c++ - QObject::moveToThread: Widgets cannot be moved to a new thread -

my ide qt 5.0.1, platform linux

i have problem set widgets window.(my opinion)

this main.cpp->

int main(int argc, char *argv[]) {     qapplication a(argc, argv);      qthread cthread;      mainwindow w;      w.dosetup(cthread);     w.movetothread(&cthread);      cthread.start();      if(cthread.isrunning())     {         qdebug() << " thread running...";     }       w.show();      return a.exec(); } 

this dosetup() method->

void mainwindow::dosetup(qthread &mainthread) {     qobject::connect(&mainthread, &qthread::started, this, &mainwindow::activeloopmainc); } 

i checked signal-slot mechanism , works.

slot method->

void mainwindow::activeloopmainc() {     qdebug() << " signal-slot structure working successfully..";     mainthreadproc((void*)(instaddr)); } 

i call function main.c slot method.

in debugging there no problem working codes. window blank. there frame.

i receive error message: qobject::movetothread: widgets cannot moved new thread

how can solve problem?

thank in advance answers.

you can't move widgets thread - in order keep user interface responsive, qt needs gui work inside main thread.

if have background work do, move background worker other thread, , not user interface.