update form

MainAppDMT/lib/screens/Form/form.dart

+import 'package:DMTI_app/screens/Form/user.dart';
+import 'package:flutter/material.dart';
+
+typedef OnDelete();
+
+class UserForm extends StatefulWidget {
+  final User user;
+  final state = _UserFormState();
+  final OnDelete onDelete;
+
+  UserForm({Key key, this.user, this.onDelete}) : super(key: key);
+  @override
+  _UserFormState createState() => state;
+
+  bool isValid() => state.validate();
+}
+
+class _UserFormState extends State<UserForm> {
+  final form = GlobalKey<FormState>();
+
+  @override
+  Widget build(BuildContext context) {
+    return Padding(
+      padding: EdgeInsets.all(16),
+      child: Material(
+        elevation: 1,
+        clipBehavior: Clip.antiAlias,
+        borderRadius: BorderRadius.circular(8),
+        child: Form(
+          key: form,
+          child: Column(
+            mainAxisSize: MainAxisSize.min,
+            children: <Widget>[
+              AppBar(
+                leading: Icon(Icons.verified_user),
+                elevation: 0,
+                title: Text('User Details'),
+                backgroundColor: Theme.of(context).accentColor,
+                centerTitle: true,
+                actions: <Widget>[
+                  IconButton(
+                    icon: Icon(Icons.delete),
+                    onPressed: widget.onDelete,
+                  )
+                ],
+              ),
+              Padding(
+                padding: EdgeInsets.only(left: 16, right: 16, top: 16),
+                child: TextFormField(
+                  initialValue: widget.user.fullName,
+                  onSaved: (val) => widget.user.fullName = val,
+                  validator: (val) =>
+                      val.length > 3 ? null : 'Full name is invalid',
+                  decoration: InputDecoration(
+                    labelText: 'Full Name',
+                    hintText: 'Enter your full name',
+                    icon: Icon(Icons.person),
+                    isDense: true,
+                  ),
+                ),
+              ),
+              Padding(
+                padding: EdgeInsets.only(left: 16, right: 16, bottom: 24),
+                child: TextFormField(
+                  initialValue: widget.user.email,
+                  onSaved: (val) => widget.user.email = val,
+                  validator: (val) =>
+                      val.contains('@') ? null : 'Email is invalid',
+                  decoration: InputDecoration(
+                    labelText: 'Email Address',
+                    hintText: 'Enter your email',
+                    icon: Icon(Icons.email),
+                    isDense: true,
+                  ),
+                ),
+              ),
+              Padding(
+                padding: EdgeInsets.only(left: 16, right: 16, top: 16),
+                child: TextFormField(
+                  initialValue: widget.user.age,
+                  onSaved: (val) => widget.user.age = val,
+                  validator: (val) => val.length > 3 ? null : 'Age is invalid',
+                  decoration: InputDecoration(
+                    labelText: '4 years',
+                    hintText: 'Enter Actual Age',
+                    icon: Icon(Icons.child_care),
+                    isDense: true,
+                  ),
+                ),
+              ),
+              Padding(
+                padding: EdgeInsets.only(left: 16, right: 16, top: 16),
+                child: TextFormField(
+                  initialValue: widget.user.mentalage,
+                  onSaved: (val) => widget.user.mentalage = val,
+                  validator: (val) =>
+                      val.length > 3 ? null : 'Mental age is invalid',
+                  decoration: InputDecoration(
+                    labelText: '4 years',
+                    hintText: 'Enter Mental age',
+                    icon: Icon(Icons.score),
+                    isDense: true,
+                  ),
+                ),
+              )
+            ],
+          ),
+        ),
+      ),
+    );
+  }
+
+  ///form validator
+  bool validate() {
+    var valid = form.currentState.validate();
+    if (valid) form.currentState.save();
+    return valid;
+  }
+}