Create listener for CustomComponent in Vaadin

Question

I'm trying to create a CustomComponent in vaadin 7. The component has a VerticalLayout set in its setCompositionRoot() method and some Labels and other layouts are set within that VerticalLayout. Implementing my custom component in the main view class I would like to be able to handle clicks on my custom component, meaning the VerticalLayout as the composition root element:

MyCustomComponent component = new MyCustomComponent();
component.addOnClickListener(listener);

But there is no method like addOnClickListener available. How can I implement that functionality? I know that I can handle a click on a layout with the LayoutClickListener within the custom component, but is there also a way that I can set the listener, where the component is declared, e.g. in the main view class (similar to the code snippet above)?

Answer 1

create your own method like you named addOnClickListener, that take as a parameter LayoutClickListener . Inside the implementation of addOnClickListener you add the listener to your layout. Example:

component.addOnClickListener(new LayoutClickListener() {

            @Override
            public void layoutClick(LayoutClickEvent event) {
                // TODO Auto-generated method stub

            }
        });

and the implementation of component.addOnClickListener:

public void addOnClickListener(LayoutClickListener listener){
    yourVerticalLayout.addLayoutClickListener(listener);
}