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>
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