snapshot of https://github.com/flutter/samples.git (main, 2026-09-16; blobs > 131072B omitted)

dynamic_theme/lib/widgets/api_key_widget.dart

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+// Copyright 2024 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import 'package:flutter/material.dart';
+import 'package:url_launcher/link.dart';
+
+import 'text_field_decoration.dart';
+
+class ApiKeyWidget extends StatelessWidget {
+  ApiKeyWidget({super.key, required this.onSubmitted, required this.title});
+
+  final String title;
+  final ValueChanged<String> onSubmitted;
+  final _textController = TextEditingController();
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(title: Text(title)),
+      body: Center(
+        child: Padding(
+          padding: const EdgeInsets.all(8.0),
+          child: Column(
+            mainAxisSize: MainAxisSize.min,
+            children: [
+              const Text(
+                'To use the Gemini API, you\'ll need an API key. '
+                'If you don\'t already have one, '
+                'create a key in Google AI Studio.',
+                textAlign: TextAlign.center,
+              ),
+              const SizedBox(height: 8),
+              Link(
+                uri: Uri.https('aistudio.google.com', '/app/apikey'),
+                target: LinkTarget.blank,
+                builder: (context, followLink) => TextButton(
+                  onPressed: followLink,
+                  child: const Text('Get an API Key'),
+                ),
+              ),
+            ],
+          ),
+        ),
+      ),
+      bottomNavigationBar: BottomAppBar(
+        padding: const EdgeInsets.all(8),
+        child: Row(
+          children: [
+            Expanded(
+              child: TextField(
+                decoration: textFieldDecoration(context, 'Enter your API key'),
+                controller: _textController,
+                obscureText: true,
+                onSubmitted: (value) {
+                  onSubmitted(value);
+                },
+              ),
+            ),
+            const SizedBox(height: 8),
+            TextButton(
+              onPressed: () {
+                onSubmitted(_textController.value.text);
+              },
+              child: const Text('Submit'),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+}

dynamic_theme/lib/widgets/message_widget.dart

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+// Copyright 2024 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import 'package:flutter/material.dart';
+import 'package:flutter_markdown/flutter_markdown.dart';
+
+class MessageWidget extends StatelessWidget {
+  const MessageWidget({
+    super.key,
+    this.text,
+    this.image,
+    required this.isFromUser,
+  });
+
+  final Image? image;
+  final String? text;
+  final bool isFromUser;
+
+  @override
+  Widget build(BuildContext context) {
+    return Row(
+      mainAxisAlignment: isFromUser
+          ? MainAxisAlignment.end
+          : MainAxisAlignment.start,
+      children: [
+        Flexible(
+          child: Container(
+            constraints: const BoxConstraints(maxWidth: 520),
+            decoration: BoxDecoration(
+              color: isFromUser
+                  ? Theme.of(context).colorScheme.primaryContainer
+                  : Theme.of(context).colorScheme.surfaceContainerHighest,
+              borderRadius: BorderRadius.circular(18),
+            ),
+            padding: const EdgeInsets.symmetric(vertical: 15, horizontal: 20),
+            margin: const EdgeInsets.only(bottom: 8),
+            child: Column(
+              children: [
+                if (text case final text?) MarkdownBody(data: text),
+                ?image,
+              ],
+            ),
+          ),
+        ),
+      ],
+    );
+  }
+}

dynamic_theme/lib/widgets/text_field_decoration.dart

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+// Copyright 2024 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import 'package:flutter/material.dart';
+
+InputDecoration textFieldDecoration(BuildContext context, String hintText) {
+  return InputDecoration(
+    contentPadding: const EdgeInsets.all(15),
+    hintText: hintText,
+    border: OutlineInputBorder(
+      borderRadius: const BorderRadius.all(Radius.circular(14)),
+      borderSide: BorderSide(color: Theme.of(context).colorScheme.secondary),
+    ),
+    focusedBorder: OutlineInputBorder(
+      borderRadius: const BorderRadius.all(Radius.circular(14)),
+      borderSide: BorderSide(color: Theme.of(context).colorScheme.secondary),
+    ),
+  );
+}