Re: Textarea KeyUpHandler not working

Hi Thomas,

thanks for your explanation. I had that setElement(rootPanel.getElement()) thing in my mind, but I didn't really got what it does until your explanation. Now it makes much sense to me what happened.

Cheers,
Marco

Am Mittwoch, 28. November 2012 14:45:51 UTC+1 schrieb Thomas Broyer:

On Wednesday, November 28, 2012 1:40:18 PM UTC+1, marco wrote:

Ok I fixed it, with the following changes

-public class ValidatableTextarea extends ComplexPanel
+public class ValidatableTextarea extends FlowPanel

-   private FlowPanel rootPanel;
    protected TextArea input;

    private Label errorLabel;

    @UiConstructor 
    public ValidatableTextarea() { 
        input = new TextArea(); 
-       rootPanel = new FlowPanel(); 
-       rootPanel.add(input); 

+       add(input)

-       setElement(rootPanel.getElement()); 
    }

    ...
    public void setText(String text) { 
        input.setText(String Text); 
    }

    ...
    public void addKeyUpHandler(KeyUpHandler keyUpHandler) { 
        input.addKeyUpHandler(keyUpHandler); 
    }

Don't know why but it's working now.

I know why: setElement() is only meant to be used when you create your own Widget, not when you extend an existing one. The root of your problem was actually using rootPanel;getElement() as the element for another widget, yet adding widgets to rootPanel (which is never attached to the DOM: its element is "physically" attached, by way of the ValidatableTextArea, but the FlowPanel itself is not "logically" attached.

Now, instead of extending FlowPanel, you should extend Composite instead, and use a FlowPanel with setWidget (more or less reverting to your previous code, fixing it: ComplexPanel→Composite, setElement→setWidget)

--
You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group.
To view this discussion on the web visit https://groups.google.com/d/msg/google-web-toolkit/-/vlSS2xPuS5AJ.
To post to this group, send email to google-web-toolkit@googlegroups.com.
To unsubscribe from this group, send email to google-web-toolkit+unsubscribe@googlegroups.com.
For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.