I'm trying to implement Sub-menu (nested menu).
It's worth to mention that I'm using hydra component and don't have previous experience with redux (started learning it a few days ago because of this specific problem).
I've followed the example provided on material-ui for nested list https://material-ui.com/demos/lists/#nested-list. And tutorial from https://marmelab.com/react-admin/Theming.html#using-a-custom-menu for custom menu implementation.
So I have a few questions.
1) Can I have stateful component (MyMenu) just for handling toggling of menu items?
An example is not related to react-admin but its just example what I mean.
import React, { Component } from "react";
import { connect } from "react-redux";
import { addArticle } from "../actions/index";
const mapDispatchToProps = dispatch => {
  return {
    addArticle: article => dispatch(addArticle(article))
  };
};
class ConnectedForm extends Component {
  constructor() {
    super();
    this.state = {
      title: ""
    };
    this.handleChange = this.handleChange.bind(this);
    this.handleSubmit = this.handleSubmit.bind(this);
  }
  handleChange(event) {
    this.setState({ [event.target.id]: event.target.value });
  }
  handleSubmit(event) {
    event.preventDefault();
    const { title } = this.state;
    const id = uuidv1();
    this.props.addArticle({ title, id });
    this.setState({ title: "" });
  }
  render() {
    const { title } = this.state;
    return (
      <form onSubmit={this.handleSubmit}>
        <div className="form-group">
          <label htmlFor="title">Title</label>
          <input
            type="text"
            className="form-control"
            id="title"
            value={title}
            onChange={this.handleChange}
          />
        </div>
        <button type="submit" className="btn btn-success btn-lg">
          SAVE
        </button>
      </form>
    );
  }
}
const Form = connect(null, mapDispatchToProps)(ConnectedForm);
export default Form;
2) If not, can I achieve that by declaring a new state in store, for example, open: false, and then using the custom reducer to handle that.
3(bonus). If it's not a problem I would appreciate if someone can put me in the right direction which things to start learning first so I can less painfully manage to solve issues related to this amazing framework :)
