Lazy Tooltip Add-on is an add-on for Vaadin.

Version 2.0.0 can be used with Vaadin 8.2+ (master branch).

Version 1.0.0 can be used with Vaadin 7.3+ (vaadin7 branch).

The Vaadin add-ons installation is described on the Vaadin website: https://vaadin.com/directory/help/using-vaadin-add-ons/

Note that the Lazy Tooltip Add-on will replace the VTooltip widget with VLazyTooltip (see LazyTooltipWidgetset.gwt.xml).

This add-on is built with maven. To build and run the demo:

mvn clean install

cd lazytooltip-demo

mvn jetty:run

To see the demo, navigate to http://localhost:8080/

A Lazy Tooltip can be added to any Vaadin component:

LazyTooltip lazyTooltip = LazyTooltip.addToComponent(component);

Once added to a component, you should define a handler for the tooltip:

lazyTooltip.setTooltipHandler(handler);

A Lazy Tootlip handler must implement generateTooltip():

public interface LazyTooltipHandler {
    public void generateTooltip(LazyTooltipUpdater updater);
}

generateTooltip() is invoked (lazily) when a tooltip is requested by the client-side widget. LazyTooltipUpdater is the interface that allows the tooltip to be updated. updateTooltip(String tooltip) must be used to update the content of the tooltip. The content of the tooltip will be displayed as HTML (see AbstractComponent.setDescription(String description)).

With Java 8, you could use a lambda expression to define the tooltip handler:

lazyTooltip.setTooltipHandler((LazyTooltipUpdater updater) ->
    updater.updateTooltip("This is a static tooltip"));

Note that updateTooltip() must be invoked from the Vaadin UI thread to properly update the client component.

updateTooltip() can also be called multiple times and the tooltip will be updated dynamically on the client side as long as the tooltip is open.

vaadin-lazytooltip is released under the Apache License, Version 2.0.