Sort QList in another thread

ranger0

Hi guys,

I'd like to sort a QList in another thread.

My first try was using QtConcurrent::run() function, like this:

@
QFuture<void> classificando = QtConcurrent::run(qStableSort,classificar);
@

I got:

....\complementos\matriz.cpp: In member function 'void matriz::classifica(int, Qt::SortOrder)':
....\complementos\matriz.cpp:55: error: no matching function for call to 'run(<unresolved overloaded function type>, QList<QPair<QString, unsigned int> >&)'
mingw32-make.exe[1]: Leaving directory `C:/Users/rangel/Documents/Programas/Laboratorio/Principal/LIMS/cadastro/cliente-build-desktop-Qt_4_8_1_for_Desktop_-_MinGW__Qt_SDK__Debug'
mingw32-make.exe[1]: *** [debug/matriz.o] Error 1
mingw32-make.exe: *** [debug] Error 2
09:10:09: The process "C:\QtSDK\mingw\bin\mingw32-make.exe" exited with code 2.
Error while building project cliente (target: Desktop)
When executing build step 'Make'

Does anyone could help me?

Thanks.

mcosta

Hi,

the compiler say you it doesn't resolve first parameter of QtConcurrent::run().
Are you sure qStableSort header <QtAlgorithm> is included?

qStableSort accept as parameter two iterators and not collection.

ranger0

Hi mcosta,

Yes. I'm sure I included QtAlgorithm.

I use this function with a collection and it works in GUI thread.

SGaist

Hi,
If i'm not mistaken, qStableSort is an inline template function and if IIRCC, using a template function is not directly supported with run (But I may be wrong).

However, using a wrapper function, you can achieve what you want:

@
#include <QtConcurrentRun>

typedef QList<QPair<QString, unsigned int> > MyContainer; // Just to have simpler code

void stableSortWrapper(MyContainer &list) {
qStableSort(list);
}

void MyStartingFunction()
{
MyContainer classificar;
QFuture<void> classificando = QtConcurrent::run(stableSortWrapper, classificar);
}
@

Hope it helps