Examples of com.vaadin.ui.Notification

com.vaadin.ui.Notification
A notification message, used to display temporary messages to the user - for example "Document saved", or "Save failed".
The notification message can consist of several parts: caption, description and icon. It is usually used with only caption - one should be wary of filling the notification with too much information.

The notification message tries to be as unobtrusive as possible, while still drawing needed attention. There are several basic types of messages that can be used in different situations:
- TYPE_HUMANIZED_MESSAGE fades away quickly as soon as the user uses the mouse or types something. It can be used to show fairly unimportant messages, such as feedback that an operation succeeded ("Document Saved") - the kind of messages the user ignores once the application is familiar.
- TYPE_WARNING_MESSAGE is shown for a short while after the user uses the mouse or types something. It's default style is also more noticeable than the humanized message. It can be used for messages that do not contain a lot of important information, but should be noticed by the user. Despite the name, it does not have to be a warning, but can be used instead of the humanized message whenever you want to make the message a little more noticeable.
- TYPE_ERROR_MESSAGE requires to user to click it before disappearing, and can be used for critical messages.
- TYPE_TRAY_NOTIFICATION is shown for a while in the lower left corner of the window, and can be used for "convenience notifications" that do not have to be noticed immediately, and should not interfere with the current task - for instance to show "You have a new message in your inbox" while the user is working in some other area of the application.
In addition to the basic pre-configured types, a Notification can also be configured to show up in a custom position, for a specified time (or until clicked), and with a custom stylename. An icon can also be added.

        // Paint notifications
        if (notifications != null) {
            target.startTag("notifications");
            for (final Iterator<Notification> it = notifications.iterator(); it
                    .hasNext();) {
                final Notification n = it.next();
                target.startTag("notification");
                if (n.getCaption() != null) {
                    target.addAttribute(
                            UIConstants.ATTRIBUTE_NOTIFICATION_CAPTION,
                            n.getCaption());
                }
                if (n.getDescription() != null) {
                    target.addAttribute(
                            UIConstants.ATTRIBUTE_NOTIFICATION_MESSAGE,
                            n.getDescription());
                }
                if (n.getIcon() != null) {
                    target.addAttribute(
                            UIConstants.ATTRIBUTE_NOTIFICATION_ICON,
                            n.getIcon());
                }
                if (!n.isHtmlContentAllowed()) {
                    target.addAttribute(
                            UIConstants.NOTIFICATION_HTML_CONTENT_NOT_ALLOWED,
                            true);
                }
                target.addAttribute(
                        UIConstants.ATTRIBUTE_NOTIFICATION_POSITION, n
                                .getPosition().ordinal());
                target.addAttribute(UIConstants.ATTRIBUTE_NOTIFICATION_DELAY,
                        n.getDelayMsec());
                if (n.getStyleName() != null) {
                    target.addAttribute(
                            UIConstants.ATTRIBUTE_NOTIFICATION_STYLE,
                            n.getStyleName());
                }
                target.endTag("notification");
            }
            target.endTag("notifications");
            notifications = null;

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        layout.addComponent(new Label("abc"));
        layout.addComponent(new Button("B", new ClickListener() {


            @Override
            public void buttonClick(ClickEvent event) {
                Notification n = new Notification("Test");
                getMainWindow().showNotification(n);
            }


        }));

View Full Code Here

                return actions;
            }
        };


        // Notification
        Notification n = new Notification("Hey there!");
        n.setIcon(icon);
        n.setPosition(Position.BOTTOM_CENTER);
        n.setDelayMsec(300000);
        n.show(Page.getCurrent());


        // grid of compoents
        GridLayout gl = new GridLayout(4, 5);
        gl.setSpacing(true);
        layout.addComponent(gl);

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                    @Override
                    public void buttonClick(ClickEvent event) {
                        if (getUI() == getMainWindow()) {
                            getUI().getPage().showNotification(
                                    new Notification("main"));
                            try {
                                Thread.sleep((5000));
                            } catch (InterruptedException e) {
                                // TODO Auto-generated catch block
                                e.printStackTrace();

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            @Override
            public void buttonClick(ClickEvent event) {
                try {
                    p3l.addComponent(p2);
                    new Notification("ERROR", "This should have failed",
                            Notification.TYPE_ERROR_MESSAGE).show(Page
                            .getCurrent());
                } catch (Exception e) {
                    new Notification("OK", "threw, as expected",
                            Notification.TYPE_ERROR_MESSAGE).show(Page
                            .getCurrent());
                }
            }


        });
        main.addComponent(b);
        b = new Button("recurse2", new Button.ClickListener() {


            @Override
            public void buttonClick(ClickEvent event) {
                VerticalLayout layout = new VerticalLayout();
                Panel p = new Panel("dynamic", layout);
                layout.addComponent(p2);
                try {
                    p3l.addComponent(p);
                    new Notification("ERROR", "This should have failed",
                            Notification.TYPE_ERROR_MESSAGE).show(Page
                            .getCurrent());
                } catch (Exception e) {
                    new Notification("OK", "threw, as expected",
                            Notification.TYPE_ERROR_MESSAGE).show(Page
                            .getCurrent());
                }
            }

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    @Override
    public void receiveBroadcast(final String message) {
        access(new Runnable() {
            @Override
            public void run() {
                Notification n = new Notification("Message received", message,
                        Type.TRAY_NOTIFICATION);
                n.show(getPage());
            }
        });


    }

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        left.addStyleName("show-middle-left");
        left.addClickListener(new ClickListener() {


            @Override
            public void buttonClick(ClickEvent event) {
                Notification notification = new Notification("Notification");
                notification.setDelayMsec(10000);
                notification.setPosition(Position.MIDDLE_LEFT);
                notification.show(getUI().getPage());
            }
        });
        addComponent(left);


        Button right = new Button("Show Notification in middle right");
        right.addStyleName("show-middle-right");
        right.addClickListener(new ClickListener() {


            @Override
            public void buttonClick(ClickEvent event) {
                Notification notification = new Notification("Notification");
                notification.setDelayMsec(10000);
                notification.setPosition(Position.MIDDLE_RIGHT);
                notification.show(getUI().getPage());
            }
        });
        addComponent(right);


    }

View Full Code Here

    protected void setup() {
        Label l = new Label(LoremIpsum.get(10000));
        getLayout().setSizeFull();
        addComponent(l);


        Notification n = new Notification(
                "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This should be a <br/><b>SEMI-TRANSPARENT</b><br/> notification",
                Type.WARNING_MESSAGE);
        n.setHtmlContentAllowed(true);
        n.show(Page.getCurrent());
    }

View Full Code Here

    private class SettingHandler implements ClickListener {
        @Override
        public void buttonClick(ClickEvent event) {
            Type typeValue = (Type) type.getValue();


            Notification n = new Notification(tf.getValue(), typeValue);
            n.setDelayMsec(-1);
            n.setHtmlContentAllowed(true);
            NotificationConfiguration notificationConf = UI.getCurrent()
                    .getNotificationConfiguration();
            notificationConf.setAssistivePrefix(typeValue, prefix.getValue());
            notificationConf.setAssistivePostfix(typeValue, postfix.getValue());
            notificationConf.setAssistiveRole(typeValue,
                    (NotificationRole) role.getValue());


            n.show(Page.getCurrent());
        }

View Full Code Here

    }


    private class DefaultHandler implements ClickListener {
        @Override
        public void buttonClick(ClickEvent event) {
            Notification n = new Notification(tf.getValue(),
                    (Type) type.getValue());
            n.setHtmlContentAllowed(true);
            n.show(Page.getCurrent());
        }

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