* remove useless comments

* remove useless dependencies

* adapt brn_expandable_text.dart null-safe

* ♻️ Migrate utils to NNBD

* 🎨 Improve the color getter

* Theme: 优化单例实现，初步优化 BrnAllThemeConfig 属性获取不为 null

* refactor:优化theme,暴露非null引用

* theme:去除无用信息及优化部分代码

* theme:增加属性类型

* 🎨 utils-EventBus添加null-safe

* 🎨 修改theme配置功能及utils/brn_tools工具函数 null-safe

* 🎨 EventBus添加null-safe(其他提交请忽略,输入回退)

Co-authored-by: 大脸儿 <hexintao521@hotmail.com>

* refactor brn_toast

* refactor brn_toast

* Theme: 优化单例实现，初步优化 BrnAllThemeConfig 属性获取不为 null

* refactor:优化theme,暴露非null引用

* theme:去除无用信息及优化部分代码

* theme:增加属性类型

* 优化修复 EventBus

* migrate brn_loading to null safety

* mv loading content to brnString constants

…fe (#46)

* [null-safe]: BrnStateTag、BrnTagCustom、BrnSelectTag、BrnDeleteTag 空安全适配

* perf: BrnDeleteTag null-safe

* Theme: 优化单例实现，初步优化 BrnAllThemeConfig 属性获取不为 null

* refactor:优化theme,暴露非null引用

* theme:去除无用信息及优化部分代码

* theme:增加属性类型

* 优化修复 EventBus

* 迁移example ，优化常量命名，增加export

* migrate brn_empty_status.dart

* 删除 BrnThemeImg

* fix:tagConfig merge方法增加判空处理

* fix:revert tagConfig

* fix:BrnAbnormalStateWidget空处理

* 空安全报错修改

* reset and migrated package [rating] to null-safety.

* Migrated package [selectcity] to null-safety

* 修改ISuspensionBean抽象类相关子类的空字段问题。

* Migrated package [noticebar] to null-safety

* migrate card_title to null-safety

* [fix] brn_action_card_title: _sub widget is not null

* [optimize] empty widget use SizedBox instead of Container

* replace empty widget SizedBox to SizedBox.shrink

* reset and migrated package [rating] to null-safety.

* Migrated package [selectcity] to null-safety

* 修改ISuspensionBean抽象类相关子类的空字段问题。

* Migrated package [noticebar] to null-safety

* 1.Migrated package [radio] to null-safety;
2.Modified not-need-nullable param in brn_single_select_city_page.dart;

* reset and migrated package [rating] to null-safety.

* Migrated package [selectcity] to null-safety

* 修改ISuspensionBean抽象类相关子类的空字段问题。

* Migrated package [noticebar] to null-safety

* 1.Migrated package [radio] to null-safety;
2.Modified not-need-nullable param in brn_single_select_city_page.dart;

* Migrated package [guide] to null-safety

* migrate calendar widget to null safety

* brn_calendar_view fix _currentStartSelectedDate is not null

* brn_calendar_view: simplify borderRadius usage

* calendar widget late _displayMode

* calendar widget add two constructors with date change

* feat: support fvm

* feat: Card components null-safey adpater

* refactor: make code simple and clean

* refactor: make code simple and clean

* icon button 增加null safe

* null safe for normal button

* null safe for normal button

* null safe for button

* null safe for all button

* merge

* rebase

* rebase

* merge

* optimization

* GlobalKey is not null

* optimization

* reset popup window

* showButtonPanelPopList

Co-authored-by: foreturn <foreturn@outlook.com>

* reset and migrated package [rating] to null-safety.

* Migrated package [selectcity] to null-safety

* 修改ISuspensionBean抽象类相关子类的空字段问题。

* Migrated package [noticebar] to null-safety

* 1.Migrated package [radio] to null-safety;
2.Modified not-need-nullable param in brn_single_select_city_page.dart;

* Migrated package [guide] to null-safety

* Migrated package [navbar][input] to null-safety

* Optimized codes in brn_appbar.dart

* Restore partial modification

* Theme: 优化单例实现，初步优化 BrnAllThemeConfig 属性获取不为 null

* refactor:优化theme,暴露非null引用

* theme:去除无用信息及优化部分代码

* theme:增加属性类型

* 优化修复 EventBus

* 迁移example ，优化常量命名，增加export

* migrate brn_empty_status.dart

* 删除 BrnThemeImg

* fix:tagConfig merge方法增加判空处理

* fix:revert tagConfig

* fix:BrnAbnormalStateWidget空处理

* Migrated tabbar to null-safety

* Migrated scroll_anchor to null-safety

* fix:修复迁移tabar问题

* [null-safe]: BrnStateTag、BrnTagCustom、BrnSelectTag、BrnDeleteTag 空安全适配

* perf: BrnDeleteTag null-safe

* Migrate Selection to null-safe

* Migrate Selection to null-safe

* perf:  ItemEntity name 字段的初始化

* Migrate Selection to null-safe

* reset and migrated package [rating] to null-safety.

