directive/dialogDrag.js
import Vue from "vue";
Vue.directive('dialogDrag', {
bind(el, binding, vnode, oldVnode) {
//彈框可拉伸最小寬高
let minWidth = 400;
let minHeight = 300;
//初始非全屏
let isFullScreen = false;
//當前寬高
let nowWidth = 0;
let nowHight = 0;
//當前頂部高度
let nowMarginTop = 0;
//獲取彈框頭部（這部分可雙擊全屏）
const dialogHeaderEl = el.querySelector('.el-dialog__header');
//彈窗
const dragDom = el.querySelector('.el-dialog');
//給彈窗加上overflow auto；不然縮小時框內的標籤可能超出dialog；
dragDom.style.overflow = "auto";
//清除選擇頭部文字效果
dialogHeaderEl.onselectstart = new Function("return false");
//頭部加上可拖動cursor
dialogHeaderEl.style.cursor = 'move';
// 獲取原有屬性 ie dom元素.currentStyle 火狐谷歌 window.getComputedStyle(dom元素, null);
const sty = dragDom.currentStyle || window.getComputedStyle(dragDom, null);
let moveDown = (e) => {
// 滑鼠按下，計算當前元素距離可視區的距離
const disX = e.clientX - dialogHeaderEl.offsetLeft;
const disY = e.clientY - dialogHeaderEl.offsetTop;
// 獲取到的值帶px 正則匹配替換
let styL, styT;
// 注意在ie中 第一次獲取到的值為元件自帶50% 移動之後賦值為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, '');
};
document.onmousemove = function (e) {
// 透過事件委託，計算移動的距離
const l = e.clientX - disX;
const t = e.clientY - disY;
// 移動當前元素
dragDom.style.left = `${l + styL}px`;
dragDom.style.top = `${t + styT}px`;
//將此時的位置傳出去
//binding.value({x:e.pageX,y:e.pageY})
};
document.onmouseup = function (e) {
document.onmousemove = null;
document.onmouseup = null;
};
}
dialogHeaderEl.onmousedown = moveDown;
//雙擊(頭部)效果不想要可以註釋
dialogHeaderEl.ondblclick = (e) => {
if (isFullScreen == false) {
nowHight = dragDom.clientHeight;
nowWidth = dragDom.clientWidth;
nowMarginTop = dragDom.style.marginTop;
dragDom.style.left = 0;
dragDom.style.top = 0;
dragDom.style.height = "100VH";
dragDom.style.width = "100VW";
dragDom.style.marginTop = 0;
isFullScreen = true;
dialogHeaderEl.style.cursor = 'initial';
dialogHeaderEl.onmousedown = null;
} else {
dragDom.style.height = "auto";
dragDom.style.width = nowWidth + 'px';
dragDom.style.marginTop = nowMarginTop;
isFullScreen = false;
dialogHeaderEl.style.cursor = 'move';
dialogHeaderEl.onmousedown = moveDown;
}
}
//拉伸(右下方)效果不想要可以註釋
let resizeEl = document.createElement("div");
dragDom.appendChild(resizeEl);
//在彈窗右下角加上一個10-10px的控制塊
resizeEl.style.cursor = 'se-resize';
resizeEl.style.position = 'absolute';
resizeEl.style.height = '10px';
resizeEl.style.width = '10px';
resizeEl.style.right = '0px';
resizeEl.style.bottom = '0px';
resizeEl.style.zIndex = '99';
//滑鼠拉伸彈窗
resizeEl.onmousedown = (e) => {
// 記錄初始x位置
let clientX = e.clientX;
// 滑鼠按下，計算當前元素距離可視區的距離
let disX = e.clientX - resizeEl.offsetLeft;
let disY = e.clientY - resizeEl.offsetTop;
document.onmousemove = function (e) {
e.preventDefault(); // 移動時禁用預設事件
// 透過事件委託，計算移動的距離
let x = e.clientX - disX + (e.clientX - clientX);//這裡 由於elementUI的dialog控制居中的，所以水平拉伸效果是雙倍
let y = e.clientY - disY;
//比較是否小於最小寬高
