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| /**
* @category controls
* @component slider
* @variations collab-ui-react
*/
import React from 'react';
import PropTypes from 'prop-types';
import SliderPointer from '@collab-ui/react/Slider/SliderPointer';
class Slider extends React.Component {
state = {
sliderLow: this.props.value.low || this.props.min,
sliderHigh: this.props.value.high || this.props.value,
scale: [this.props.min, this.props.max],
selectionWidth: null,
}
componentWillMount() {
const { min, max, tick } = this.props;
tick && this.getScale(min, max, tick);
this.getSelectionWidth();
}
componentDidMount() {
const { min, max } = this.props;
const { scale } = this.state;
this.setScalePos(scale, min, max);
}
setScalePos = (scale, min, max) => {
this.ticksContainer && this.ticksContainer.childNodes.forEach((child, idx) => {
const leftValue = `${(scale[idx] - min) / max * 100}%`;
child.style.left = `calc(${leftValue} - ${(child.offsetWidth/2)}px)`;
});
};
getScale = (low = 0, high, tick) => {
let value = high;
let ticksArray = [high];
while (value > 0 && (value - tick) >= low) {
value -= tick;
ticksArray.unshift(Math.abs(Math.round(value / tick) * tick));
}
this.setState({ scale: ticksArray });
};
getSliderWidth = () => {
return this.sliderBar.getBoundingClientRect().width;
};
getStepWidth = () => {
const maxValue = this.props.max - this.props.min;
const maxWidth = this.getSliderWidth();
return (this.props.step / maxValue) * maxWidth;
};
getSteps = (position) => {
if (position.isKeyBoard) return 1;
const diff = position.direction === 1 ? position.to - position.from : position.from - position.to;
Iif (diff < 0) return 0;
const steps = diff / this.getStepWidth();
return steps - Math.floor(steps) >= 0.5 ? Math.ceil(steps) : Math.floor(steps);
};
getLimit = (pointerKey, direction) => {
if (pointerKey === 'sliderLow') {
return this.props.canCross
? direction === 1 ? this.props.max : this.props.min
: direction === 1 ? this.state.sliderHigh : this.props.min;
} else Eif (pointerKey === 'sliderHigh') {
return this.props.canCross
? direction === 1 ? this.props.max : this.props.min
: direction === 1 ? this.props.max : this.state.sliderLow;
}
};
returnCurrentValues = () => {
this.getSelectionWidth();
Eif (this.props.onChange) {
return this.props.onChange(
typeof this.props.value === 'object'
?
{
low: Math.min(this.state.sliderHigh, this.state.sliderLow),
high: Math.max(this.state.sliderHigh, this.state.sliderLow)
}
: this.state.sliderHigh
);
}
};
moveForward = (key, pixelMove, limit) => {
const newPosition = this.state[key] + pixelMove <= limit
? this.state[key] + pixelMove
: limit;
this.setState({
[key]: newPosition
}, () => this.returnCurrentValues());
};
moveBack = (key, pixelMove, limit) => {
const newPosition = this.state[key] - pixelMove >= limit
? this.state[key] - pixelMove
: limit;
this.setState({
[key]: newPosition
}, () => this.returnCurrentValues());
};
onSliderMove = (key, position) => {
Iif (this.props.disabled) return;
const limit = this.getLimit(key, position.direction);
const pixelMove = this.getSteps(position) * this.props.step;
position.direction === 1 ? this.moveForward(key, pixelMove, limit) : this.moveBack(key, pixelMove, limit);
};
getSelectionWidth = () => {
const baseValue = Number.isInteger(this.state.sliderLow) ? this.state.sliderLow : this.props.min;
this.setState({
selectionWidth: {
width: `${(Math.abs(this.state.sliderHigh - baseValue) / this.props.max) * 100}%`,
left: `${((Math.min(baseValue, this.state.sliderHigh) - this.props.min) / this.props.max) * 100}%`
}
});
};
render() {
const { value, disabled, className, max, min, translateFn } = this.props;
const { sliderHigh, sliderLow, scale, selectionWidth } = this.state;
const renderTicks = () => {
const ticks = scale.map((tickValue, idx) => {
const tickLabel = translateFn ? translateFn(tickValue) : tickValue;
return (
<span key={`tick-${idx}`} className='cui-slider__hashlabel'>
{tickLabel}
</span>
);
});
return (
<div ref={ref => this.ticksContainer = ref}>
{ticks}
</div>
);
};
return (
<div className={
`cui-slider ${className}` +
`${(disabled && ` cui-slider--disabled`) || ''}` +
`${(className && ` ${className}`) || ''}`
}
>
<span className='cui-slider__bar' ref={ref => this.sliderBar = ref} />
<span className='cui-slider__selection' style={selectionWidth} />
{
Number.isInteger(value.low)
&&
<SliderPointer
position={((sliderLow - min) / (max - min)) * 100}
onMove={(b) => this.onSliderMove('sliderLow', b)}
ref={ref => this.sliderLow = ref}
/>
}
<SliderPointer
position={((sliderHigh - min) / (max - min)) * 100}
onMove={(b) => this.onSliderMove('sliderHigh', b)}
ref={ref => this.sliderHigh = ref}
/>
{renderTicks()}
</div>
);
}
}
Slider.propTypes = {
/** @prop Determines if minimum pointer can cross over maximum pointer | false */
canCross: PropTypes.bool,
/** @prop Optional CSS class string | '' */
className: PropTypes.string,
/** @prop Set the attribute disabled to Slider | false */
disabled: PropTypes.bool,
/** @prop Set the initial maximum value */
max: PropTypes.number.isRequired,
/** @prop Set the initial minimum value | 0 */
min: PropTypes.number,
/** @prop Callback function invoked by user when change a pointer position | null */
onChange: PropTypes.func,
/** @prop Set visual step measurement | 1 */
step: PropTypes.number,
/** @prop Set increment of x-axis labels | 0 */
tick: PropTypes.number,
/** @prop Function to compute layout of Slider | null */
translateFn: PropTypes.func,
/** @prop Set either maximum pointer value or a combination of high and low pointer values | 0 */
value: PropTypes.oneOfType([
PropTypes.shape({
high: PropTypes.number.isRequired,
low: PropTypes.number.isRequired,
}),
PropTypes.number
])
};
Slider.defaultProps = {
canCross: false,
className: '',
disabled: false,
min: 0,
onChange: null,
step: 1,
tick: 0,
translateFn: null,
value: 0
};
Slider.displayName = 'Slider';
export default Slider;
/**
* @component slider
* @section default
* @react
import { Slider } from '@collab-ui/react';
export default class DefaultSlider extends React.Component {
render() {
return (
<Slider
min={0}
max={500}
tick={100}
value={200}
step={1}
/>
);
}
}
**/
/**
* @component slider
* @section two-handles
* @react
import { Slider } from '@collab-ui/react';
export default class SliderTwoHandles extends React.Component {
state = {
slider1: {low: 100, high: 200},
}
render() {
return (
<div className="row" key="child-0">
<div>
Low: {this.state.slider1.low} High: {this.state.slider1.high}
</div>
<Slider
min={0}
max={500}
tick={100}
value={this.state.slider1}
step={1}
onChange={value => this.setState({ slider1: value })}
/>
</div>
);
}
}
**/
/**
* @component slider
* @section cross
* @react
import { Slider } from '@collab-ui/react';
export default class SliderCross extends React.Component {
state = {
slider1: {low: 100, high: 200},
}
render() {
return (
<div className="row" key="child-2">
<div>
Low: {this.state.slider1.low} High: {this.state.slider1.high}
</div>
<Slider
min={0}
max={500}
tick={100}
value={this.state.slider1}
step={1}
canCross
onChange={value => this.setState({ slider1: value })}
/>
</div>
);
}
}
**/
/**
* @component slider
* @section step
* @react
import { Slider } from '@collab-ui/react';
export default class SliderStep extends React.Component {
state = {
slider1: { low: 100, high: 200 },
slider2: { low: 100, high: 200 },
}
render() {
return (
<span>
<div className="row" key='child-0'>
<div>Low: {this.state.slider1.low} High: {this.state.slider1.high}</div>
<Slider
min={0}
max={500}
tick={100}
value={this.state.slider1}
step={20}
canCross
onChange={value => this.setState({ slider1: value })}
/>
</div>
<br key='child-1' />
<div className="row" key='child-2'>
<div>Low: {this.state.slider2.low} High: {this.state.slider2.high}</div>
<Slider
min={0}
max={500}
tick={100}
value={this.state.slider2}
step={50}
canCross
onChange={value => this.setState({ slider2: value })}
/>
</div>
</span>
);
}
}
**/
|