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Viewing file:     Slider.js (27.58 KB)      -rw-r--r--

import _objectWithoutPropertiesLoose from "@babel/runtime/helpers/esm/objectWithoutPropertiesLoose";
import _extends from "@babel/runtime/helpers/esm/extends";
import * as React from 'react';
import PropTypes from 'prop-types';
import clsx from 'clsx';
import { chainPropTypes } from '@material-ui/utils';
import withStyles from '../styles/withStyles';
import useTheme from '../styles/useTheme';
import { alpha, lighten, darken } from '../styles/colorManipulator';
import useIsFocusVisible from '../utils/useIsFocusVisible';
import ownerDocument from '../utils/ownerDocument';
import useEventCallback from '../utils/useEventCallback';
import useForkRef from '../utils/useForkRef';
import capitalize from '../utils/capitalize';
import useControlled from '../utils/useControlled';
import ValueLabel from './ValueLabel';

function asc(a, b) {
  return a - b;
}

function clamp(value, min, max) {
  return Math.min(Math.max(min, value), max);
}

function findClosest(values, currentValue) {
  const {
    index: closestIndex
  } = values.reduce((acc, value, index) => {
    const distance = Math.abs(currentValue - value);

    if (acc === null || distance < acc.distance || distance === acc.distance) {
      return {
        distance,
        index
      };
    }

    return acc;
  }, null);
  return closestIndex;
}

function trackFinger(event, touchId) {
  if (touchId.current !== undefined && event.changedTouches) {
    for (let i = 0; i < event.changedTouches.length; i += 1) {
      const touch = event.changedTouches[i];

      if (touch.identifier === touchId.current) {
        return {
          x: touch.clientX,
          y: touch.clientY
        };
      }
    }

    return false;
  }

  return {
    x: event.clientX,
    y: event.clientY
  };
}

function valueToPercent(value, min, max) {
  return (value - min) * 100 / (max - min);
}

function percentToValue(percent, min, max) {
  return (max - min) * percent + min;
}

function getDecimalPrecision(num) {
  // This handles the case when num is very small (0.00000001), js will turn this into 1e-8.
  // When num is bigger than 1 or less than -1 it won't get converted to this notation so it's fine.
  if (Math.abs(num) < 1) {
    const parts = num.toExponential().split('e-');
    const matissaDecimalPart = parts[0].split('.')[1];
    return (matissaDecimalPart ? matissaDecimalPart.length : 0) + parseInt(parts[1], 10);
  }

  const decimalPart = num.toString().split('.')[1];
  return decimalPart ? decimalPart.length : 0;
}

function roundValueToStep(value, step, min) {
  const nearest = Math.round((value - min) / step) * step + min;
  return Number(nearest.toFixed(getDecimalPrecision(step)));
}

function setValueIndex({
  values,
  source,
  newValue,
  index
}) {
  // Performance shortcut
  if (values[index] === newValue) {
    return source;
  }

  const output = values.slice();
  output[index] = newValue;
  return output;
}

function focusThumb({
  sliderRef,
  activeIndex,
  setActive
}) {
  if (!sliderRef.current.contains(document.activeElement) || Number(document.activeElement.getAttribute('data-index')) !== activeIndex) {
    sliderRef.current.querySelector(`[role="slider"][data-index="${activeIndex}"]`).focus();
  }

  if (setActive) {
    setActive(activeIndex);
  }
}

const axisProps = {
  horizontal: {
    offset: percent => ({
      left: `${percent}%`
    }),
    leap: percent => ({
      width: `${percent}%`
    })
  },
  'horizontal-reverse': {
    offset: percent => ({
      right: `${percent}%`
    }),
    leap: percent => ({
      width: `${percent}%`
    })
  },
  vertical: {
    offset: percent => ({
      bottom: `${percent}%`
    }),
    leap: percent => ({
      height: `${percent}%`
    })
  }
};

const Identity = x => x;

