moq-ui/src/radio-button-group.jsx

Simple, customizable UI components built with React

var React = require('react');
var RadioButton = require('./radio-button');

var RadioButtonGroup = React.createClass({

  propTypes: {
    name: React.PropTypes.string.isRequired,
    valueSelected: React.PropTypes.string,
    defaultSelected: React.PropTypes.string,
    onChange: React.PropTypes.func
  },

  _hasCheckAttribute: function(radioButton) {
    return radioButton.props.hasOwnProperty('checked') && 
      radioButton.props.checked; 
  },

  getInitialState: function() {
    return {
      numberCheckedRadioButtons: 0,
      selected: this.props.valueSelected || this.props.defaultSelected || ''
    };
  },

  componentWillMount: function() {
    var cnt = 0;
    var selected = this.state.selected;
    
    this.props.children.forEach(function(option) {
      if (this._hasCheckAttribute(option)) {
        cnt++;
        selected = option.props.value;
      }
    }, this);

    this.setState({
      numberCheckedRadioButtons: cnt,
      selected: selected
    });
  }, 

  componentWillReceiveProps: function(nextProps) {
    if (nextProps.hasOwnProperty('valueSelected')) {
      this.setState({selected: nextProps.valueSelected});
    }
  },

  getClasses: function() {
    var classString = 'moq-radio-button-group';
    if (this.props.className && this.props.className.length) {
      classString += ' ' + this.props.className;
    }
    return classString;
  },

  render: function() {
    var options = this.props.children.map(function(option) {

      if (option.type.displayName == 'RadioButton') {
      
        var {
          name,
          value, 
          labelText,
          ...other
        } = option.props;

        return <RadioButton
          {...other}
          ref={option.props.value}
          name={this.props.name}
          key={option.props.value}
          value={option.props.value}
          labelText={option.props.labelText}
          onChange={this._onChange}
          checked={option.props.value == this.state.selected} />

      } else {

        return option;

      }    

    }, this);

    return (
      <div className={this.getClasses()} onMouseDownCapture={this._onMouseDown}>
        {options}
      </div>
    );
  },

  _onMouseDown: function(e) {
    if (this.state.numberCheckedRadioButtons == 0) {
      if (this.props.onMouseDown) this.props.onMouseDown(e);
    } else {
      e.stopPropagation();
      var message = "Cannot select a different radio button while another radio button " +
                    "has the 'checked' property set to true.";
      console.error(message);
    } 
  },

  _updateRadioButtons: function(newValue) {
    if (this.state.numberCheckedRadioButtons == 0) {
      this.setState({selected: newValue});
    }
  },

  _onChange: function(e, newValue) {
    this._updateRadioButtons(newValue);

    // Successful update
    if (this.state.numberCheckedRadioButtons == 0) {
      if (this.props.onChange) this.props.onChange(e, newValue);
    }
  },

  getSelectedValue: function() {
    return this.state.selected;
  },

  setSelectedValue: function(newSelectionValue) {
    this._updateRadioButtons(newSelectionValue);  
  },

  clearValue: function() {
    this.setSelectedValue('');  
  }

});

module.exports = RadioButtonGroup;