flutter开发实战-可扩展popup弹窗template模版样式

2024-02-05 15:04
文章标签 实战 开发 扩展 样式 template flutter 模版 弹窗 popup

本文主要是介绍flutter开发实战-可扩展popup弹窗template模版样式，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

flutter开发实战-可扩展popup弹窗template模版样式

最近在看到一个flutter_beautiful_popup，可以美化弹窗窗口样式。该插件通过一个template模版的类BeautifulPopupTemplate作为抽象的base类。
在这里插入图片描述

一、基类BeautifulPopupTemplate

在BeautifulPopupTemplate中，BeautifulPopupTemplate为抽象类。该类定义了get方法size、width、height、maxWidth、maxHeight、bodyMargin、illustrationPath、primaryColor、close、background、title、content、actions、button。

在一个popup中一般有标题title、内容content、操作的按钮、关闭按钮等，所以这个BeautifulPopupTemplate定义了这些内容。
BeautifulPopupTemplate需要传递一个BeautifulPopup，该类中包括了BeautifulPopupTemplate需要的context、_illustration等。

BeautifulPopupTemplate代码如下

import 'package:flutter/material.dart';
import '../flutter_component_beautiful_popup.dart';
import 'dart:ui' as ui;
import 'package:auto_size_text/auto_size_text.dart';typedef Widget BeautifulPopupButton({required String label,required void Function() onPressed,TextStyle labelStyle,bool outline,bool flat,
});/// You can extend this class to custom your own template.
abstract class BeautifulPopupTemplate extends StatefulWidget {final BeautifulPopup options;BeautifulPopupTemplate(this.options);final State<StatefulWidget> state = BeautifulPopupTemplateState();@overrideState<StatefulWidget> createState() => state;Size get size {double screenWidth = MediaQuery.of(options.context).size.width;double screenHeight = MediaQuery.of(options.context).size.height;double height = screenHeight > maxHeight ? maxHeight : screenHeight;double width;height = height - bodyMargin * 2;if ((screenHeight - height) < 140) {// For keep close button visibleheight = screenHeight - 140;width = height / maxHeight * maxWidth;} else {if (screenWidth > maxWidth) {width = maxWidth - bodyMargin * 2;} else {width = screenWidth - bodyMargin * 2;}height = width / maxWidth * maxHeight;}return Size(width, height);}double get width => size.width;double get height => size.height;double get maxWidth;double get maxHeight;double get bodyMargin;/// The path of the illustration asset.String get illustrationPath => '';String get illustrationKey =>'packages/flutter_component_beautiful_popup/$illustrationPath';Color get primaryColor;double percentW(double n) {return width * n / 100;}double percentH(double n) {return height * n / 100;}Widget get close {return MaterialButton(shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(100)),splashColor: Colors.transparent,hoverColor: Colors.transparent,minWidth: 45,height: 45,child: Container(padding: EdgeInsets.all(20),child: Icon(Icons.close, color: Colors.white70, size: 26),),padding: EdgeInsets.all(0),onPressed: Navigator.of(options.context).pop,);}Widget get background {final illustration = options.illustration;return illustration == null? Image.asset(illustrationKey,width: percentW(100),height: percentH(100),fit: BoxFit.fill,): CustomPaint(size: Size(percentW(100), percentH(100)),painter: ImageEditor(image: illustration,),);}Widget get title {if (options.title is Widget) {return Container(width: percentW(100),height: percentH(10),alignment: Alignment.center,child: options.title,);}return Container(alignment: Alignment.center,width: percentW(100),height: percentH(10),child: Opacity(opacity: 0.95,child: AutoSizeText(options.title,maxLines: 1,style: TextStyle(fontSize: