Flutter功能未知插件capp的探索使用

发布于 1周前 作者 wuwangju 来自 Flutter

Flutter功能未知插件capp的探索使用

Capp - Console Application Package

Capp 是一个强大的Dart包，旨在简化交互式控制台应用程序的开发。它具有处理用户输入、生成帮助信息、管理参数和创建视觉结构化输出（如表格和进度指示器）的功能。

功能特性

  • 元素支持

    • 进度指示器
    • 是/否输入框
    • 文本/数字输入框
    • 多选输入框
    • 多选项选择器
    • 表格视图
    • JSON查看器

  • 功能特点

    • 参数和选项管理：轻松定义和管理命令行参数和选项。
    • 用户输入处理：支持带有提示和选择选项的用户输入读取。
    • 结构化输出：在控制台中显示表格、彩色消息和各种进度指示器。
    • 帮助生成：为你的控制台命令和选项自动生成帮助指南。

快速开始

  1. 将capp添加到你的pubspec.yaml文件中。
  2. 导入package:capp/capp.dart。
  3. 创建命令、选项和用户输入来构建你的交互式控制台应用。

示例代码

以下是一个完整的示例代码，展示了如何使用Capp创建一个交互式的控制台应用：

import "dart:io";
import "package:capp/capp.dart";

void main([List<String> args = const []]) {
  var app = CappManager(
    main: CappController(
      '',
      options: [
        CappOption(
          name: 'help',
          shortName: 'h',
          description: 'Show help',
        ),
      ],
      run: (c) async {
        if (c.existsOption('help')) {
          return CappConsole(c.manager.getHelp());
        } else {
          return test(c);
        }
      },
    ),
    args: args,
    controllers: [
      CappController(
        'test',
        options: [],
        run: test,
      ),
    ],
  );

  app.process();
}

Future<CappConsole> test(CappController c) async {
  const options = [
    'Progress circle',
    'Progress bar',
    'Progress spinner',
    'Progress timer',
    'Yes/No questions',
    'Input text',
    'Make a table',
    'Multi Choice',
    'Json Viewer',
    'Menu',
    'Clear screen',
    'Help',
    'Exit',
  ];
  var select = CappConsole.select(
    'Select an option to test Widgets of console:',
    options,
  );
  CappConsole.write('Your selection is: $select', CappColors.success);

  // Progress circle
  if (select == 'Progress circle') {
    await CappConsole.progress(
      'I am waiting here for 5 seconds!',
      () async => Future.delayed(Duration(seconds: 5)),
      type: CappProgressType.circle,
    );
  }
  // Progress bar
  else if (select == 'Progress bar') {
    await CappConsole.progress(
      'I am waiting here for 5 seconds!',
      () async => Future.delayed(Duration(seconds: 5)),
      type: CappProgressType.bar,
    );
  }
  // Progress spinner
  else if (select == 'Progress spinner') {
    await CappConsole.progress(
      'I am waiting here for 5 seconds!',
      () async => Future.delayed(Duration(seconds: 5)),
      type: CappProgressType.spinner,
    );
  }
  // Progress timer
  else if (select == 'Progress timer') {
    await CappConsole.progress(
      'I am waiting here for 5 seconds!',
      () async => Future.delayed(Duration(seconds: 5)),
      type: CappProgressType.timer,
    );
  }
  // Yes/No Questions
  else if (select == 'Yes/No questions') {
    final res = await CappConsole.yesNo('Do you agree? ');
    CappConsole.write(
      "Your answer is ${res ? 'YES' : 'NO'}",
      CappColors.warning,
    );
  }
  // Input text
  else if (select == 'Input text') {
    var age = CappConsole.read(
      'What is your age?',
      isRequired: true,
      isNumber: true,
    );

    CappConsole.write(
      "Your age is: $age",
      CappColors.success,
    );
  }
  // Make a table
  else if (select == 'Make a table') {
    const table = [
      ['#', 'Name', 'Age', 'City', 'Job'],
      ['1', 'Farhad', '38', 'Amsterdam', 'Engineer'],
      ['2', 'Adrian', '25', 'Berlin', 'Teacher'],
      ['3', 'Arian', '33', 'Frankfort', 'Taxi driver']
    ];

