React-beautiful-dnd 拖曳组件

本文主要是介绍React-beautiful-dnd 拖曳组件，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

React-beautiful-dnd 实例demo

src/routes/IndexPage.js

import React, { Component } from "react";
// import '@atlaskit/css-reset'
import { DragDropContext } from "react-beautiful-dnd";
import styled from "styled-components";import initialData from "../components/todoData";
import Column from "../components/column";const Container = styled.div`display: flex;
`;export default class IndexPage extends Component {state = initialData;onDragEnd = (result) => {const { destination, source, draggableId } = result;// 如果没有拖动直接结束if (!destination) {return;}// 如果拖动列没有改变并且顺序没有改变则直接结束if (destination.droppableId === source.droppableId &&destination.index === source.index) {return;}const start = this.state.columns[source.droppableId];const finish = this.state.columns[destination.droppableId];console.log("start", start);console.log("finish", finish);// 如果在当前列拖动 在当前列重排列if (start === finish) {const newTaskIds = Array.from(start.taskIds);newTaskIds.splice(source.index, 1);newTaskIds.splice(destination.index, 0, draggableId);const newColumn = {...start,taskIds: newTaskIds,};const newState = {...this.state,columns: {...this.state.columns,[newColumn.id]: newColumn,},};this.setState(newState);return;}// 拖动至非当前列的操作const startTaskIds = Array.from(start.taskIds);// 从拖动源头列删除该项startTaskIds.splice(source.index, 1);const newStart = {...start,taskIds: startTaskIds,};// 添加至目标列表const finishTaskIds = Array.from(finish.taskIds);finishTaskIds.splice(destination.index, 0, draggableId);const newFinish = {...finish,taskIds: finishTaskIds,};// 更新stateconst newState = {...this.state,columns: {...this.state.columns,[newStart.id]: newStart,[newFinish.id]: newFinish,},};this.setState(newState);};render() {return (<DragDropContext onDragEnd={this.onDragEnd}><Container>{this.state.columnOrder.map((columnId) => {const column = this.state.columns[columnId];const tasks = column.taskIds.map((taskId) => this.state.tasks[taskId]);return <Column key={column.id} column={column} tasks={tasks} />;})}</Container></DragDropContext>);}
}

colum.js

import React, { Component } from "react";
import styled from "styled-components";
import Task from "./task";
import { Droppable } from "react-beautiful-dnd";const Container = styled.div`margin: 8px;border: 1px solid lightgrey;border-radius: 2px;width: 220px;display: flex;flex-direction: column;
`;
const Title = styled.h3`padding: 8px;
`;
const TaskList = styled.div`padding: 8px;transition: background-color 0.2s ease;background-color: ${(props) => (props.isDraggingOver ? "skyblue" : "white")};flex-grow: 1;min-height: 100px;
`;export default class Column extends Component {render() {return (<Container><Title>{this.props.column.title}</Title><Droppable droppableId={this.props.column.id} type="TASK">{(provided, snapshot) => (<TaskListref={provided.innerRef}{...provided.droppableProps}isDraggingOver={snapshot.isDraggingOver}>{this.props.tasks.map((task, index) => (<Task key={task.id} task={task} index={index} />))}{provided.placeholder}</TaskList>)}</Droppable></Container>);}
}

task.js

import React, { Component } from "react";
import styled from "styled-components";
import { Draggable } from "react-beautiful-dnd";const Container = styled.div`border: 1px solid lightgrey;border-radius: 2px;padding: 8px;margin-bottom: 8px;transition: background-color 0.2s ease;background-color: ${(props) =>props.isDragDisabled? "lightgrey": props.isDragging? "lightgreen": "white"};
`;export default class Task extends Component {render() {// const isDragDisabled = this.props.task.id === 'task-1'return (<DraggabledraggableId={this.props.task.id}index={this.props.index}// isDragDisabled={isDragDisabled}>{(provided, snapshot) => {console.log("provided", provided);console.log("snapshot", snapshot);return (<Container{...provided.draggableProps}{...provided.dragHandleProps}ref={provided.innerRef}isDragging={snapshot.isDragging}>{this.props.task.content}</Container>);}}</Draggable>);}
}

data.js

const initialData = {tasks: {"task-1": { id: "task-1", content: "吃饭" },"task-2": { id: "task-2", content: "睡觉" },"task-3": { id: "task-3", content: "打豆豆" },"task-4": { id: "task-4", content: "coding" },},columns: {"column-1": {id: "column-1",title: "TODO",taskIds: ["task-1", "task-2", "task-3", "task-4"],},"column-2": {id: "column-2",title: "TODOING",taskIds: [],},"column-3": {id: "column-3",title: "FINISH",taskIds: [],},},columnOrder: ["column-1", "column-2", "column-3"],
};export default initialData;

这篇关于React-beautiful-dnd 拖曳组件的文章就介绍到这儿，希望我们推荐的文章对编程师们有所帮助！

---