80 lines
3.1 KiB
80 lines
3.1 KiB
import Vue from 'vue'; |
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// v-dialogDrag: 弹窗拖拽属性 |
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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.cssText += ';cursor:move;' |
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dragDom.style.cssText += ';top:0px;' |
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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 = (() => { |
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if (window.document.currentStyle) { |
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return (dom, attr) => dom.currentStyle[attr]; |
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} else { |
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return (dom, attr) => getComputedStyle(dom, false)[attr]; |
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} |
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})() |
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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 = sty(dragDom, 'left'); |
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let styT = sty(dragDom, 'top'); |
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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 (styL.includes('%')) { |
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styL = +document.body.clientWidth * (+styL.replace(/\%/g, '') / 100); |
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styT = +document.body.clientHeight * (+styT.replace(/\%/g, '') / 100); |
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} else { |
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styL = +styL.replace(/\px/g, ''); |
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styT = +styT.replace(/\px/g, ''); |
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}; |
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document.onmousemove = function (e) { |
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// 通过事件委托，计算移动的距离 |
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let left = e.clientX - disX; |
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let top = e.clientY - disY; |
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// 边界处理 |
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if (-(left) > minDragDomLeft) { |
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left = -(minDragDomLeft); |
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} else if (left > maxDragDomLeft) { |
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left = maxDragDomLeft; |
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} |
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if (-(top) > minDragDomTop) { |
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top = -(minDragDomTop); |
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} else if (top > maxDragDomTop) { |
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top = maxDragDomTop; |
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} |
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// 移动当前元素 |
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dragDom.style.cssText += `;left:${left + styL}px;top:${top + styT}px;`; |
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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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