zcloud-ui/lib/directives/dialogDrag.js

A Component Library for Vue.js.

'use strict';

var _vue = require('vue');

var _vue2 = _interopRequireDefault(_vue);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

// 需要在对话框中添加 v-dialogDrag
_vue2.default.directive('dialogDrag', {
  bind: function bind(el, binding, vnode, oldVnode) {
    try {
      // 弹框可拉伸最小宽高
      var minWidth = 200;
      var minHeight = 100;
      // 初始非全屏
      var isFullScreen = false;
      // 当前宽高
      var nowWidth = 0;
      var nowHight = 0;
      // 当前顶部高度
      var nowMarginTop = 0;
      // 获取弹框头部（这部分可双击全屏）
      var dialogHeaderEl = el.querySelector('.el-dialog__header');
      // 获取弹框底部
      var dialogFootEl = el.querySelector('.el-dialog__footer');
      // 弹窗
      var dragDom = el.querySelector('.el-dialog');
      dragDom.style.maxHeight = '100VH';

      var headFootHeight = 0;
      var timer = setInterval(function () {
        if (dialogHeaderEl.offsetHeight) {
          headFootHeight = dialogHeaderEl.offsetHeight + dialogFootEl.offsetHeight;
          clearInterval(timer);
        }
      }, 200);

      // 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);
      var sty = dragDom.currentStyle || window.getComputedStyle(dragDom, null);

      var moveDown = function moveDown(e) {
        // 鼠标按下，计算当前元素距离可视区的距离
        var disX = e.clientX - dialogHeaderEl.offsetLeft;
        var disY = e.clientY - dialogHeaderEl.offsetTop;

        // 获取到的值带px 正则匹配替换
        var styL = void 0,
            styT = void 0;

        // 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
          var l = e.clientX - disX;
          var 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)效果不想要可以注释
      dialogHeaderEl.ondblclick = function (e) {
        if (isFullScreen === false) {
          nowHight = dragDom.clientHeight;
          nowWidth = dragDom.clientWidth;
          nowMarginTop = dragDom.style.marginTop;
          dragDom.style.left = 0;
          dragDom.style.top = 0;
          dragDom.querySelector('.el-dialog__body').style.height = 'calc(100VH - ' + headFootHeight + 'px)';
          dragDom.querySelector('.el-dialog__body').style.maxHeight = 'calc(100VH - ' + headFootHeight + 'px)';

          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.querySelector('.el-dialog__body').style.height = 'calc(100% - 300px)';
          dragDom.querySelector('.el-dialog__body').style.maxHeight = 'calc(100VH - 300px)';
          dragDom.style.width = nowWidth + 'px';
          dragDom.style.marginTop = nowMarginTop;
          isFullScreen = false;
          dialogHeaderEl.style.cursor = 'move';
          dialogHeaderEl.onmousedown = moveDown;
        }
      };

      // 拉伸(右下方)效果不想要可以注释
      // 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)效果不想要可以注释
      var 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 = function (e) {
        var elW = dragDom.clientWidth;
        var EloffsetLeft = dragDom.offsetLeft;
        // 记录初始x位置
        var 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) {
                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)效果不想要可以注释
      var 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 = function (e) {
        var elW = dragDom.clientWidth;
        var EloffsetLeft = dragDom.offsetLeft;
        // 记录初始x位置
        var 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) {
                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)效果不想要可以注释
      var 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 = function (e) {
        var EloffsetTop = dragDom.offsetTop;
        var ELscrollTop = el.scrollTop;
        var clientY = e.clientY;
        var 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) {
                dragDom.style.height = elH - (clientY - e.clientY) * 2 + 'px';
                dragDom.querySelector('.el-dialog__body').style.height = 'calc(100% - ' + headFootHeight + 'px)';
              }
            }
            // 往下拖拽
            if (clientY < e.clientY) {
              dragDom.style.height = elH + (e.clientY - clientY) * 2 + 'px';
              dragDom.querySelector('.el-dialog__body').style.height = 'calc(100% - ' + headFootHeight + 'px)';
            }
          }
        };
        // 拉伸结束
        document.onmouseup = function (e) {
          document.onmousemove = null;
          document.onmouseup = null;
        };
      };
    } catch (error) {
      console.log(error);
    }
  }
});
/* eslint-disable */