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lib/v12/pages/login/login_button.dart

@@ -0,0 +1,40 @@
+import 'package:flutter/cupertino.dart';
+import 'package:flutter/material.dart';
+import '../../app/authentication/auth_scope.dart';
+
+class LoginButton extends StatelessWidget {
+  final VoidCallback onLogin;
+  const LoginButton({super.key, required this.onLogin});
+
+  @override
+  Widget build(BuildContext context) {
+    const TextStyle style = TextStyle(fontSize: 16, fontWeight: FontWeight.bold);
+    AuthResult authResult = AuthScope.of(context);
+    VoidCallback? action;
+    Widget child;
+    switch (authResult.status) {
+      case AuthStatus.none:
+      case AuthStatus.success:
+      case AuthStatus.failed:
+      case AuthStatus.waitingLoginOut:
+        action = onLogin;
+        child = const Text('登 录', style: style);
+        break;
+      case AuthStatus.waitingLogin:
+        action = null;
+        child = const Wrap(
+          spacing: 8,
+          children: [
+            CupertinoActivityIndicator(radius: 10),
+            Text('登录中...', style: style)
+          ],
+        );
+    }
+
+    return ElevatedButton(
+        style: ElevatedButton.styleFrom(
+            shape: const StadiumBorder(), minimumSize: const Size(320, 52)),
+        onPressed: action,
+        child: child);
+  }
+}