export const styles = theme => ({
  /* Styles applied to the root element. */
  root: {
    height: 2,
    width: '100%',
    boxSizing: 'content-box',
    padding: '13px 0',
    display: 'inline-block',
    position: 'relative',
    cursor: 'pointer',
    touchAction: 'none',
    color: theme.palette.primary.main,
    WebkitTapHighlightColor: 'transparent',
    '&$disabled': {
      pointerEvents: 'none',
      cursor: 'default',
      color: theme.palette.grey[400]
    },
    '&$vertical': {
      width: 2,
      height: '100%',
      padding: '0 13px'
    },
    // The primary input mechanism of the device includes a pointing device of limited accuracy.
    '@media (pointer: coarse)': {
      // Reach 42px touch target, about ~8mm on screen.
      padding: '20px 0',
      '&$vertical': {
        padding: '0 20px'
      }
    },
    '@media print': {
      colorAdjust: 'exact'
    }
  },

  /* Styles applied to the root element if `color="primary"`. */
  colorPrimary: {// TODO v5: move the style here
  },

  /* Styles applied to the root element if `color="secondary"`. */
  colorSecondary: {
    color: theme.palette.secondary.main
  },

  /* Styles applied to the root element if `marks` is provided with at least one label. */
  marked: {
    marginBottom: 20,
    '&$vertical': {
      marginBottom: 'auto',
      marginRight: 20
    }
  },

  /* Pseudo-class applied to the root element if `orientation="vertical"`. */
  vertical: {},

  /* Pseudo-class applied to the root and thumb element if `disabled={true}`. */
  disabled: {},

  /* Styles applied to the rail element. */
  rail: {
    display: 'block',
    position: 'absolute',
    width: '100%',
    height: 2,
    borderRadius: 1,
    backgroundColor: 'currentColor',
    opacity: 0.38,
    '$vertical &': {
      height: '100%',
      width: 2
    }
  },

  /* Styles applied to the track element. */
  track: {
    display: 'block',
    position: 'absolute',
    height: 2,
    borderRadius: 1,
    backgroundColor: 'currentColor',
    '$vertical &': {
      width: 2
    }
  },

  /* Styles applied to the track element if `track={false}`. */
  trackFalse: {
    '& $track': {
      display: 'none'
    }
  },

  /* Styles applied to the track element if `track="inverted"`. */
  trackInverted: {
    '& $track': {
      backgroundColor: // Same logic as the LinearProgress track color
      theme.palette.type === 'light' ? lighten(theme.palette.primary.main, 0.62) : darken(theme.palette.primary.main, 0.5)
    },
    '& $rail': {
      opacity: 1
    }
  },

  /* Styles applied to the thumb element. */
  thumb: {
    position: 'absolute',
    width: 12,
    height: 12,
    marginLeft: -6,
    marginTop: -5,
    boxSizing: 'border-box',
    borderRadius: '50%',
    outline: 0,
    backgroundColor: 'currentColor',
    display: 'flex',
    alignItems: 'center',
    justifyContent: 'center',
    transition: theme.transitions.create(['box-shadow'], {
      duration: theme.transitions.duration.shortest
    }),
    '&::after': {
      position: 'absolute',
      content: '""',
      borderRadius: '50%',
      // reach 42px hit target (2 * 15 + thumb diameter)
      left: -15,
      top: -15,
      right: -15,
      bottom: -15
    },
    '&$focusVisible,&:hover': {
      boxShadow: `0px 0px 0px 8px ${alpha(theme.palette.primary.main, 0.16)}`,
      '@media (hover: none)': {
        boxShadow: 'none'
      }
    },
    '&$active': {
      boxShadow: `0px 0px 0px 14px ${alpha(theme.palette.primary.main, 0.16)}`
    },
    '&$disabled': {
      width: 8,
      height: 8,
      marginLeft: -4,
      marginTop: -3,
      '&:hover': {
        boxShadow: 'none'
      }
    },
    '$vertical &': {
      marginLeft: -5,
      marginBottom: -6
    },
    '$vertical &$disabled': {
      marginLeft: -3,
      marginBottom: -4
    }
  },

  /* Styles applied to the thumb element if `color="primary"`. */
  thumbColorPrimary: {// TODO v5: move the style here
  },

