Suggestion - make exposing Delphi objects to python painless by utilizing the new RTTI feature in D2010 (and above)

[GoogleCodeExporter]

Hi,

I've a suggestion - make exposing Delphi objects to python painless by 
utilizing the new RTTI (runtime type information) feature in D2010 (and above).

Currently exposing a class to the hosted Python code needs to you to write too 
much code (check demo06), I guess if we take advantage of the new RTTI feature 
in the newer versions of Delphi, the process can be improved a lot.

For example, check out the Delphi chromium embedded project, all you have to do 
to expose the interface of any Delphi class to the JavaScript environment, is 
to register the class:

// this is your class exposed to JS 
  Test = class 
    class procedure doit(const v: string); 
  end; 

initialization 
// Register your class 
  TCefRTTIExtension.Register('app', Test);

// and in JavaScript code to call that class above:
app.doit(''foo'')', '', 0); 

Cool! Isn't it?

The above code was extracted from: 
http://groups.google.com/group/delphichromiumembedded/browse_thread/thread/1793e
7ca66012f0c/8ab31a5ecdb6bf48?lnk=gst&q=JavaScript+return+#

Some intro about RTTI introduced since D2010:
http://robstechcorner.blogspot.com/2009/09/delphi-2010-rtti-basics.html

Original issue reported on code.google.com by [email protected] on 29 Oct 2011 at 8:50

[GoogleCodeExporter]

Issue 18 has been merged into this issue.

Original comment by pyscripter on 2 Nov 2011 at 1:45

[GoogleCodeExporter]

Have you looked into WrapDelphi and the relevant demos?  This is exactly what 
WrapDelphi does, although it does not use the improvements in RTTI since Delphi 
2009.  However it does make it very easy to expose Delphi objects to Python.

Original comment by pyscripter on 8 Nov 2011 at 9:27

[GoogleCodeExporter]

Thanks for the hint! It's much easier then Demo08.

Original comment by [email protected] on 10 Nov 2011 at 1:21

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I've changed wrapdelphi.pas to use TRttiContext when delphi version is 
DELPHIXE_OR_HIGHER. How I can contribute with this project?

Original comment by [email protected] on 28 Jan 2012 at 4:52

Attachments:

• WrapDelphi.pas

[GoogleCodeExporter]

Thanks, I will review the changes and merge them.

Original comment by pyscripter on 28 Jan 2012 at 4:43

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Now, python code like "Form1.Memo1.Lines.Add('New line')" is working!
But "print Form1.Memo1.Text" is not working.
Please add 'tkUString' to line 1551.

Original comment by [email protected] on 4 Feb 2012 at 10:12

[GoogleCodeExporter]

Sounds great!

Original comment by [email protected] on 5 Mar 2012 at 9:00

[GoogleCodeExporter]

@ pyscripter, 

Have you merged WrapDelphi.pas by Alexandre into the python4delphi project 
already? Thanks!

Original comment by [email protected] on 26 May 2012 at 8:53