vue.js javascript 前端 typescript anti-design-vue Vue3 + Ant Design Vue Modal 对话框拖拽+缩放指令

2、ts部分

说明：modal默认挂载到body下，getContainer  函数是为了让modal挂载到父盒子modalBox下，不然指令中 el 获取不到modal的DOM节点

const visible = ref(false);

const getContainer = () => {

return document.getElementById("modalBox");

};

3、指令代码部分

3.1 index.ts文件

import dialogDrag from "./modules/dialogDrag"

// 统一入口

export default function directive(app: any) {

app.directive('dialogDrag', dialogDrag)

}

3.2 dialogDrag.ts (核心代码)

说明：必须使用 nextTick 不然获取DOM元素会为空

import { nextTick } from "vue";

export default {

mounted(el: any, binding?: any) {

nextTick(() => {

const minWidth = 400;

const minHeight = 300;

// 自定义属性，判断是否可拖拽

const dialogHeaderEl = el.querySelector('.xz-modal-header')

const dragDom = el.querySelector('.xz-modal')

const dragDomBody = el.querySelector('.xz-modal-body') // 获取body antd 必须插入此DOM元素下

// dragDom.style.position='relative'

dialogHeaderEl.style.cssText += ';cursor:move;'

// 是否开启左右拖拽功能

if (binding.value) {

// 此部分的样式为单独编写 根据自己需求

const leftDiv = document.createElement("div");

leftDiv.id = 'leftdiv'

leftDiv.onmousedown = (e: any) => {

Drag(e)

}

dragDomBody.appendChild(leftDiv)

const rightDiv = document.createElement("div");

rightDiv.id = 'rightdiv'

rightDiv.onmousedown = (e: any) => {

Drag(e)

}

dragDomBody.appendChild(rightDiv)

const bottomtDiv = document.createElement("div");

bottomtDiv.id = 'bottomtdiv'

bottomtDiv.onmousedown = (e: any) => {

Drag(e)

}

dragDomBody.appendChild(bottomtDiv)

}

// dragDom.style.cssText += ';bottom:0px;'

// 获取原有属性 火狐谷歌 window.getComputedStyle(dom元素, null);

const sty = (function () {

return (dom: any, attr: any) => getComputedStyle(dom, null)[attr]

})()

// 拖拉函数

function Drag(ev: any) {

// dragDom.style.userSelect = 'none';

const clientX = ev.clientX;

const clientY = ev.clientY;

const elW = dragDom.clientWidth;

const elH = dragDom.clientHeight;

const EloffsetLeft = dragDom.offsetLeft;

const EloffsetTop = dragDom.offsetTop;

dragDom.style.userSelect = 'none'; // 禁止内容被选中

const ELscrollTop = el.scrollTop;

document.onmousemove = function (e) {

const modalContent = el.querySelector('.modal')

console.log('modalContent',modalContent);

e.stopPropagation(); // 移动时禁用默认事件

// 左侧鼠标拖拽位置

if (clientX > EloffsetLeft && clientX < EloffsetLeft + 10) {

// 往左拖拽

if (clientX > e.clientX) {

dragDom.style.width = elW + (clientX - e.clientX) * 2 + 'px';

}

// 往右拖拽

if (clientX < e.clientX) {

if (dragDom.clientWidth < minWidth) {

} else {

dragDom.style.width = elW - (e.clientX - clientX) * 2 + 'px';

}

}

}

// 右侧鼠标拖拽位置

if (clientX > EloffsetLeft + elW - 10 && clientX < EloffsetLeft + elW) {

// 往左拖拽

if (clientX > e.clientX) {

// eslint-disable-next-line no-empty

if (dragDom.clientWidth < minWidth) {

} else {

dragDom.style.width = elW - (clientX - e.clientX) * 2 + 'px';

}

}

// 往右拖拽

if (clientX < e.clientX) {

dragDom.style.width = elW + (e.clientX - clientX) * 2 + 'px';

}

}

// 底部鼠标拖拽位置

if (ELscrollTop + clientY > EloffsetTop + elH - 20 && ELscrollTop + clientY < EloffsetTop + elH) {

// 往上拖拽

if (clientY > e.clientY) {

if (dragDom.clientHeight >= minHeight) {

dragDom.style.height = elH - (clientY - e.clientY) * 2 + 'px';

modalContent.style.maxHeight = elH - (clientY - e.clientY) * 2 - 100 + 'px'

}

}

// 往下拖拽

if (clientY < e.clientY) {

dragDom.style.height = elH + (e.clientY - clientY) * 2 + 'px';

modalContent.style.maxHeight = elH + (e.clientY - clientY) * 2 - 100 + 'px'

}

}

};

// 拉伸结束

document.onmouseup = function (e) {

document.onmousemove = null;

document.onmouseup = null;

};

}

// 头部移动

dialogHeaderEl.onmousedown = (e: any) => {

// 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: any = sty(dragDom, 'left')

// 为兼容ie

if (styL === 'auto') styL = '0px'

let styT: any = sty(dragDom, 'top')

// console.log(styL)

// 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: any) {

document.onmousemove = null

document.onmouseup = null

}

return false

}

})

}

}

main.ts中引入 全局使用

const app = createApp(App);

import App from "./App.vue";

import directive from './common/Directive/index'; // 统一自定义指令入口

directive(app)

参考文章

Vue3 + Ant Design Vue Modal 对话框可拖拽指令_无恙คิดถึง的博客-CSDN博客

Antdesign a-modal自定义指令实现拖拽放大缩小_温柔的风归功于带笑的你的博客-CSDN博客

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