  /* Styles applied to the thumb element if `color="secondary"`. */
  thumbColorSecondary: {
    '&$focusVisible,&:hover': {
      boxShadow: `0px 0px 0px 8px ${alpha(theme.palette.secondary.main, 0.16)}`
    },
    '&$active': {
      boxShadow: `0px 0px 0px 14px ${alpha(theme.palette.secondary.main, 0.16)}`
    }
  },

  /* Pseudo-class applied to the thumb element if it's active. */
  active: {},

  /* Pseudo-class applied to the thumb element if keyboard focused. */
  focusVisible: {},

  /* Styles applied to the thumb label element. */
  valueLabel: {
    // IE 11 centering bug, to remove from the customization demos once no longer supported
    left: 'calc(-50% - 4px)'
  },

  /* Styles applied to the mark element. */
  mark: {
    position: 'absolute',
    width: 2,
    height: 2,
    borderRadius: 1,
    backgroundColor: 'currentColor'
  },

  /* Styles applied to the mark element if active (depending on the value). */
  markActive: {
    backgroundColor: theme.palette.background.paper,
    opacity: 0.8
  },

  /* Styles applied to the mark label element. */
  markLabel: _extends({}, theme.typography.body2, {
    color: theme.palette.text.secondary,
    position: 'absolute',
    top: 26,
    transform: 'translateX(-50%)',
    whiteSpace: 'nowrap',
    '$vertical &': {
      top: 'auto',
      left: 26,
      transform: 'translateY(50%)'
    },
    '@media (pointer: coarse)': {
      top: 40,
      '$vertical &': {
        left: 31
      }
    }
  }),

  /* Styles applied to the mark label element if active (depending on the value). */
  markLabelActive: {
    color: theme.palette.text.primary
  }
});
const Slider = /*#__PURE__*/React.forwardRef(function Slider(props, ref) {
  const {
    'aria-label': ariaLabel,
    'aria-labelledby': ariaLabelledby,
    'aria-valuetext': ariaValuetext,
    classes,
    className,
    color = 'primary',
    component: Component = 'span',
    defaultValue,
    disabled = false,
    getAriaLabel,
    getAriaValueText,
    marks: marksProp = false,
    max = 100,
    min = 0,
    name,
    onChange,
    onChangeCommitted,
    onMouseDown,
    orientation = 'horizontal',
    scale = Identity,
    step = 1,
    ThumbComponent = 'span',
    track = 'normal',
    value: valueProp,
    ValueLabelComponent = ValueLabel,
    valueLabelDisplay = 'off',
    valueLabelFormat = Identity
  } = props,
        other = _objectWithoutPropertiesLoose(props, ["aria-label", "aria-labelledby", "aria-valuetext", "classes", "className", "color", "component", "defaultValue", "disabled", "getAriaLabel", "getAriaValueText", "marks", "max", "min", "name", "onChange", "onChangeCommitted", "onMouseDown", "orientation", "scale", "step", "ThumbComponent", "track", "value", "ValueLabelComponent", "valueLabelDisplay", "valueLabelFormat"]);

  const theme = useTheme();
  const touchId = React.useRef(); // We can't use the :active browser pseudo-classes.
  // - The active state isn't triggered when clicking on the rail.
  // - The active state isn't transfered when inversing a range slider.

  const [active, setActive] = React.useState(-1);
  const [open, setOpen] = React.useState(-1);
  const [valueDerived, setValueState] = useControlled({
    controlled: valueProp,
    default: defaultValue,
    name: 'Slider'
  });
  const range = Array.isArray(valueDerived);
  let values = range ? valueDerived.slice().sort(asc) : [valueDerived];
  values = values.map(value => clamp(value, min, max));
  const marks = marksProp === true && step !== null ? [...Array(Math.floor((max - min) / step) + 1)].map((_, index) => ({
    value: min + step * index
  })) : marksProp || [];
  const {
    isFocusVisible,
    onBlurVisible,
    ref: focusVisibleRef
  } = useIsFocusVisible();
  const [focusVisible, setFocusVisible] = React.useState(-1);
  const sliderRef = React.useRef();
  const handleFocusRef = useForkRef(focusVisibleRef, sliderRef);
  const handleRef = useForkRef(ref, handleFocusRef);
  const handleFocus = useEventCallback(event => {
    const index = Number(event.currentTarget.getAttribute('data-index'));

