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Re: [Stellarium-pubdevel] Plugin / slots question.
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From: Steve I. <st...@in...> - 2008-07-23 09:52:30
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Hi again Fabien,
I checked and the appropriate lines were already there (I used the
HelloStelModule files and changed for my filenames):
# Add here all the files which require moc compilation
# that is, all the headers with SIGNAL/SLOTS/PLUGIN_INTERFACE etc..
SET(ScanDisplayModule_MOC_HDRS
ScanDisplayModule.hpp)
# After this call, ScanDisplayModule_MOC_SRCS = moc_ScanDisplayModule.cxx
QT4_WRAP_CPP(ScanDisplayModule_MOC_SRCS ${ScanDisplayModule_MOC_HDRS})
I ran cmake and rebuilt again but it hasn't made any difference :(
Back to square one...
Best regards,
Steve
-----Original Message-----
From: ste...@li...
[mailto:ste...@li...] On Behalf Of
Steve Ingamells
Sent: 23 July 2008 10:40
To: 'Fabien Chéreau'; 'Stellarium developers public mailing list'
Subject: Re: [Stellarium-pubdevel] Plugin / slots question.
Hello Fabien,
Thank you very much for that information - I will try that and let you know!
All the best,
Steve
(learning more about QT than I ever wanted!)
-----Original Message-----
From: Fabien Chéreau [mailto:fab...@go...]
Sent: 23 July 2008 10:15
To: St...@in...; Stellarium developers public mailing list
Subject: Re: [Stellarium-pubdevel] Plugin / slots question.
Hi Steve,
You have to include the "ScanDisplayModule.hpp" file into the
src/CMakeList.txt in the section were you declare the file to be
preprocessed by the moc compiler.
For example in HelloStelModule, this is done with the following lines:
# Add here all the files which require moc compilation # that is, all the
headers with SIGNAL/SLOTS/PLUGIN_INTERFACE etc..
SET(HelloStelModule_MOC_HDRS
HelloStelModule.hpp MyFile2.hpp)
# After this call, HelloStelModule_MOC_SRCS = moc_HelloStelModule.cxx
QT4_WRAP_CPP(HelloStelModule_MOC_SRCS ${HelloStelModule_MOC_HDRS})
You'll have to add each files which contain a class using Q_OBJECT macro in
this section.
Cheers,
Fabien
On Wed, Jul 23, 2008 at 11:05 AM, Steve Ingamells <st...@in...>
wrote:
> Hello again, gentlemen..
>
> I have a strange problem with my plug-in. I realise this is probably a
> QT matter rather than Stellarium as such, but as you are the only
> bunch of experienced QT programmers I know, I figured I would ask here
first!
>
> Platform: Windows XP, build environment is MSYS, set up as per wiki
> instructions.
>
> I want to use a QTimer to trigger data updates from my Stallarium
> plug-in to our server. So I read up on timers, slots and signals.
>
> I added the Q_OBJECT macro to the main class in the plug-in:
>
> ////////////////////
> class ScanDisplayModule : public StelModule {
>
> Q_OBJECT;
>
> public:
> ScanDisplayModule();
> virtual ~ScanDisplayModule();
>
> ////////////////////
>
> and also added a blank slot function
>
> ///////////////////
>
> public slots:
> void onTimer();
>
> ///////////////////
>
> with an empty function in the cpp file. The Qtimer is not yet coded,
> so it's just a skeleton.
>
> It compiles and links fine - I get link info messages:
>
> Linking CXX shared module libScanDisplayModule.dll
> Info: resolving StelApp::singleton by linking to
> __imp___ZN7StelApp9singletonE (auto-import)
> Info: resolving vtable for StelModuleby linking to
> __imp___ZTV10StelModule
> (auto-import)
> Info: resolving StelModule::staticMetaObject by linking to
> __imp___ZN10StelModule16staticMetaObjectE (auto-import) [100%] Built
> target ScanDisplayModule
>
> (the last link info message started to appear after adding the
> Q_OBJECT
> macro)
>
> but when I run Stellarium with the plug-in all set-up, I get the
following:
>
> Couldn't load the dynamic library:
> "./modules/ScanDisplayModule/libScanDisplayM
> odule.dll" : "QLibrary::load_sys: Cannot load C:/Program
> Files/Stellarium/modul es/ScanDisplayModule/libScanDisplayModule.dll
> (Invalid access to memory location .)"
> Module "ScanDisplayModule" will not be loaded.
>
> The problem seems to be the Q_OBJECT macro - it's needed to support
> slots, but with the macro in the header (even with the slots functions
> removed) I get the error loading the DLL.
>
> If I remove the Q_OBJECT macro and the slots code, it works fine.
>
> I have looked at the code in VirGO and you are using slots and the
> Q_OBJECT macro there, so I believe it will work, unless it's a Windows
problem.
>
> Any ideas?
>
> Thanks,
> Steve Ingamells
>
>
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