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73 lines
3.2 KiB
73 lines
3.2 KiB
3 years ago
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import Vue from 'vue'
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// v-dialogDrag: 弹窗拖拽
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Vue.directive('dialogDrag', {
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bind (el, binding, vnode, oldVnode) {
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const dialogHeaderEl = el.querySelector('.el-dialog__header')
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const dragDom = el.querySelector('.el-dialog')
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dialogHeaderEl.style.cursor = 'move'
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// 获取原有属性 ie dom元素.currentStyle 火狐谷歌 window.getComputedStyle(dom元素, null);
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const sty = dragDom.currentStyle || window.getComputedStyle(dragDom, null)
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dialogHeaderEl.onmousedown = (e) => {
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// 鼠标按下，计算当前元素距离可视区的距离
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const disX = e.clientX - dialogHeaderEl.offsetLeft
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const disY = e.clientY - dialogHeaderEl.offsetTop
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const screenWidth = document.body.clientWidth; // body当前宽度
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const screenHeight = document.documentElement.clientHeight; // 可见区域高度(应为body高度，可某些环境下无法获取)
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const dragDomWidth = dragDom.offsetWidth; // 对话框宽度
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const dragDomheight = dragDom.offsetHeight; // 对话框高度
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const minDragDomLeft = dragDom.offsetLeft;
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const maxDragDomLeft = screenWidth - dragDom.offsetLeft - dragDomWidth;
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const minDragDomTop = dragDom.offsetTop;
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const maxDragDomTop = screenHeight - dragDom.offsetTop - dragDomheight;
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// 获取到的值带px 正则匹配替换
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let styL, styT
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// 注意在ie中 第一次获取到的值为组件自带50% 移动之后赋值为px
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if (sty.left.includes('%')) {
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styL = +document.body.clientWidth * (+sty.left.replace(/\%/g, '') / 100)
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styT = +document.body.clientHeight * (+sty.top.replace(/\%/g, '') / 100)
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} else {
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styL = +sty.left.replace(/\px/g, '')
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styT = +sty.top.replace(/\px/g, '')
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}
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document.onmousemove = function (e) {
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// 获取body的页面可视宽高
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// var clientHeight = document.documentElement.clientHeight || document.body.clientHeight
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// var clientWidth = document.documentElement.clientWidth || document.body.clientWidth
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// 通过事件委托，计算移动的距离
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var l = e.clientX - disX
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var t = e.clientY - disY
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// 边界处理
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if (-l > minDragDomLeft) {
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l = -minDragDomLeft;
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} else if (l > maxDragDomLeft) {
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l = maxDragDomLeft;
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}
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if (-t > minDragDomTop) {
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t = -minDragDomTop;
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} else if (t > maxDragDomTop) {
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t = maxDragDomTop;
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}
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// 移动当前元素
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dragDom.style.left = `${l + styL}px`
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dragDom.style.top = `${t + styT}px`
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// 将此时的位置传出去
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// binding.value({x:e.pageX,y:e.pageY})
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}
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document.onmouseup = function (e) {
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document.onmousemove = null
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document.onmouseup = null
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}
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}
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}
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})
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