How to handle when TextField refresh the whole page? | GetX

Using GetX, how can I prevent a text field from triggering a rebuild of other widgets, such as a dropdown, when its value changes?

In that case, you can split your UI into multiple Obx widgets and make sure that each widget only depends on the state that it needs. Here’s an example of how you can split your UI into two separate Obx widgets:

class MyController extends GetxController {
  final _selectedValue = 'Option 1'.obs;
  final _textFieldValue = ''.obs;

  String get selectedValue => _selectedValue.value;
  String get textFieldValue => _textFieldValue.value;

  void onDropdownChanged(String value) {
    _selectedValue.value = value;
  }

  void onTextChanged(String value) {
    _textFieldValue.value = value;
  }
}

class MyDropdownWidget extends StatelessWidget {
  final MyController _controller = Get.put(MyController());

  @override
  Widget build(BuildContext context) {
    return Obx(
      () => DropdownButton(
        value: _controller.selectedValue,
        onChanged: (value) => _controller.onDropdownChanged(value),
        items: [
          DropdownMenuItem(value: 'Option 1', child: Text('Option 1')),
          DropdownMenuItem(value: 'Option 2', child: Text('Option 2')),
          DropdownMenuItem(value: 'Option 3', child: Text('Option 3')),
        ],
      ),
    );
  }
}

class MyTextFieldWidget extends StatelessWidget {
  final MyController _controller = Get.put(MyController());

  @override
  Widget build(BuildContext context) {
    return Obx(
      () => Column(
        children: [
          TextField(
            onChanged: (value) => _controller.onTextChanged(value),
            controller: TextEditingController(text: _controller.textFieldValue),
          ),
          SizedBox(height: 20),
          Text('Selected value: ${_controller.selectedValue}'),
        ],
      ),
    );
  }
}

class MyWidget extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('My Widget'),
      ),
      body: Column(
        children: [
          MyDropdownWidget(),
          SizedBox(height: 20),
          MyTextFieldWidget(),
        ],
      ),
    );
  }
}


In this implementation, the dropdown and the text field are in separate Obx widgets. When the value of the text field changes, only the MyTextFieldWidget widget will be rebuilt, and the MyDropdownWidget widget will not be affected. Similarly, when the dropdown value changes, only the MyDropdownWidget widget will be rebuilt, and the MyTextFieldWidget widget will not be affected. By splitting your UI into separate Obx widgets like this, you can ensure that each widget only rebuilds when it needs to and does not depend on the state of unrelated widgets.