support multi drag (#3068)

Co-authored-by: linhaojie <linhaojie@lizhi.fm>
Co-authored-by: bao liang <29528966+lenboo@users.noreply.github.com>
Co-authored-by: dailidong <dailidong66@gmail.com>

dolphinscheduler-ui/src/js/conf/home/pages/dag/_source/plugIn/jsPlumbHandle.js

@@ -34,6 +34,7 @@ import {
   rtTargetarrArr
 } from './util'
 import mStart from '@/conf/home/pages/projects/pages/definition/pages/list/_source/start'
+import multiDrag from './multiDrag'
 
 const JSP = function () {
   this.dag = {}
@@ -91,6 +92,9 @@ JSP.prototype.init = function ({ dag, instance, options }) {
   if (this.config.isNewNodes) {
     DragZoom.init()
   }
+
+  // support multi drag
+  multiDrag()
 }
 
 /**

dolphinscheduler-ui/src/js/conf/home/pages/dag/_source/plugIn/multiDrag.js

@@ -0,0 +1,67 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+import JSP from './jsPlumbHandle'
+/**
+ * when and only ctrl or meta key pressing, we can select one or more dags to drag
+ */
+export default function () {
+  // init
+  let selectableObjects = []
+  JSP.JspInstance.clearDragSelection()
+  let ctrlPress = false
+
+  let nodes = null
+  const $window = $(window)
+
+  $window.bind('keydown', function (event) {
+    if (event.ctrlKey || event.metaKey) {
+      if (nodes) {
+        nodes.unbind('mousedown', select)
+      }
+      nodes = $('.jtk-draggable')
+      nodes.bind('mousedown', select)
+      ctrlPress = true
+    }
+  })
+  $window.bind('keyup', function (event) {
+    clear()
+  })
+
+  function select (event) {
+    if (ctrlPress && event.button === 0) {
+      let index = null
+      if ((index = selectableObjects.indexOf(this)) !== -1) {
+        selectableObjects.splice(index, 1)
+        JSP.JspInstance.removeFromDragSelection(this)
+        $(this).css('border-color', '')
+      } else {
+        selectableObjects.push(this)
+        JSP.JspInstance.addToDragSelection(this)
+        $(this).css('border-color', '#4af')
+      }
+    }
+  }
+
+  function clear () {
+    ctrlPress = false
+    selectableObjects.map(item => {
+      $(item).css('border-color', '')
+    })
+    selectableObjects = []
+    JSP.JspInstance.clearDragSelection()
+  }
+}