外层大盒子处理分发的拖拽事件,里层的盒子负责展示各个Item的内容;
实现方式;1. 在component里面新建dragBox.vue 来存放外层的盒子,通过插槽实现子元素的嵌套; 2. 在component里面新建dragItem.vue 通过插槽实现drag-item内部元素的嵌套; 3.新建list.vue 来引入在component中新建的组件,进行调用,同时处理需要拖动的一些逻辑;
list.vue中的内容代码;
<template> <div style="width: 100%; height:100%; border:1px solid #ccc;"> <drag-box ref="dragBox" style="width: 100%; height: 100%;"> <drag-item :style="{'width': !dragHide ? '100%' : '20%'}"> <!------用来设置一开始是100%的宽度,详情出现时第一个drag-item 的内容呈现20%-------> <div @click="dragChange">列表内容呈现</div> <!-----可以将需要的内容直接写在这里,也可以设置引用组件进行使用-------> </drag-item> <drag-item v-if="dragHide" :resize-show="false">详情内容呈现</drag-item> </drag-box> </div> </template> <script> import dragBox from './component/dragBox' import dragItem from './component/dragItem' export default { components: { dragBox, dragItem }, data() { return { defaultFlex: true, resizeBox: null, currentBox: null, rightBox: null, curLen: 0, otherBoxWidth: 0, startX: 0, dragHide: false } }, mounted() { this.setDragItemFlex() this.dragControllerDiv() }, methods: { dragChange() { this.dragHide = true }, onMouseDown(e) { this.resizeBox = e.target this.currentBox = this.resizeBox.parentNode// 当前盒子 this.rightBox = this.getNextElement(this.currentBox)// 当前盒子的下个兄弟节点 if (!this.rightBox) return this.curLen = this.currentBox.clientWidth this.otherBoxWidth = this.$refs.dragBox.clientWidth - this.currentBox.clientWidth - this.rightBox.clientWidth // 其他盒子的宽度 // 颜色改变提醒 this.resizeBox.style.background = '#818181' this.startX = e.clientX document.addEventListener('mousemove', this.onMousemove) document.addEventListener('mouseup', this.onMouseup) }, onMouseup() { // 颜色恢复 this.resizeBox.style.background = '#d6d6d6' document.removeEventListener('mousedown', this.onMouseDown) document.removeEventListener('mousemove', this.onMousemove) }, onMousemove(e) { const endX = e.clientX const moveLen = endX - this.startX // (endx-startx)= 移动的距离 const CurBoxLen = this.curLen + moveLen // resize[i].left+移动的距离=左边区域最后的宽度 const rightBoxLen = this.$refs.dragBox.clientWidth - CurBoxLen - this.otherBoxWidth // 右侧宽度=总宽度-左侧宽度-其它盒子宽度 // 当最小宽度时,无法继续拖动 if (CurBoxLen <= 200 || rightBoxLen <= 200) return this.currentBox.style.width = CurBoxLen + 'px'// 当前盒子的宽度 this.resizeBox.style.left = CurBoxLen // 设置左侧区域的宽度 this.rightBox.style.width = rightBoxLen + 'px' }, // 获取下一个兄弟元素的兼容函数 getNextElement(element) { if (element.nextElementSibling) { return element.nextElementSibling } else { var next = element.nextSibling// 下一个兄弟节点 while (next && next.nodeType !== 1) { // 有 并且 不是我想要的 next = next.nextSibling } return next } }, dragControllerDiv() { const resize = document.getElementsByClassName('resize') // 拖拽条 // 循环为每个拖拽条添加事件 for (let i = 0; i < resize.length; i++) { // 鼠标按下事件 resize[i].addEventListener('mousedown', this.onMouseDown) } }, // 如果dragItem 没有定义宽度,则flex=1 setDragItemFlex() { const dragBox = this.$refs.dragBox const childsLen = dragBox.$children.length for (let i = 0; i < childsLen; i++) { const node = dragBox.$children[i] if (!node.$el.style.width) { // 如果没有定义宽度,则flex=1 node.$el.style.flex = 1 } } } } } </script> <style lang="scss" scoped> </style>
dragBox.vue
<template> <div style="display: flex; width: 100%; height: 100%;"> <slot /> </div> </template> <script> export default { name: 'DragBox', data() { return {} }, methods: {} } </script> <style lang="scss" scoped> </style>
dragItem.vue
<template> <!-- <div ref="container" class="d-flex" style="min-width: 200px; position: relative;"> --> <div ref="container" class="d-flex" style="position: relative;"> <div style="width: 100%; height: 100%;"> <slot /> </div> <!-- 拖拽条 --> <div v-if="resizeShow" class="resize" /> </div> </template> <script> export default { name: 'DragItem', props: { // 控制拖拽条的是否显示,默认显示 resizeShow: { type: Boolean, default: true } } } </script> <style> .resize { position: absolute; top: 0; right: 0; width: 2px; height: 100%; cursor: col-resize; background-color: #f2f2f2; } </style>