The remaining question I have is:
Why are callAsync() and addListener() doing this differently (except perhaps
for historical reasons)?
Wouldn't it be more consistent if both would have a scope parameter?
Of course, this would be a backward-incompatible change ...
Cheers,
Fritz
On Mon, 23 Nov 2009, Fabian Jakobs wrote:
> Hi Tobias,
>
> one solution to your problem is using qx.lang.Function.bind. With this
> function you can create a wrapped version of your method, which always
> executes with the same "this":
>
> callAsyncScoped(qx.lang.Function.bind(handler, this),arg1,arg2,....)
>
> best Fabian
>
>
>> While qooxdoo is hurling towards 1.0 there is this question that is
>> bugging me.
>>
>> I have learned, that using anonymous functions leads to grief when
>> debugging. So instead of
>>
>> server.callAsync(function(ret,exc,id){
>> \\ handler code
>> },arg1,arg2,arg3);
>>
>> I am writing
>>
>> function handler(ret,exc,id){
>> \\ handler code
>> }
>>
>> server.callAsync(handler,arg1,arg2,arg3);
>>
>> unfortunately handler runs out of scope. I can therefore not
>> access 'this' inside the handler. Unless I pass this into the
>> handler with the var that=this trick.
>>
>> It works fine but it makes it impossible (afaik) to setup handlers
>> as private methods in the object.
>>
>> In other methods like addListener it is possible to pass along the
>> scope the handler should be run in.
>>
>> I would realy like to see a callAsyncScoped call that works similar
>> to addListener:
>>
>> callAsyncScoped(handler,scope,arg1,arg2,....)
>>
>> cheers
>> tobi
>>
>>
>
>
>
--
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Schweiz web: www.oetiker.ch
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