el-dialog开启拖拽功能
2021/7/26 6:07:59
本文主要是介绍el-dialog开启拖拽功能,对大家解决编程问题具有一定的参考价值,需要的程序猿们随着小编来一起学习吧!
自定义指令v-drag
/** * @description 自定义指令v-drag */ Vue.directive('drag', { bind(el, binding, vNode) { if ( el.querySelector('.el-dialog__header') && el.querySelector('.el-dialog') ) { const dialogHeaderEl = el.querySelector('.el-dialog__header') const dragDom = el.querySelector('.el-dialog') dialogHeaderEl.style.cssText += ';cursor:move;' dragDom.style.cssText += ';top:0;' const getStyle = (function () { if (window.document.currentStyle) { return (dom, attr) => dom.currentStyle[attr] } else { return (dom, attr) => getComputedStyle(dom, null)[attr] } })() dialogHeaderEl.onmousedown = (e) => { const disX = e.clientX - dialogHeaderEl.offsetLeft const disY = e.clientY - dialogHeaderEl.offsetTop const dragDomWidth = dragDom.offsetWidth const dragDomHeight = dragDom.offsetHeight const screenWidth = document.body.clientWidth const screenHeight = document.body.clientHeight const minDragDomLeft = dragDom.offsetLeft const maxDragDomLeft = screenWidth - dragDom.offsetLeft - dragDomWidth const minDragDomTop = dragDom.offsetTop const maxDragDomTop = screenHeight - dragDom.offsetTop - dragDomHeight let styL = getStyle(dragDom, 'left') let styT = getStyle(dragDom, 'top') if (styL.includes('%')) { styL = +document.body.clientWidth * (+styL / 100) styT = +document.body.clientHeight * (+styT / 100) } else { styL = +styL.slice(0, -2) styT = +styT.slice(0, -2) } document.onmousemove = function (e) { let left = e.clientX - disX let top = e.clientY - disY if (-left > minDragDomLeft) { left = -minDragDomLeft } else if (left > maxDragDomLeft) { left = maxDragDomLeft } if (-top > minDragDomTop) { top = -minDragDomTop } else if (top > maxDragDomTop) { top = maxDragDomTop } dragDom.style.cssText += `;left:${left + styL}px;top:${top + styT}px;` vNode.child.$emit('drag-dialog') } document.onmouseup = function () { document.onmousemove = null document.onmouseup = null } } } }, })
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