C/C++的部分笔记

项目中依赖

"react-virtualized-auto-sizer": "^1.0.20",
"react-window": "^1.8.9",

日常使用

<AutoSizer>
    {({ height, width }: {height: number, width: number}) => (
        <List 
            height={height}
            itemCount={curMonitorList.length}
            itemSize={48}
            width={width}>
            {renderOrgItem}
        </List>
        )
    }
</AutoSizer>

目前未找到方案，所以重新写了一个自定义组件完成AutoSizer要办的事

import { useEffect, useState, useRef } from "react";
interface PropsType{
    children: any
}
export default function AzAutoSizer({children}: PropsType) {
    const curRef = useRef<HTMLDivElement>(null)
    const [curWidthHeight, setCurWidthHeight] = useState({
        height: 0,
        width: 0,
    });
    const handleClick = () => {
        if (curRef.current) {
            const parentNode: any = curRef.current.parentNode;
            const height = parentNode.offsetHeight;
            const width = parentNode.offsetWidth;
            curWidthHeight.height = height || 0;
            curWidthHeight.width = width || 0;
            setCurWidthHeight({...curWidthHeight});
        }
    };
    useEffect(() => {
        handleClick();
        const handleResize = () => {
            /*   如果示父或祖先disabled: none时,其父高度宽度都为0;
                if (!curRef.current) { return; }
                const parentNode: any = curRef.current.parentNode;
                const height = parentNode.offsetHeight
                const width = parentNode.offsetWidth;
                // 表示父或祖先disabled: none;
                if (height === 0 && width === 0) {
                    return;
                }
            */
            handleClick();
        };
        /* 监听窗口改变 */
        window.addEventListener('resize', handleResize);
        /* 是否进入可视化-1.创建观察函数 */
        const observer = new IntersectionObserver(([{ isIntersecting }]) => {
            if (isIntersecting) {
                if (!curRef.current) { return; }
                if (curWidthHeight.height !== 0 && curWidthHeight.width !== 0) {
                    /* 如果这段代码放出来的话要解开resize那边的代码判断，才能满足父或祖先元素disabled:none时组件宽高被重置为none
                    */
                    // observer.unobserve(curRef.current);
                } else {
                    handleClick();
                }
            }
        });
        /* 是否进入可视化-1.监听当前元素 */
        curRef.current && observer.observe(curRef.current);
        
        return () => {
            /* 卸载窗口监听 */
            window.removeEventListener('resize', handleResize);
            /* 卸载可视化监听 */
            if (curRef.current) {
                observer.unobserve(curRef.current);
            }
        };
    }, []);
    
    return <div ref={curRef} style={{width: `${curWidthHeight.width}px`, height: `${ curWidthHeight.height}px`}}>
        {children({height: curWidthHeight.height, width: curWidthHeight.width})}
    </div>
}

使用方法

<AzAutoSizer >
    {({ height, width }: {height: number, width: number}) => (
        <List 
            height={height}
            itemCount={curMonitorList.length}
            itemSize={48}
            width={width}>
            {renderOrgItem}
        </List>
        )
    }
</AzAutoSizer>