[erlang-questions] Background wx_object set_id/2

[Frans Schneider]

Thanks Dan, clear now. Somehow the mentioning of setting a controlling 
process in the documentation made me expect something more magic.

Frans

On 08/06/2018 03:27 PM, Dan Gudmundsson wrote:
> On Mon, Aug 6, 2018 at 2:56 PM Frans Schneider <fchschneider@REDACTED 
> <mailto:fchschneider@REDACTED>> wrote:
> 
>     I am not really sure I get the full picture yet. So, it is not
>     tinkering
>     with the wx_object process itself but just sets an attribute in the
>     data
>     structure of the wxWidget object?
> 
> 
> Yes
> 
>     But why are the wx_object functions
>     stop, call and cast using that Pid than?
> 
> 
> I don't think I understand the question, stop, call and cast needs to 
> know which pid to send the messages to.
> 
> Normally the pid attribute is set in wx_object init before it is 
> returned to the user.
> 
> But if you get the wxWidget object via another call to wx the pid 
> attribute may not be set, and this gave an option to associate the pid 
> with the wxWidgets object without tinkering with internal opaque record.
> 
> I needed to set it somewhere/sometime and added the function so I could 
> keep the record definition internal to wx.
> 
> /Dan
> 
> 
>     Frans
> 
>     On 08/06/2018 02:29 PM, Dan Gudmundsson wrote:
>      > If you use wx_object module the pid is used to access the
>     corresponding
>      > erlang process/server.
>      >
>      > If you fetch the "object" from wxWidgets for example
>      > from Parent = wxWindow:getParent(Window) you will get an object
>     without
>      > the pid set and you can manually set it with wx_object:set_pid/2.
>      >
>      > /Dan
>      >
>      > On Mon, Aug 6, 2018 at 1:42 PM Frans Schneider
>     <fchschneider@REDACTED <mailto:fchschneider@REDACTED>
>      > <mailto:fchschneider@REDACTED <mailto:fchschneider@REDACTED>>>
>     wrote:
>      >
>      >     Dear list,
>      >
>      >     I am wondering what purpose the wx_object:set_pid/2 function
>     serves?
>      >     Why
>      >     would one use this?
>      >
>      >     Thanks,
>      >
>      >     Frans
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