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Jakub Kuźma

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Extend and widgets

Post Posted: Mon Jul 06, 2009 2:49 pm
+-1-
Hi everybody!

I've just started to learn YUI3, and I think I'll have a lot of questions about it. I'm trying to create hierarchy of widgets like: Exchange < Resources < Widget. Because Exchange widget is slightly different than Resources widget, I need to override e.g. renderUI method to add some additional stuff there. The question is: how can I call renderUI method from base (Resources) class? After a lot of different approaches I've found the bind method working:
Code:
renderUI: function() {
  Y.bind(Resources.superclass.renderUI, this)();
}

Is there any easier way to do it?

Another qustion: can I create widgets inside of other widgets? I know it's possible, but does it make any sense? Maybe there's a better way to do it?

I'm trying to make a game based on The Settlers of Catan board game. The code is available on Github: http://github.com/qoobaa/pioneers/tree/yui. ANY help is appreciated, I'd be perfect to hear a criticism or some hints :-).

Satyen Desai

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Re: Extend and widgets

Post Posted: Mon Jul 06, 2009 3:16 pm
+0-
If I'm following you correctly (Exchange extends Resource extends Widget), you can just do this:

Code:

Exchange.prototype.renderUI = function() {
    // Call Resource's renderUI from Exchange
    return Exchange.superclass.renderUI.apply(this, arguments);
}

or,

Resource.prototype.renderUI = function() {
    // Call Widget's renderUI from Resource
    return Resource.superclass.renderUI.apply(this, arguments);
}


Yes, you can nest Widgets, however we don't have the parent/child relationship formalized yet. Look for that to take shape in the 3.1 release.

Joh

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Re: Extend and widgets

Post Posted: Mon Jul 20, 2009 6:37 am
+0-
sdesai wrote:
Code:

Exchange.prototype.renderUI = function() {
    // Call Resource's renderUI from Exchange
    return Exchange.superclass.renderUI.apply(this, arguments);
}




I want to mention for your own troubleshooting that .apply(..) gives me in my class hierarchies a silent die on calling my superclass constructors (and methods).
I only get this working with
Code:
superclass.constructor.call(this, args);


Regards
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