- // v-dialogDrag: 弹窗拖拽属性
-
- export default {
- // 指令的定义
- mounted(el, binding, vnode, oldVnode) {
- const dialogHeaderEl = el.querySelector(".el-dialog__header");
- const dragDom = el.querySelector(".el-dialog");
- //dialogHeaderEl.style.cursor = 'move';
- dialogHeaderEl.style.cssText += ";cursor:move;";
- dragDom.style.cssText += ";top:0px;";
-
- // 获取原有属性 ie dom元素.currentStyle 火狐谷歌 window.getComputedStyle(dom元素, null);
- const sty = (function () {
- if (window.document.currentStyle) {
- return (dom, attr) => dom.currentStyle[attr];
- } else {
- return (dom, attr) => getComputedStyle(dom, false)[attr];
- }
- })();
-
- dialogHeaderEl.onmousedown = (e) => {
- // 鼠标按下,计算当前元素距离可视区的距离
- const disX = e.clientX - dialogHeaderEl.offsetLeft;
- const disY = e.clientY - dialogHeaderEl.offsetTop;
-
- const screenWidth = document.body.clientWidth; // body当前宽度
- 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)
-
- const dragDomWidth = dragDom.offsetWidth; // 对话框宽度
- const dragDomheight = dragDom.offsetHeight; // 对话框高度
-
- const minDragDomLeft = dragDom.offsetLeft;
- const maxDragDomLeft = screenWidth - dragDom.offsetLeft - dragDomWidth;
-
- const minDragDomTop = dragDom.offsetTop;
- const maxDragDomTop = screenHeight - dragDom.offsetTop - dragDomheight;
-
- // 获取到的值带px 正则匹配替换
- let styL = sty(dragDom, "left");
- let styT = sty(dragDom, "top");
-
- // 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 (styL.includes("%")) {
- styL = +document.body.clientWidth * (+styL.replace(/\%/g, "") / 100);
- styT = +document.body.clientHeight * (+styT.replace(/\%/g, "") / 100);
- } else {
- styL = +styL.replace(/\px/g, "");
- styT = +styT.replace(/\px/g, "");
- }
-
- document.onmousemove = function (e) {
- // 通过事件委托,计算移动的距离
- let left = e.clientX - disX;
- let top = e.clientY - disY;
-
- // 边界处理
- if (-left > minDragDomLeft) {
- left = -minDragDomLeft;
- } else if (left > maxDragDomLeft) {
- left = maxDragDomLeft;
- }
-
- if (-top > minDragDomTop) {
- top = -minDragDomTop;
- } else if (top > maxDragDomTop) {
- top = maxDragDomTop;
- }
-
- // 移动当前元素
- dragDom.style.cssText += `;left:${left + styL}px;top:${top + styT}px;`;
- };
-
- document.onmouseup = function (e) {
- document.onmousemove = null;
- document.onmouseup = null;
- };
- };
- },
- };