public ModelDiagramForm(WbContext context, String id)
        {
            InitializeComponent();

              wbContext = context;

              CreateCanvas(id); // Sets formBE.

              canvasViewer.CanvasPanel.MouseMove += new MouseEventHandler(CanvasPanel_MouseMove);
              canvasViewer.CanvasPanel.MouseDown += new MouseEventHandler(CanvasPanel_MouseDown);
              canvasViewer.CanvasPanel.MouseUp += new MouseEventHandler(CanvasPanel_MouseUp);
              canvasViewer.CanvasPanel.MouseDoubleClick += new MouseEventHandler(CanvasPanel_MouseDoubleClick);
              canvasViewer.CanvasPanel.KeyDown += new KeyEventHandler(CanvasPanel_KeyDown);
              canvasViewer.CanvasPanel.KeyUp += new KeyEventHandler(CanvasPanel_KeyUp);
              canvasViewer.CanvasPanel.MouseLeave += new EventHandler(CanvasPanel_MouseLeave);

              // Sidebar windows.
              modelNavigator = new ModelNavigatorForm(this);
              userDatatypesForm = new UserDatatypesForm(wbContext);
              modelLayerForm = new ModelLayerForm(this);
              modelCatalogForm = new ModelCatalogForm(formBE);
              historyForm = new UndoHistoryForm(wbContext);
              modelPropertiesForm = new ModelPropertiesForm(wbContext);
              modelObjectDescriptionForm = new ModelObjectDescriptionForm(wbContext);

              SetupSideBars();

              toolsToolStrip = formBE.get_tools_toolbar();
              toolsToolStrip.Dock = DockStyle.Left;
              diagramPanel.Controls.Add(toolsToolStrip);

              optionsToolStrip = formBE.get_options_toolbar();
              optionsToolStrip.Padding = new Padding(2);
              optionsToolStrip.Dock = DockStyle.None;
              optionsToolStrip.AutoSize = false;
              diagramPanel.Controls.Add(optionsToolStrip);
              diagramPanel.Controls.SetChildIndex(optionsToolStrip, 0);
              optionsToolStrip.Anchor = AnchorStyles.Left | AnchorStyles.Top | AnchorStyles.Right;
              optionsToolStrip.Hide();

              UpdateColors();

              ManagedNotificationCenter.AddObserver(this, "GNFormTitleDidChange");
        }