Examples of com.vaadin.navigator.Navigator

com.vaadin.navigator.Navigator
A navigator utility that allows switching of views in a part of an application.
The view switching can be based e.g. on URI fragments containing the view name and parameters to the view. There are two types of parameters for views: an optional parameter string that is included in the fragment (may be bookmarkable).
Views can be explicitly registered or dynamically generated and listening to view changes is possible.
Note that {@link Navigator} is not a component itself but comes with{@link SimpleViewDisplay} which is a component that displays the selectedview as its contents. @author Vaadin Ltd @since 7.0

        View view1 = control.createMock(View.class);
        View view2 = control.createMock(View.class);
        ViewChangeTestListener listener = new ViewChangeTestListener();


        // create navigator to test
        Navigator navigator = createNavigator(manager, display);


        // prepare mocks: what to expect
        EasyMock.expect(provider.getViewName("test1")).andReturn("test1");
        EasyMock.expect(provider.getView("test1")).andReturn(view1);
        ViewChangeEvent event1 = new ViewChangeEvent(navigator, null, view1,
                "test1", "");
        listener.addExpectedIsViewChangeAllowed(event1, true);
        EasyMock.expect(manager.getState()).andReturn("");
        view1.enter(eventParametersEqual(""));
        display.showView(view1);
        manager.setState("test1");
        listener.addExpectedNavigatorViewChange(event1);


        EasyMock.expect(provider.getViewName("test2")).andReturn("test2");
        EasyMock.expect(provider.getView("test2")).andReturn(view2);
        ViewChangeEvent event2 = new ViewChangeEvent(navigator, view1, view2,
                "test2", "");
        listener.addExpectedIsViewChangeAllowed(event2, true);
        EasyMock.expect(manager.getState()).andReturn("test1");
        view2.enter(eventParametersEqual(""));
        display.showView(view2);
        manager.setState("test2");
        listener.addExpectedNavigatorViewChange(event2);


        control.replay();


        // test navigator
        navigator.addProvider(provider);
        navigator.addViewChangeListener(listener);


        navigator.navigateTo("test1");
        navigator.navigateTo("test2");


        if (!listener.isReady()) {
            fail("Missing listener calls");
        }
    }

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        EasyMock.replay(tv1, tv2);


        VerticalLayout container = new VerticalLayout();
        ViewDisplay display = new Navigator.ComponentContainerViewDisplay(
                container);
        Navigator navigator = createNavigator(new NullFragmentManager(),
                display);


        navigator.addView("tv1", tv1);
        navigator.addView("tv2", tv2);


        navigator.navigateTo("tv1");


        assertSame(tv1, container.getComponent(0));
        assertEquals(1, container.getComponentCount());


        navigator.navigateTo("tv2");


        assertSame(tv2, container.getComponent(0));
        assertEquals(1, container.getComponentCount());
    }

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        View view1 = control.createMock(View.class);
        View view2 = control.createMock(View.class);
        ViewChangeTestListener listener1 = new ViewChangeTestListener();
        ViewChangeTestListener listener2 = new ViewChangeTestListener();


        Navigator navigator = createNavigator(manager, display);


        // prepare mocks: what to expect
        // first listener blocks first view change
        EasyMock.expect(provider.getViewName("test1")).andReturn("test1");
        EasyMock.expect(provider.getView("test1")).andReturn(view1);
        EasyMock.expect(manager.getState()).andReturn("");
        ViewChangeEvent event1 = new ViewChangeEvent(navigator, null, view1,
                "test1", "");
        listener1.addExpectedIsViewChangeAllowed(event1, false);


        // second listener blocks second view change
        EasyMock.expect(provider.getViewName("test1/test")).andReturn("test1");
        EasyMock.expect(provider.getView("test1")).andReturn(view1);
        EasyMock.expect(manager.getState()).andReturn("");
        ViewChangeEvent event2 = new ViewChangeEvent(navigator, null, view1,
                "test1", "test");
        listener1.addExpectedIsViewChangeAllowed(event2, true);
        listener2.addExpectedIsViewChangeAllowed(event2, false);


