leading可以设置automaticallyImplyLeading为false 默认的leading，提供了默认的返回Navigator.pop(context)， 如果是native打开的话，可能需要单独处理,否则会出现白屏

其他属性同AppBar本身的含义

显示：返回按钮、Appbar示例文本 SantoAppBar( title: 'Appbar示例', )

显示：自定义leading、tab切换、自定义action SantoAppBar( leading: SantoBackLeading(), title: Row( mainAxisSize: MainAxisSize.min, crossAxisAlignment: CrossAxisAlignment.start, children:

相关组件如下:

Inheritance

Constructors

SantoAppBar({Key? key, Widget? leading, bool showLeadingDivider = false, dynamic title, dynamic actions, Color? backgroundColor, PreferredSizeWidget? bottom, double elevation = 0, bool automaticallyImplyLeading = true, double toolbarOpacity = 1.0, double bottomOpacity = 1.0, Alignment titleAlignment = Alignment.center, Widget? flexibleSpace, VoidCallback? backLeadCallback, bool? showDefaultBottom, SantoAppBarConfig? themeData, double? leadingWidth, Color? shadowColor, ShapeBorder? shape, IconThemeData? iconTheme, IconThemeData? actionsIconTheme, bool excludeHeaderSemantics = false, bool primary = true, SystemUiOverlayStyle? systemOverlayStyle, double? titleSpacing})
SantoAppBar.buildSearchResultStyle({Key? key, String? title, Color? backgroundColor, PreferredSizeWidget? bottom, bool showLeadingDivider = true, Widget? flexibleSpace, VoidCallback? backLeadCallback, bool? showDefaultBottom = true, SantoAppBarConfig? themeData, double? leadingWidth, Color? shadowColor, ShapeBorder? shape, IconThemeData? iconTheme, IconThemeData? actionsIconTheme, bool excludeHeaderSemantics = false, bool primary = true, SystemUiOverlayStyle? systemOverlayStyle, double? titleSpacing})

Properties

actions → dynamic
为了方便业务使用，可以设置为Widget或者List
final
actionsIconTheme → IconThemeData?
final
automaticallyImplyLeading → bool
是否自动添加Leading实现
final
backgroundColor → Color?
以下属性都对应于AppBar中的属性 详细介绍可以查阅AppBar的文档
final
backLeadCallback → VoidCallback?
默认处理了返回按钮，flutter的pop，如果是native打开的话，可能需要单独处理,否则会出现白屏 backLeadCallback是默认的处理回调 DefaultLeadingCallBack 也可以通过改方法参数 设置统一的返回处理，该参数是静态的
final
bottom → PreferredSizeWidget?
final
bottomOpacity → double
final
child → Widget
The widget below this widget in the tree.
finalinherited
elevation → double
final
excludeHeaderSemantics → bool
final
flexibleSpace → Widget?
final
hashCode → int
The hash code for this object.
no setterinherited
iconTheme → IconThemeData?
final
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
leading → Widget?
导航栏左侧活动区域,在为null且 automaticallyImplyLeading为true时默认赋值为SantoBackLeading
final
leadingWidth → double?
final
preferredSize → Size
The size this widget would prefer if it were otherwise unconstrained.
no setteroverride
primary → bool
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
shadowColor → Color?
final
shape → ShapeBorder?
final
showDefaultBottom → bool?
是否显示默认的eeeeee分割线，默认显示，可以设置为不显示
final
showLeadingDivider → bool
final
systemOverlayStyle → SystemUiOverlayStyle?
final
themeData → SantoAppBarConfig?
final
title → dynamic
AppBar标题,必须是String或者Widget类型 为String时,会使用SantoAppBarTitle来加载title
final
titleAlignment → Alignment
final
titleSpacing → double?
final
toolbarOpacity → double
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, 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