Theme.of(options.context).textTheme.headline6?.fontSize,color: primaryColor,fontWeight: FontWeight.bold,),),),);}Widget get content {return options.content is String? AutoSizeText(options.content,minFontSize: 10,style: TextStyle(color: Colors.black87,),): options.content;}Widget? get actions {final actionsList = options.actions;if (actionsList == null || actionsList.length == 0) return null;return Flex(mainAxisAlignment: MainAxisAlignment.center,crossAxisAlignment: CrossAxisAlignment.center,mainAxisSize: MainAxisSize.max,direction: Axis.horizontal,children: actionsList.map((button) => Flexible(flex: 1,child: Padding(padding: EdgeInsets.symmetric(horizontal: 5),child: button,),),).toList(),);}BeautifulPopupButton get button {return ({required String label,required void Function() onPressed,bool outline = false,bool flat = false,TextStyle labelStyle = const TextStyle(),}) {final gradient = LinearGradient(colors: [primaryColor.withOpacity(0.5),primaryColor,]);final double elevation = (outline || flat) ? 0 : 2;final labelColor =(outline || flat) ? primaryColor : Colors.white.withOpacity(0.95);final decoration = BoxDecoration(gradient: (outline || flat) ? null : gradient,borderRadius: BorderRadius.all(Radius.circular(80.0)),border: Border.all(color: outline ? primaryColor : Colors.transparent,width: (outline && !flat) ? 1 : 0,),);final minHeight = 40.0 - (outline ? 2 : 0);return ElevatedButton(// color: Colors.transparent,// elevation: elevation,// highlightElevation: 0,// splashColor: Colors.transparent,child: Ink(decoration: decoration,child: Container(constraints: BoxConstraints(minWidth: 100,minHeight: minHeight,),alignment: Alignment.center,child: Text(label,style: TextStyle(color: labelColor,).merge(labelStyle),),),),// padding: EdgeInsets.all(0),// shape: RoundedRectangleBorder(//   borderRadius: BorderRadius.circular(50),// ),onPressed: onPressed,);};}List<Positioned> get layout;
}class BeautifulPopupTemplateState extends State<BeautifulPopupTemplate> {OverlayEntry? closeEntry;@overridevoid initState() {super.initState();// Display close buttonFuture.delayed(Duration.zero, () {closeEntry = OverlayEntry(builder: (ctx) {final bottom = (MediaQuery.of(context).size.height -widget.height -widget.bodyMargin * 2) /4 -20;return Stack(// overflow: Overflow.visible,clipBehavior: Clip.none,children: <Widget>[Positioned(child: Container(alignment: Alignment.center,child: widget.options.close ?? Container(),),left: 0,right: 0,bottom: bottom,)],);},);final entry = closeEntry;if (entry != null) Overlay.of(context)?.insert(entry);});}@overrideWidget build(BuildContext context) {return Column(mainAxisSize: MainAxisSize.min,mainAxisAlignment: MainAxisAlignment.center,children: <Widget>[Material(color: Colors.transparent,child: Container(margin: EdgeInsets.all(widget.bodyMargin),height: widget.height,width: widget.width,child: Stack(// overflow: Overflow.visible,clipBehavior: Clip.none,children: widget.layout,),),)],);}@overridevoid dispose() {closeEntry?.remove();super.dispose();}
}class ImageEditor extends CustomPainter {ui.Image image;ImageEditor({required this.image,});@overridevoid paint(Canvas canvas, Size size) {canvas.drawImageRect(image,Rect.fromLTRB(0, 0, image.width.toDouble(), image.height.toDouble()),Rect.fromLTRB(0, 0, size.width, size.height),new Paint(),);}@overridebool shouldRepaint(CustomPainter oldDelegate) => false;
}

