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

            @Override
            protected String getCss(Component c) {
                return "display: block; padding:20px; border: 2px dotted black; background: #aaa;";
            }
        };
        Component l = new Label("Drag file on me");
        l.setSizeUndefined();
        cssLayout.addComponent(l);
        DragAndDropWrapper dragAndDropWrapper = new DragAndDropWrapper(
                cssLayout);
        dragAndDropWrapper.setSizeUndefined();
        dragAndDropWrapper.setDropHandler(new DropHandler() {

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            public void valueChange(ValueChangeEvent event) {
                Testable t = (Testable) select.getValue();
                if (t != null) {
                    testPanelLayout.removeAllComponents();
                    try {
                        Component c = t.getComponent();
                        if (c != null) {
                            testPanelLayout.addComponent(c);
                        }
                    } catch (InstantiationException e) {
                        // TODO Auto-generated catch block

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                            @Override
                            public Component getComponent()
                                    throws InstantiationException,
                                    IllegalAccessException {


                                Component c = super.getComponent();


                                VerticalLayout pl = new VerticalLayout();
                                pl.setMargin(true);
                                Panel p = new Panel(
                                        "Wrapper panel (400px*400px)", pl);
                                p.setContent(new VerticalLayout());
                                p.setWidth("400px");
                                p.setHeight("400px");
                                pl.addComponent(c);
                                p.addStyleName("testablew");
                                p.addStyleName("testable");
                                return p;
                            }


                        };
                        t.addConfiguration(new Configuration("100%*100%") {
                            @Override
                            void configure(Component c) {
                                c.setSizeFull();
                            }


                        });
                        cont.addItem(t);
                    }

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            @Override
            public void buttonClick(ClickEvent event) {
                Random randomGenerator = new Random();
                int random = randomGenerator.nextInt(3);
                Component component;
                if (random % 3 == 0) {
                    component = new Label("A new label");
                } else if (random % 3 == 1) {
                    component = new Button("A button!");
                } else {

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        return wrap(gl, "GridLayout");
    }


    protected void logLayoutClick(String layout, LayoutClickEvent event) {
        String target = "&lt;none>";
        Component component = event.getChildComponent();
        if (component != null) {
            target = component.getCaption();
            if (target == null && component instanceof Label) {
                target = ((Label) component).getValue().toString();
            }
        }
        String button = event.getButtonName();

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                    @Override
                    public void buttonClick(ClickEvent event) {
                        for (Iterator<Component> i = layout
                                .getComponentIterator(); i.hasNext();) {
                            final Component c = i.next();
                            if (c.isEnabled()) {
                                c.setEnabled(false);
                                c.setCaption(c.getCaption().replace("enabled",
                                        "disabled"));
                            } else {
                                c.setEnabled(true);
                                c.setCaption(c.getCaption().replace("disabled",
                                        "enabled"));
                            }
                        }
                        if (layout.getComponent(0).isEnabled()) {
                            enableDisableComponentsButton

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                Transferable ctr = event.getTransferable();
                if (ctr.getSourceComponent() != null) {
                    // use "component" (from DragDropPane) if available, else
                    // take
                    // the source component
                    Component component = (Component) ctr.getData("component");
                    if (component == null) {
                        component = ctr.getSourceComponent();
                    }


                    if (component.getParent() != layout) {
                        if (ctr instanceof DataBoundTransferable) {
                            // Item has been dragged, construct a Label from
                            // Item id
                            Label l = new Label();
                            l.setSizeUndefined();

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        WrapperTargetDetails ed = (WrapperTargetDetails) event
                .getTargetDetails();
        Transferable ctr = event.getTransferable();
        // use "component" (from DragDropPane) if available, else take
        // the source component
        Component component = null;
        if (ctr instanceof WrapperTransferable) {
            component = ((WrapperTransferable) ctr).getDraggedComponent();
        } else if (ctr instanceof DataBoundTransferable) {
            // Item has been dragged, construct a Label from
            // Item id
            Label l = new Label();
            l.setSizeUndefined();
            l.setValue("ItemId : " + ((DataBoundTransferable) ctr).getItemId());
            component = l;
        }


        if (component != null) {


            if (component.getParent() != root) {


                root.addComponent(component);


                Integer left = ed.getAbsoluteLeft();
                Integer top = ed.getAbsoluteTop();

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            tf.setImmediate(true);
            tf.addListener(new ValueChangeListener() {


                @Override
                public void valueChange(ValueChangeEvent event) {
                    Component c = ((Component) event.getProperty());
                    c.setCaption("askfdj");


                }
            });
            if (r.nextBoolean()) {
                tf.setCaption("Caption");

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        i.getItemProperty(CAPTION).setValue(locale.toString());


    }


    protected void setDateFieldLocale(Locale value) {
        Component n = getCustomFormats(value);
        if (customFormats == null) {
            addComponent(n);
        } else {
            replaceComponent(customFormats, n);
        }

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Related Classes of com.vaadin.ui.Component

com.es.app.component.ComponenManage

com.vaadin.event.DataBoundTransferable

com.vaadin.event.dd.acceptcriteria.SourceIs

com.vaadin.event.dd.acceptcriteria.SourceIsTarget

com.vaadin.event.LayoutEvents$LayoutClickEvent

com.vaadin.server.AbstractCommunicationManager

com.vaadin.server.ComponentSizeValidator

com.vaadin.server.ComponentSizeValidator$InvalidLayout

com.vaadin.server.DefaultErrorHandler

com.vaadin.server.DragAndDropService

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