This is the same issue. My checkin, revision 7680, should fix both. No
performance problem. Internally this fancy stuff is all based around the
native prototype chain :)
Sebastian
Christian Boulanger schrieb:
> Hello Sebastian,
>
> great, thanks! If it was also possible to implement the inheritance of the
> mixin properties, this would be fabulous. Then I could get rid of all the
> manual mixins to all the classes where I need it. Or does this pose a
> performance problem?
>
> Best,
>
> Christian
>
>
>> Hi Christian,
>>
>> thank you for your feedback and your former work. Really appreciated.
>> This seems to be a bug inside our property system. Each class remembers
>> if the properties have been attached to a class. This way we reduce the
>> overhead at class instantiation. However this makes it currently
>> impossible to adding properties to classes which have at least one
>> instance. I will try to fix this ASAP.
>>
>> Cheers,
>>
>> Sebastian
>>
>>
>>
>> Christian Boulanger schrieb:
>>> OK - I found it out - maybe obvious, but wasn't for me:
>>>
>>> qx.Class.include() needs to be called BEFORE the class is instantiated
>>> for the first time. The problem in my code was that the classes had been
>>> used previously.
>>>
>>> So what I gathered is that the property system of qooxdoo is
>>> FUNDAMENTALLY different from the normal javascript prototype-based
>>> property inheritance, and that mixins at runtime are much more complex
>>> that simply attaching methods to the prototype.
>>>
>>> I hope I'll have the time to write a short notice on this in the wiki.
>>>
>>> Cheers,
>>>
>>> Christian
>>>
>>> Christian Boulanger schrieb:
>>>> Very very strange behaviour:
>>>>
>>>> var log= qx.log.Logger.ROOT_LOGGER;
>>>> log.setMinLevel(qx.log.Logger.LEVEL_ALL);
>>>>
>>>> qx.Class.include(qx.ui.basic.Atom,qx.io.databinding.MDataManager);
>>>> qx.Class.include(qx.ui.basic.Label,qx.io.databinding.MDataManager);
>>>> qx.Class.include(qx.ui.form.List,qx.io.databinding.MDataManager);
>>>>
>>>> qx.Class.include(qx.ui.form.TextField,qx.io.databinding.MDataManager);
>>>>
>>>> var at = new qx.ui.basic.Atom;
>>>> var la = new qx.ui.basic.Label;
>>>> var li = new qx.ui.form.List;
>>>> var tf = new qx.ui.form.TextField;
>>>>
>>>> log.info ("qx.ui.basic.Atom.getDataBinding: " +
>>>> at.getDataBinding);
>>>> log.info ("qx.ui.basic.Label.getDataBinding: " +
>>>> la.getDataBinding);
>>>> log.info ("qx.ui.form.List.getDataBinding: " +
>>>> li.getDataBinding);
>>>> log.info ("qx.ui.form.TextField.getDataBinding: " +
>>>> tf.getDataBinding);
>>>>
>>>>
>>>> INFO: root: qx.ui.basic.Atom.getDataBinding: undefined
>>>> INFO: root: qx.ui.basic.Label.getDataBinding: undefined
>>>> INFO: root: qx.ui.form.List.getDataBinding: function () { return
>>>> qx.core.Property.executeOptimizedGetter(this, clazz, name, "get"); }
>>>> INFO: root: qx.ui.form.TextField.getDataBinding: undefined
>>>>
>>>> So the mixin seems to "stick" only to the qx.ui.form.List, but to none
>>>> of the other classes. Does anyone have an explanation?
>>>>
>>>> Christian
>>>>
>>>>
>>>>
>>>> Christian Boulanger schrieb:
>>>>
>>>>> Very interesting:
>>>>>
>>>>> qx.Class.include(qx.ui.form.List,qx.io.databinding.MDataManager);
>>>>>
>>>>> qx.Class.include(qx.ui.basic.Label,qx.io.databinding.MDataManager);
>>>>>
>>>>> var li = new qx.ui.form.List;
>>>>> var la = new qx.ui.basic.Label;
>>>>>
>>>>> qx.core.Log.error ("qx.ui.form.List.getDataBinding: " +
>>>>> li.getDataBinding);
>>>>> qx.core.Log.error ("qx.ui.basic.Label.getDataBinding: " +
>>>>> la.getDataBinding);
>>>>>
>>>>> results in:
>>>>>
>>>>> qx.ui.form.List.getDataBinding: function () { return
>>>>> qx.core.Property.executeOptimizedGetter(this, clazz, name, "get"); }
>>>>> qx.ui.basic.Label.getDataBinding: undefined
>>>>>
>>>>> this looks very sophisticated! However, why is
>>>>> qx.ui.basic.Label.getDataBinding undefined when
>>>>> qx.ui.form.List.getDataBinding has been correctly set?
>>>>>
>>>>> C.
>>>>>
>>>>>
>>>>> Christian Boulanger schrieb:
>>>>>
>>>>>
>>>>>> Here is something I don't understand:
>>>>>>
>>>>>> qx.Class.include(qx.ui.form.List,qx.io.databinding.MDataManager);
>>>>>> for (var i in qx.ui.form.List)
>>>>>> qx.core.Log.error(i + ": " + qx.ui.form.List[i]);
>>>>>>
>>>>>> I get the following list:
>>>>>>
>>>>>> $$original: function () { <snip/>}
>>>>>> classname: qx.ui.form.List
>>>>>> name: anonymous
>>>>>> basename: List
>>>>>> toString: function () { return "[Class " + this.classname + "]"; }
>>>>>> prototype: [object qx.ui.form.List]
>>>>>> superclass: [Class qx.ui.layout.VerticalBoxLayout]
>>>>>> constructor: [Class qx.ui.form.List]
>>>>>> $$destructor: function () { this._disposeObjects("_manager"); }
>>>>>> $$properties: [object Object]
>>>>>> $$includes: [Mixin qx.io.databinding.MDataManager]
>>>>>> $$flatIncludes: [Mixin qx.io.databinding.MDataManager]
>>>>>>
>>>>>> I am always amazed and surprised once I dive into the internals of
>>>>>> qooxdoo... where are all the getter and setter methods here? why
>>>>>> don't
>>>>>> they show up if I do a "for (.. in..)" loop?
>>>>>>
>>>>>> C.
>>>>>>
>>>>>>
>>>>>> Christian Boulanger schrieb:
>>>>>>
>>>>>>
>>>>>>
>>>>>>> Any ideas about this problem? At the moment I am not even getting
>>>>>>> the
>>>>>>> first option working, so everything might be a problem of my code.
>>>>>>> Has
>>>>>>> anyone else ever combined mixins and inheritance? Thanks, C.
>>>>>>>
>>>>>>> Christian Boulanger schrieb:
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>> if I am including the mixin like so:
>>>>>>>>
>>>>>>>>
>>>>>>>> qx.Class.include(qx.ui.basic.Label,qx.io.databinding.MDataManager);
>>>>>>>>
>>>>>>>> everything works. However, trying to achieve the same with
>>>>>>>>
>>>>>>>>
>>>>>>>> qx.Class.include(qx.core.Target,qx.io.databinding.MDataManager);
>>>>>>>>
>>>>>>>> fails. It seems I have to manually include the mixin into each
>>>>>>>> class I
>>>>>>>> want to use it with.
>>>>>>>>
>>>>>>>> No messages in the debug log.
>>>>>>>>
>>>>>>>> It would be great if this could be fixed.
>>>>>>>>
>>>>>>>> Thanks,
>>>>>>>>
>>>>>>>> Christian
>>>>>>>>
>>>>>>>>
>>>>>>>>
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