Re: MVP - interface that implements setVisible()

Thu, 14 Jan 2010 19:31:23 -0800 

Hi Davis,

thanks for the fast reply.
That is actually a good idea, I was always looking for getters to implement on the Display, never occured to me that simple methods that go the other way might be as efficient too. 

Thanks again for your help.

Dominik

Hi Dominik, why not have a display interface like this?

interface Display {
   void toggleVisible(boolean toggle);
}
If you need the presenter to toggle specific widgets on the display create an enum: 

interface Display {

  enum WidgetType {
      BUTTON,
      TEXTBOX
  };

  void toggleVisible(boolean toggle, WidgetType type);
}
On Thu, Jan 14, 2010 at 8:45 PM, Dominik Steiner <[email protected] > wrote: 
Hi there,

I'm wondering how you best handle the situation that in your Presenter
you need to call setVisible() on some UI Object returned via the
Display interface?

I could of course just write something like this in the Presenter

interface Display{
 Widget getOkButton();
}

but that would made the class not JUnit testable. So I'm wondering why
there are interfaces in GWT like HasText in order to set text on a
Label or something but no interface in order to pass that to the
Presenter for setting the visiblity of an UI element?

Am I missing something?

Dominik

P.S. of course I could just extend the Widget class with my own custom
ones and let this implement a custom Interface that defines setVisible
() in order to pass that to the Presenter to make it testable, but
wondering if others have run into the same problem?

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