增加delete删除node功能

web/src/components/gva-wfd/behavior/deleteItem.js

 /* eslint-disable */
-export default function(G6){
-  G6.registerBehavior('deleteItem', {
-    getEvents() {
-      return {
-        'keydown': 'onKeydown',
-        'canvas:mouseleave': 'onCanvasLeave',
-        'canvas:mouseenter': 'onCanvasFocus',
-      }
-    },
-    onKeydown(e){
-      const items = this.graph.get('selectedItems');
-      const focus = this.graph.get('focusGraphWrapper');
-      if(e.keyCode === 8 && items && items.length > 0 && focus){
-        if(this.graph.executeCommand) {
-          this.graph.executeCommand('delete', {});
-        }else{
-          this.graph.remove(items[0]);
+export default function(G6) {
+    G6.registerBehavior('deleteItem', {
+        getEvents() {
+            return {
+                'keydown': 'onKeydown',
+                'canvas:mouseleave': 'onCanvasLeave',
+                'canvas:mouseenter': 'onCanvasFocus',
+            }
+        },
+        onKeydown(e) {
+            const items = this.graph.get('selectedItems');
+            const focus = this.graph.get('focusGraphWrapper');
+            if (e.keyCode === 46 && items && items.length > 0 && focus) {
+                if (this.graph.executeCommand) {
+                    this.graph.executeCommand('delete', {});
+                } else {
+                    this.graph.remove(items[0]);
+                }
+                this.graph.set('selectedItems', []);
+                this.graph.emit('afteritemselected', []);
+            }
+        },
+        onCanvasLeave(e) {
+            this.graph.set('focusGraphWrapper', false);
+        },
+        onCanvasFocus() {
+            this.graph.set('focusGraphWrapper', true);
         }
-        this.graph.set('selectedItems',[]);
-        this.graph.emit('afteritemselected',[]);
-      }
-    },
-    onCanvasLeave(e){
-      this.graph.set('focusGraphWrapper',false);
-    },
-    onCanvasFocus(){
-      this.graph.set('focusGraphWrapper',true);
-    }
-  });
-}
+    });
+}
\ No newline at end of file