feature: add drag dialog (#477)

src/directive/el-dragDialog/drag.js

+export default{
+  bind(el, binding) {
+    const dialogHeaderEl = el.querySelector('.el-dialog__header')
+    const dragDom = el.querySelector('.el-dialog')
+    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)
+
+    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
+
+      // 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
+      }
+    }
+  }
+}

src/directive/el-dragDialog/index.js

+import drag from './drag'
+
+const install = function(Vue) {
+  Vue.directive('el-drag-dialog', drag)
+}
+
+if (window.Vue) {
+  window['el-drag-dialog'] = drag
+  Vue.use(install); // eslint-disable-line
+}
+
+drag.install = install
+export default drag

src/lang/en.js

@@ -18,6 +18,7 @@ export default {
     countTo: 'CountTo',
     componentMixin: 'Mixin',
     backToTop: 'BackToTop',
+    dragDialog: 'Drag Dialog',
     charts: 'Charts',
     keyboardChart: 'Keyboard Chart',
     lineChart: 'Line Chart',

src/lang/zh.js

@@ -18,6 +18,7 @@ export default {
     countTo: 'CountTo',
     componentMixin: '小组件',
     backToTop: '返回顶部',
+    dragDialog: '拖拽 Dialog',
     charts: '图表',
     keyboardChart: '键盘图表',
     lineChart: '折线图',

src/router/index.js

@@ -111,7 +111,8 @@ export const asyncRouterMap = [
       { path: 'sticky', component: _import('components-demo/sticky'), name: 'sticky-demo', meta: { title: 'sticky' }},
       { path: 'count-to', component: _import('components-demo/countTo'), name: 'countTo-demo', meta: { title: 'countTo' }},
       { path: 'mixin', component: _import('components-demo/mixin'), name: 'componentMixin-demo', meta: { title: 'componentMixin' }},
-      { path: 'back-to-top', component: _import('components-demo/backToTop'), name: 'backToTop-demo', meta: { title: 'backToTop' }}
+      { path: 'back-to-top', component: _import('components-demo/backToTop'), name: 'backToTop-demo', meta: { title: 'backToTop' }},
+      { path: 'drag-dialog', component: _import('components-demo/dragDialog'), name: 'dragDialog-demo', meta: { title: 'dragDialog' }}
     ]
   },
 

src/views/components-demo/dragDialog.vue

+<template>
+  <div class="components-container">
+    <el-button type="primary" @click="dialogTableVisible = true">open a Drag Dialog</el-button>
+    <el-dialog v-el-drag-dialog title="Shipping address" :visible.sync="dialogTableVisible">
+      <el-table :data="gridData">
+        <el-table-column property="date" label="Date" width="150"></el-table-column>
+        <el-table-column property="name" label="Name" width="200"></el-table-column>
+        <el-table-column property="address" label="Address"></el-table-column>
+      </el-table>
+    </el-dialog>
+  </div>
+</template>
+
+<script>
+import elDragDialog from '@/directive/el-dragDialog' // base on element-ui
+
+export default {
+  name: 'dragDialog-demo',
+  directives: { elDragDialog },
+  data() {
+    return {
+      dialogTableVisible: false,
+      gridData: [{
+        date: '2016-05-02',
+        name: 'John Smith',
+        address: 'No.1518,  Jinshajiang Road, Putuo District'
+      }, {
+        date: '2016-05-04',
+        name: 'John Smith',
+        address: 'No.1518,  Jinshajiang Road, Putuo District'
+      }, {
+        date: '2016-05-01',
+        name: 'John Smith',
+        address: 'No.1518,  Jinshajiang Road, Putuo District'
+      }, {
+        date: '2016-05-03',
+        name: 'John Smith',
+        address: 'No.1518,  Jinshajiang Road, Putuo District'
+      }]
+    }
+  }
+}
+</script>