房地产网页设计网站建设,acg的wordpress主题,庆阳网约车,wordpress 网站地图带文字的TabBar指示器 1.绘制自定义TabBar的绿色带白色文字的指示器 2.将底部灰色文字与TabrBar层叠#xff0c;并调整高度位置与胶囊指示器重叠
自定义的带文字的TabBar指示器
import package:atui/jade/utils/JadeColors.dart;
import package:flutter/material.dart;
im…带文字的TabBar指示器 1.绘制自定义TabBar的绿色带白色文字的指示器 2.将底部灰色文字与TabrBar层叠并调整高度位置与胶囊指示器重叠
自定义的带文字的TabBar指示器
import package:atui/jade/utils/JadeColors.dart;
import package:flutter/material.dart;
import package:flutter_screenutil/flutter_screenutil.dart;class MyCustomTextIndicator extends Decoration {final String text;const MyCustomTextIndicator({required this.text});overrideBoxPainter createBoxPainter([VoidCallback onChanged]) {return _CustomTabIndicatorPainter(text: text);}
}class _CustomTabIndicatorPainter extends BoxPainter {final String text;_CustomTabIndicatorPainter({required this.text});overridevoid paint(Canvas canvas, Offset offset, ImageConfiguration configuration) {final rect Rect.fromLTWH(offset.dx - 40.w,configuration.size.height - 60.w,configuration.size.width 80.w,25,);final _gradientColors [JadeColors.green_16, JadeColors.green_12];final paint Paint()..shader LinearGradient(colors: _gradientColors).createShader(rect);canvas.drawRRect(RRect.fromRectAndRadius(rect, Radius.circular(15)), paint);final _textPainter TextPainter(text: TextSpan(text: text, style: TextStyle(color: Colors.white,fontSize: 22.sp,fontWeight: FontWeight.bold)),textDirection: TextDirection.ltr,);_textPainter.layout();_textPainter.paint(canvas, Offset(rect.left (rect.width - _textPainter.width) / 2, rect.top (rect.height - _textPainter.height) / 2));canvas.save();canvas.restore();}
}引用
//tabBar标签tab数据
ListMapString, dynamic _tabs [{title: 严选, subTitle: 品质优选,range: 41},{title: 优惠, subTitle: 阿推优惠,range: 42},{title: 进口, subTitle: 阿推国际,range: 43},{title: 推享金, subTitle: 排行榜,range: 45},];_tabBar(){return Stack(alignment: Alignment.bottomCenter,children: [Padding(padding: EdgeInsets.only(bottom: 20.w),child: Wrap(alignment: WrapAlignment.start,spacing: 40.w,runSpacing: 0,children: List.generate(_tabs.length, (index) {return Container(alignment: Alignment.center,width: 124.w,child: Text(${_tabs[index][subTitle]},style: TextStyle(color: JadeColors.grey,fontSize: 22.sp,fontWeight: FontWeight.bold),),);}),)),Container(padding: EdgeInsets.symmetric(horizontal: 40.w),child: TabBar(controller: _tabController,isScrollable: false,labelPadding: EdgeInsets.only(left: 10,right: 10,bottom: 10.w),indicator: MyCustomTextIndicator(text: _tabs[_currentIndex][subTitle]),indicatorWeight: 60.w,labelColor: JadeColors.black,labelStyle: TextStyle(fontSize: 34.sp,fontWeight: FontWeight.bold,),unselectedLabelColor: JadeColors.black,unselectedLabelStyle: TextStyle(fontSize: 34.sp,fontWeight: FontWeight.bold,),indicatorSize: TabBarIndicatorSize.label,tabs: _tabs.map((e) Text(e[title])).toList(),onTap: (index) {setState(() {_currentIndex index;});print(_currentIndex $_currentIndex);},)),],);}_tabBarView(){return TabBarView(controller: _tabController,physics: const AlwaysScrollableScrollPhysics(),children: _tabs.map((e) {return MarketGoodsListPage(range: e[range]);}).toList());}上弦的弧形TabBar指示器 自定义指示器
import dart:math;
import package:flutter/material.dart;
import package:flutter_screenutil/flutter_screenutil.dart;/*
* 自定义的上弦圆弧TabBar指示器
* */
class MyCustomArcIndicator extends Decoration {overrideBoxPainter createBoxPainter([VoidCallback onChanged]) {return _CustomBoxPainter(this, onChanged);}