    if (isFocusVisible(event)) {
      setFocusVisible(index);
    }

    setOpen(index);
  });
  const handleBlur = useEventCallback(() => {
    if (focusVisible !== -1) {
      setFocusVisible(-1);
      onBlurVisible();
    }

    setOpen(-1);
  });
  const handleMouseOver = useEventCallback(event => {
    const index = Number(event.currentTarget.getAttribute('data-index'));
    setOpen(index);
  });
  const handleMouseLeave = useEventCallback(() => {
    setOpen(-1);
  });
  const isRtl = theme.direction === 'rtl';
  const handleKeyDown = useEventCallback(event => {
    const index = Number(event.currentTarget.getAttribute('data-index'));
    const value = values[index];
    const tenPercents = (max - min) / 10;
    const marksValues = marks.map(mark => mark.value);
    const marksIndex = marksValues.indexOf(value);
    let newValue;
    const increaseKey = isRtl ? 'ArrowLeft' : 'ArrowRight';
    const decreaseKey = isRtl ? 'ArrowRight' : 'ArrowLeft';

    switch (event.key) {
      case 'Home':
        newValue = min;
        break;

      case 'End':
        newValue = max;
        break;

      case 'PageUp':
        if (step) {
          newValue = value + tenPercents;
        }

        break;

      case 'PageDown':
        if (step) {
          newValue = value - tenPercents;
        }

        break;

      case increaseKey:
      case 'ArrowUp':
        if (step) {
          newValue = value + step;
        } else {
          newValue = marksValues[marksIndex + 1] || marksValues[marksValues.length - 1];
        }

        break;

      case decreaseKey:
      case 'ArrowDown':
        if (step) {
          newValue = value - step;
        } else {
          newValue = marksValues[marksIndex - 1] || marksValues[0];
        }

        break;

      default:
        return;
    } // Prevent scroll of the page


    event.preventDefault();

    if (step) {
      newValue = roundValueToStep(newValue, step, min);
    }

    newValue = clamp(newValue, min, max);

    if (range) {
      const previousValue = newValue;
      newValue = setValueIndex({
        values,
        source: valueDerived,
        newValue,
        index
      }).sort(asc);
      focusThumb({
        sliderRef,
        activeIndex: newValue.indexOf(previousValue)
      });
    }

    setValueState(newValue);
    setFocusVisible(index);

    if (onChange) {
      onChange(event, newValue);
    }

    if (onChangeCommitted) {
      onChangeCommitted(event, newValue);
    }
  });
  const previousIndex = React.useRef();
  let axis = orientation;

  if (isRtl && orientation !== "vertical") {
    axis += '-reverse';
  }

  const getFingerNewValue = ({
    finger,
    move = false,
    values: values2,
    source
  }) => {
    const {
      current: slider
    } = sliderRef;
    const {
      width,
      height,
      bottom,
      left
    } = slider.getBoundingClientRect();
    let percent;

    if (axis.indexOf('vertical') === 0) {
      percent = (bottom - finger.y) / height;
    } else {
      percent = (finger.x - left) / width;
    }

    if (axis.indexOf('-reverse') !== -1) {
      percent = 1 - percent;
    }

    let newValue;
    newValue = percentToValue(percent, min, max);

    if (step) {
      newValue = roundValueToStep(newValue, step, min);
    } else {
      const marksValues = marks.map(mark => mark.value);
      const closestIndex = findClosest(marksValues, newValue);
      newValue = marksValues[closestIndex];
    }

    newValue = clamp(newValue, min, max);
    let activeIndex = 0;

    if (range) {
      if (!move) {
        activeIndex = findClosest(values2, newValue);
      } else {
        activeIndex = previousIndex.current;
      }

      const previousValue = newValue;
      newValue = setValueIndex({
        values: values2,
        source,
        newValue,
        index: activeIndex
      }).sort(asc);
      activeIndex = newValue.indexOf(previousValue);
      previousIndex.current = activeIndex;
    }

