- 完美版:
可以实现拖拽移动位置，水平垂直缩放，对角线缩放 ,禁止拖出屏幕
yyds!
- 关注点赞使用哟，持续更新前端好文~
【src\utils\directives.js】
// v-dialog-drag-and-zoom: 弹窗拖拽+水平垂直对角线方向伸缩
Vue.directive('dialogDragAndZoom', {
bind(el, binding, vnode, oldVnode) {
//弹框可拉伸最小宽高
let minWidth = 250;
let minHeight = 200;
//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, '');
}
const bodyWidth = document.body.clientWidth
const bodyHeight = document.body.clientHeight // 获取屏幕高度
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;
// console.log("鼠标移动到的位置",e.clientX, e.clientY)
// 限制不让拖出屏幕 *****
if(e.clientY<20 || e.clientY > bodyHeight -100){
return
}
if(e.clientX<100 || e.clientX > bodyWidth -100){
return
}
// 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;
// 底部可以拖动 start
const dialogFooterEl = el.querySelector('.el-dialog__footer');
let moveDownFoot = (e) => {
// 鼠标按下，计算当前元素距离可视区的距离
const disX = e.clientX - dialogFooterEl.offsetLeft;
const disY = e.clientY - dialogFooterEl.offsetTop;
let height = document.getElementsByClassName("summaryDialog")[0].getElementsByClassName('el-dialog')[0].offsetHeight
// console.log("99999小结height",height)
const height2 = height -56
// 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, '');
}
const bodyWidth = document.body.clientWidth
const bodyHeight = document.body.clientHeight // 获取屏幕高度
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;
// 限制不让拖出屏幕 *****
if(e.clientY<100 || e.clientY > bodyHeight -20){
return
}
if(e.clientX<100 || e.clientX > bodyWidth -100){
return
}
// 移动当前元素
dragDom.style.left = `${l + styL}px`;
dragDom.style.top = `${t + styT -height2 }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;
};
}
// dialogFooterEl.style.cursor = 'move';
// dialogFooterEl.onmousedown = moveDownFoot;
// 底部可以拖动 end
//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(左下方)
let resizeElLeft=document.createElement("div");
dragDom.appendChild(resizeElLeft);
//在弹窗右下角加上一个10-10px的控制块
resizeElLeft.style.cursor = 'sw-resize';
resizeElLeft.style.position = 'absolute';
resizeElLeft.style.height = '10px';
resizeElLeft.style.width = '10px';
resizeElLeft.style.left = '0px';
resizeElLeft.style.bottom = '0px';
resizeElLeft.style.zIndex = '99';
//鼠标拉伸弹窗
resizeElLeft.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 = dragDom.clientWidth; // 鼠标按下 记录元素的宽
let disY = e.clientY - resizeElLeft.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 = disX + (clientX - e.clientX)*2;//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) {
console.log(111)
} 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) {
console.log(222)
} 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) {
console.log(333)
} 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;
};
}
}
})
【main.js】
import '@/utils/directives'; // 弹窗拖拽
【使用】
<el-dialog
v-dialog-drag >
弹窗只带拖拽，不带缩放功能
// directives.js
import Vue from 'vue';
// v-dialogDrag: 弹窗拖拽
Vue.directive('dialogDrag', {
bind: function(el, binding, vnode) {
const dialogHeaderEl = el.querySelector('.el-dialog__header')
const dragDom = el.querySelector('.el-dialog')
dialogHeaderEl.style.cssText += ';cursor:move;'
dragDom.style.cssText += ';top:0px;'
// 获取原有属性 ie dom元素.currentStyle 火狐谷歌 window.getComputedStyle(dom元素, null);
const getStyle = (function() {
if (window.document.currentStyle) {
return (dom, attr) => dom.currentStyle[attr]
} else {
return (dom, attr) => getComputedStyle(dom, false)[attr]
}
})()
dialogHeaderEl.onmousedown = (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
const dragDomWidth = dragDom.offsetWidth
const dragDomheight = dragDom.offsetHeight
const screenWidth = document.body.clientWidth
const screenHeight = document.body.clientHeight
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 = getStyle(dragDom, 'left')
let styT = getStyle(dragDom, 'top')
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;`
// emit onDrag event
vnode&&vnode.child.$emit('dragDialog')
}
document.onmouseup = function() {
document.onmousemove = null
document.onmouseup = null
}
}
}
});
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