Command function doesn't get called [SOLVED]

On 23/03/2015 at 09:27, xxxxxxxx wrote:

User Information:
Cinema 4D Version:   R16 
Platform:      Mac OSX  ; 
Language(s) :     C++  ;


I'm working on an object-plugin. I have implemented the method Command, but it seems it doesn't get called. Here is my method:

Bool MyPluginData::Command(Int32 id, const BaseContainer &msg)
  if (id == HIPNULLPTR_POS_Y)
      GePrint("The slider is pressed!");

return true;

Did I do something wrong here? Or did I simply forget something?
I've looked for hours on the internet, in the SDK, but still found no answer.

Thanks for your help and time!
Casimir Smets

On 23/03/2015 at 11:46, xxxxxxxx wrote:

Mainly only buttons really trigger Command().  For other controls, you need to use Message().

On 23/03/2015 at 17:44, xxxxxxxx wrote:

And actually Command() is not a method of the ObjectData class, but GeDialog. If you want to notice
when a value was changed, override Message() and catch the MSG_DESCRIPTION_* message that
matches your needs.


On 24/03/2015 at 06:31, xxxxxxxx wrote:


Well, that did it, especially the MSG_DESCRIPTION. With my slider I needed the MSG_DESCRIPTION_CHECKUPDATE inside Message.

You can mark this as closed!!
Thanks for your help guys!! :)

Casimir Smets

On 24/03/2015 at 06:52, xxxxxxxx wrote:

Well, it worked when I had a simple GePrint. Now with some additional methods it doesn't work anymore.
Here is my code in Message:

      BaseObject* op = (BaseObject* )node;
      BaseDocument* doc = (BaseDocument* )data;
      EditHipNullptr(op, doc);
      GePrint("The slider is pressed! - CheckUpdate");

And the code from EditHipNullptr:

BaseObject* CharacterCreatorData::EditHipNullptr(BaseObject* op, BaseDocument* doc)
  BaseObject* hipNullPtr = doc->SearchObject("Hip_Nullptr");
  BaseContainer* bb = op->GetDataInstance();
  hipNullPtr->SetRelPos(Vector(0, bb->GetInt32(HIPNULLPTR_POS_Y), 0));
  return hipNullPtr;

When I change the slider in Cinema 4D, the application doesn't respond anymore.
Does somebody have an idea what could be the problem here?

Casimir Smets

On 24/03/2015 at 07:52, xxxxxxxx wrote:


the data of MSG_DESCRIPTION_CHECKUPDATE is not a BaseDocument but of the type DescriptionCheckUpdate. In that structure you will find a pointer to the document.

Also, you don't have any nullptr-checks in your code, so when SearchObject() fails it must crash.

Best wishes,

On 24/03/2015 at 08:10, xxxxxxxx wrote:

Hi Sebastian,

That did it! Thank you very much!
I also changed my method for nullptr-checks.
You can surely mark this as closed now!

Casimir Smets