        // both listeners allow view change
        EasyMock.expect(provider.getViewName("test1/bar")).andReturn("test1");
        EasyMock.expect(provider.getView("test1")).andReturn(view1);
        EasyMock.expect(manager.getState()).andReturn("");
        ViewChangeEvent event3 = new ViewChangeEvent(navigator, null, view1,
                "test1", "bar");
        listener1.addExpectedIsViewChangeAllowed(event3, true);
        listener2.addExpectedIsViewChangeAllowed(event3, true);
        view1.enter(EasyMock.isA(ViewChangeEvent.class));
        display.showView(view1);
        manager.setState("test1/bar");
        listener1.addExpectedNavigatorViewChange(event3);
        listener2.addExpectedNavigatorViewChange(event3);


        // both listeners allow view change from non-null view
        EasyMock.expect(provider.getViewName("test2")).andReturn("test2");
        EasyMock.expect(provider.getView("test2")).andReturn(view2);
        EasyMock.expect(manager.getState()).andReturn("view1");
        ViewChangeEvent event4 = new ViewChangeEvent(navigator, view1, view2,
                "test2", "");
        listener1.addExpectedIsViewChangeAllowed(event4, true);
        listener2.addExpectedIsViewChangeAllowed(event4, true);
        view2.enter(EasyMock.isA(ViewChangeEvent.class));
        display.showView(view2);
        manager.setState("test2");
        listener1.addExpectedNavigatorViewChange(event4);
        listener2.addExpectedNavigatorViewChange(event4);


        control.replay();


        // test navigator
        navigator.addProvider(provider);
        navigator.addViewChangeListener(listener1);
        navigator.addViewChangeListener(listener2);


        navigator.navigateTo("test1");
        navigator.navigateTo("test1/test");
        navigator.navigateTo("test1/bar");
        navigator.navigateTo("test2");


        if (!listener1.isReady()) {
            fail("Missing listener calls for listener1");
        }
        if (!listener2.isReady()) {

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                "Adding second view class with same name should override previous view",
                TestView.class, navigator.getView("test").getClass());
    }


    public void testAddViewWithNullName() throws Exception {
        Navigator navigator = new TestNavigator();


        try {
            navigator.addView(null, new TestView());
            fail("addView() accepted null view name");
        } catch (IllegalArgumentException e) {
        }
        try {
            navigator.addView(null, TestView.class);
            fail("addView() accepted null view name");
        } catch (IllegalArgumentException e) {
        }
    }

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        } catch (IllegalArgumentException e) {
        }
    }


    public void testAddViewWithNullInstance() throws Exception {
        Navigator navigator = new TestNavigator();


        try {
            navigator.addView("test", (View) null);
            fail("addView() accepted null view instance");
        } catch (IllegalArgumentException e) {
        }
    }

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        } catch (IllegalArgumentException e) {
        }
    }


    public void testAddViewWithNullClass() throws Exception {
        Navigator navigator = new TestNavigator();


        try {
            navigator.addView("test", (Class<View>) null);
            fail("addView() accepted null view class");
        } catch (IllegalArgumentException e) {
        }
    }

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        NavigationStateManager manager = EasyMock
                .createNiceMock(NavigationStateManager.class);
        EasyMock.replay(manager);


        Navigator navigator = new Navigator(createMockUI(), manager, display);
        navigator.addView("view", view);
        navigator.navigateTo("view");
    }

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    String loggedInUser;


    @Override
    public void init(VaadinRequest request) {
        // Create Navigator, make it control the ViewDisplay
        navigator = new Navigator(this, this);


        // Add some Views
        // no fragment for main view
        navigator.addView(MainView__LastNavigatorExample.NAME,
                new MainView__LastNavigatorExample(navigator));

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        try {
            VerticalLayout layout = new VerticalLayout();
            layout.setMargin(true);
            setContent(layout);


            navi = new Navigator(this, naviLayout);


            navi.addView("", new DefaultView());


            navi.addView("list", new ListView());
            navi.addView("edit", new EditView());

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        getPage().init(request);


        // Call the init overridden by the application developer
        init(request);


        Navigator navigator = getNavigator();
        if (navigator != null) {
            // Kickstart navigation if a navigator was attached in init()
            navigator.navigateTo(navigator.getState());
        }
    }

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