material-ui/lib/time-picker/clock-pointer.js

Material Design UI components built with React

'use strict';

var React = require('react');
var StylePropable = require('../mixins/style-propable');

var ClockPointer = React.createClass({
  displayName: 'ClockPointer',

  mixins: [StylePropable],

  contextTypes: {
    muiTheme: React.PropTypes.object
  },

  propTypes: {
    value: React.PropTypes.number,
    type: React.PropTypes.oneOf(['hour', 'minute'])
  },

  getInitialState: function getInitialState() {
    return {
      inner: this.isInner(this.props.value)
    };
  },

  getDefaultProps: function getDefaultProps() {
    return {
      value: null,
      type: 'minute',
      hasSelected: false
    };
  },

  componentWillReceiveProps: function componentWillReceiveProps(nextProps) {
    this.setState({
      inner: this.isInner(nextProps.value)
    });
  },

  isInner: function isInner(value) {
    if (this.props.type !== 'hour') {
      return false;
    }
    return value < 1 || value > 12;
  },

  getAngle: function getAngle() {
    if (this.props.type === 'hour') {
      return this.calcAngle(this.props.value, 12);
    }

    return this.calcAngle(this.props.value, 60);
  },

  calcAngle: function calcAngle(value, base) {
    value %= base;
    var angle = 360 / base * value;
    return angle;
  },

  getTheme: function getTheme() {
    return this.context.muiTheme.component.timePicker;
  },

  render: function render() {
    if (this.props.value === null) {
      return React.createElement('span', null);
    }

    var angle = this.getAngle();

    var styles = {
      root: {
        height: '30%',
        background: this.getTheme().accentColor,
        width: 2,
        left: 'calc(50% - 1px)',
        position: 'absolute',
        bottom: '50%',
        transformOrigin: 'bottom',
        pointerEvents: 'none',
        transform: 'rotateZ(' + angle + 'deg)'
      },
      mark: {
        background: this.getTheme().selectTextColor,
        border: '4px solid ' + this.getTheme().accentColor,
        width: 7,
        height: 7,
        position: 'absolute',
        top: -5,
        left: -6,
        borderRadius: '100%'
      }
    };

    if (!this.state.inner) {
      styles.root.height = '40%';
    }

    if (this.props.hasSelected) {
      styles.mark.display = 'none';
    }

    return React.createElement(
      'div',
      { style: this.mergeAndPrefix(styles.root) },
      React.createElement('div', { style: styles.mark })
    );
  }
});

module.exports = ClockPointer;