87 lines
3.4 KiB
JavaScript
87 lines
3.4 KiB
JavaScript
import Vue from 'vue';
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/**
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* 1. 在调用的时候必须写v-
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* 2. 在使用的组件上或者div的位置必须是绝对的，在需要拖拽的最外层样式上加上 position: absolute;
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* 3. 在所需要的样式上使用 v-drag
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* 4. 激活之后的样式名为 v-drag-active 没有激活的样式名为 v-drag-inactive
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*/
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const drag = Vue.directive('drag', {
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// 指令绑定到元素上回立刻执行bind函数，只执行一次
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bind: function (el) {
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},
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//inserted表示一个元素，插入到DOM中会执行inserted函数，只触发一次
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inserted: function (el) {
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let wMax = document.documentElement.clientWidth - el.offsetWidth;
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let hMax = document.documentElement.clientHeight - el.offsetHeight;
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if ("ontouchstart" in window) { // 移动端
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el.ontouchstart = function (e) {
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let time1 = new Date().getTime();
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let x = e.touches[0].pageX - el.offsetLeft;
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let y = e.touches[0].pageY - el.offsetTop;
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// 抑制浏览器端默认拖拽行为，移动端是拖拽屏幕，pc端无
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// e.preventDefault(); 开启后点击 子集点击事件事件会无效
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document.ontouchmove = function (e) {
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let time2 = new Date().getTime();
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if (time2 - time1 > 300) {
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el.classList.remove('v-drag-inactive')
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el.classList.add('v-drag-active')
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}
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let left = e.touches[0].pageX - x;
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let top = e.touches[0].pageY - y;
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if (left < 0) left = 0;
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else if (left > wMax) left = wMax;
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if (top < 0) top = 0;
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else if (top > hMax) top = hMax;
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el.style.left = left + 'px';
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el.style.top = top + 'px';
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}
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document.ontouchend = function () {
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let time2 = new Date().getTime();
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if (time2 - time1 > 300) {
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el.classList.remove('v-drag-active')
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el.classList.add('v-drag-inactive')
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}
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document.ontouchmove = document.ontouchend = null;
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}
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}
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} else { // pc端
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el.onmousedown = function (e) {
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let time1 = new Date().getTime();
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let x = e.pageX - el.offsetLeft;
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let y = e.pageY - el.offsetTop;
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document.onmousemove = function (e) {
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let time2 = new Date().getTime();
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if (time2 - time1 > 300) {
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el.classList.remove('v-drag-inactive')
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el.classList.add('v-drag-active')
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}
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el.style.left = e.pageX - x + 'px';
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el.style.top = e.pageY - y + 'px';
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}
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document.onmouseup = function () {
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let time2 = new Date().getTime();
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if (time2 - time1 > 300) {
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el.classList.remove('v-drag-active')
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el.classList.add('v-drag-inactive')
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}
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document.onmousemove = document.onmouseup = null;
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}
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}
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}
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},
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updated: function (el) {
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}
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})
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export default drag;
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