Element,el-dialog弹出层拖拽及拉伸、双击全屏

￡神魔★判官ぃ 2022-10-02 13:45 229阅读 0赞

![Image 1][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NxbHF1YW4_size_16_color_FFFFFF_t_70][]

复制以下代码就可使用

import Vue from 'vue';
    
    /*
    
    *  使用方法
    
    *  将以下代码复制到一个js文件中，然后在入口文件main.js中import引入即可；
    
    *  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。
    
    *  给dialog设置 :close-on-click-modal="false" , 禁止点击遮罩层关闭弹出层
    
    *  如果是form表单，不要将提交等按钮放置el-form-item，以免在上下拉伸时被隐藏
    
    */
    
    // 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;
    
            //双击头部全屏效果
    
            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;
    
                }
    
            }
    
            dragDom.onmousemove = function (e) {
    
                let moveE = e;
    
                if (e.clientX > dragDom.offsetLeft + dragDom.clientWidth - 10 || dragDom.offsetLeft + 10 > e.clientX) {
    
                    dragDom.style.cursor = 'w-resize';
    
                } else if (el.scrollTop + e.clientY > dragDom.offsetTop + dragDom.clientHeight - 10) {
    
                    dragDom.style.cursor = 's-resize';
    
                } else {
    
                    dragDom.style.cursor = 'default';
    
                    dragDom.onmousedown = null;
    
                }
    
                dragDom.onmousedown = (e) => {
    
                    const clientX = e.clientX;
    
                    const clientY = e.clientY;
    
                    let elW = dragDom.clientWidth;
    
                    let elH = dragDom.clientHeight;
    
                    let EloffsetLeft = dragDom.offsetLeft;
    
                    let EloffsetTop = dragDom.offsetTop;
    
                    dragDom.style.userSelect = 'none';
    
                    let ELscrollTop = el.scrollTop;
    
                    //判断点击的位置是不是为头部
    
                    if (clientX > EloffsetLeft && clientX < EloffsetLeft + elW && clientY > EloffsetTop && clientY < EloffsetTop + 100) {
    
                        //如果是头部在此就不做任何动作，以上有绑定dialogHeaderEl.onmousedown = moveDown;
    
                    }else{
    
                        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';
    
                                    }
    
                                }
    
                            }
    
                            //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';
    
                                }
    
                            }
    
                            //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;
    
                        };
    
                    }
    
                }
    
            }
    
        }
    
    })

原文：[https://www.jianshu.com/p/0daf43364da5][https_www.jianshu.com_p_0daf43364da5]

[Image 1]: /images/20220112/9596cdb218f84e1da251f6722a1f00ef.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NxbHF1YW4_size_16_color_FFFFFF_t_70]: /images/20220112/4f93c1f712594006b73ff4c8781db673.png
[https_www.jianshu.com_p_0daf43364da5]: https://www.jianshu.com/p/0daf43364da5