import 'package:flutter/material.dart';

void main() => runApp(MyApp());

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> with WidgetsBindingObserver {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Title',
      home: Scaffold(
        appBar: AppBar(
          actions: [
            Builder(
              builder: (context) => IconButton(
                icon: Icon(Icons.search),
                onPressed: () => showSearch(context: context, delegate: CustomSearchDelegate()),
              ),
            ),
          ],
        ),
      ),
    );
  }
}

class CustomSearchDelegate extends SearchDelegate {
  @override
  List<Widget> buildActions(BuildContext context) => [
        if (query.isNotEmpty)
          IconButton(
            icon: Icon(Icons.close),
            onPressed: () {
              query = "";
              showSuggestions(context);
            },
          )
      ];

  @override
  Widget buildLeading(BuildContext context) => IconButton(
        tooltip: 'Back',
        icon: AnimatedIcon(icon: AnimatedIcons.menu_arrow, progress: transitionAnimation),
        onPressed: () => close(context, null),
      );

  @override
  Widget buildSuggestions(BuildContext context) => Text("Suggestions go here");

  @override
  Widget buildResults(BuildContext context) => Text("Results go here");

  @override
  ThemeData appBarTheme(BuildContext context) {
    final ThemeData theme = Theme.of(context);
    return theme.copyWith(
      primaryColor: Colors.white,
      primaryIconTheme: theme.primaryIconTheme.copyWith(color: Colors.green),
      primaryColorBrightness: Brightness.dark,
      textTheme: theme.textTheme.copyWith(
        title: TextStyle(fontWeight: FontWeight.normal),
      ),
      // these ↓ do not work ☹️
      appBarTheme: theme.appBarTheme.copyWith(color: Colors.black12, elevation: 0),
      inputDecorationTheme: theme.inputDecorationTheme.copyWith(
         focusedBorder: OutlineInputBorder(
            borderSide: BorderSide(
            color: Colors.red,
            width: 1,
           style: BorderStyle.solid,
         ),
        borderRadius: BorderRadius.all(Radius.circular(24)),
        gapPadding: 4,
      ),
      ),
    );
  }
}

Running "flutter pub get" in muqel-front...                         0,6s
Analyzing muqel-front...                                                
No issues found! (ran in 2.6s)

[✓] Flutter (Channel stable, v1.9.1+hotfix.6, on Mac OS X 10.15.1 19B88, locale fr-FR)
    • Flutter version 1.9.1+hotfix.6 at /Users/fahembelili/Development/flutter
    • Framework revision 68587a0916 (2 months ago), 2019-09-13 19:46:58 -0700
    • Engine revision b863200c37
    • Dart version 2.5.0

[✓] Android toolchain - develop for Android devices (Android SDK version 29.0.2)
    • Android SDK at /Users/fahembelili/Library/Android/sdk
    • Android NDK location not configured (optional; useful for native profiling support)
    • Platform android-29, build-tools 29.0.2
    • ANDROID_HOME = /Users/fahembelili/Library/Android/sdk
    • Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 1.8.0_202-release-1483-b49-5587405)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 11.2.1)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Xcode 11.2.1, Build version 11B500
    • CocoaPods version 1.7.5

[✓] Android Studio (version 3.5)
    • Android Studio at /Applications/Android Studio.app/Contents
    • Flutter plugin version 41.1.2
    • Dart plugin version 191.8593
    • Java version OpenJDK Runtime Environment (build 1.8.0_202-release-1483-b49-5587405)

[!] IntelliJ IDEA Community Edition (version 2019.2.4)
    • IntelliJ at /Applications/IntelliJ IDEA CE.app
    ✗ Flutter plugin not installed; this adds Flutter specific functionality.
    ✗ Dart plugin not installed; this adds Dart specific functionality.
    • For information about installing plugins, see
      https://flutter.dev/intellij-setup/#installing-the-plugins

[✓] VS Code (version 1.40.1)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.6.0

[✓] Connected device (1 available)
    • AOSP on IA Emulator • emulator-5554 • android-x86 • Android 9 (API 28) (emulator)

! Doctor found issues in 1 category.