c++ - MOC a lambda connection -

c++ - MOC a lambda connection -

i'd create connection so:

connect(mymap[myobjectname], &myobject::valuechanged, [&] (int value) { qstring objectname = sender()->objectname(); myothermap[objectname].setvalue(qvariant(value)); });

this doesn't work though because sender() can't invoked without function going through moc. thus, way create work (seemingly) using old signal/slot string based syntax.

however, things this qt blog create seem qt5 function pointer syntax should preferred on previous string syntax, i'm curious: there way moc lamda function, or there whole class of cases new syntax can't used?

use this (or other qobject) receiver create sender() method work:

connect(mymap[myobjectname], &myobject::valuechanged, this, [&] (int value) { qstring objectname = sender()->objectname(); myothermap[objectname].setvalue(qvariant(value)); });

or take @ qsignalmapper. looks fit scenario.

c++ qt lambda moc