二、BeautifulPopup

该类中包括了BeautifulPopupTemplate需要的context、_illustration等。

library flutter_component_beautiful_popup;import 'dart:typed_data';import 'package:flutter/material.dart';
import 'dart:ui' as ui;
import 'package:image/image.dart' as img;
import 'package:flutter/services.dart';
import 'templates/Common.dart';
import 'templates/OrangeRocket.dart';
import 'templates/GreenRocket.dart';
import 'templates/OrangeRocket2.dart';
import 'templates/Coin.dart';
import 'templates/BlueRocket.dart';
import 'templates/Thumb.dart';
import 'templates/Gift.dart';
import 'templates/Camera.dart';
import 'templates/Notification.dart';
import 'templates/Geolocation.dart';
import 'templates/Success.dart';
import 'templates/Fail.dart';
import 'templates/Authentication.dart';
import 'templates/Term.dart';
import 'templates/RedPacket.dart';export 'templates/Common.dart';
export 'templates/OrangeRocket.dart';
export 'templates/GreenRocket.dart';
export 'templates/OrangeRocket2.dart';
export 'templates/Coin.dart';
export 'templates/BlueRocket.dart';
export 'templates/Thumb.dart';
export 'templates/Gift.dart';
export 'templates/Camera.dart';
export 'templates/Notification.dart';
export 'templates/Geolocation.dart';
export 'templates/Success.dart';
export 'templates/Fail.dart';
export 'templates/Authentication.dart';
export 'templates/Term.dart';
export 'templates/RedPacket.dart';class BeautifulPopup {BuildContext _context;BuildContext get context => _context;Type? _template;Type? get template => _template;BeautifulPopupTemplate Function(BeautifulPopup options)? _build;BeautifulPopupTemplate get instance {final build = _build;if (build != null) return build(this);switch (template) {case TemplateOrangeRocket:return TemplateOrangeRocket(this);case TemplateGreenRocket:return TemplateGreenRocket(this);case TemplateOrangeRocket2:return TemplateOrangeRocket2(this);case TemplateCoin:return TemplateCoin(this);case TemplateBlueRocket:return TemplateBlueRocket(this);case TemplateThumb:return TemplateThumb(this);case TemplateGift:return TemplateGift(this);case TemplateCamera:return TemplateCamera(this);case TemplateNotification:return TemplateNotification(this);case TemplateGeolocation:return TemplateGeolocation(this);case TemplateSuccess:return TemplateSuccess(this);case TemplateFail:return TemplateFail(this);case TemplateAuthentication:return TemplateAuthentication(this);case TemplateTerm:return TemplateTerm(this);case TemplateRedPacket:default:return TemplateRedPacket(this);}}ui.Image? _illustration;ui.Image? get illustration => _illustration;dynamic title = '';dynamic content = '';List<Widget>? actions;Widget? close;bool? barrierDismissible;Color? primaryColor;BeautifulPopup({required BuildContext context,required Type? template,})   : _context = context,_template = template {primaryColor = instance.primaryColor; // Get the default primary color.}static BeautifulPopup customize({required BuildContext context,required BeautifulPopupTemplate Function(BeautifulPopup options) build,}) {final popup = BeautifulPopup(context: context,template: null,);popup._build = build;return popup;}/// Recolor the BeautifulPopup./// This method is  kind of slow.RFuture<BeautifulPopup> recolor(Color color) async {this.primaryColor = color;final illustrationData = await rootBundle.load(instance.illustrationKey);final buffer = illustrationData.buffer.asUint8List();img.Image? asset;asset = img.readPng(buffer);if (asset != null) {img.adjustColor(asset,saturation: 0,// hue: 0,);img.colorOffset(asset,red: color.red,// I don't know why the effect is nicer with the number ╮(╯▽╰)╭green: color.green ~/ 3,blue: color.blue ~/ 2,alpha: 0,);}final paint = await PaintingBinding.instance?.instantiateImageCodec(asset != null ? Uint8List.fromList(img.encodePng(asset)) : buffer);final nextFrame = await paint?.getNextFrame();_illustration = nextFrame?.image;return this;}/// `title`: Must be a `String` or `Widget`. Defaults to `''`.////// `content`: Must be a `String` or `Widget`. Defaults to `''`.////// `actions`: The set of actions that are displaed at bottom of the dialog,//////  Typically this is a list of [BeautifulPopup.button]. Defaults to `[]`.////// `barrierDismissible`: Determine whether this dialog can be dismissed. Default to `False`.////// `close`: Close widget.Future<T?> show<T>({dynamic title,dynamic content,List<Widget>? actions,bool barrierDismissible = false,Widget? close,}) {this.title = title;this.content = content;this.actions = actions;this.barrierDismissible = barrierDismissible;this.close = close ?? instance.close;final child = WillPopScope(onWillPop: () {return Future.value(barrierDismissible);},child: instance,);return showGeneralDialog<T>(barrierColor: Colors.black38,barrierDismissible: barrierDismissible,barrierLabel: barrierDismissible ? 'beautiful_popup' : null,context: context,pageBuilder: (context, animation1, animation2) {return child;},transitionDuration: Duration(milliseconds: 150),transitionBuilder: (ctx, a1, a2, child) {return Transform.scale(scale: a1.value,child: Opacity(opacity: a1.value,child: child,),);},);}BeautifulPopupButton get button => instance.button;
}

