Ok this is quite a noob question, I know. I have made this
constructor of mainwindow.cpp:
Qt Code: 
  1. (void) new QShortcut(Qt::ALT + Qt::Key_1, this, SLOT(show_m(0)));
  2.     (void) new QShortcut(Qt::ALT + Qt::Key_2, this, SLOT(show_m(1)));
  3.     (void) new QShortcut(Qt::ALT + Qt::Key_3, this, SLOT(show_m(2)));
  4.     (void) new QShortcut(Qt::ALT + Qt::Key_4, this, SLOT(show_m(3)));
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well, the slot show_m(int) looks like:
Qt Code: 
  1. int MainWindow::show_m(int a)
  2. {
  3. ui->tabWidget->setCurrentIndex(a);
  4. }
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As you may understand, I want by pressing Alt+1/2/3/4 to navigate through the tabs. I don't get compile error but output error:
Qt Code: 
  1. Object::connect: No such slot MainWindow::show_m(0) in megauploadMain.cpp:102
  2. Object::connect:  (receiver name: 'MainWindow')
  3. Object::connect: No such slot MainWindow::show_m(1) in megauploadMain.cpp:103
  4. Object::connect:  (receiver name: 'MainWindow')
  5. Object::connect: No such slot MainWindow::show_m(2) in megauploadMain.cpp:104
  6. Object::connect:  (receiver name: 'MainWindow')
  7. Object::connect: No such slot MainWindow::show_m(3) in megauploadMain.cpp:105
  8. Object::connect:  (receiver name: 'MainWindow')
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Thx in advance for any replies!