    return {
      newValue,
      activeIndex
    };
  };

  const handleTouchMove = useEventCallback(event => {
    const finger = trackFinger(event, touchId);

    if (!finger) {
      return;
    }

    const {
      newValue,
      activeIndex
    } = getFingerNewValue({
      finger,
      move: true,
      values,
      source: valueDerived
    });
    focusThumb({
      sliderRef,
      activeIndex,
      setActive
    });
    setValueState(newValue);

    if (onChange) {
      onChange(event, newValue);
    }
  });
  const handleTouchEnd = useEventCallback(event => {
    const finger = trackFinger(event, touchId);

    if (!finger) {
      return;
    }

    const {
      newValue
    } = getFingerNewValue({
      finger,
      values,
      source: valueDerived
    });
    setActive(-1);

    if (event.type === 'touchend') {
      setOpen(-1);
    }

    if (onChangeCommitted) {
      onChangeCommitted(event, newValue);
    }

    touchId.current = undefined;
    const doc = ownerDocument(sliderRef.current);
    doc.removeEventListener('mousemove', handleTouchMove);
    doc.removeEventListener('mouseup', handleTouchEnd);
    doc.removeEventListener('touchmove', handleTouchMove);
    doc.removeEventListener('touchend', handleTouchEnd);
  });
  const handleTouchStart = useEventCallback(event => {
    // Workaround as Safari has partial support for touchAction: 'none'.
    event.preventDefault();
    const touch = event.changedTouches[0];

    if (touch != null) {
      // A number that uniquely identifies the current finger in the touch session.
      touchId.current = touch.identifier;
    }

    const finger = trackFinger(event, touchId);
    const {
      newValue,
      activeIndex
    } = getFingerNewValue({
      finger,
      values,
      source: valueDerived
    });
    focusThumb({
      sliderRef,
      activeIndex,
      setActive
    });
    setValueState(newValue);

    if (onChange) {
      onChange(event, newValue);
    }

    const doc = ownerDocument(sliderRef.current);
    doc.addEventListener('touchmove', handleTouchMove);
    doc.addEventListener('touchend', handleTouchEnd);
  });
  React.useEffect(() => {
    const {
      current: slider
    } = sliderRef;
    slider.addEventListener('touchstart', handleTouchStart);
    const doc = ownerDocument(slider);
    return () => {
      slider.removeEventListener('touchstart', handleTouchStart);
      doc.removeEventListener('mousemove', handleTouchMove);
      doc.removeEventListener('mouseup', handleTouchEnd);
      doc.removeEventListener('touchmove', handleTouchMove);
      doc.removeEventListener('touchend', handleTouchEnd);
    };
  }, [handleTouchEnd, handleTouchMove, handleTouchStart]);
  const handleMouseDown = useEventCallback(event => {
    if (onMouseDown) {
      onMouseDown(event);
    }

    event.preventDefault();
    const finger = trackFinger(event, touchId);
    const {
      newValue,
      activeIndex
    } = getFingerNewValue({
      finger,
      values,
      source: valueDerived
    });
    focusThumb({
      sliderRef,
      activeIndex,
      setActive
    });
    setValueState(newValue);

    if (onChange) {
      onChange(event, newValue);
    }

    const doc = ownerDocument(sliderRef.current);
    doc.addEventListener('mousemove', handleTouchMove);
    doc.addEventListener('mouseup', handleTouchEnd);
  });
  const trackOffset = valueToPercent(range ? values[0] : min, min, max);
  const trackLeap = valueToPercent(values[values.length - 1], min, max) - trackOffset;

  const trackStyle = _extends({}, axisProps[axis].offset(trackOffset), axisProps[axis].leap(trackLeap));