    CappConsole.writeTable(table);

    CappConsole.writeTable(
      table,
      color: CappColors.warning,
      doubleBorder: true,
    );
  }
  // Clear Screen
  else if (select == 'Clear screen') {
    CappConsole.clear();
  }

  // Multi choice
  else if (select == 'Multi Choice') {
    final res = await CappConsole.readMultiChoice(
      'Select your favorite colors:',
      ['Red', 'Green', 'Blue', 'Yellow', 'Black', 'White'],
      color: CappColors.warning,
      selected: ['Red', 'Blue', 'White'],
      required: true,
    );

    CappConsole.write(
      "Your favorite colors are: ${res.join(', ')}",
      CappColors.success,
    );
  }

  // Json Viewer
  else if (select == 'Json Viewer') {
    final json = {
      'name': 'Farhad',
      'age': 38,
      'city': 'Amsterdam',
      'job': 'Engineer',
      'skills': ['Dart', 'Flutter', 'Java', 'Kotlin', 'Swift'],
      'isMarried': true,
      'children': [
        {'name': 'Ali', 'age': 10},
        {'name': 'Sara', 'age': 8},
      ],
      'time': DateTime.now(),
    };

    CappConsole.writeJson(json, pretty: true, color: CappColors.warning);
  }

  // Menu
  else if (select == 'Menu') {
    final menu = {
      'Test timer': () async => {
            await CappConsole.progress(
              "Test Timer",
              () => Future.delayed(Duration(seconds: 5)),
              type: CappProgressType.timer,
            ),
          },
      'Exit app': () => exit(0),
      'Back': () {},
    };

    await CappConsole.menuChoice("Test Menu", menu, color: CappColors.warning);
  }

  // Help
  else if (select == 'Help') {
    CappConsole.write(c.manager.getHelp());
  } else if (select == options.last) {
    return CappConsole('Exit!');
  }

  return test(c);
}

示例输出

以下是运行上述代码后可能的控制台输出示例：

$ dart ./example/example.dart


Select an option to test Widgets of console:

  [1]. Progress circle
  [2]. Progress bar
  [3]. Progress spinner
  [4]. Progress timer
  [5]. Yes/No questions
  [6]. Input text
  [7]. Make a table
  [8]. Multi Choice
  [9]. Json Viewer
  [10]. Menu
  [11]. Clear screen
  [12]. Help
  [13]. Exit


Enter the number of the option: 1
Your selection is: Progress circle
I am waiting here for 5 seconds!               ⢿                            


Select an option to test Widgets of console:

  [1]. Progress circle
  [2]. Progress bar
  [3]. Progress spinner
  [4]. Progress timer
  [5]. Yes/No questions
  [6]. Input text
  [7]. Make a table
  [8]. Multi Choice
  [9]. Json Viewer
  [10]. Menu
  [11]. Clear screen
  [12]. Help
  [13]. Exit


Enter the number of the option: 2
Your selection is: Progress bar
I am waiting here for 5 seconds! █████░████████                            


Select an option to test Widgets of console:

  [1]. Progress circle
  [2]. Progress bar
  [3]. Progress spinner
  [4]. Progress timer
  [5]. Yes/No questions
  [6]. Input text
  [7]. Make a table
  [8]. Multi Choice
  [9]. Json Viewer
  [10]. Menu
  [11]. Clear screen
  [12]. Help
  [13]. Exit


Enter the number of the option: 3
Your selection is: Progress spinner
I am waiting here for 5 seconds! |-----&gt;-------|                          


Select an option to test Widgets of console:

  [1]. Progress circle
  [2]. Progress bar
  [3]. Progress spinner
  [4]. Progress timer
  [5]. Yes/No questions
  [6]. Input text
  [7]. Make a table
  [8]. Multi Choice
  [9]. Json Viewer
  [10]. Menu
  [11]. Clear screen
  [12]. Help
  [13]. Exit


Enter the number of the option: 4
Your selection is: Progress timer
I am waiting here for 5 seconds! 00:05


Select an option to test Widgets of console:

