superset2/superset/assets/javascripts/explore/components/ControlPanelSection.jsx

import React from 'react';
import PropTypes from 'prop-types';
import { Panel } from 'react-bootstrap';
import InfoTooltipWithTrigger from '../../components/InfoTooltipWithTrigger';

const propTypes = {
  label: PropTypes.string,
  description: PropTypes.string,
  children: PropTypes.node.isRequired,
  startExpanded: PropTypes.bool,
};

const defaultProps = {
  label: null,
  description: null,
  startExpanded: false,
};

export default class ControlPanelSection extends React.Component {
  constructor(props) {
    super(props);
    this.state = { expanded: this.props.startExpanded };
  }
  toggleExpand() {
    this.setState({ expanded: !this.state.expanded });
  }
  renderHeader() {
    const { label, description } = this.props;
    let header;
    if (label) {
      header = (
        <div>
          <i
            className={`text-primary expander fa fa-caret-${this.state.expanded ? 'down' : 'right'}`}
            onClick={this.toggleExpand.bind(this)}
          />
          {' '}
          <span onClick={this.toggleExpand.bind(this)}>{label}</span>
          {' '}
          {description && <InfoTooltipWithTrigger label={label} tooltip={description} />}
        </div>
      );
    }
    return header;
  }

  render() {
    return (
      <Panel
        className="control-panel-section"
        collapsible
        expanded={this.state.expanded}
        header={this.renderHeader()}
      >
        {this.props.children}
      </Panel>
    );
  }
}

ControlPanelSection.propTypes = propTypes;
ControlPanelSection.defaultProps = defaultProps;