Closes #1426

Author: dcwhite

src/Interface/Application/ModuleProxyWidget.h

@@ -95,6 +95,7 @@ namespace SCIRun
     static const int CurrentTagKey = 101;
     static const int NoTag = -1;
     static const int AllTags = -50;
+    static const int ClearTags = -77;
     static const int ShowGroups = -100;
     static const int HideGroups = -101;
   }

src/Interface/Application/NetworkEditor.cc

@@ -1323,6 +1323,22 @@ void NetworkEditor::tagLayer(bool active, int tag)
 {
   tagLayerActive_ = active;
 
+  if (active)
+  {
+    auto items = scene_->selectedItems();
+    Q_FOREACH(QGraphicsItem* item, items)
+    {
+      if (item->data(TagDataKey).toInt() == NoTag)
+      {
+        item->setData(TagDataKey, tag);
+      }
+      else if (ClearTags == tag)
+      {
+        item->setData(TagDataKey, NoTag);
+      }
+    }
+  }
+
   Q_FOREACH(QGraphicsItem* item, scene_->items())
   {
     item->setData(TagLayerKey, active);
@@ -1334,7 +1350,7 @@ void NetworkEditor::tagLayer(bool active, int tag)
       {
         highlightTaggedItem(item, itemTag);
       }
-      else if (tag != NoTag)
+      else if (tag != NoTag && tag != ClearTags)
       {
         if (tag == itemTag)
         {

src/Interface/Application/SCIRunMainWindow.cc

@@ -1676,6 +1676,17 @@ void SCIRunMainWindow::keyPressEvent(QKeyEvent *event)
     	}
 		}
 	}
+	else if (event->key() == Qt::Key_J)
+	{
+		if (!actionToggleTagLayer_->isChecked())
+		{
+    	if (networkEditor_->tagLayerActive())
+    	{
+      	networkEditor_->tagLayer(true, ClearTags);
+				showStatusMessage("Tag layer active: selected modules' tags cleared");
+    	}
+	  }
+	}
   else if (event->key() >= Qt::Key_0 && event->key() <= Qt::Key_9)
   {
 		if (!actionToggleTagLayer_->isChecked())