Flutter窗口焦点管理插件win

Flutter窗口焦点管理插件win_focuse的使用

获取开始

本项目是一个用于Flutter的插件，特别包含针对Windows平台的实现代码。

该插件使用IUIAutomation来捕获屏幕上的任何文本，并将其输出到Flutter应用中。

示例代码

以下是一个完整的示例代码，展示了如何在Flutter应用中使用win_focuse插件来跟踪窗口焦点。

import 'package:flutter/material.dart';
import 'dart:async';

import 'package:flutter/services.dart';
import 'package:win_focuse/win_focuse.dart';

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

class MyApp extends StatefulWidget {
  const MyApp({super.key});

  [@override](/user/override)
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  String _platformVersion = '未知';
  final _winPlugin = WinFocuse();

  [@override](/user/override)
  void initState() {
    super.initState();
    initPlatformState();
    startTrackingFocus();
  }

  void startTrackingFocus() async {
    while (true) {
      var result = await _winPlugin.StartTrackingFocus();
      if (result != null) {
        setState(() {
          _platformVersion = result;
        });
      }
      await Future.delayed(Duration(seconds: 1)); // 定义所需的延迟时间
    }
  }

  // 平台消息是异步的，因此我们在一个异步方法中进行初始化。
  Future<void> initPlatformState() async {
    String platformVersion;
    // 平台消息可能会失败，所以我们使用try/catch来处理PlatformException。
    // 我们还处理了消息可能返回null的情况。
    try {
      _winPlugin.InitializeUIAutomation();
      platformVersion = await _winPlugin.StartTrackingFocus() ?? '未知平台版本';
    } on PlatformException {
      platformVersion = '获取平台版本失败。';
    }

    // 如果在异步平台消息飞行时小部件从树中移除，我们希望丢弃回复而不是调用setState来更新我们的不存在的外观。
    if (!mounted) return;

    setState(() {
      _platformVersion = platformVersion;
    });
  }

  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('插件示例应用'),
        ),
        body: Center(
          child: Text('运行于: $_platformVersion\n'),
        ),
      ),
    );
  }
}

说明

导入必要的库：

import 'package:flutter/material.dart';
import 'dart:async';
import 'package:flutter/services.dart';
import 'package:win_focuse/win_focuse.dart';

定义主应用类：

class MyApp extends StatefulWidget {
  const MyApp({super.key});

  [@override](/user/override)
  State<MyApp> createState() => _MyAppState();
}

定义状态类：

class _MyAppState extends State<MyApp> {
  String _platformVersion = '未知';
  final _winPlugin = WinFocuse();

初始化状态：

[@override](/user/override)
void initState() {
  super.initState();
  initPlatformState();
  startTrackingFocus();
}

启动焦点跟踪：

void startTrackingFocus() async {
  while (true) {
    var result = await _winPlugin.StartTrackingFocus();
    if (result != null) {
      setState(() {
        _platformVersion = result;
      });
    }
    await Future.delayed(Duration(seconds: 1)); // 定义所需的延迟时间
  }
}

初始化平台状态：

Future<void> initPlatformState() async {
  String platformVersion;
  try {
    _winPlugin.InitializeUIAutomation();
    platformVersion = await _winPlugin.StartTrackingFocus() ?? '未知平台版本';
  } on PlatformException {
    platformVersion = '获取平台版本失败。';
  }

  if (!mounted) return;

  setState(() {
    _platformVersion = platformVersion;
  });
}

构建应用界面：

[@override](/user/override)
Widget build(BuildContext context) {
  return MaterialApp(
    home: Scaffold(
      appBar: AppBar(
        title: const Text('插件示例应用'),
      ),
      body: Center(
        child: Text('运行于: $_platformVersion\n'),
      ),
    ),
  );
}

更多关于Flutter窗口焦点管理插件win_focuse的使用的实战教程也可以访问 https://www.itying.com/category-92-b0.html

zlyuanteng 1楼

更多关于Flutter窗口焦点管理插件win_focuse的使用的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html

win_focus 是一个用于管理 Flutter 桌面应用程序窗口焦点的插件。它允许你控制窗口的焦点行为，例如获取焦点、失去焦点、最小化窗口等。以下是如何使用 win_focus 插件的基本步骤：

1. 添加依赖

首先，你需要在 pubspec.yaml 文件中添加 win_focus 插件的依赖：

dependencies:
  flutter:
    sdk: flutter
  win_focus: ^0.1.0  # 请使用最新版本

然后运行 flutter pub get 来获取依赖。

2. 导入包

在你的 Dart 文件中导入 win_focus 包：

import 'package:win_focus/win_focus.dart';

3. 使用插件

win_focus 插件提供了几个方法来管理窗口焦点。以下是一些常见的用法：

获取窗口焦点

你可以使用 WinFocus.focus() 方法将焦点设置到当前窗口：

void focusWindow() async {
  try {
    await WinFocus.focus();
    print('Window focused successfully');
  } catch (e) {
    print('Failed to focus window: $e');
  }
}

最小化窗口

你可以使用 WinFocus.minimize() 方法将当前窗口最小化：

void minimizeWindow() async {
  try {
    await WinFocus.minimize();
    print('Window minimized successfully');
  } catch (e) {
    print('Failed to minimize window: $e');
  }
}

恢复窗口

你可以使用 WinFocus.restore() 方法将最小化的窗口恢复到正常状态：

void restoreWindow() async {
  try {
    await WinFocus.restore();
    print('Window restored successfully');
  } catch (e) {
    print('Failed to restore window: $e');
  }
}

检查窗口是否聚焦

你可以使用 WinFocus.isFocused() 方法来检查当前窗口是否具有焦点：

void checkWindowFocus() async {
  try {
    bool isFocused = await WinFocus.isFocused();
    print('Window is focused: $isFocused');
  } catch (e) {
    print('Failed to check window focus: $e');
  }
}

4. 完整示例

以下是一个完整的示例，展示了如何使用 win_focus 插件来管理窗口焦点：

import 'package:flutter/material.dart';
import 'package:win_focus/win_focus.dart';

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

class MyApp extends StatelessWidget {
  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text('WinFocus Example'),
        ),
        body: Center(
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: [
              ElevatedButton(
                onPressed: () async {
                  try {
                    await WinFocus.focus();
                    print('Window focused successfully');
                  } catch (e) {
                    print('Failed to focus window: $e');
                  }
                },
                child: Text('Focus Window'),
              ),
              ElevatedButton(
                onPressed: () async {
                  try {
                    await WinFocus.minimize();
                    print('Window minimized successfully');
                  } catch (e) {
                    print('Failed to minimize window: $e');
                  }
                },
                child: Text('Minimize Window'),
              ),
              ElevatedButton(
                onPressed: () async {
                  try {
                    await WinFocus.restore();
                    print('Window restored successfully');
                  } catch (e) {
                    print('Failed to restore window: $e');
                  }
                },
                child: Text('Restore Window'),
              ),
              ElevatedButton(
                onPressed: () async {
                  try {
                    bool isFocused = await WinFocus.isFocused();
                    print('Window is focused: $isFocused');
                  } catch (e) {
                    print('Failed to check window focus: $e');
                  }
                },
                child: Text('Check Window Focus'),
              ),
            ],
          ),
        ),
      ),
    );
  }
}