attach vtk context to gcompose

app/gcompose/src/MainPanel.h

@@ -9,6 +9,9 @@ class ContextPanel;
 
 namespace uLib {
     class ObjectsContext;
+    namespace Vtk {
+        class vtkObjectsContext;
+    }
 }
 
 class MainPanel : public QWidget {
@@ -25,11 +28,15 @@ private slots:
     void onSave();
     void onDarkTheme();
     void onBrightTheme();
+    
+    void onCreateObject(const std::string& className);
 
 private:
     QSplitter* m_rootSplitter;
     ViewportPane* m_firstPane;
     ContextPanel* m_contextPanel;
+    uLib::ObjectsContext* m_context;
+    uLib::Vtk::vtkObjectsContext* m_mainVtkContext;
 };
 
 #endif // MAINPANEL_H