| 提交 | 用户 | age | ||
| 36b711 | 1 | export default { |
| L | 2 | bind(el, binding, vnode) { |
| 3 | const dialogHeaderEl = el.querySelector('.el-dialog__header') | |
| 4 | const dragDom = el.querySelector('.el-dialog') | |
| 5 | dialogHeaderEl.style.cssText += ';cursor:move;' | |
| 6 | dragDom.style.cssText += ';top:0px;' | |
| 7 | ||
| 8 | // 获取原有属性 ie dom元素.currentStyle 火狐谷歌 window.getComputedStyle(dom元素, null); | |
| 9 | const getStyle = (function() { | |
| 10 | if (window.document.currentStyle) { | |
| 11 | return (dom, attr) => dom.currentStyle[attr] | |
| 12 | } else { | |
| 13 | return (dom, attr) => getComputedStyle(dom, false)[attr] | |
| 14 | } | |
| 15 | })() | |
| 16 | ||
| 17 | dialogHeaderEl.onmousedown = (e) => { | |
| 18 | // 鼠标按下，计算当前元素距离可视区的距离 | |
| 19 | const disX = e.clientX - dialogHeaderEl.offsetLeft | |
| 20 | const disY = e.clientY - dialogHeaderEl.offsetTop | |
| 21 | ||
| 22 | const dragDomWidth = dragDom.offsetWidth | |
| 23 | const dragDomHeight = dragDom.offsetHeight | |
| 24 | ||
| 25 | const screenWidth = document.body.clientWidth | |
| 26 | const screenHeight = document.body.clientHeight | |
| 27 | ||
| 28 | const minDragDomLeft = dragDom.offsetLeft | |
| 29 | const maxDragDomLeft = screenWidth - dragDom.offsetLeft - dragDomWidth | |
| 30 | ||
| 31 | const minDragDomTop = dragDom.offsetTop | |
| 32 | const maxDragDomTop = screenHeight - dragDom.offsetTop - dragDomHeight | |
| 33 | ||
| 34 | // 获取到的值带px 正则匹配替换 | |
| 35 | let styL = getStyle(dragDom, 'left') | |
| 36 | let styT = getStyle(dragDom, 'top') | |
| 37 | ||
| 38 | if (styL.includes('%')) { | |
| 39 | styL = +document.body.clientWidth * (+styL.replace(/\%/g, '') / 100) | |
| 40 | styT = +document.body.clientHeight * (+styT.replace(/\%/g, '') / 100) | |
| 41 | } else { | |
| 42 | styL = +styL.replace(/\px/g, '') | |
| 43 | styT = +styT.replace(/\px/g, '') | |
| 44 | } | |
| 45 | ||
| 46 | document.onmousemove = function(e) { | |
| 47 | // 通过事件委托，计算移动的距离 | |
| 48 | let left = e.clientX - disX | |
| 49 | let top = e.clientY - disY | |
| 50 | ||
| 51 | // 边界处理 | |
| 52 | if (-(left) > minDragDomLeft) { | |
| 53 | left = -minDragDomLeft | |
| 54 | } else if (left > maxDragDomLeft) { | |
| 55 | left = maxDragDomLeft | |
| 56 | } | |
| 57 | ||
| 58 | if (-(top) > minDragDomTop) { | |
| 59 | top = -minDragDomTop | |
| 60 | } else if (top > maxDragDomTop) { | |
| 61 | top = maxDragDomTop | |
| 62 | } | |
| 63 | ||
| 64 | // 移动当前元素 | |
| 65 | dragDom.style.cssText += `;left:${left + styL}px;top:${top + styT}px;` | |
| 66 | ||
| 67 | // emit onDrag event | |
| 68 | vnode.child.$emit('dragDialog') | |
| 69 | } | |
| 70 | ||
| 71 | document.onmouseup = function(e) { | |
| 72 | document.onmousemove = null | |
| 73 | document.onmouseup = null | |
| 74 | } | |
| 75 | } | |
| 76 | } | |
| 77 | } | |
