webamp/js/components/MainWindow/EqToggleButton.js

import React from "react";
import { connect } from "react-redux";
import classnames from "classnames";

import { toggleWindow } from "../../actionCreators";

const EqToggleButton = props => (
  <div
    id="equalizer-button"
    className={classnames({ selected: props.equalizer })}
    onClick={props.handleClick}
    title="Toggle Graphical Equalizer"
  />
);

const mapStateToProps = state => ({
  equalizer: state.windows.equalizer
});

const mapDispatchToProps = {
  handleClick: () => toggleWindow("equalizer")
};

export default connect(mapStateToProps, mapDispatchToProps)(EqToggleButton);