  [1]. Progress circle
  [2]. Progress bar
  [3]. Progress spinner
  [4]. Progress timer
  [5]. Yes/No questions
  [6]. Input text
  [7]. Make a table
  [8]. Multi Choice
  [9]. Json Viewer
  [10]. Menu
  [11]. Clear screen
  [12]. Help
  [13]. Exit


Enter the number of the option: 5
Your selection is: Yes/No questions


Do you agree?  (y/n): N
Your answer is NO


Select an option to test Widgets of console:

  [1]. Progress circle
  [2]. Progress bar
  [3]. Progress spinner
  [4]. Progress timer
  [5]. Yes/No questions
  [6]. Input text
  [7]. Make a table
  [8]. Multi Choice
  [9]. Json Viewer
  [10]. Menu
  [11]. Clear screen
  [12]. Help
  [13]. Exit


Enter the number of the option: 6
Your selection is: Input text


What is your age? 33
Your age is: 33


Select an option to test Widgets of console:

  [1]. Progress circle
  [2]. Progress bar
  [3]. Progress spinner
  [4]. Progress timer
  [5]. Yes/No questions
  [6]. Input text
  [7]. Make a table
  [8]. Multi Choice
  [9]. Json Viewer
  [10]. Menu
  [11]. Clear screen
  [12]. Help
  [13]. Exit


Enter the number of the option: 7
Your selection is: Make a table
┌───┬────────┬─────┬────────────┬─────────────┐
│ # │  Name  │ Age │    City    │     Job     │
├───┼────────┼─────┼────────────┼─────────────┤
│ 1 │ Farhad │ 38  │ Amsterdam  │ Engineer    │
├───┼────────┼─────┼────────────┼─────────────┤
│ 2 │ Adrian │ 25  │ Berlin     │ Teacher     │
├───┼────────┼─────┼────────────┼─────────────┤
│ 3 │ Arian  │ 33  │ Frankfort  │ Taxi driver │
└───┴────────┴─────┴────────────┴─────────────┘

╔═══╦════════╦═════╦════════════╦═════════════╗
║ # ║  Name  ║ Age ║    City    ║     Job     ║
╠═══╬════════╬═════╬════════════╬═════════════╣
║ 1 ║ Farhad ║ 38  ║ Amsterdam  ║ Engineer    ║
╠═══╬════════╬═════╬════════════╬═════════════╣
║ 2 ║ Adrian ║ 25  ║ Berlin     ║ Teacher     ║
╠═══╬════════╬═════╬════════════╬═════════════╣
║ 3 ║ Arian  ║ 33  ║ Frankfort  ║ Taxi driver ║
╚═══╩════════╩═════╩════════════╩═════════════╝



Select an option to test Widgets of console:

  [1]. Progress circle
  [2]. Progress bar
  [3]. Progress spinner
  [4]. Progress timer
  [5]. Yes/No questions
  [6]. Input text
  [7]. Make a table
  [8]. Multi Choice
  [9]. Json Viewer
  [10]. Menu
  [11]. Clear screen
  [12]. Help
  [13]. Exit


Enter the number of the option: 8
Your selection is: Multi Choice
Select your favorite colors:
[✓] Red
[ ] Green
[✓] Blue
[ ] Yellow
[ ] Black
[✓] White
Your favorite colors are: Red, Blue, White


Select an option to test Widgets of console:

  [1]. Progress circle
  [2]. Progress bar
  [3]. Progress spinner
  [4]. Progress timer
  [5]. Yes/No questions
  [6]. Input text
  [7]. Make a table
  [8]. Multi Choice
  [9]. Json Viewer
  [10]. Menu
  [11]. Clear screen
  [12]. Help
  [13]. Exit


Enter the number of the option: 9
Your selection is: Json Viewer
{
  "name": "Farhad",
  "age": 38,
  "city": "Amsterdam",
  "job": "Engineer",
  "skills": [
    "Dart",
    "Flutter",
    "Java",
    "Kotlin",
    "Swift"
  ],
  "isMarried": true,
  "children": [
    {
      "name": "Ali",
      "age": 10
    },
    {
      "name": "Sara",
      "age": 8
    }
  ],
  "time": "2023-10-01T12:34:56.789Z"
}