}class _CustomBoxPainter extends BoxPainter {final MyCustomArcIndicator decoration;_CustomBoxPainter(this.decoration, VoidCallback onChanged): super(onChanged);overridevoid paint(Canvas canvas, Offset offset, ImageConfiguration configuration) {final size configuration.size;final newOffset Offset(offset.dx size.width / 2 - 10.w, size.height / 4);var paint Paint();double rowHeight 12;paint.strokeWidth rowHeight / 4;paint.style PaintingStyle.stroke;Path path Path();Rect rect Rect.fromLTWH(newOffset.dx, newOffset.dy rowHeight / 2, rowHeight, rowHeight);path.arcTo(rect, pi / 4,pi / 2, true);paint.color Color(0xFF56CEBA);paint.strokeCap StrokeCap.round;paint.style PaintingStyle.stroke;canvas.drawPath(path, paint);}
}引用
_tabBar(){return TabBar(isScrollable: true,labelPadding: EdgeInsets.only(left: 10,right: 10,bottom: 10.w),indicator: MyCustomArcIndicator(),labelColor: JadeColors.black,labelStyle: TextStyle(fontSize: 36.sp,fontWeight: FontWeight.w600,),unselectedLabelColor: Color(0xff333333),unselectedLabelStyle: TextStyle(fontSize: 36.sp,),indicatorSize: TabBarIndicatorSize.label,controller: providerOfMainModel().tabController,tabs: MainModel.catList().map((e) Text(e[name])).toList(),onTap: (index) {providerOfMainModel().currentTabIndex index;if(index 7){Provider.ofRewardPoolModel(context, listen: false).searchMoneyData();}},);}普通的TabBar自定义指示器 图1 图2 自定义指示器
import package:flutter/material.dart;class MyCustomIndicator extends Decoration {final double indWidth;final double indHeight;final double radius;final ListColor indicatorColor;const MyCustomIndicator({this.indWidth 70.0, this.indHeight 12.0, this.radius 5, required this.indicatorColor});overrideBoxPainter createBoxPainter([VoidCallback onChanged]) {return _CustomBoxPainter(this, onChanged, indWidth, indHeight, radius, indicatorColor);}
}class _CustomBoxPainter extends BoxPainter {final MyCustomIndicator decoration;final double indWidth;final double indHeight;final double radius;final ListColor indicatorColor;_CustomBoxPainter(this.decoration, VoidCallback onChanged, this.indWidth, this.indHeight, this.radius,this.indicatorColor): super(onChanged);overridevoid paint(Canvas canvas, Offset offset, ImageConfiguration configuration) {final size configuration.size;final newOffset Offset(offset.dx (size.width - indWidth) / 2, size.height - indHeight);final Rect rect newOffset Size(indWidth, indHeight);final Paint paint Paint();if(indicatorColor null || indicatorColor.isEmpty){paint.color Colors.yellow;}else{if(indicatorColor.length 1){paint.color indicatorColor[0];}else if(indicatorColor.length 1){paint.shader LinearGradient(colors: indicatorColor, begin: Alignment.centerLeft, end: Alignment.centerRight).createShader(rect);}}paint.style PaintingStyle.fill;canvas.drawRRect(RRect.fromRectAndRadius(rect, Radius.circular(radius)), // 圆角半径paint,);canvas.save();canvas.restore();}
}图1效果的引用
_tabBarView(){return Container(color: Colors.white,child: TabBar(isScrollable: false,labelPadding: EdgeInsets.symmetric(horizontal: 0),indicator: MyCustomIndicator(indicatorColor: [Colors.yellow]),labelColor: Color(0xff333333),labelStyle: TextStyle(fontSize: 30.sp,fontWeight: FontWeight.w600,),unselectedLabelColor: JadeColors.grey,unselectedLabelStyle: TextStyle(fontSize: 30.sp,fontWeight: FontWeight.w300),indicatorSize: TabBarIndicatorSize.label,controller: _tabController,tabs: _tabs.map((value) Container(padding: EdgeInsets.symmetric(horizontal: 20.w),child: Text(value))).toList(),onTap: (index) {},),);}图2效果的引用
TabBar(tabs: tabs,isScrollable: false,unselectedLabelColor: const Color(0xFF000000),labelStyle: TextStyle(fontWeight: FontWeight.bold),labelColor: const Color(0xFF000000),indicatorSize: TabBarIndicatorSize.label,indicator: MyCustomIndicator(indicatorColor: [JadeColors.red,JadeColors.yellow],indHeight: 8.w,indWidth: 92.w),controller: _tabController,)
