Vaadin 7 fire custom events between components

Question

I want to create custom events and fire them in some part of the view such that some other part of the view is updated/removed/refreshed.

I have tried by extending the C

Answer 1

You can use EventRouter. But I do not use it.

Or You can use ObjectProperty.

This object can firing event when value is changed. For example:

public class MyApplication extends UI{
  private ObjectProperty myState= new ObjectProperty(new MyState());

  public ObjectProperty getMyState(){return myState;}

}


public class MyComponent1 extends VerticalLayout{

  public MyComponent1(){

  //create UI
  ....

  updateData();

  Property.ValueChangeListener updateListener = new Property.ValueChangeListener() {
                    @Override
                    public void valueChange(Property.ValueChangeEvent event) {
                       updateData();
                    }
                };
  MyApplication.getCurrent().getDispatcher().addValueChangeListener(updateListener);


  }

private void updateData(){
  MyState myState = MyApplication.getCurrent().getMyState().getValue();

  //update this component with myState

}
}

 public class MyComponent2 extends VerticalLayout{/*Similarly with Component1*/}