I am making a simple game and want to send a signal from my Game class to my MainWindow. My signal and slot share the same parameter but I can’t connect them. I have tried sending very simple signals with a dummy variable but failed to connect. The code is as follows.
game.h
class Game : public QObject
{
Q_OBJECT
public:
Game();
signals:
void test(int l);
MainWindow.h
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
MainWindow(QWidget *parent = nullptr);
~MainWindow();
public slots:
void testSlot(int l);
game.cpp
void someFunction(){
emit test(2);
}
MainWindow.cpp
MainWindow::MainWindow(QWidget *parent)
: QMainWindow(parent)
, ui(new Ui::MainWindow),
g{new Game()}
{
ui->setupUi(this);
g->gameLoop();
connect(g,&Game::test,this,&MainWindow::testSlot);
}
How can I get the signals and slots to connect properly? Thank you in advance.
>Solution :
I think the problem may be in the fact that you have g->gameLoop(); BEFORE the connect. If your someFunction is called from the gameLoop, then the connect is performed only after the game has finished and after the execution returns from the gameLoop(). But of course it’s just guessing. I wouldn’t expect to see ‘gameLoop’ called from the Window’s constructor so.. it looks odd as well. Other than that, it looks fine, so if my guess is not correct, then probably the problem lies elsewhere in the code we don’t see.