/// <summary>
/// Tunes the middle dock item or the data visualizer.
/// </summary>
private void TuneMiddleDockItem()
{
// Attach the comboBox first.
vbMiddle.PackStart(comboBox, false, false, 0);
ScrolledWindow scroll = new ScrolledWindow();
// Attach the treeView to the scroll bar.
scroll.AddWithViewport(treeView);
// Attach the scrollBar to the box.
vbMiddle.PackStart(scroll, true, true, 0);
// Set up DrawingArea.
drawingArea = new DrawingArea();
drawingArea.SetSizeRequest(800, 500);
ScrolledWindow scrollDA = new ScrolledWindow();
Gtk.VBox vBoxDA = new Gtk.VBox();
Viewport viewPortDA = new Viewport();
viewPortDA.Add(drawingArea);
scrollDA.Add(viewPortDA);
vBoxDA.PackStart(scrollDA, true, true, 0);
// Add Paned container in order to make the two boxes resizable
Gtk.VPaned splitter = new Gtk.VPaned();
splitter.Pack1(vBoxDA, true, true);
splitter.Pack2(vbMiddle, true, true);
splitter.Position = 400;
splitter.ShowAll();
nbMiddleDock.AppendPage(splitter, new Gtk.Label("Schema Visualizer"));
nbMiddleDock.ShowAll();
schemaV = new SchemaVisualizer(drawingArea);
// Get the selected shape.
SelectionModel selectionModel = schemaV.Selection;
selectionModel.ModelChanged += HandleSelectionModelChanged;
}
