GWT FocusPanel, tab and focus handlers

Question

I am implementing my own widget that extends Compositeand implements Focusableand HasFocusHandlers.

The widget contains two widgets in the panel that I bring to FocusPanel, which I use to initialize the widget. My constructor looks something like this:

public CustomBox() {
    panel = new VerticalPanel();
    ...
    panel.add(caption);
    panel.add(icon);
    ...
    focusPanel = new FocusPanel(panel);
    initWidget(focusPanel);
}

I delegate the implementation Focusableand HasFocusHandlersthe focus panel, for example:

@Override
public void setFocus(boolean focused) {
    focusPanel.setFocus(focused);
}

@Override
public void setTabIndex(int index) {
    focusPanel.setTabIndex(index);        
}

@Override
public HandlerRegistration addFocusHandler(FocusHandler handler) {
    return focusPanel.addFocusHandler(handler);
}   

And after that I can use setFocus(true)to set the focus in any of my objects and setTabIndex()to set the tab index. The Tab key also works as expected, but my problem is that I cannot handle focus events, since the method of onFocus()handlers added with help addFocusHandler()is never called.

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?

Answer 1

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