三、根据需要继承BeautifulPopupTemplate

根据需要指定弹窗的样式，例如TemplateGift继承了BeautifulPopupTemplate
重写了button、layout、等方法

import 'package:flutter/material.dart';
import 'package:flutter/cupertino.dart';
import 'Common.dart';
import '../flutter_component_beautiful_popup.dart';/// ![](https://raw.githubusercontent.com/jaweii/Flutter_beautiful_popup/master/img/bg/gift.png)
class TemplateGift extends BeautifulPopupTemplate {final BeautifulPopup options;TemplateGift(this.options) : super(options);@overridefinal illustrationPath = 'img/bg/gift.png';@overrideColor get primaryColor => options.primaryColor ?? Color(0xffFF2F49);@overridefinal maxWidth = 400;@overridefinal maxHeight = 580;@overridefinal bodyMargin = 30;@overrideBeautifulPopupButton get button {return ({required String label,required void Function() onPressed,bool outline = false,bool flat = false,TextStyle labelStyle = const TextStyle(),}) {final gradient = LinearGradient(colors: [primaryColor.withOpacity(0.5),primaryColor,]);final double elevation = (outline || flat) ? 0 : 2;final labelColor =(outline || flat) ? primaryColor : Colors.white.withOpacity(0.95);final decoration = BoxDecoration(gradient: (outline || flat) ? null : gradient,borderRadius: BorderRadius.all(Radius.circular(80.0)),border: Border.all(color: outline ? primaryColor : Colors.transparent,width: (outline && !flat) ? 1 : 0,),);final minHeight = 40.0 - (outline ? 4 : 0);return ElevatedButton(// color: Colors.transparent,// elevation: elevation,// highlightElevation: 0,// splashColor: Colors.transparent,child: Ink(decoration: decoration,child: Container(constraints: BoxConstraints(minWidth: 100,minHeight: minHeight,),alignment: Alignment.center,child: Text(label,style: TextStyle(color: Colors.white.withOpacity(0.95),fontWeight: FontWeight.bold,).merge(labelStyle),),),),// padding: EdgeInsets.all(0),// shape: RoundedRectangleBorder(//   borderRadius: BorderRadius.circular(50),// ),onPressed: onPressed,);};}@overrideget layout {return [Positioned(child: background,),Positioned(top: percentH(26),child: title,),Positioned(top: percentH(36),left: percentW(5),right: percentW(5),height: percentH(actions == null ? 60 : 50),child: content,),Positioned(bottom: percentW(5),left: percentW(5),right: percentW(5),child: actions ?? Container(),),];}
}

四、调用显示弹窗

调用显示弹窗使用的showGeneralDialog，弹出弹窗代码如下

/// `title`: Must be a `String` or `Widget`. Defaults to `''`.////// `content`: Must be a `String` or `Widget`. Defaults to `''`.////// `actions`: The set of actions that are displaed at bottom of the dialog,//////  Typically this is a list of [BeautifulPopup.button]. Defaults to `[]`.////// `barrierDismissible`: Determine whether this dialog can be dismissed. Default to `False`.////// `close`: Close widget.Future<T?> show<T>({dynamic title,dynamic content,List<Widget>? actions,bool barrierDismissible = false,Widget? close,}) {this.title = title;this.content = content;this.actions = actions;this.barrierDismissible = barrierDismissible;this.close = close ?? instance.close;final child = WillPopScope(onWillPop: () {return Future.value(barrierDismissible);},child: instance,);return showGeneralDialog<T>(barrierColor: Colors.black38,barrierDismissible: barrierDismissible,barrierLabel: barrierDismissible ? 'beautiful_popup' : null,context: context,pageBuilder: (context, animation1, animation2) {return child;},transitionDuration: Duration(milliseconds: 150),transitionBuilder: (ctx, a1, a2, child) {return Transform.scale(scale: a1.value,child: Opacity(opacity: a1.value,child: child,),);},);}

这里看到源码后，觉得格式结构很好。可以参考将flutter_beautiful_popup下载后看下源码。地址：https://pub-web.flutter-io.cn/packages/flutter_beautiful_popup

五、小结

flutter开发实战-可扩展popup弹窗template模版样式

学习记录，每天不停进步。

这篇关于flutter开发实战-可扩展popup弹窗template模版样式的文章就介绍到这儿，希望我们推荐的文章对编程师们有所帮助！


http://www.chinasem.cn/article/681291。

相关文章

Python版本信息获取方法详解与实战

Python版本信息获取方法详解与实战

《Python版本信息获取方法详解与实战》在Python开发中,获取Python版本号是调试、兼容性检查和版本控制的重要基础操作,本文详细介绍了如何使用sys和platform模块获取Python的主... 目录1. python版本号获取基础2. 使用sys模块获取版本信息2.1 sys模块概述2.1.1
阅读更多...
一文详解Python如何开发游戏

