Why Vaadin Window.ResizeListener is not invoked

Question

I have the following class as following:-¨

public class ExchangeWindow extends Window implements Button.ClickListener, Window.ResizeListener  {

public ExchangeWindow() {
    center();
    setWidth(600, Unit.PIXELS);
    setHeight(430, Unit.PIXELS);
    setModal(true);
    setResizable(true);
    setImmediate(true);
    addListener(this);
 }

@Override
public void windowResized(ResizeEvent resizeEvent) {
    if(left.isVisible()) {
        //left.setWidth(600, UNITS_PIXELS);
        exchangeTable.setWidth(600, UNITS_PIXELS);
    }
}

I found this link: https://vaadin.com/forum/thread/117302 . I guess my code is similar to this. windowResized method is never called whether I set setImmediate(true); or setImmediate(false);

I am using Vaadin 7.

What is wrong? How to catch the resize event notification?

Answer 1

Judging by the code sample in that link and the date of the post (8 years ago), the link you provided is probably for a Vaadin6 problem, as Vaadin7 was released in 2013.

Anyway, instead of addListener(this); you should use addResizeListener(this);:

public class WindowWithResizeListener extends Window implements Button.ClickListener, Window.ResizeListener {

    public WindowWithResizeListener() {
        center();
        setWidth(600, Unit.PIXELS);
        setHeight(430, Unit.PIXELS);
        setModal(true);
        setResizable(true);
        setImmediate(true);
        addResizeListener(this);
    }

    @Override
    public void windowResized(ResizeEvent resizeEvent) {
        Notification.show("Resized!");

    }

    @Override
    public void buttonClick(Button.ClickEvent clickEvent) {

    }
}

And there's the output with Vaadin 7.7.9: