CustomScrollbars.js
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import React,{PropTypes} from 'react';
import { Scrollbars } from 'react-custom-scrollbars';
import cx from 'classnames';
import s from './customScrollbarsLess.les'
export class CustomScrollbars extends React.Component {
constructor(props) {
super(props);
this.onScrollStart=this.onScrollStart.bind(this);
this.onScrollStop=this.onScrollStop.bind(this);
this.checkScroll=this.checkScroll.bind(this);
this.getRef=this.getRef.bind(this);
this.state={
vScrolling:false,
hScrolling:false,
showScroll:false
}
}
static propTypes = {
customName:PropTypes.string,
onScrollStart:PropTypes.func,
onScrollStop:PropTypes.func,
loadWay:PropTypes.string,
children:PropTypes.oneOfType([
PropTypes.element,
PropTypes.array
]),
loadMore:PropTypes.func,
isLoad:PropTypes.bool,
viewStyle:PropTypes.object,
theme:PropTypes.string
}
static defaultProps={
customName:'custom_scroll',
onScrollStart:()=>{},
onScrollStop:()=>{},
loadMore:()=>{},
loadWay:'up',//'down'
isLoad:false,
viewStyle:{
paddingRight:'10px'
},
theme:'black' //white
}
onScrollStart(){
const {onScrollStart}=this.props;
const {my_scrollbar}=this.refs;
const {top,scrollTop,scrollHeight,clientHeight,left}=my_scrollbar.getValues();
this._preScrollTop=scrollTop;
this._preLeft=left;
this._preTop=top;
this.setState({
vScrolling:true,
hScrolling:true
})
onScrollStart();
}
onScrollStop(){
const {onScrollStart}=this.props;
const {my_scrollbar}=this.refs;
const {top,scrollTop,scrollHeight,clientHeight}=my_scrollbar.getValues();
const {loadMore,isLoad,loadWay}=this.props;
const preTop=this._preScrollTop;
if(!isLoad&&loadWay=='up'&&top<0.1&&preTop>scrollTop){
loadMore(my_scrollbar.getValues());
}else if(!isLoad&&loadWay=='down'&&top>0.9&&preTop<scrollTop){
loadMore(my_scrollbar.getValues());
}
this.setState({
vScrolling:false,
hScrolling:false
})
onScrollStart();
}
checkScroll(){
const {clientHeight,scrollHeight}=this.refs['my_scrollbar'].getValues();
if(clientHeight<scrollHeight){
if(!this.state.showScroll)
this.setState({
showScroll:true
})
}else{
if(this.state.showScroll)
this.setState({
showScroll:false
})
}
}
componentDidMount(){
this.checkScroll();
window.addEventListener('resize', this.checkScroll);
}
componentWillReceiveProps(nextProps){
}
componentDidUpdate(prevProps,prevState){
this.checkScroll()
}
componentWillUnmount() {
window.removeEventListener('resize', this.checkScroll);
}
getRef(){
return this.refs['my_scrollbar'];
}
render(){
const {vScrolling,hScrolling,showScroll}=this.state,self=this;
const {viewStyle,theme,customName}=this.props;
const trackStyle={position:'absolute',width:'8px',right: '0px',bottom: '2px',top: '2px',borderRadius: '3px',cursor: 'pointer'}
if(showScroll){
trackStyle['backgroundColor']='rgba(0,0,0,.05)';
trackStyle['filter']='alpha(opacity=40)';
trackStyle['msFilter']='alpha(opacity=40)';
}
const horizontalTrackStyle={backgroundColor:'rgba(0,0,0,.05)',filter:'alpha(opacity=40)',msFilter:'alpha(opacity=40)',position: 'absolute',height: '8px',right: '10px',bottom: '2px',left: '2px',borderRadius: '3px',cursor: 'pointer'}
return(
<Scrollbars ref='my_scrollbar'
renderView={props =>{
const {style={}}=props;
const myStyle=Object.assign({},style,viewStyle);
return <div {...props} style={{...myStyle,backgroundColor:'transparent'}} id={customName} className={s.my_scrollbars}/>
}
}
renderTrackHorizontal={props => {
if(this.refs.my_scrollbar){
const {clientWidth,scrollWidth}=this.refs.my_scrollbar.getValues();
if(scrollWidth>clientWidth){
return <div {...props} style={horizontalTrackStyle} />
}else{
return <div {...props} />
}
}else{
return <div {...props} />
}
}
}
renderTrackVertical={props =>{
return <div {...props} style={trackStyle}/>
}
}
renderThumbHorizontal={props =>{
const style={transition:'opacity .2s ease-in-out,background-color .2s ease-in-out',position: 'relative',display: 'block', height: '100%', cursor: 'pointer', borderRadius: 'inherit',backgroundColor:'rgba(0, 0, 0, 0.2)'};
if(hScrolling){
style.backgroundColor='rgba(0, 0, 0, 0.5)';
}
const temp=Object.assign({},props,style);
if(this.refs.my_scrollbar){
const {clientWidth,scrollWidth}=this.refs.my_scrollbar.getValues();
if(scrollWidth>clientWidth){
return <div style={temp} />
}else{
return <div {...props} />
}
}else{
return <div {...props} />
}
}
}
renderThumbVertical={props => {
const style={transition:'opacity .2s ease-in-out,background-color .2s ease-in-out',position: 'relative',display: 'block', width: '100%', cursor: 'pointer', borderRadius: 'inherit',backgroundColor:'rgba(0, 0, 0, 0.2)'};
if(vScrolling){
style.backgroundColor=theme=='white'?'rgba(255, 255, 255, 0.3)':'rgba(0, 0, 0, 0.5)';
}
return <div {...props} style={style}/>
}
}
onScrollStart={this.onScrollStart}
onScrollStop={this.onScrollStop}
>
{this.props.children}
</Scrollbars>
)
}
}
export default CustomScrollbars