Examples of com.vaadin.ui.Component

com.vaadin.ui.Component
{@code Component} is the top-level interface that is and must be implementedby all Vaadin components. {@code Component} is paired with{@link AbstractComponent}, which provides a default implementation for all the methods defined in this interface.
Components are laid out in the user interface hierarchically. The layout is managed by layout components, or more generally by components that implement the {@link ComponentContainer} interface. Such a container is theparent of the contained components.

The {@link #getParent()} method allows retrieving the parent component of acomponent. While there is a {@link #setParent(Component) setParent()}, you rarely need it as you normally add components with the {@link ComponentContainer#addComponent(Component) addComponent()} method ofthe layout or other {@code ComponentContainer}, which automatically sets the parent.

A component becomes attached to an application (and the {@link #attach()} is called) when it or one of its parents is attached to themain window of the application through its containment hierarchy.
@author IT Mill Ltd. @version 6.7.1 @since 3.0

     * @param method
     */
    private void bindEventHandler(Component componentRoot, Object controller,
            Method method) {
        String componentId = method.getAnnotation(UiHandler.class).value();
        Component component = tryToFindComponentById(componentRoot, componentId);


        Class<?> eventType = (method.getParameterTypes().length > 0 ? method
                .getParameterTypes()[0] : null);
        if (eventType == null) {
            throw new BinderException(
                    "Couldn't figure out event type for method " + method + ".");
        }


        Method addListenerMethod = getAddListenerMethod(component.getClass(),
                eventType);
        if (addListenerMethod != null) {
            try {
                Object listener = createListenerProxy(
                        addListenerMethod.getParameterTypes()[0], eventType,

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     * @param method
     */
    private void bindDataSource(Component componentRoot, Object controller,
            Method method) {
        String componentId = method.getAnnotation(UiDataSource.class).value();
        Component component = tryToFindComponentById(componentRoot, componentId);
        Class<?> dataSourceClass = method.getReturnType();


        try {
            // Vaadin data model consists of Property/Item/Container
            // objects and each of them have a Viewer interface.

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            throw new BinderException(e);
        }
    }


    private Component tryToFindComponentById(Component root, String id) {
        Component component = Clara.findComponentById(root, id);
        if (component == null) {
            throw new BinderException("No component found for id: " + id + ".");
        }
        return component;
    }

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        assertEquals(Unit.PERCENTAGE, layout.getPosition(button).getLeftUnits());
    }


    @Test
    public void inflate_singleButtonNoNamespace_buttonInstantiated() {
        Component button = inflater
                .inflate(getXml("single-button-no-namespace.xml"));


        // check that the composition root is actually a Button
        assertEquals(com.vaadin.ui.Button.class, button.getClass());


        // check attributes
        assertEquals("My Button", button.getCaption());
        assertEquals(true, button.isReadOnly());
    }

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        assertEquals(true, button.isReadOnly());
    }


    @Test
    public void inflate_singleLayout_layoutWithMarginsInstantiated() {
        Component layout = inflater.inflate(getXml("single-layout.xml"));


        // check margin="true false false true"
        assertEquals(new MarginInfo(true, false, false, true),
                ((VerticalLayout) layout).getMargin());
    }

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                ((VerticalLayout) layout).getMargin());
    }


    @Test
    public void inflate_singleLayout_sizeFull() {
        Component layout = inflater.inflate(getXml("single-layout.xml"));


        assertEquals(100, layout.getWidth(), 0);
        assertEquals(100, layout.getHeight(), 0);
        assertEquals(Unit.PERCENTAGE, layout.getWidthUnits());
        assertEquals(Unit.PERCENTAGE, layout.getHeightUnits());
    }

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        assertEquals(Unit.PERCENTAGE, layout.getHeightUnits());
    }


    @Test
    public void inflate_simpleMargin_layoutMarginTrue() {
        Component layout = inflater.inflate(getXml("simple-margin.xml"));


        // check margin="true"
        assertEquals(new MarginInfo(true),
                ((VerticalLayout) layout).getMargin());
    }

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    @Test
    public void inflate_alignmentTest_alignmentAssignedCorrectly() {
        VerticalLayout layout = (VerticalLayout) inflater
                .inflate(getXml("alignment-test.xml"));


        Component child = layout.getComponent(0);
        assertEquals(Alignment.TOP_RIGHT, layout.getComponentAlignment(child));
    }

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        assertEquals(Alignment.TOP_RIGHT, layout.getComponentAlignment(child));
    }


    @Test
    public void inflate_layoutAttributes_layoutAttributesApplied() {
        Component layout = inflater.inflate(getXml("layout-attributes.xml"));


        // check that the composition root is actually a VerticalLayout
        assertEquals(com.vaadin.ui.VerticalLayout.class, layout.getClass());


        // check expandRatio
        VerticalLayout verticalLayout = (VerticalLayout) layout;
        Component button = verticalLayout.getComponentIterator().next();
        assertEquals(1.0f, verticalLayout.getExpandRatio(button), 0.0f);
    }

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        assertEquals(1.0f, verticalLayout.getExpandRatio(button), 0.0f);
    }


    @Test
    public void inflate_componentHasWidth_widthAttributeApplied() {
        Component layout = inflater.inflate(getXml("component-width.xml"));


        // check width
        Button button200px = (Button) Clara.findComponentById(layout,
                "button200px");
        assertEquals(200.0f, button200px.getWidth(), 0.0f);

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