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82 lines
2.9 KiB
82 lines
2.9 KiB
export default {
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bind(el, bind, vnode) {
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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.setProperty('cursor', 'move')
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dialogHeaderEl.addEventListener('mousedown', 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 dragDomWidth = dragDom.offsetWidth
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const dragDomHeight = dragDom.offsetHeight
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const screenWidth = document.body.clientWidth
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const screenHeight = document.body.clientHeight
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const minDragDomLeft = dragDom.offsetLeft
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const maxDragDomLeft = screenWidth - minDragDomLeft - dragDomWidth
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const minDragDomTop = dragDom.offsetTop
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const maxDragDomTop = screenHeight - minDragDomTop - dragDomHeight
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// 获取到的值带px 正则匹配替换
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let {left: styL, top: styT} = window.getComputedStyle(dragDom)
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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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}
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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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function onMousemove(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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}
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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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}
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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.setProperty('left', `${left + styL}px`)
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dragDom.style.setProperty('top', `${top + styT}px`)
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}
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function onMouseup() {
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window.removeEventListener('mousemove', onMousemove)
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window.removeEventListener('mouseup', onMouseup)
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}
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window.addEventListener('mousemove', onMousemove)
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window.addEventListener('mouseup', onMouseup)
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})
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function resetStyle() {
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dragDom.style.removeProperty('left')
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dragDom.style.removeProperty('top')
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}
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//当dialog关闭时恢复原位
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vnode.componentInstance.$on('closed', resetStyle)
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vnode.componentInstance.$once('hook:beforeDestroy', () => {
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vnode.componentInstance.$off('closed', resetStyle)
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})
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}
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}
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