Change widget properties by it's controller in flutter - flutter

Question

let's say I have a TextField like this
TextEditingController textController = TextEditingController()
...
TextField(
controller: textController
)
and assume I have a library which takes the controller of a TextField and prints some text inside it.
is it possible to change the properties of TextField or any other widget by it's controller ?
for example: disable the TextField
if No how can I do that inside my library, not inside a Stateful widget

Answer 1

I created this sample , you can take a look :
class SampleTextField extends StatefulWidget {
#override
SampleTextFieldState createState() {
return new SampleTextFieldState();
}
}
class SampleTextFieldState extends State<SampleTextField> {
MyCustomController customController =
MyCustomController(controller: TextEditingController());
#override
Widget build(BuildContext context) {
return Scaffold(
body: Center(
child: Column(
children: [
MyCustomTextField(
customController: customController,
),
OutlineButton(
onPressed: () {
setState(() {
customController.controller.text = "new value";
});
},
child: Text("set text"),
),
OutlineButton(
onPressed: () {
setState(() {
customController.enable = false;
});
},
child: Text("disable textfield"),
),
OutlineButton(
onPressed: () {
setState(() {
customController.enable = true;
});
},
child: Text("enable textfield"),
)
],
),
),
);
}
}
class MyCustomTextField extends StatelessWidget {
final MyCustomController customController;
const MyCustomTextField({Key key, this.customController}) : super(key: key);
#override
Widget build(BuildContext context) {
return TextFormField(
controller: customController.controller,
enabled: customController.enable,
);
}
}
class MyCustomController {
final TextEditingController controller;
bool enable;
MyCustomController({#required this.controller, this.enable = true});
}