dragDom.style.width = x > minWidth ? `${x}px` : minWidth + 'px';
dragDom.style.height = y > minHeight ? `${y}px` : minHeight + 'px';
};
//拉伸結束
document.onmouseup = function (e) {
document.onmousemove = null;
document.onmouseup = null;
};
}
//拉伸(右邊)效果不想要可以註釋
let resizeElR = document.createElement("div");
dragDom.appendChild(resizeElR);
//在彈窗右下角加上一個10-10px的控制塊
resizeElR.style.cursor = 'w-resize';
resizeElR.style.position = 'absolute';
resizeElR.style.height = '100%';
resizeElR.style.width = '10px';
resizeElR.style.right = '0px';
resizeElR.style.top = '0px';
//滑鼠拉伸彈窗
resizeElR.onmousedown = (e) => {
let elW = dragDom.clientWidth;
let EloffsetLeft = dragDom.offsetLeft;
// 記錄初始x位置
let clientX = e.clientX;
document.onmousemove = function (e) {
e.preventDefault(); // 移動時禁用預設事件
//右側滑鼠拖拽位置
if (clientX > EloffsetLeft + elW - 10 && clientX < EloffsetLeft + elW) {
//往左拖拽
if (clientX > e.clientX) {
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';
}
}
};
//拉伸結束
document.onmouseup = function (e) {
document.onmousemove = null;
document.onmouseup = null;
};
}
//拉伸(左邊)效果不想要可以註釋
let resizeElL = document.createElement("div");
dragDom.appendChild(resizeElL);
//在彈窗右下角加上一個10-10px的控制塊
resizeElL.style.cursor = 'w-resize';
resizeElL.style.position = 'absolute';
resizeElL.style.height = '100%';
resizeElL.style.width = '10px';
resizeElL.style.left = '0px';
resizeElL.style.top = '0px';
//滑鼠拉伸彈窗
resizeElL.onmousedown = (e) => {
let elW = dragDom.clientWidth;
let EloffsetLeft = dragDom.offsetLeft;
// 記錄初始x位置
let clientX = e.clientX;
document.onmousemove = function (e) {
e.preventDefault(); // 移動時禁用預設事件
//左側滑鼠拖拽位置
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';
}
}
}
};
//拉伸結束
document.onmouseup = function (e) {
document.onmousemove = null;
document.onmouseup = null;
};
}
// 拉伸(下邊)效果不想要可以註釋
let resizeElB = document.createElement("div");
dragDom.appendChild(resizeElB);
//在彈窗右下角加上一個10-10px的控制塊
resizeElB.style.cursor = 'n-resize';
resizeElB.style.position = 'absolute';
resizeElB.style.height = '10px';
resizeElB.style.width = '100%';
resizeElB.style.left = '0px';
resizeElB.style.bottom = '0px';
//滑鼠拉伸彈窗
resizeElB.onmousedown = (e) => {
let EloffsetTop = dragDom.offsetTop;
let ELscrollTop = el.scrollTop;
let clientY = e.clientY;
let elH = dragDom.clientHeight;
document.onmousemove = function (e) {
e.preventDefault(); // 移動時禁用預設事件
//底部滑鼠拖拽位置
if (ELscrollTop + clientY > EloffsetTop + elH - 20 && ELscrollTop + clientY < EloffsetTop + elH) {
//往上拖拽
if (clientY > e.clientY) {
if (dragDom.clientHeight < minHeight) {
} else {
dragDom.style.height = elH - (clientY - e.clientY) * 2 + 'px';
}
}
//往下拖拽
if (clientY < e.clientY) {
dragDom.style.height = elH + (e.clientY - clientY) * 2 + 'px';
}
}
};
//拉伸結束
document.onmouseup = function (e) {
document.onmousemove = null;
document.onmouseup = null;
};
}
}
})
main.js
import dialogDrag from './directive/dialogDrag'
Vue.use(dialogDrag)