private static void UnloadResources(SceneView sceneView)
        {
            List<Otter.UI.Resources.Resource> resources = new List<Otter.UI.Resources.Resource>();

            resources.AddRange(sceneView.Scene.Textures.OfType<Otter.UI.Resources.Resource>());
            resources.AddRange(sceneView.Scene.Sounds.OfType<Otter.UI.Resources.Resource>());

            foreach (Otter.UI.Resources.Resource res in resources)
                res.Unload();
        }
        /// <summary>
        /// Opens a scene for editing
        /// </summary>
        /// <param name="scene"></param>
        private void OpenEntry(GUIProjectEntry entry)
        {
            GUIProjectScene projectScene = entry as GUIProjectScene;
            SceneView sceneView = null;

            // Check to see if the document is already open, and focus
            // on it if so.
            foreach (DockContent doc in mDockPanel.Documents)
            {
                SceneView view = doc as SceneView;
                if (view != null && view.Scene == projectScene.Scene)
                {
                    doc.Show();
                    return;
                }
            }

            // We don't have a sceneview for this scene, create and 
            // add it now.
            if (sceneView == null)
            {
                LoadResources(projectScene);

                sceneView = new SceneView(projectScene.Scene);
                sceneView.TabText = projectScene.Name;

                sceneView.SelectedControlsChanged += new SceneView.ControlsEventHandler(SceneView_ControlsSelectionChanged);
                sceneView.ActiveViewChanged += new SceneView.ViewEventHandler(SceneView_ActiveViewChanged);
                sceneView.GUIControlUpdated += new SceneView.ControlEventHandler(SceneView_ControlUpdated);
                sceneView.Enter += new EventHandler(SceneView_Enter);
                sceneView.FormClosing += new FormClosingEventHandler(SceneView_FormClosing);
                sceneView.FormClosed += new FormClosedEventHandler(SceneView_FormClosed);
                
                sceneView.Show(mDockPanel, DockState.Document);
            }
        }