On Wed, 19 May 2010, Derrell Lipman wrote:
> On Wed, May 19, 2010 at 14:00, Fritz Zaucker <[email protected]> wrote:
>
>> P.S.: I don't understand mixin's well enough, so this might be a silly
>> question: if I use it in my application, then the method is added to
>> every object in my application? Or could a mixin just have a "local"
>> effect on the objects of a specific class (e.g., only in those
>> classes, where I have a need for bind())?
>>
>
> A mixin has an effect on every object of the class to which it is "mixed
> in", including every object which descends from that class. Since nearly
> every class in qooxdoo descends from qx.core.Object, any methods mixed in to
> qx.core.Object are included in nearly every qooxdoo object. That's why
> Fabian's point has merit.
That I understand. What I am wondering is, if I could in own of my own class
files (e.g. extending qx.ui.toolbar.Toolbar) instead of
qx.Class.include(qx.core.Object, custom.MObject);
use
qx.Class.include(qx.ui.toolbar.Toolbar, custom.MObject);
and thus only add the bindto() method to objects descending of Toolbar. If
this could be done with the same (or somehow generic) mixin, it would give
me all control about where to use this convenience method (without
explicitely defining it myself in each class I want to use it in, which I
could, I guess?).
Cheers,
Fritz
--
Oetiker+Partner AG tel: +41 62 775 9903 (direct)
Fritz Zaucker +41 62 775 9900 (switch board)
Aarweg 15 +41 79 675 0630 (mobile)
CH-4600 Olten fax: +41 62 775 9905
Schweiz web: www.oetiker.ch
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