drag.js
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/**
* v-dialogDrag 弹窗拖拽
* Copyright (c) 2019 ruoyi
*/
export default {
bind(el, binding, vnode, oldVnode) {
const value = binding.value
if (value == false) return
// 获取拖拽内容头部
const dialogHeaderEl = el.querySelector('.el-dialog__header');
const dragDom = el.querySelector('.el-dialog');
dialogHeaderEl.style.cursor = 'move';
// 获取原有属性 ie dom元素.currentStyle 火狐谷歌 window.getComputedStyle(dom元素, null);
const sty = dragDom.currentStyle || window.getComputedStyle(dragDom, null);
dragDom.style.position = 'absolute';
dragDom.style.marginTop = 0;
let width = dragDom.style.width;
if (width.includes('%')) {
width = +document.body.clientWidth * (+width.replace(/\%/g, '') / 100);
} else {
width = +width.replace(/\px/g, '');
}
dragDom.style.left = `${(document.body.clientWidth - width) / 2}px`;
// 鼠标按下事件
dialogHeaderEl.onmousedown = (e) => {
// 鼠标按下，计算当前元素距离可视区的距离 (鼠标点击位置距离可视窗口的距离)
const disX = e.clientX - dialogHeaderEl.offsetLeft;
const disY = e.clientY - dialogHeaderEl.offsetTop;
// 获取到的值带px 正则匹配替换
let styL, styT;
// 注意在ie中 第一次获取到的值为组件自带50% 移动之后赋值为px
if (sty.left.includes('%')) {
styL = +document.body.clientWidth * (+sty.left.replace(/\%/g, '') / 100);
styT = +document.body.clientHeight * (+sty.top.replace(/\%/g, '') / 100);
} else {
styL = +sty.left.replace(/\px/g, '');
styT = +sty.top.replace(/\px/g, '');
};
// 鼠标拖拽事件
document.onmousemove = function (e) {
// 通过事件委托，计算移动的距离 （开始拖拽至结束拖拽的距离）
const l = e.clientX - disX;
const t = e.clientY - disY;
let finallyL = l + styL
let finallyT = t + styT
// 移动当前元素
dragDom.style.left = `${finallyL}px`;
dragDom.style.top = `${finallyT}px`;
};
document.onmouseup = function (e) {
document.onmousemove = null;
document.onmouseup = null;
};
}
}
};