[Qt-interest] Problems with template and function pointer

[qt at wachtler.de]

p()


On Thu, Nov 04, 2010 at 01:43:05PM +0100, mario wrote:
> Hi all,
> 
> I have some problem whit a QMap filled of funcion pointers:
> 
> My template should have a map of function pointers. Then I should be
> able to call a particular function, having a particular string...
> But I'm not able to do the "call".
> Any help?
> 
> This is a simple QT program:
> 
> template <typename T> class Module
> {
> public:
> 	typedef void (T::*memberPtr)(  );
> 	typedef QMap<QString, memberPtr> ModuleFunctMap;
> 
> 	Module(){}
> 
> 	void caller( const QString& functName) 	{
> 		if ( m_mFunctionMap.contains(functName)  ) {
> 
> 			memberPtr p = this->m_mFunctionMap[functName];
> 
> 			//now I have the pointer...
> 			//I should call it
> 			
> 			//but this is wrong
> 			(this->*p)();
> 
> 			//and this is wrong too
> 			Module<T>* inst = this;
> 			(inst->*p)();
> 		}
> 	}
> 
> 
> protected:
> 	ModuleFunctMap	m_mFunctionMap;
> };
> 
> 
> class ModuleTest :	public Module<ModuleTest>
> {
> public:
>     ModuleTest(  ) {
>         m_mFunctionMap["randomFunctioName"] = &ModuleTest::functionToCall;
>     }
> 
>     void functionToCall() {
>         qDebug() << "YEAH!";
>     }
> };
> 
> 
> int main(int argc, char *argv[])
> {
>     QCoreApplication a(argc, argv);
>     ModuleTest test;
>     test.caller("randomFunctioName");
>     return a.exec();
> }
> 
> 
> 
> 
> -- 
> Mario Signorino | www.sgrunt.net
> _______________________________________________
> Qt-interest mailing list
> Qt-interest at trolltech.com
> http://lists.trolltech.com/mailman/listinfo/qt-interest
> 

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