#Simple Wizard Component

A React component to create a setup wizard that passes the state from one step to the next. Any validation should be done by the step components, the Wizard just facilitates the data flow.

####props

initialData - an object with data that should be available to the first step staticData - data that is useful to all steps and will not change steps - an array of components. Each step save - a function to call when the wizard is complete. cancel - a function to call to exit the wizard. children - any child elements passed to the wizard will be passed on to the steps to render

##Usage

const YourWizard = React.createClass({
  render: function() {
    return (
      <Wizard steps={steps} save={() => {/*...*/}} cancel={() => {/*...*/}} />
    );
  }
});

##Step Components

Step components can be whatever you want them to be. They receive startData and endData objects in their props which reflects the current state of the wizard, and return the successive state when their next function is called.

####props

startData - the current state of the wizard as a result of the previous step. endData - the data returned by the component. This is useful for re-populating the step when travelling backwards. staticData - any extra data that was passed to the wizard. previous - return to the previous step next - proceed to the next step (or call the save Wizard's finish function for the last step) children - any child elements passed to the wizard are passed on to the step to render

It doesn't make sense for the first step to have a previous button since nothing exists before the first step. The wizard will pass previous=undefined for the first step, and it is up to you to render the step to show this (either by disabling the previous button or by not rendering it at all).

While a step is considered incomplete, it is a good idea to leave the next button disabled. It is useful for a step component to keep a completed or error property about itself to determine whether or not the next button should be disabled.

The startData passed to a step is all that it knows about the results of previous steps. The value passed to the next function should always be an object. It is up to you to pass on all data that will be relevant to future steps.

##Step Example

class NameComponent extends React.Component {
  constructor(props) {
    super(props);
    const { endData = {}} = props;
    const { name = ''} = endData;
    this.state = {
      name
      completed: name !== '',
    };

    this.nextHandler = this.nextHandler.bind(this);
    this.handleName = this.handleName.bind(this);
    this.renderButtons = this.renderButtons.bind(this);
  }
 
  nextHandler(event) {
    const { completed, name } = this.state;
    if ( !completed ) {
      return;
    }
    const { startData } = this.props;
    this.props.next(Object.assign({}, startData, {name}));
  }

  handleName(event) {
    this.setState({
      name: event.target.value,
      completed: event.target.value !== ""
    });
  }

  renderButtons() {
    const { next, previous, cancel } = this.props;
    const { completed } = this.state;
    return (
      <div className='step-controls'>
        { previous !== undefined ? <button onClick={previous}>Previous</button> : null}
        <button onClick={this.nextHandler} disabled={!completed} >Next</button>
        <button onClick={cancel}>Cancel</button>
      </div>
    );
  }

  render() {
    return (
      <div className='step'>
        <p>
          <label>
            Name: <input value={this.state.name} onChange={this.handleName} />
          </label>
        </p>
        { this.renderButtons() }
      </div>
    );
  }
}

###Styling

The wizard component does not use any styles by default. The CSS below is a decent looking option (also available in the basic.css file)

.progress-bar {
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
  -webkit-flex-flow: row nowrap;
      -ms-flex-flow: row nowrap;
          flex-flow: row nowrap;
  -webkit-justify-content: space-between;
      -ms-flex-pack: justify;
          justify-content: space-between;
}

.progress-bar .marker {
  height: 10px;
  background: #F799B5;
  -webkit-flex-grow: 1;
      -ms-flex-positive: 1;
          flex-grow: 1;
  border: 1px solid #ffffff;
}

.progress-bar .marker.active {
  background: #225683;
}

.progress-bar .marker.complete {
  background: #76B85C;
}

.progress-bar .marker:first-child {
  border-radius: 5px 0 0 5px;
}

.progress-bar .marker:last-child {
  border-radius: 0 5px 5px 0;
}