* Migrated package [selectcity] to null-safety

* 修改ISuspensionBean抽象类相关子类的空字段问题。

* Migrated package [noticebar] to null-safety

* 1.Migrated package [radio] to null-safety;
2.Modified not-need-nullable param in brn_single_select_city_page.dart;

* Migrated package [guide] to null-safety

* Migrated package [navbar][input] to null-safety

* Optimized codes in brn_appbar.dart

* Restore partial modification

* Migrated package [dialog] to null-safety

* Modified some params's default value or  nullable type

* migrate DoughuntChart to null safety

* migrate progress bar chart to null safety

* update progress bar chart document

* migrate progress chart to null safety

* migrate radar chart to null safety

* migrate funnel chart to null safety

* migrate broken line chart to null safety

* fix progress bar chart some value is required

* fix progress bar chart some value is required

* fix brn_line_paint _path is not null

* fix brn_funnel_chart properties is not null

* fix brn_radar_chart properties is not null

* fix brn_line_painter not null values

* fix brn_progress_bar_chart error

* brn_broken_line some properties is not null value

* replace empty Container to SizedBox.shrink

* update progress_bar_chart null safety value by hand

* update broken_line null safety values by hand

* update funnel_chart null safety value by hand

* make LineCanvasModel immutable

* migrate actionsheet into null-safe

* sheet: code review

Co-authored-by: yuanjunliang <yuanjunliang1@flkj.ai>

* Theme: 优化单例实现，初步优化 BrnAllThemeConfig 属性获取不为 null

* refactor:优化theme,暴露非null引用

* theme:去除无用信息及优化部分代码

* theme:增加属性类型

* 优化修复 EventBus

* 迁移example ，优化常量命名，增加export

* migrate brn_empty_status.dart

* 删除 BrnThemeImg

* fix:tagConfig merge方法增加判空处理

* fix:revert tagConfig

* fix:BrnAbnormalStateWidget空处理

* Migrated tabbar to null-safety

* Migrated scroll_anchor to null-safety

* fix:修复迁移tabar问题

* migrate form to null safety

* fix：修复tabbar报错及selection警告信息

* fix:修复迁移问题

* fix:优化迁移部分问题key和style非空问题

* migrate popup to null safety

* fix MeasureSize null safe problems

* fix popup migrate to null-safety review problems

* migrate gallery to null safety

* change the type error

* remove @

* change String? to String

* migrate appraise dir to null safety

* fix appraise migrate to null-safety review problems

* Theme: 优化单例实现，初步优化 BrnAllThemeConfig 属性获取不为 null

* refactor:优化theme,暴露非null引用

* theme:去除无用信息及优化部分代码

* theme:增加属性类型

* 优化修复 EventBus

* 迁移example ，优化常量命名，增加export

* migrate brn_empty_status.dart

* 删除 BrnThemeImg

* fix:tagConfig merge方法增加判空处理

* fix:revert tagConfig

* fix:BrnAbnormalStateWidget空处理

* Migrated tabbar to null-safety

* Migrated scroll_anchor to null-safety

* fix:修复迁移tabar问题

* migrate form to null safety

* fix：修复tabbar报错及selection警告信息

* fix:修复迁移问题

* fix:优化迁移部分问题key和style非空问题

* migrate picker to null safety

* fix:修复picker空安全迁移问题

* fix:修复list没指定泛型及if判断错误问题

* fix:migrate dashed line to null safty

* perf: Migrate Button Null-Safe

* perf：优化 HorizontalStep Null-Safe

* fix: null exception when parse json to entity

* perf Button Null-Safe,
fix NullException
perf  more layer  icon  color when item selected

* Theme: 优化单例实现，初步优化 BrnAllThemeConfig 属性获取不为 null

* refactor:优化theme,暴露非null引用

* theme:去除无用信息及优化部分代码

* theme:增加属性类型

* 优化修复 EventBus

* 迁移example ，优化常量命名，增加export

* migrate brn_empty_status.dart

* 删除 BrnThemeImg

* fix:tagConfig merge方法增加判空处理

* fix:revert tagConfig

* fix:BrnAbnormalStateWidget空处理

* Migrated tabbar to null-safety

* Migrated scroll_anchor to null-safety

* fix:修复迁移tabar问题

* migrate form to null safety

* fix：修复tabbar报错及selection警告信息

* fix:修复迁移问题

* fix:优化迁移部分问题key和style非空问题

* migrate picker to null safety

* fix:修复picker空安全迁移问题

* fix:修复list没指定泛型及if判断错误问题

* fix:migrate dashed line to null safty

* migrate example to null safty

* fix:修复部分example warning

* fix:修复demo报错问题

* fix:追加未跟踪修复

* fix:优化部分接口可空参数为非空

Co-authored-by: violinday <flwh123@sina.com>

* Theme: 优化单例实现，初步优化 BrnAllThemeConfig 属性获取不为 null

* refactor:优化theme,暴露非null引用

* theme:去除无用信息及优化部分代码

* theme:增加属性类型

* 优化修复 EventBus

* 迁移example ，优化常量命名，增加export

* migrate brn_empty_status.dart

* 删除 BrnThemeImg

* fix:tagConfig merge方法增加判空处理

* fix:revert tagConfig

* fix:BrnAbnormalStateWidget空处理

* Migrated tabbar to null-safety

* Migrated scroll_anchor to null-safety

* fix:修复迁移tabar问题

* migrate form to null safety

* fix：修复tabbar报错及selection警告信息

* fix:修复迁移问题

* fix:优化迁移部分问题key和style非空问题

* migrate picker to null safety

* fix:修复picker空安全迁移问题

* fix:修复list没指定泛型及if判断错误问题

* fix:migrate dashed line to null safty

* migrate example to null safty

* fix:修复部分example warning

* fix:修复demo报错问题

* fix:追加未跟踪修复

* fix:优化部分接口可空参数为非空

* fix:修复tabar showmore overflow 问题 #98 以及 tabbar 标签颜色默认设置倒置问题

Co-authored-by: violinday <flwh123@sina.com>