[gme-users] Component: saving project, modifying, reopening

[Peter Volgyesi]

It is (almost) possible what you are asking for.
One limitation: you cannot "replace" the current mga project with another
one in your interpreter. I suggest you to export and re-import the model
database. The benefits are:
- it is working
- your external program can work on a standard xml file
drawbacks:
- the import function is additive: you might have to delete the "old"
objects in your interpreter "manually".

Here are the steps (creating a plug-in is preferable):
1., create a new BON2 plug-in (CreateNewComponent.exe)

2., please, modify the ComponentLib.idl file, and include an additional
interface module:
...
#include PATH(/Interfaces/gme.idl)
#include PATH(/Interfaces/parser.idl)   <- insert this line

3., unfortunately, you will have to modify the parser.idl file (in the
interfaces folder), because of a small bug in it (starting from the next GME
release, this modification will be there):

#ifndef MGAIDL_IMPORTED   <------
import "Mga.idl";
#endif                    <------ Insert these two preproc. lines 

4., here is the export/re-import code that you might copy into your
component (eg.: Component::invokeEx(...)):

	CComPtr<IMgaProject> mgaProject = project->getProjectI();
	ASSERT(mgaProject);

	CComPtr<IMgaTerritory> terr;
	COMTHROW( mgaProject->get_ActiveTerritory(&terr));
	ASSERT(terr);

	try {
		COMTHROW( mgaProject->CommitTransaction() );
		
		CComPtr<IMgaDumper> dumper;
		COMTHROW(dumper.CoCreateInstance(OLESTR("Mga.MgaDumper")));
		ASSERT(dumper);

		CComBSTR tmpFileName("C:\\Temp\\project.xme");
		COMTHROW(dumper->DumpProject(mgaProject, tmpFileName));

		// Run your external tool on tmpFileName
		// ...

		CComPtr<IMgaParser> parser;
		COMTHROW(parser.CoCreateInstance(OLESTR("Mga.MgaParser")));
		ASSERT(parser);

		COMTHROW(parser->ParseProject(mgaProject, tmpFileName));
		
		COMTHROW( mgaProject->BeginTransaction(terr) );
	} 
	catch (BON::Exception&) {
		AfxMessageBox("Something went wrong...");
	}

--
peter

> -----Original Message-----
> From: gme-users-bounces at list.isis.vanderbilt.edu 
> [mailto:gme-users-bounces at list.isis.vanderbilt.edu] On Behalf 
> Of Gabriele Trombetti
> Sent: Friday, June 11, 2004 9:57 PM
> To: gme-users
> Subject: [gme-users] Component: saving project, modifying, reopening
> 
> Hi all,
> I need to create a plugin or an addon or interpreter, or whatever.... 
> preferably having an icon in the topright corner of GME.
> 
> Such component would need to work with models of only one 
> paradigm (simplyfying hypotesis... maybe).
> 
> When the user runs it, I need to:
> somehow get the mga filename which is currently open in GME 
> then save the current project (into that mga file) than 
> perform some modification onto that mga project file 
> (modifications made by launching an external exe onto it) 
> then opening that file again into the same instance of GME 
> (having the effect of a refresh from disk)
> 
> 
> Is it possible to do this, or something near to this?
> 
> Would I need an add-on, a plugin or an interpreter?
> Which COM interfaces should I use?
> 
> Thanks in advance
> Gabriele
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