@SuppressWarnings("serial")
@Theme("liferay")
public class ProjectTemplateUI extends UI {
	Navigator navigator;
	protected static final String MAINVIEW = "main";

	/** A start view for navigating to the main view */
	public class StartView extends VerticalLayout implements View {
		public StartView() {
			setSizeFull();
			setVisible(true);

			Button button = new Button("Go to Main View", new Button.ClickListener() {
				@Override
				public void buttonClick(ClickEvent event) {
					navigator.navigateTo(MAINVIEW);
				}
			});
			addComponent(button);
			setComponentAlignment(button, Alignment.MIDDLE_CENTER);
		}

		@Override
		public void enter(ViewChangeEvent event) {
			Notification.show("Welcome to the Animal Farm");
		}
	}

	/** Main view with a menu */
	public class MainView extends VerticalLayout implements View {
		  Panel panel;
		// Menu navigation button listener
		class ButtonListener implements Button.ClickListener {
			String menuitem;

			public ButtonListener(String menuitem) {
				this.menuitem = menuitem;
			}

			@Override
			public void buttonClick(ClickEvent event) {
				// Navigate to a specific state
				navigator.navigateTo(MAINVIEW + "/" + menuitem);
			}
		}

		public MainView() {
			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", new ButtonListener("pig")));
			menuContent.addComponent(new Button("Cat", new ButtonListener("cat")));
			menuContent.addComponent(new Button("Dog", new ButtonListener("dog")));
			menuContent.addComponent(new Button("Reindeer", new ButtonListener("reindeer")));
			menuContent.addComponent(new Button("Penguin", new ButtonListener("penguin")));
			menuContent.addComponent(new Button("Sheep", new ButtonListener("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", new Button.ClickListener() {
				@Override
				public void buttonClick(ClickEvent event) {
					navigator.navigateTo("");
				}
			});
			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."));
				return;
			}

			// 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);
		}
	}

	@Override
	protected void init(VaadinRequest request) {
		getPage().setTitle("Navigation Example");

		// Create a navigator to control the views
		navigator = new Navigator(this, this);

		// Create and register the views
		navigator.addView("", new StartView());
		navigator.addView(MAINVIEW, new MainView());
	}
	
	/*
	@Override
	protected void init(VaadinRequest request) {
		final VerticalLayout layout = new VerticalLayout();
		layout.setMargin(true);
		setContent(layout);

		Button button = new Button("Click Me");
		button.addClickListener(new Button.ClickListener() {
			public void buttonClick(ClickEvent event) {
				layout.addComponent(new Label("Thank you for clicking"));
			}
		});
		layout.addComponent(button);
	}
	*/
	
	

}