完美的el-dialog的拖拽,双击头部全屏,拉宽,拉高等功能的指令
Posted 浪迹天涯小king
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1、使用网上el-dialog的拖拽拉宽指令,存在如下问题
1.1使用指令后el-table的头部的可伸缩时的鼠标样式会消失
1.2使用指令后el-dialog的内容不能文本复制了(这个影响最大)
2、解决办法:经过本人研究,特定组合了指令方~~~~法完美地解决了el-dialog的拖拽,双击头部放大,拉宽拉高等功能,而且没有后遗症(el-dialog的内容不能文本复制,el-table的头部拉宽时的鼠标样式会显示问题)
/*
* 定义公共js里,在入口文件main.js中import;
* 给elementUI的dialog上加上 v-dialogDrag 指令就可以实现弹窗的全屏和拉伸了。
*/
// v-dialogDrag: 弹窗拖拽+水平方向伸缩
Vue.directive(\'dialogDrag\', {
bind(el, binding, vnode, oldVnode) {
//弹框可拉伸最小宽高
let minWidth = 400;
let minHeight = 300;
//初始非全屏
let isFullScreen = false;
//当前宽高
let nowWidth = 0;
let nowHight = 0;
//当前顶部高度
let nowMarginTop = 0;
//获取弹框头部(这部分可双击全屏)
const dialogHeaderEl = el.querySelector(\'.el-dialog__header\');
//弹窗
const dragDom = el.querySelector(\'.el-dialog\');
//给弹窗加上overflow auto;不然缩小时框内的标签可能超出dialog;
dragDom.style.overflow = "auto";
//清除选择头部文字效果
dialogHeaderEl.onselectstart = new Function("return false");
//头部加上可拖动cursor
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);
const sty = dragDom.currentStyle || window.getComputedStyle(dragDom, null);
let moveDown = (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;
// 获取到的值带px 正则匹配替换
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
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) {
// 通过事件委托,计算移动的距离
const l = e.clientX - disX;
const t = e.clientY - disY;
// 移动当前元素
dragDom.style.left = `${l + styL}px`;
dragDom.style.top = `${t + styT}px`;
//将此时的位置传出去
//binding.value({x:e.pageX,y:e.pageY})
};
document.onmouseup = function (e) {
document.onmousemove = null;
document.onmouseup = null;
};
}
dialogHeaderEl.onmousedown = moveDown;
//双击头部效果
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)
let resizeEl=document.createElement("div");
dragDom.appendChild(resizeEl);
//在弹窗右下角加上一个10-10px的控制块
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\';
//鼠标拉伸弹窗
resizeEl.onmousedown = (e) => {
// 记录初始x位置
let clientX = e.clientX;
// 鼠标按下,计算当前元素距离可视区的距离
let disX = e.clientX - resizeEl.offsetLeft;
let disY = e.clientY - resizeEl.offsetTop;
document.onmousemove = function (e) {
e.preventDefault(); // 移动时禁用默认事件
// 通过事件委托,计算移动的距离
let x = e.clientX - disX + (e.clientX - clientX);//这里 由于elementUI的dialog控制居中的,所以水平拉伸效果是双倍
let y = e.clientY - disY;
//比较是否小于最小宽高
dragDom.style.width = x > minWidth ? `${x}px` : minWidth + \'px\';
dragDom.style.height = y > minHeight ? `${y}px` : minHeight + \'px\';
};
//拉伸结束
document.onmouseup = function (e) {
document.onmousemove = null;
document.onmouseup = null;
};
}
//拉伸(右边)
let resizeElR=document.createElement("div");
dragDom.appendChild(resizeElR);
//在弹窗右下角加上一个10-10px的控制块
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\';
//鼠标拉伸弹窗
resizeElR.onmousedown = (e) => {
let elW = dragDom.clientWidth;
let EloffsetLeft = dragDom.offsetLeft;
// 记录初始x位置
let clientX = e.clientX;
document.onmousemove = function (e) {
e.preventDefault(); // 移动时禁用默认事件
//右侧鼠标拖拽位置
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\';
}
}
};
//拉伸结束
document.onmouseup = function (e) {
document.onmousemove = null;
document.onmouseup = null;
};
}
//拉伸(左边)
let resizeElL=document.createElement("div");
dragDom.appendChild(resizeElL);
//在弹窗右下角加上一个10-10px的控制块
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\';
//鼠标拉伸弹窗
resizeElL.onmousedown = (e) => {
let elW = dragDom.clientWidth;
let EloffsetLeft = dragDom.offsetLeft;
// 记录初始x位置
let clientX = e.clientX;
document.onmousemove = function (e) {
e.preventDefault(); // 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\';
}
}
}
};
//拉伸结束
document.onmouseup = function (e) {
document.onmousemove = null;
document.onmouseup = null;
};
}
// 拉伸(下边)
let resizeElB=document.createElement("div");
dragDom.appendChild(resizeElB);
//在弹窗右下角加上一个10-10px的控制块
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\';
//鼠标拉伸弹窗
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(); // 移动时禁用默认事件
//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) {
} 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\';
}
}
};
//拉伸结束
document.onmouseup = function (e) {
document.onmousemove = null;
document.onmouseup = null;
};
}
}
})
/**
* 注意:如果是el-dialog弹出的表单el-form,最好不要把提交按钮当做el-form-item(elementUI文档是这么用的),放在el-dialog里。
* 不然按钮会同el-dialog中标签一样被overflow;
*/
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