  return /*#__PURE__*/React.createElement(Component, _extends({
    ref: handleRef,
    className: clsx(classes.root, classes[`color${capitalize(color)}`], className, disabled && classes.disabled, marks.length > 0 && marks.some(mark => mark.label) && classes.marked, track === false && classes.trackFalse, orientation === 'vertical' && classes.vertical, track === 'inverted' && classes.trackInverted),
    onMouseDown: handleMouseDown
  }, other), /*#__PURE__*/React.createElement("span", {
    className: classes.rail
  }), /*#__PURE__*/React.createElement("span", {
    className: classes.track,
    style: trackStyle
  }), /*#__PURE__*/React.createElement("input", {
    value: values.join(','),
    name: name,
    type: "hidden"
  }), marks.map((mark, index) => {
    const percent = valueToPercent(mark.value, min, max);
    const style = axisProps[axis].offset(percent);
    let markActive;

    if (track === false) {
      markActive = values.indexOf(mark.value) !== -1;
    } else {
      markActive = track === 'normal' && (range ? mark.value >= values[0] && mark.value <= values[values.length - 1] : mark.value <= values[0]) || track === 'inverted' && (range ? mark.value <= values[0] || mark.value >= values[values.length - 1] : mark.value >= values[0]);
    }

    return /*#__PURE__*/React.createElement(React.Fragment, {
      key: mark.value
    }, /*#__PURE__*/React.createElement("span", {
      style: style,
      "data-index": index,
      className: clsx(classes.mark, markActive && classes.markActive)
    }), mark.label != null ? /*#__PURE__*/React.createElement("span", {
      "aria-hidden": true,
      "data-index": index,
      style: style,
      className: clsx(classes.markLabel, markActive && classes.markLabelActive)
    }, mark.label) : null);
  }), values.map((value, index) => {
    const percent = valueToPercent(value, min, max);
    const style = axisProps[axis].offset(percent);
    return /*#__PURE__*/React.createElement(ValueLabelComponent, {
      key: index,
      valueLabelFormat: valueLabelFormat,
      valueLabelDisplay: valueLabelDisplay,
      className: classes.valueLabel,
      value: typeof valueLabelFormat === 'function' ? valueLabelFormat(scale(value), index) : valueLabelFormat,
      index: index,
      open: open === index || active === index || valueLabelDisplay === 'on',
      disabled: disabled
    }, /*#__PURE__*/React.createElement(ThumbComponent, {
      className: clsx(classes.thumb, classes[`thumbColor${capitalize(color)}`], active === index && classes.active, disabled && classes.disabled, focusVisible === index && classes.focusVisible),
      tabIndex: disabled ? null : 0,
      role: "slider",
      style: style,
      "data-index": index,
      "aria-label": getAriaLabel ? getAriaLabel(index) : ariaLabel,
      "aria-labelledby": ariaLabelledby,
      "aria-orientation": orientation,
      "aria-valuemax": scale(max),
      "aria-valuemin": scale(min),
      "aria-valuenow": scale(value),
      "aria-valuetext": getAriaValueText ? getAriaValueText(scale(value), index) : ariaValuetext,
      onKeyDown: handleKeyDown,
      onFocus: handleFocus,
      onBlur: handleBlur,
      onMouseOver: handleMouseOver,
      onMouseLeave: handleMouseLeave
    }));
  }));
});
process.env.NODE_ENV !== "production" ? Slider.propTypes = {
  /**
   * The label of the slider.
   */
  'aria-label': chainPropTypes(PropTypes.string, props => {
    const range = Array.isArray(props.value || props.defaultValue);

    if (range && props['aria-label'] != null) {
      return new Error('Material-UI: You need to use the `getAriaLabel` prop instead of `aria-label` when using a range slider.');
    }

    return null;
  }),

  /**
   * The id of the element containing a label for the slider.
   */
  'aria-labelledby': PropTypes.string,

  /**
   * A string value that provides a user-friendly name for the current value of the slider.
   */
  'aria-valuetext': chainPropTypes(PropTypes.string, props => {
    const range = Array.isArray(props.value || props.defaultValue);

    if (range && props['aria-valuetext'] != null) {
      return new Error('Material-UI: You need to use the `getAriaValueText` prop instead of `aria-valuetext` when using a range slider.');
    }

    return null;
  }),

  /**
   * Override or extend the styles applied to the component.
   * See [CSS API](#css) below for more details.
   */
  classes: PropTypes.object.isRequired,

