react-miller-columns

React-Millercolumns

Lightweight, responsive and configurable React version of miller columns

React-Millercolumns helps you create tree viewers!

• The React-Millercolumns only cares how many Column components passed in via props.children and updates UI. It doesn't care what contents we render.
• You have a control over how to use the component.

Basic example

import { MillerColumns, Column } from './MillerColumns';

const Row = (props) => {
  const style = {
    transition: 'background 200ms',
    background: props.peekColumn && !props.transitioning
      ? '#bae6f9'
      : '',
    height: '500px',
    border: '1px solid salmon',
    borderRadius: '5px',
    display: 'flex',
    fontSize: '14px',
    flexDirection: 'column',
    justifyContent: 'center',
  }
  return (
    <div
      onClick={props.peekColumn
        ? props.onRemove
        : props.onAdd}
      style={style}>
      Column {props.currentIndex}
    </div>
  );
}

class App extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      count: 4,
    }
    this.inc = this.inc.bind(this);
    this.dec = this.dec.bind(this);
  }

  inc() {
    this.setState({
      count: ++this.state.count,
    })
  }

  dec() {
    this.setState({
      count: --this.state.count,
    })
  }

  getColumns() {
    let arr = [];
    for (let i = 0; i < this.state.count; i++) {
      arr.push(<Column key={i}>
        <Row
          onAdd={this.inc}
          onRemove={this.dec}
          currentIndex={i} />
      </Column>)
    }
    return arr;
  }

  render() {
    return (
      <div style={{marginTop: '50px'}} className="App">
          <MillerColumns
            maxColumn={5}
            minColumnWidth={150}
            maxColumnWidth={200}
            columnMagin={30}
            peekWidth={30}
          >
            {
              this.getColumns()
            }
          </MillerColumns>
      </div>
    );
  }
}

Advanced example

The full source code is availble at /src/sample

import { MillerColumns, Column } from './MillerColumns';
import sampleTree from './sample/sampleTree';
import Model from './sample/model';
import Row from './sample/Row';

class App extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      tree: new Model(sampleTree)
    }
    this.onRowClick = this.onRowClick.bind(this);
  }

  onRowClick(label) {
    this.state.tree.FindAndSetSelected(label);
    this.setState({
      tree: this.state.tree,
    })
  }

  getColumn(tree, index) {
    return (
      <Column key={index}>
        <Row onRowClick={this.onRowClick} tree={tree} />
      </Column>
    )
  }

  getColumns(tree, columns = [], localIndex = 0) {
    let index = localIndex || 0;
    columns.push(this.getColumn(tree, index));
    if (!tree.selectedChild) return columns;
    return this.getColumns(tree.NextNode, columns, ++localIndex);
  }

  render() {
    return (
      <div style={{ marginTop: '50px' }} className="App">
        <MillerColumns
          maxColumn={4}
          minColumnWidth={150}
          columnMagin={35}
          peekWidth={35}
        >
          {
            this.getColumns(this.state.tree)
          }
        </MillerColumns>
      </div>
    );
  }
}

Api

MillerColumns

Props	Type	Description	Required
maxColumn	Number	Maximum number of visible columns	Yes
minColumnWidth	Number	Minimum width of each column	Yes
columnMagin	Number	Margin between columns	Yes
peekWidth	Number	Width of the Peek column	Yes
children	Array	Array of Column component	Yes
animationSpeed	Number	Animation speed of moving columns	No

Column

Props	Type	Description	Required
style	Object	style object Column	No

Each of your content component needs to be wrapped with Column component so that it can access the following via props

Name	Type	Description
peekColumn	Boolean	Indicates if the column is the peek column
transitioning	Boolean	Indicates if the millercolumn is being resized or a number of columns being updated
column	Object	Instance of ColumnMover class, details below

column object passed via props is mostly internal use. however some of properties can be useful

Name	Type	Description
totalWidth	Number	Current width of Millercolumns
maxColumnWidth	Number	Current width of column
marginRight	Number	Current margin of column
shouldShowPeek	Boolean	Indicates if Millercolumns should show the peek column
peekIndex	Number	Current index of peek column
visibleColumns	Number	Current number of visible columns