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David de Argentina
NeoBooker
Joined: 04 Apr 2005
Posts: 930
Location: Buenos Aires, Argentina
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 Posted: Mon Feb 08, 2010 2:26 pm Post subject: NBInterface Question |
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Hi Dave,
I'm trying to work with the NBInterface feature within my plugins.
For general rule, I use this:
a) there are some interfaces that not use Data or send NIL Data: basically the interfaces that open some dialogs like Action Editor or Color Selector. The SDK Help file shows something like this:
| Code: | VAR Data : PCHAR;
BEGIN
Data := NIL;
nbInterface( 3, Data );
ShowMessage( StrPas( Data ) );
FreeStr( Data );
END;
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b) There are some interfaces that must use any kind of Data, Like the object selector editor (Interface 1) or the Interface to get the window handle of any object (Interface 7). The SDK Help file shows something like this: | Code: | VAR Data : PCHAR;
BEGIN
SetStr( Data, 'ObjectType=2' );
nbInterface( 1, Data );
ShowMessage( StrPas( Data ) );
FreeStr( Data );
END;
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Ok. When Interface does not use Data, PowerBasic convertion code works fine.
But, when interface uses some kind of Data, I don't find the way to send this data in order to retreive Interface actions.
I understand SetStr function is used to inform to NeoBook main enviroment of develop, the contents of some values on edition time, but on this samples I don't understand the difference between this:
SetStr( Data, 'ObjectType=2' );
nbInterface( 1, Data );
and this:
Data:="ObjectType=2";
nbInterface( 1, Data );
In order to set PowerBasic code properly.
Are there any C (or C++) sample that uses this interfaces in order to try to learn the correct way to use this ?
Thanks in advance,
David de Argentina |
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Neosoft Support
NeoSoft Team
Joined: 31 Mar 2005
Posts: 4058
Location: Oregon, USA
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| Posted: Tue Feb 09, 2010 11:36 am Post subject: |
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Since a plug-in is a type of DLL, any string information passed to NeoBook must be in the form of a pointer. The SetStr procedure allocates memory for the Data PCHAR and copies the string into it. The PCHAR is then passed to the nbInterface procedure. NeoBook may modify the PCHAR and return it to the plug-in. Finally, the plug-in calls FreeStr to release the memory allocated for the PCHAR.
If part of this isn't working with PowerBasic, then you may want to look at the SetStr procedure (part of the plug-in template) and see if it needs any modification. I'm sorry, I am not a PowerBasic programmer.
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