  /**
   * @ignore
   */
  className: PropTypes.string,

  /**
   * The color of the component. It supports those theme colors that make sense for this component.
   */
  color: PropTypes.oneOf(['primary', 'secondary']),

  /**
   * The component used for the root node.
   * Either a string to use a HTML element or a component.
   */
  component: PropTypes
  /* @typescript-to-proptypes-ignore */
  .elementType,

  /**
   * The default element value. Use when the component is not controlled.
   */
  defaultValue: PropTypes.oneOfType([PropTypes.number, PropTypes.arrayOf(PropTypes.number)]),

  /**
   * If `true`, the slider will be disabled.
   */
  disabled: PropTypes.bool,

  /**
   * Accepts a function which returns a string value that provides a user-friendly name for the thumb labels of the slider.
   *
   * @param {number} index The thumb label's index to format.
   * @returns {string}
   */
  getAriaLabel: PropTypes.func,

  /**
   * Accepts a function which returns a string value that provides a user-friendly name for the current value of the slider.
   *
   * @param {number} value The thumb label's value to format.
   * @param {number} index The thumb label's index to format.
   * @returns {string}
   */
  getAriaValueText: PropTypes.func,

  /**
   * Marks indicate predetermined values to which the user can move the slider.
   * If `true` the marks will be spaced according the value of the `step` prop.
   * If an array, it should contain objects with `value` and an optional `label` keys.
   */
  marks: PropTypes.oneOfType([PropTypes.bool, PropTypes.array]),

  /**
   * The maximum allowed value of the slider.
   * Should not be equal to min.
   */
  max: PropTypes.number,

  /**
   * The minimum allowed value of the slider.
   * Should not be equal to max.
   */
  min: PropTypes.number,

  /**
   * Name attribute of the hidden `input` element.
   */
  name: PropTypes.string,

  /**
   * Callback function that is fired when the slider's value changed.
   *
   * @param {object} event The event source of the callback.
   * @param {number | number[]} value The new value.
   */
  onChange: PropTypes.func,

  /**
   * Callback function that is fired when the `mouseup` is triggered.
   *
   * @param {object} event The event source of the callback.
   * @param {number | number[]} value The new value.
   */
  onChangeCommitted: PropTypes.func,

  /**
   * @ignore
   */
  onMouseDown: PropTypes.func,

  /**
   * The slider orientation.
   */
  orientation: PropTypes.oneOf(['horizontal', 'vertical']),

  /**
   * A transformation function, to change the scale of the slider.
   */
  scale: PropTypes.func,

  /**
   * The granularity with which the slider can step through values. (A "discrete" slider.)
   * The `min` prop serves as the origin for the valid values.
   * We recommend (max - min) to be evenly divisible by the step.
   *
   * When step is `null`, the thumb can only be slid onto marks provided with the `marks` prop.
   */
  step: PropTypes.number,

  /**
   * The component used to display the value label.
   */
  ThumbComponent: PropTypes.elementType,

  /**
   * The track presentation:
   *
   * - `normal` the track will render a bar representing the slider value.
   * - `inverted` the track will render a bar representing the remaining slider value.
   * - `false` the track will render without a bar.
   */
  track: PropTypes.oneOf(['normal', false, 'inverted']),

  /**
   * The value of the slider.
   * For ranged sliders, provide an array with two values.
   */
  value: PropTypes.oneOfType([PropTypes.number, PropTypes.arrayOf(PropTypes.number)]),

  /**
   * The value label component.
   */
  ValueLabelComponent: PropTypes.elementType,

  /**
   * Controls when the value label is displayed:
   *
   * - `auto` the value label will display when the thumb is hovered or focused.
   * - `on` will display persistently.
   * - `off` will never display.
   */
  valueLabelDisplay: PropTypes.oneOf(['on', 'auto', 'off']),

  /**
   * The format function the value label's value.
   *
   * When a function is provided, it should have the following signature:
   *
   * - {number} value The value label's value to format
   * - {number} index The value label's index to format
   */
  valueLabelFormat: PropTypes.oneOfType([PropTypes.string, PropTypes.func])
} : void 0;
export default withStyles(styles, {
  name: 'MuiSlider'
})(Slider);