[erlang-bugs] wxNotebook and wx_object

[Mazen Harake]

Any news on this? Is the pattern match going to be removed?

I had a look at gen_server, and that doesn't have a pattern match. Just 
wanted to know because otherwise I will have to work around it because 
currently I'm working with a hacked wx_object :)

Cheers,

/Mazen

Mazen Harake wrote:
> Hi,
>
> Thanks for the reply, I agree that one shouldn't depend on that 
> behaviour, that is why I don't, but now at least I know it is not an 
> erlang "bug" per se.
>
> /Mazen
>
>
> Dan Gudmundsson wrote:
>> Hi
>>
>> wx(Erlang) is just an erlang port of wxWidgets, it marshals the 
>> arguments and
>> make the corresponding C++ calls and so it behaves exactly the same 
>> as the
>> original wxWidgets.
>>
>> Thus since wxWidgets is coded in C++ everything in wx starts from 0 
>> and not 1.
>>
>> I can't answer the first question since it's not a feature of wxErlang
>> you have to
>> send those kind of questions to wxWidgets list, I'm no expert of the
>> implementation
>> of wxWidgets.
>>
>> Also I don't think you can depend on that behavior (unless it's
>> documented) for all
>> platforms.
>>
>> Question 2, is should mimic the gen_server behavior, I'll have a look
>> how it's handled
>> there.
>>
>> /Dan
>>
>> On Sun, Sep 27, 2009 at 11:41 AM, Mazen Harake
>> <mazen.harake@REDACTED> wrote:
>>  
>>> Hi,
>>>
>>> Before I post a patch to erlang-patches I was just wondering if it 
>>> these two
>>> things are intended behaviour:
>>>
>>> 1) If I add  a Panel to Notebook (as a page) and then destroy the 
>>> Panel, I
>>> can then ask for the panel on the same index (wxNotebook:getPage/2) 
>>> and get
>>> a different panel. further more, if I have added a panel and then 
>>> ask for an
>>> index outside of the number of panels I get a new Panel which I never
>>> created. Also, why does the page index start at 0 when everything 
>>> else in
>>> Erlang is 1 based (pretty much).
>>>
>>> E.g:
>>> Nb = wxNotebook:new(Parent, ?wxID_ANY, []),
>>> Panel = wxPanel:new(),
>>> wxNotebook:addPage(Nb, Panel, "Whatever", []), %% this is the first 
>>> page
>>> added
>>> P1 = wxNotebook:getPage(Nb, 0), %% this gives the first page added 
>>> (Panel),
>>> PUnknown = wxNotebook:getPage(Nb, 1), %% this gives a new page... why?
>>> shouldn't it crash or something?
>>> wxPanel:destroy(Panel), %% delete the panel
>>> P2 = wxNotebook:getPage(Nb, 0),
>>> %% P1 /= P2 /= PUnknown
>>>
>>> Is this intended behaviour? I don't have a patch for this because I 
>>> don't
>>> know what is expected
>>>
>>> 2) firstly, when calling wx_object:start_link/X and returning {stop,
>>> whatever} it exits the process. Why?
>>> second, it patternmatches the return value (from the ack) to {ok, Pid},
>>> again: Why? This causes the return value to exit with badmatch, I'm 
>>> sure
>>> that is not intended? Or is it?
>>>
>>> /Mazen
>>>
>>> ________________________________________________________________
>>> erlang-bugs mailing list. See http://www.erlang.org/faq.html
>>> erlang-bugs (at) erlang.org
>>>
>>>
>>>     
>
>
> ________________________________________________________________
> erlang-bugs mailing list. See http://www.erlang.org/faq.html
> erlang-bugs (at) erlang.org
>