wxlua-users

[Wxlua-users] Native callbacks in wxLua?

[Chris M. <ch...@ma...>]

A while ago, John and I discussed the changes I made to the older 
version of wxLua I was using. My big issue was being able to run the 
wxApp event loop in a separate thread from Emma. Because of this I could 
not call Lua functions that had been connected because they would run in 
the wrong thread. So I came up with a native callback mechanism. This 
basically used the same Connect() model that wxLua uses, but it uses a 
form that registers a C++ callback rather than a Lua function. wxLua 
would call this callback and my native function would send a message to 
the thread running the Lua interpreter to execute the Lua function.

All this inter-thread comm is done in my app, so all wxLua needs is the 
ability to register native callbacks. I discussed adding this to this 
latest incarnation of wxLua with John. It does not look like that was 
ever added.

John, any resolution on adding this? If there is still interest, I will 
switch over to your version of wxLua, make my changes there and make 
them available to you. My goal, of course, is to use a stock version of 
wxLua!

Let me know, thanks...

-- 
chris marrin                ,""$,
ch...@ma...          b`    $                             ,,.
(650) 941-9040          mP     b'                            , 1$'
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  ```"```'"    `"`         `""`        ""`                          ,P`
"As a general rule,don't solve puzzles that open portals to Hell"'

Re: [Wxlua-users] Native callbacks in wxLua?

[John L. <jla...@gm...>]

On 1/8/06, Chris Marrin <ch...@ma...> wrote:
>
> A while ago, John and I discussed the changes I made to the older
> version of wxLua I was using. My big issue was being able to run the
> wxApp event loop in a separate thread from Emma. Because of this I could
> not call Lua functions that had been connected because they would run in
> the wrong thread. So I came up with a native callback mechanism. This
> basically used the same Connect() model that wxLua uses, but it uses a
> form that registers a C++ callback rather than a Lua function. wxLua
> would call this callback and my native function would send a message to
> the thread running the Lua interpreter to execute the Lua function.
>
> All this inter-thread comm is done in my app, so all wxLua needs is the
> ability to register native callbacks. I discussed adding this to this
> latest incarnation of wxLua with John. It does not look like that was
> ever added.

I think, if I understand correctly, that the same can be implemented
by just making the wxLuaCallback::CallFunction virtual
(modules/wxlua/include/wxlcallb.h). In your program you will have your
own ConnectEvent function, similar to the one you added in
wxLuaInternals.cpp, but instead you'll create a new wxMyLuaCallback
class with CallFunction overridden to do as you please. Does this
sound like it'll work? There's nothing wrong with your method, but I
think just making wxLuaCallback::CallFunction virtual is a little
cleaner and simpler, but maybe it's not workable for you?

> John, any resolution on adding this? If there is still interest, I will
> switch over to your version of wxLua, make my changes there and make
> them available to you. My goal, of course, is to use a stock version of
> wxLua!

I hope I can help and we can get this to work. I'll have some time
tonight to fix the linking problem that Klaas was having.

Regards,
    John Labenski

Re: [Wxlua-users] Native callbacks in wxLua?

[Chris M. <ch...@ma...>]

John Labenski wrote:
> On 1/8/06, Chris Marrin <ch...@ma...> wrote:
> 
>>A while ago, John and I discussed the changes I made to the older
>>version of wxLua I was using. My big issue was being able to run the
>>wxApp event loop in a separate thread from Emma. Because of this I could
>>not call Lua functions that had been connected because they would run in
>>the wrong thread. So I came up with a native callback mechanism. This
>>basically used the same Connect() model that wxLua uses, but it uses a
>>form that registers a C++ callback rather than a Lua function. wxLua
>>would call this callback and my native function would send a message to
>>the thread running the Lua interpreter to execute the Lua function.
>>
>>All this inter-thread comm is done in my app, so all wxLua needs is the
>>ability to register native callbacks. I discussed adding this to this
>>latest incarnation of wxLua with John. It does not look like that was
>>ever added.
> 
> 
> I think, if I understand correctly, that the same can be implemented
> by just making the wxLuaCallback::CallFunction virtual
> (modules/wxlua/include/wxlcallb.h). In your program you will have your
> own ConnectEvent function, similar to the one you added in
> wxLuaInternals.cpp, but instead you'll create a new wxMyLuaCallback
> class with CallFunction overridden to do as you please. Does this
> sound like it'll work? There's nothing wrong with your method, but I
> think just making wxLuaCallback::CallFunction virtual is a little
> cleaner and simpler, but maybe it's not workable for you?

I have no problem with subclassing, as long as I also override, for 
instance, wxCallback::CallFunction() as well. Then I can override it.

-- 
chris marrin                ,""$,
ch...@ma...          b`    $                             ,,.
(650) 941-9040          mP     b'                            , 1$'
M1      ,.`           ,b`    ,`                              :$$'
      ,|`             mP    ,`                                       ,mm
    ,b"              b"   ,`            ,mm      m$$    ,m         ,`P$$
   m$`             ,b`  .` ,mm        ,'|$P   ,|"1$`  ,b$P       ,`  :$1
  b$`             ,$: :,`` |$$      ,`   $$` ,|` ,$$,,`"$$     .`    :$|
b$|            _m$`,:`    :$1   ,`     ,$Pm|`    `    :$$,..;"'     |$:
P$b,      _;b$$b$1"       |$$ ,`      ,$$"             ``'          $$
  ```"```'"    `"`         `""`        ""`                          ,P`
"As a general rule,don't solve puzzles that open portals to Hell"'