export default {
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bind(el, binding, vnode, oldVnode) {
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const resizeEvent = new CustomEvent('drag-resize', {
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detail: '尺寸变化',
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bubbles: false
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})
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// 初始化不最大化
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el.fullscreen = false
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// 弹框可拉伸最小宽高
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const minWidth = 1100
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const minHeight = 570
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// 当前宽高
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let nowWidth = minWidth
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// eslint-disable-next-line no-unused-vars
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let nowHight = minHeight
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// 当前顶部高度
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let nowMarginTop = 0
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// 获取弹框头部（这部分可双击全屏）
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const dialogHeaderEl = el.querySelector('.el-dialog__header')
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let hasSetBodyHight = false
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// 弹窗
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const dragDom = el.querySelector('.el-dialog')
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el.style.overflow = 'initial'
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dragDom.className += ' el-drag-dialog'
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// 给弹窗加上overflow auto；不然缩小时框内的标签可能超出dialog；
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dragDom.style.overflow = 'auto'
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// 清除选择头部文字效果
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// eslint-disable-next-line no-new-func
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dialogHeaderEl.onselectstart = new Function('return false')
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// 头部加上可拖动cursor
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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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// 头部插入最大化最小化元素
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const maxMin = document.createElement('button')
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maxMin.className += ' el-dialog__headerbtn el-dialog__minmax'
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maxMin.style.right = '40px'
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maxMin.style.color = '#ffffff'
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maxMin.title = el.fullscreen ? '还原' : '最大化'
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maxMin.innerHTML = '<i class=' + (el.fullscreen ? '"el-icon-crop"' : '"el-icon-full-screen"') + ' onMouseOver="this.style.color=\'#409EFF\'" onMouseOut="this.style.color=\'inherit\'"></i>'
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dialogHeaderEl.insertBefore(maxMin, dialogHeaderEl.childNodes[1])
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const moveDown = (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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// 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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// 通过事件委托，计算移动的距离
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const l = e.clientX - disX
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const t = e.clientY - disY
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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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dialogHeaderEl.onmousedown = moveDown
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let bodyHeight = 'auto'
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function setMaxMin() {
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if (el.fullscreen) {
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let i = maxMin.querySelector('.el-icon-crop');
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i.classList.remove('el-icon-crop');
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i.classList.add('el-icon-full-screen');
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maxMin.innerHTML = '<i class="el-icon-full-screen"></i>';
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maxMin.title = '最大化';
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dragDom.style.height = nowHight + 'px';
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dragDom.style.width = nowWidth + 'px';
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dragDom.style.marginTop = window.innerHeight * 0.07 + 'px';
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el.fullscreen = false;
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dialogHeaderEl.style.cursor = 'move';
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dialogHeaderEl.onmousedown = moveDown;
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// dragDom.querySelector('.el-dialog__body').style.height = bodyHeight;
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hasSetBodyHight = false;
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} else {
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const i = maxMin.querySelector('.el-icon-full-screen')
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i.classList.remove('el-icon-full-screen')
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i.classList.add('el-icon-crop')
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maxMin.title = '还原'
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bodyHeight = dragDom.querySelector('.el-dialog__body').offsetHeight + 'px'
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nowHight = dragDom.clientHeight
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nowWidth = dragDom.clientWidth
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nowMarginTop = dragDom.style.marginTop
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dragDom.style.left = 0
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dragDom.style.top = 0
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dragDom.style.height = window.innerHeight + 'px'
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dragDom.style.width = '100VW'
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dragDom.style.marginTop = 0
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el.fullscreen = true
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dialogHeaderEl.style.cursor = 'initial'
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dialogHeaderEl.onmousedown = null
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if (!hasSetBodyHight) {
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const footerHeight = dragDom.querySelector('.el-dialog__footer') && dragDom.querySelector('.el-dialog__footer').offsetHeight
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// dragDom.querySelector('.el-dialog__body').style.height =
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// 'calc(90% - ' + (dialogHeaderEl.offsetHeight + footerHeight) + 'px)'
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dragDom.querySelector('.el-dialog__body').style.height =
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'calc(90% - ' + (dialogHeaderEl.offsetHeight + footerHeight) + 'px)'
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/* dragDom.querySelector('.el-dialog__body').style.height =
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window.innerHeight*0.9
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- (dialogHeaderEl.offsetHeight + footerHeight) + 'px'*/
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hasSetBodyHight = true
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}
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}
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el.dispatchEvent(resizeEvent)
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}
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// 点击放大缩小效果
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maxMin.onclick = setMaxMin
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// 双击头部效果
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dialogHeaderEl.ondblclick = setMaxMin
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// 拉伸
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const resizeEl = document.createElement('div')
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dragDom.appendChild(resizeEl)
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// 在弹窗右下角加上一个10-10px的控制块
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resizeEl.style.cursor = 'se-resize'
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resizeEl.style.position = 'absolute'
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resizeEl.style.height = '10px'
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resizeEl.style.width = '10px'
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resizeEl.style.right = '0px'
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resizeEl.style.bottom = '0px'
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resizeEl.style.zIndex = '99';
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// 鼠标拉伸弹窗
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resizeEl.onmousedown = (e) => {
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// 记录初始x位置
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const clientX = e.clientX
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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 - resizeEl.offsetLeft
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const disY = e.clientY - resizeEl.offsetTop
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document.onmousemove = function (e) {
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e.preventDefault() // 移动时禁用默认事件
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// 通过事件委托，计算移动的距离
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const x = e.clientX - disX + (e.clientX - clientX)// 这里 由于elementUI的dialog控制居中的，所以水平拉伸效果是双倍
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const y = e.clientY - disY
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// 比较是否小于最小宽高
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dragDom.style.width = x > minWidth ? `${x}px` : minWidth + 'px'
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dragDom.style.height = y > minHeight ? `${y}px` : minHeight + 'px'
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if (!hasSetBodyHight) {
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const footerHeight = dragDom.querySelector('.el-dialog__footer') && dragDom.querySelector('.el-dialog__footer').offsetHeight
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dragDom.querySelector('.el-dialog__body').style.height = 'calc(90% - ' + (dialogHeaderEl.offsetHeight + footerHeight) + 'px)'
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hasSetBodyHight = true
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}
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}
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// 拉伸结束
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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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el.dispatchEvent(resizeEvent)
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}
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}
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}
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}
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