Re: 回复：ConvertToSubClassCode for IDispatch

[Phil Thompson]

On 30/04/2023 16:10, ‪‪‪‪just_fancy at live.com‬‬‬‬ wrote:
> No, it's `typedef interface Foo Foo` and without further definition.
> It works for `open` I mean the returned foo, it could use as _Foo
> normally (_Foo contains methods).
> But I can't pass the foo returns from `open` to `dosomething` . It's
> actully a _Foo because I use ConvertToSubClassCode for `Foo`

"It works" means it compiles or it runs correctly?

Have you wrapped _Foo?

Phil

> -------- 原始邮件 --------
> 发件人： Phil Thompson <phil at riverbankcomputing.com>
> 日期： 2023年4月30日周日 22:27
> 收件人： Weitian Leung <Just_Fancy at live.com>
> 抄送： pyqt at riverbankcomputing.com
> 主 题： Re: ConvertToSubClassCode for IDispatch
> 
>> On 30/04/2023 14:39, Weitian Leung wrote:
>>> Hello,
>>> I have a IDispatch related sdk header, say it contains two
>>> IDispatch interfaces:
>>> ```
>>> interface _Foo : public IDispatch {…};
>>> typedef interface Foo Foo; // No definition at all
>>> ```
>> 
>> Do you mean...
>> 
>> typedef interface _Foo Foo;
>> 
>>> `Foo` can be QueryInterface from `_Foo` in C++ (or just do a
>> cast),
>>> and for this case I asume they are just the same class.
>>> 
>>> As the sdk internal only uses the Foo interface, such as:
>>> ```
>>> interface Bar : public IDispatch
>>> {
>>> bool open(…, Foo** out);
>>> void dosomething(Foo* f);
>>> };
>>> ```
>>> 
>>> So I use ConvertToSubClassCode to resolve the buggy sdk:
>>> ```
>>> class Foo /Abstract,NoDefaultCtors/
>>> {
>>> %ConvertToSubClassCode
>>> sipType = sipType__Foo;
>>> %End
>>> };
>>> ```
>> 
>> As Foo above doesn't have a super-class, and nothing sub-classes it,
>> the
>> %ConvertToSubClassCode isn't having any effect.
>> 
>>> It works for `open`, but not for `dosomething` due to
>>> ConvertToSubClassCode make `open` returns a `_Foo`, they have no
>>> inherits from python’s view.
>> 
>> Sorry, I don't understand what you mean. What do you mean by "it
>> works"?
>> 
>>> I can’ｔ change the C++ sdk as it out of my control．
>>> So is there any chance to make SIP works for such case?
>> 
>> Your example is too incomplete to say.
>> 
>> Phil