diff --git a/src/Gui/TaskView/TaskView.cpp b/src/Gui/TaskView/TaskView.cpp
index 45cacd8af..bb7522285 100644
--- a/src/Gui/TaskView/TaskView.cpp
+++ b/src/Gui/TaskView/TaskView.cpp
@@ -23,7 +23,7 @@
 
 #include "PreCompiled.h"
 
-#ifndef _PreComp_
+#ifndef _PreComp_
 # include <boost/bind.hpp>
 # include <QCursor>
 #endif
@@ -191,6 +191,11 @@ void TaskBox::hideGroupBox()
     setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Preferred);
 }
 
+bool TaskBox::isGroupVisible() const
+{
+    return myGroup->isVisible();
+}
+
 void TaskBox::actionEvent (QActionEvent* e)
 {
     QAction *action = e->action();
@@ -246,16 +251,16 @@ TaskView::TaskView(QWidget *parent)
     Gui::Selection().Attach(this);
 
     connectApplicationActiveDocument = 
-    App::GetApplication().signalActiveDocument.connect
+    App::GetApplication().signalActiveDocument.connect
         (boost::bind(&Gui::TaskView::TaskView::slotActiveDocument, this, _1));
     connectApplicationDeleteDocument = 
-    App::GetApplication().signalDeletedDocument.connect
+    App::GetApplication().signalDeletedDocument.connect
         (boost::bind(&Gui::TaskView::TaskView::slotDeletedDocument, this));
     connectApplicationUndoDocument = 
-    App::GetApplication().signalUndoDocument.connect
+    App::GetApplication().signalUndoDocument.connect
         (boost::bind(&Gui::TaskView::TaskView::slotUndoDocument, this, _1));
     connectApplicationRedoDocument = 
-    App::GetApplication().signalRedoDocument.connect
+    App::GetApplication().signalRedoDocument.connect
         (boost::bind(&Gui::TaskView::TaskView::slotRedoDocument, this, _1));
 }
 
diff --git a/src/Gui/TaskView/TaskView.h b/src/Gui/TaskView/TaskView.h
index 72b8100f7..528b011e3 100644
--- a/src/Gui/TaskView/TaskView.h
+++ b/src/Gui/TaskView/TaskView.h
@@ -31,7 +31,7 @@
 
 #include <Gui/iisTaskPanel/include/iisTaskPanel>
 #include <Gui/Selection.h>
-#include "TaskWatcher.h"
+#include "TaskWatcher.h"
 
 namespace App {
 class Property;
@@ -78,6 +78,7 @@ public:
     TaskBox(const QPixmap &icon, const QString &title, bool expandable, QWidget *parent);
     ~TaskBox();
     void hideGroupBox();
+    bool isGroupVisible() const;
 
 protected:
     void showEvent(QShowEvent*);