Getting rid of unused components

Sda2/P/Register/src/main/java/de/hdm_stuttgart/mi/MainView.java

-package de.hdm_stuttgart.mi;
-
-import com.vaadin.navigator.Navigator;
-import com.vaadin.navigator.View;
-import com.vaadin.navigator.ViewChangeListener.ViewChangeEvent;
-import com.vaadin.server.ThemeResource;
-import com.vaadin.ui.Alignment;
-import com.vaadin.ui.Button;
-import com.vaadin.ui.Embedded;
-import com.vaadin.ui.HorizontalLayout;
-import com.vaadin.ui.Label;
-import com.vaadin.ui.Panel;
-import com.vaadin.ui.VerticalLayout;
-import com.vaadin.ui.Button.ClickEvent;
-
-public class MainView extends VerticalLayout implements View {
-	
-	public final static String viewId = MainView.class.getCanonicalName();
-	
-	final Navigator navigator;
-	
-	private static final long serialVersionUID = -3398565663865641952L;
-	Panel panel;
-	// Menu navigation button listener
-	class ButtonListener implements Button.ClickListener {
-		/**
-		 * 
-		 */
-		private static final long serialVersionUID = 7946490742222622732L;
-		String menuitem;
-		public ButtonListener(String menuitem) {
-			this.menuitem = menuitem;
-		}
-		@Override
-		public void buttonClick(ClickEvent event) {
-			// Navigate to a specific state
-			navigator.navigateTo(viewId + "/" + menuitem);
-		}
-	}
-	
-	public MainView(Navigator navigator) {
-		this.navigator = navigator;
-		setSizeFull();
-
-		// Layout with menu on left and view area on right
-		HorizontalLayout hLayout = new HorizontalLayout();
-		hLayout.setSizeFull();
-
-		// Have a menu on the left side of the screen
-		Panel menu = new Panel("List of Equals");
-		menu.setHeight("100%");
-		menu.setWidth(null);
-		VerticalLayout menuContent = new VerticalLayout();
-
-		menuContent.addComponent(new Button("Pig", event -> navigator.navigateTo(viewId + "/pig")));
-		menuContent.addComponent(new Button("Cat", event -> navigator.navigateTo(viewId + "/cat")));
-		menuContent.addComponent(new Button("Dog", event -> navigator.navigateTo(viewId + "/dog")));
-		menuContent.addComponent(new Button("Reindeer", event -> navigator.navigateTo(viewId + "/reindeer")));
-		menuContent.addComponent(new Button("Penguin", event -> navigator.navigateTo(viewId + "/penguin")));
-		menuContent.addComponent(new Button("Sheep", event -> navigator.navigateTo(viewId + "/sheep")));
-
-		menuContent.setWidth(null);
-		menuContent.setMargin(true);
-		menu.setContent(menuContent);
-		hLayout.addComponent(menu);
-
-		// A panel that contains a content area on right
-		panel = new Panel("An Equal");
-		panel.setSizeFull();
-		hLayout.addComponent(panel);
-		hLayout.setExpandRatio(panel, 1.0f);
-
-		addComponent(hLayout);
-		setExpandRatio(hLayout, 1.0f);
-
-		// Allow going back to the start
-		Button logout = new Button("Logout", event -> navigator.navigateTo(StartView.viewId));
-
-		addComponent(logout);
-	}        @Override
-	public void enter(ViewChangeEvent event) {
-		VerticalLayout panelContent = new VerticalLayout();
-		panelContent.setSizeFull();
-		panelContent.setMargin(true);
-		panel.setContent(panelContent); // Also clears
-
-		if (event.getParameters() == null
-				|| event.getParameters().isEmpty()) {
-			panelContent.addComponent(
-					new Label("Nothing to see here, " +
-							"just pass along."));
-		} else {
-
-			// Display the fragment parameters
-			Label watching = new Label(
-					"You are currently watching a " +
-							event.getParameters());
-			watching.setSizeUndefined();
-			panelContent.addComponent(watching);
-			panelContent.setComponentAlignment(watching,
-					Alignment.MIDDLE_CENTER);
-
-			// Some other content
-			Embedded pic = new Embedded(null,
-					new ThemeResource("img/" + event.getParameters() +
-							"-128px.png"));
-			panelContent.addComponent(pic);
-
-			panelContent.setExpandRatio(pic, 1.0f);
-			panelContent.setComponentAlignment(pic,
-					Alignment.MIDDLE_CENTER);
-
-			Label back = new Label("And the " +
-					event.getParameters() + " is watching you");
-			back.setSizeUndefined();
-			panelContent.addComponent(back);
-			panelContent.setComponentAlignment(back,
-					Alignment.MIDDLE_CENTER);
-		}
-	}
-}

Sda2/P/Register/src/main/java/de/hdm_stuttgart/mi/NavigatorUI.java

@@ -30,7 +30,5 @@ public class NavigatorUI extends UI {
 
 		// Create and register the views
 		navigator.addView(MyLogin.viewId, new MyLogin(navigator));
-		navigator.addView(MainView.viewId, new MainView(navigator));
-		navigator.addView(Register.viewId, new Register(navigator));
 	}
 }
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Sda2/P/Register/src/main/java/de/hdm_stuttgart/mi/StartView.java

-package de.hdm_stuttgart.mi;
-
-import com.vaadin.navigator.Navigator;
-import com.vaadin.navigator.View;
-import com.vaadin.navigator.ViewChangeListener.ViewChangeEvent;
-import com.vaadin.ui.Alignment;
-import com.vaadin.ui.Button;
-import com.vaadin.ui.Notification;
-import com.vaadin.ui.VerticalLayout;
-
-public class StartView extends VerticalLayout implements View {
-	private static final long serialVersionUID = 5707450803013602523L;
-
-	public final static String viewId = "";// The start view's id must be an empty string
-
-	public StartView(final Navigator navigator) {
-		setSizeFull();
-
-		final Button button = new Button("Go to Main View", event -> navigator.navigateTo(MainView.viewId));
-
-		addComponent(button);
-		setComponentAlignment(button, Alignment.MIDDLE_CENTER);
-	}        
-
-	@Override
-	public void enter(ViewChangeEvent event) {
-		Notification.show("Welcome to the Animal Farm");
-	}
-}
\ No newline at end of file