import Vue from "vue";
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// 自定义元素实现弹框拖拽[重点]
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Vue.directive("draw", {
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inserted: function (el, binding, vNode) {
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el.setAttribute("style", "position: fixed; z-index: 9999");
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},
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bind: function (el, bindding, vNode) {
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el.setAttribute("draggable", true);
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let left, top, width, height;
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el._dragstart = function (event) {
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event.stopPropagation();
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left = event.clientX - el.offsetLeft;
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top = event.clientY - el.offsetTop;
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width = el.offsetWidth;
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height = el.offsetHeight;
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};
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el._checkPosition = function () {
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// 防止被拖出边界
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const width = el.offsetWidth;
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const height = el.offsetHeight;
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let left = Math.min(el.offsetLeft, document.body.clientWidth - width);
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left = Math.max(0, left);
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let top = Math.min(el.offsetTop, document.body.clientHeight - height);
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top = Math.max(0, top);
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el.style.left = left + "px";
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el.style.top = top + "px";
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el.style.width = width + "px";
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el.style.height = height + "px";
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};
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el._dragEnd = function (event) {
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event.stopPropagation();
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left = event.clientX - left;
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top = event.clientY - top;
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el.style.left = left + "px";
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el.style.top = top + "px";
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el.style.width = width + "px";
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el.style.height = height + "px";
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el._checkPosition();
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};
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el._documentAllowDraop = function (event) {
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event.preventDefault();
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};
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document.body.addEventListener("dragover", el._documentAllowDraop);
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el.addEventListener("dragstart", el._dragstart);
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el.addEventListener("dragend", el._dragEnd);
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window.addEventListener("resize", el._checkPosition);
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},
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unbind: function (el, bindding, vNode) {
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document.body.removeEventListener("dragover", el._documentAllowDraop);
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el.removeEventListener("dragstart", el._dragstart);
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el.removeEventListener("dragend", el._dragEnd);
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window.removeEventListener("resize", el._checkPosition);
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delete el._documentAllowDraop;
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delete el._dragstart;
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delete el._dragEnd;
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delete el._checkPosition;
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},
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});
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// v-dialogDrag: 弹窗拖拽
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Vue.directive("dialogDrag", {
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bind(el, binding, vnode, oldVnode) {
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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.cursor = "move"; // 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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dialogHeaderEl.onmousedown = (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; // 获取到的值带px 正则匹配替换
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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
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if (sty.left.includes("%")) {
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styL =
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+document.body.clientWidth * (+sty.left.replace(/\%/g, "") / 100);
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styT =
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+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; // 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`; // 将此时的位置传出去 // 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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},
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});
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// v-dialogDragWidth: 弹窗宽度拖大 拖小
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Vue.directive("dialogDragWidth", {
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bind(el, binding, vnode, oldVnode) {
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const dragDom = binding.value.$el.querySelector(".el-dialog");
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el.onmousedown = (e) => {
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// 鼠标按下，计算当前元素距离可视区的距离
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const disX = e.clientX - el.offsetLeft;
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document.onmousemove = function (e) {
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e.preventDefault(); // 移动时禁用默认事件 // 通过事件委托，计算移动的距离
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const l = e.clientX - disX;
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dragDom.style.width = `${l}px`;
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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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},
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});
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