added DragAndDrop component
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src/components/DragAndDrop.tsx
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80
src/components/DragAndDrop.tsx
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import React from "react"
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import { useState } from "react"
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import { useEffect } from "react"
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import style from "./../style/DragAndDrop.module.scss"
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interface Props {
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onDrop?: ()=>void
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onEnter?: (event: DragEvent)=>void
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onLeave?: (event: DragEvent)=>void
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onDragOver?: (event: DragEvent)=>void
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handleDrop?: (files: FileList)=>void
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}
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const DragAndDrop: React.FC<Props> = (props) => {
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const dropRef = React.createRef<HTMLDivElement>()
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const [hover,setHover] = useState(false)
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function handleDragEnter(event: DragEvent) {
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// console.debug("dragenter",event)
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event.preventDefault()
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event.stopPropagation()
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setHover(true)
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props.onEnter?.(event)
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}
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function handleDragLeave(event: DragEvent) {
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// console.debug("dragleave",event)
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event.preventDefault()
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event.stopPropagation()
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setHover(false)
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props.onLeave?.(event)
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}
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function handleDragOver(event:DragEvent) {
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event.preventDefault()
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event.stopPropagation()
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setHover(true)
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props.onDragOver?.(event)
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}
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function handleDrop(event: DragEvent) {
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console.debug("drop",event)
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event.preventDefault()
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event.stopPropagation()
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setHover(false)
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props.onDrop?.()
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if (event.dataTransfer?.files && event.dataTransfer.files.length > 0) {
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props.handleDrop?.(event.dataTransfer.files)
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// event.dataTransfer.clearData()
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}
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}
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useEffect(()=>{
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if(dropRef.current){
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console.debug("Add drag event listner")
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dropRef.current.addEventListener("dragenter",handleDragEnter)
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dropRef.current.addEventListener("dragleave",handleDragLeave)
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dropRef.current.addEventListener("dragover",handleDragOver)
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dropRef.current.addEventListener("drop",handleDrop)
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return ()=>{
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if (dropRef.current){
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console.debug("Remove drag event listner")
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dropRef.current.removeEventListener("dragenter",handleDragEnter)
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dropRef.current.removeEventListener("dragleave",handleDragLeave)
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dropRef.current.removeEventListener("dragover",handleDragOver)
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dropRef.current.removeEventListener("drop",handleDrop)
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}
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}
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}
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},[])
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return (
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<div ref={dropRef} className={`${style.dragAndDrop} ${hover? style.active:""}`}>
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{props.children}
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</div>
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)
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}
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export default DragAndDrop
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21
src/style/DragAndDrop.module.scss
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21
src/style/DragAndDrop.module.scss
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.active{
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border: dashed grey 4px;
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background-color: rgba(255,255,255,.8);
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position: absolute;
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top: 0;
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bottom: 0;
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left: 0;
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right: 0;
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z-index: 2;
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}
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.dragAndDrop{
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top: 0;
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bottom: 0;
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left: 0;
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right: 0;
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width: 100%;
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height: 100%;
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position: absolute;
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z-index: 2;
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}
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