vaadin 8 custom listener

Vaadin 6 / 7 / 8
1

How can I create one component thats fire one listener something like this:

public class MyClass extends VerticalLayout {
    public MyClass(){
    Button btn = new Button("Teste");
    btn.addClickListener(evt->{ FIRE ONE EVENT});
    addComponent(btn);
    }
}



public class MyClass2 extends VerticalLayout {
    public MyClass2(){
    MyClass myClass = new MyClass();
myClass.addMyListener(evt-> { will execute when user click in btn from MyClass} );
addComponent(myClass);
    }
}

tks

2

Hi,

it depends a bit if you want to do it the Vaadin 8 way or not, but take a look at
Button.java in the Framework
 for a pretty good example. As long as you’re extending any Component, you will be also extending AbstractClientConnector, which has the basic functionality for event handling. Look especially at line #318, where the addClickListener method is defined:
https://github.com/vaadin/framework/blob/master/server/src/main/java/com/vaadin/ui/Button.java#L318

and on line #357
https://github.com/vaadin/framework/blob/master/server/src/main/java/com/vaadin/ui/Button.java#L357
 you can see how to fire an EventObject.

Hope this helps,

Olli