Select an option to test Widgets of console:

  [1]. Progress circle
  [2]. Progress bar
  [3]. Progress spinner
  [4]. Progress timer
  [5]. Yes/No questions
  [6]. Input text
  [7]. Make a table
  [8]. Multi Choice
  [9]. Json Viewer
  [10]. Menu
  [11]. Clear screen
  [12]. Help
  [13]. Exit


Enter the number of the option: 10
Your selection is: Menu
Test Menu
[1] Test timer
[2] Exit app
[3] Back
Enter the number of the option: 1
I am waiting here for 5 seconds! 00:05


Select an option to test Widgets of console:

  [1]. Progress circle
  [2]. Progress bar
  [3]. Progress spinner
  [4]. Progress timer
  [5]. Yes/No questions
  [6]. Input text
  [7]. Make a table
  [8]. Multi Choice
  [9]. Json Viewer
  [10]. Menu
  [11]. Clear screen
  [12]. Help
  [13]. Exit


Enter the number of the option: 11
Your selection is: Clear screen

通过这个示例代码，你可以看到Capp包的强大功能和灵活性，它能够帮助你快速构建出功能丰富的控制台应用程序。希望这篇帖子能帮助你更好地理解和使用Capp插件！


更多关于Flutter功能未知插件capp的探索使用的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html

Harmonyos Next教程
1 回复

更多关于Flutter功能未知插件capp的探索使用的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html


在探索使用Flutter中的未知插件capp时，了解其基本用法和功能是非常重要的。由于capp并非一个广泛认知的官方或知名社区插件，这里我将展示一种通用的方法来探索和使用一个Flutter插件，包括如何集成、初始化以及调用其基本功能。请注意，具体代码可能需要根据capp插件的实际API进行调整。

步骤 1: 添加插件依赖

首先，你需要在pubspec.yaml文件中添加capp插件的依赖。由于我们不知道capp的确切依赖项名称和版本，这里假设它的名称就是capp，并且有一个可用的版本（例如^1.0.0）。

dependencies:
  flutter:
    sdk: flutter
  capp: ^1.0.0  # 假设的版本号，实际使用时请替换为正确版本

然后运行flutter pub get来安装依赖。

步骤 2: 导入插件并初始化

在你的Dart代码中，你需要导入capp插件并进行初始化。由于我们不知道capp的具体初始化方法，这里提供一个假设性的示例。

import 'package:flutter/material.dart';
import 'package:capp/capp.dart';  // 假设的导入路径

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatefulWidget {
  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  @override
  void initState() {
    super.initState();
    // 假设capp有一个初始化方法initCapp()
    Capp.initCapp().then((result) {
      // 处理初始化结果
      print('Capp initialized: $result');
    }).catchError((error) {
      // 处理初始化错误
      print('Failed to initialize Capp: $error');
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Flutter Capp Demo'),
      ),
      body: Center(
        child: Text('Check console for Capp initialization status'),
      ),
    );
  }
}

步骤 3: 调用插件功能

一旦插件初始化成功，你可以开始调用它的功能。这里同样提供一个假设性的示例，假设capp有一个方法performAction。

class _MyHomePageState extends State<MyHomePage> {
  // ...（之前的代码保持不变）

  void _performCappAction() async {
    try {
      var result = await Capp.performAction('some_action_id', parameters: {'key': 'value'});
      print('Capp action result: $result');
    } catch (error) {
      print('Failed to perform Capp action: $error');
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Flutter Capp Demo'),
      ),
      body: Center(
        child: ElevatedButton(
          onPressed: _performCappAction,
          child: Text('Perform Capp Action'),
        ),
      ),
    );
  }
}

注意事项

  1. 查阅文档：由于capp是一个未知插件，强烈建议查阅其官方文档或源代码以了解正确的初始化方法和API调用方式。
  2. 错误处理：在调用插件功能时，务必添加适当的错误处理逻辑，以处理可能的异常情况。
  3. 更新依赖：如果capp插件有更新，请及时更新你的pubspec.yaml文件中的依赖版本。

由于capp插件的具体信息未知，上述代码仅为示例性质，实际使用时请根据插件的实际API进行调整。

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