public DockItemContainer (DockFrame frame, DockItem item)
{
this.item = item;
mainBox = new VBox ();
Add (mainBox);
mainBox.ResizeMode = Gtk.ResizeMode.Queue;
mainBox.Spacing = 0;
ShowAll ();
mainBox.PackStart (item.GetToolbar (PositionType.Top).Container, false, false, 0);
HBox hbox = new HBox ();
hbox.Show ();
hbox.PackStart (item.GetToolbar (PositionType.Left).Container, false, false, 0);
contentBox = new HBox ();
contentBox.Show ();
hbox.PackStart (contentBox, true, true, 0);
hbox.PackStart (item.GetToolbar (PositionType.Right).Container, false, false, 0);
mainBox.PackStart (hbox, true, true, 0);
mainBox.PackStart (item.GetToolbar (PositionType.Bottom).Container, false, false, 0);
}