一文详解Python如何开发游戏

《一文详解Python如何开发游戏》Python是一种非常流行的编程语言,也可以用来开发游戏模组,：本文主要介绍Python如何开发游戏的相关资料,文中通过代码介绍的非常详细,需要的朋友可以参考下... 目录一、python简介二、Python 开发 2D 游戏的优劣势优势缺点三、Python 开发 3D
阅读更多...
基于Python开发Windows自动更新控制工具

基于Python开发Windows自动更新控制工具

《基于Python开发Windows自动更新控制工具》在当今数字化时代,操作系统更新已成为计算机维护的重要组成部分,本文介绍一款基于Python和PyQt5的Windows自动更新控制工具,有需要的可... 目录设计原理与技术实现系统架构概述数学建模工具界面完整代码实现技术深度分析多层级控制理论服务层控制注
阅读更多...
Python爬虫HTTPS使用requests,httpx,aiohttp实战中的证书异步等问题

Python爬虫HTTPS使用requests,httpx,aiohttp实战中的证书异步等问题

《Python爬虫HTTPS使用requests,httpx,aiohttp实战中的证书异步等问题》在爬虫工程里,“HTTPS”是绕不开的话题,HTTPS为传输加密提供保护,同时也给爬虫带来证书校验、... 目录一、核心问题与优先级检查（先问三件事）二、基础示例：requests 与证书处理三、高并发选型：
阅读更多...
Java中的分布式系统开发基于 Zookeeper 与 Dubbo 的应用案例解析

Java中的分布式系统开发基于 Zookeeper 与 Dubbo 的应用案例解析

《Java中的分布式系统开发基于Zookeeper与Dubbo的应用案例解析》本文将通过实际案例,带你走进基于Zookeeper与Dubbo的分布式系统开发,本文通过实例代码给大家介绍的非常详... 目录Java 中的分布式系统开发基于 Zookeeper 与 Dubbo 的应用案例一、分布式系统中的挑战二
阅读更多...
Oracle Scheduler任务故障诊断方法实战指南

Oracle Scheduler任务故障诊断方法实战指南

《OracleScheduler任务故障诊断方法实战指南》Oracle数据库作为企业级应用中最常用的关系型数据库管理系统之一,偶尔会遇到各种故障和问题,：本文主要介绍OracleSchedul... 目录前言一、故障场景：当定时任务突然“消失”二、基础环境诊断：搭建“全局视角”1. 数据库实例与PDB状态2
阅读更多...
Git进行版本控制的实战指南

Git进行版本控制的实战指南

《Git进行版本控制的实战指南》Git是一种分布式版本控制系统,广泛应用于软件开发中,它可以记录和管理项目的历史修改,并支持多人协作开发,通过Git,开发者可以轻松地跟踪代码变更、合并分支、回退版本等... 目录一、Git核心概念解析二、环境搭建与配置1. 安装Git（Windows示例）2. 基础配置（必
阅读更多...
基于Go语言开发一个 IP 归属地查询接口工具

基于Go语言开发一个 IP 归属地查询接口工具

《基于Go语言开发一个IP归属地查询接口工具》在日常开发中,IP地址归属地查询是一个常见需求,本文将带大家使用Go语言快速开发一个IP归属地查询接口服务,有需要的小伙伴可以了解下... 目录功能目标技术栈项目结构核心代码（main.go）使用方法扩展功能总结在日常开发中，IP 地址归属地查询是一个常见需求：
阅读更多...
基于 Cursor 开发 Spring Boot 项目详细攻略

基于 Cursor 开发 Spring Boot 项目详细攻略

《基于Cursor开发SpringBoot项目详细攻略》Cursor是集成GPT4、Claude3.5等LLM的VSCode类AI编程工具,支持SpringBoot项目开发全流程,涵盖环境配... 目录cursor是什么？基于 Cursor 开发 Spring Boot 项目完整指南1. 环境准备2. 创建
阅读更多...
MyBatis分页查询实战案例完整流程

MyBatis分页查询实战案例完整流程

《MyBatis分页查询实战案例完整流程》MyBatis是一个强大的Java持久层框架,支持自定义SQL和高级映射,本案例以员工工资信息管理为例,详细讲解如何在IDEA中使用MyBatis结合Page... 目录1. MyBATis框架简介2. 分页查询原理与应用场景2.1 分页查询的基本原理2.1.1 分
阅读更多...

Copyright China编程 23002807@qq.com

沪ICP备2023033072号-2