Possibility to restrict the view to a component

src/main/java/fr/ill/ics/n3d/Nomad3DEditor.java

@@ -694,4 +694,9 @@ public class Nomad3DEditor extends Application {
 	        }
 	    }
 	}
+
+	public void setComponentAsRoot(Component component) {
+		
+		menuBar.setDisplayedRoot(component);
+	}
 }

src/main/java/fr/ill/ics/n3d/gui/EditorMenuBar.java

@@ -127,7 +127,8 @@ public class EditorMenuBar extends MenuBar {
 	
 	/** True if there are some operations not saved. */
 	private boolean modified = false;
-		
+	
+	
 	private class SubdividedChild {
 		SimpleStringProperty name = new SimpleStringProperty();
 		SimpleStringProperty path = new SimpleStringProperty();
@@ -2941,31 +2942,52 @@ public class EditorMenuBar extends MenuBar {
 	 * Updates the 3D scene and the tree view.
 	 */
 	@SuppressWarnings("unchecked")
-	private void updateScene() {
+	private void updateScene(Component newRootComponent) {
 		if (!modelLoaded()) {
 			return;
 		}
 		
 		// Save the expanded state of the tree items.
-		HashMap<String, Boolean> itemStates = Nomad3DEditor.getInstance().getTreeViewExpandedStates(Nomad3DEditor.getInstance().getModel().getRoot().getTreeItem());
+		HashMap<String, Boolean> itemStates = Nomad3DEditor.getInstance().getTreeViewExpandedStates(newRootComponent.getTreeItem());
 		
 		// We need to reset the movement here.
 		// We prefer to do it in any case because even for axis edition, the change of axis (when cancelling) resets the axis to the initial clone.
 		// It would be necessary to see how to do be able to keep the axis states in the case of reset. 
 		Nomad3DEditor.getInstance().getModel().resetMovement();
 		Nomad3DEditor.getInstance().getModel().clearSelection();
-		Nomad3DEditor.getInstance().getRoot().getChildren().remove(Nomad3DEditor.getInstance().getModel().getRoot().getSceneNode());
+		
+		Nomad3DEditor.getInstance().getRoot().getChildren().remove(Nomad3DEditor.getInstance().getModel().getDisplayedRoot().getSceneNode());
 		Nomad3DEditor.getInstance().getModel().computeSceneHierarchies(activeLod);
-		Nomad3DEditor.getInstance().getRoot().getChildren().add(Nomad3DEditor.getInstance().getModel().getRoot().getSceneNode());
-		Nomad3DEditor.getInstance().getHierarchyView().setRoot(Nomad3DEditor.getInstance().getModel().getRoot().getTreeItem());
+		Nomad3DEditor.getInstance().getRoot().getChildren().add(newRootComponent.getSceneNode());
+		Nomad3DEditor.getInstance().getHierarchyView().setRoot(newRootComponent.getTreeItem());
 
 		// Restore the expanded state of the tree items.
-		Nomad3DEditor.getInstance().expandTreeView(Nomad3DEditor.getInstance().getModel().getRoot().getTreeItem(), itemStates);
+		Nomad3DEditor.getInstance().expandTreeView(newRootComponent.getTreeItem(), itemStates);
 		
 		updateAxes();
 		updateWalls();
 		updateSystem();
 		updateFocus();
+		
+		Nomad3DEditor.getInstance().getModel().setDisplayedRoot(newRootComponent);
+	}
+	
+	/**
+	 * Updates the 3D scene and the tree view.
+	 */
+	@SuppressWarnings("unchecked")
+	private void updateScene() {
+		updateScene(Nomad3DEditor.getInstance().getModel().getDisplayedRoot());
+	}
+
+	public void setDisplayedRoot(Component component) {
+		
+		if (component == null) {
+			updateScene(Nomad3DEditor.getInstance().getModel().getRoot());
+		}
+		else {
+			updateScene(component);
+		}
 	}
 
 }

src/main/java/fr/ill/ics/n3d/gui/HierarchyCell.java

@@ -3,6 +3,7 @@
  */
 package fr.ill.ics.n3d.gui;
 
+import fr.ill.ics.n3d.Nomad3DEditor;
 import fr.ill.ics.n3d.model.Component;
 import javafx.event.ActionEvent;
 import javafx.event.EventHandler;
@@ -38,10 +39,8 @@ public class HierarchyCell extends CheckBoxTreeCell<Component> {
 	public HierarchyCell() {
 		super();
 
-		MenuItem printItem = new MenuItem("Collapse Children");
-		rigthClickMenu.getItems().add(printItem);
-
-		printItem.setOnAction(new EventHandler<ActionEvent>() {
+		MenuItem collapseItem = new MenuItem("Collapse Children");
+		collapseItem.setOnAction(new EventHandler<ActionEvent>() {
 			public void handle(ActionEvent t) {
 
 				// Get the component.
@@ -53,6 +52,30 @@ public class HierarchyCell extends CheckBoxTreeCell<Component> {
 				}
 			}
 		});
+				
+		rigthClickMenu.getItems().add(collapseItem);
+		
+		MenuItem displayOnlyTheComponentItem = new MenuItem("Display Only The Component");
+		displayOnlyTheComponentItem.setOnAction(new EventHandler<ActionEvent>() {
+			public void handle(ActionEvent t) {
+
+				// Get the component.
+				Component component = getItem();
+				
+				Nomad3DEditor.getInstance().setComponentAsRoot(component);
+			}
+		});
+		
+		rigthClickMenu.getItems().add(displayOnlyTheComponentItem);
+		
+		MenuItem displayAllTheComponentsItem = new MenuItem("Display All The Components");
+		displayAllTheComponentsItem.setOnAction(new EventHandler<ActionEvent>() {
+			public void handle(ActionEvent t) {
+				Nomad3DEditor.getInstance().setComponentAsRoot(null);
+			}
+		});
+		
+		rigthClickMenu.getItems().add(displayAllTheComponentsItem);
 	}
 
 	@Override