Problem with QTimer in QWidget not calling the function.

[AnthonyL]

Hi,

I am having some problems with a QTimer starting but not calling the function.

I have a window.cpp QWidget parented to the QApplication and a gamemanager.cpp QWidget parented to the window.cpp. The timer in the window.cpp file works but not the one in the gamemanager.cpp

Here is my main function:

#include "game_manager.h"
#include "window.h"
#include <QApplication>

int main(int argc, char** argv) {
    QApplication app(argc, argv);
    Window window;
    window.show();
    return app.exec();
}

The <window.h>

#include <QWidget>
#include <QTimer>
#include <QtDebug>
#include "game_manager.h"

class Window : public QWidget {
        Q_OBJECT
    public:
        explicit Window(QWidget* parent = nullptr);
    private slots:
        void test();
    private:
        GameManager* m_gm;
};

the <window.cpp>

#include "window.h"

Window::Window(QWidget* parent) : QWidget(parent) {
    m_gm = new GameManager(this);
    QTimer* timer = new QTimer(this);
    connect(timer, &QTimer::timeout, this, &Window::test);
    timer->start(1000);
    qDebug() << "Timer Window started now ";
}

void Window::test() { qDebug()<<"Window timer";}

the <gamemanager.h>

#include <QObject>
#include <QTimer>
#include <QtDebug>
class GameManager : public QWidget {
        Q_OBJECT
    public:
        explicit GameManager(QWidget* parent = 0);
        QTimer* timer;
       
    private slots :
       void Loop();
};

And finally the <gamemanager.cpp>

#include "game_manager.h"

GameManager::GameManager(QWidget* parent) : QWidget(parent) {
    timer = new QTimer(this);
    connect(timer, &QTimer::timeout, this, &GameManager::Loop);
    timer->start(1000);
    qDebug() << "Timer GM started now ";
}

void GameManager::Loop() {qDebug()<<"Game manager loop";}

The output gives me:

Timer GM started now
Timer Window started now
Window timer
Window timer
Window timer

So the GameManager loop is never called.

What would I be doing wrong ?

[GrecKo]

Can you double check the content of gamemanager.cpp? My guess is that you didn't paste the actual code and used a temporary QTimer. (or you did that with the GameManager in window.cpp)

[AnthonyL]

@GrecKo You are right, the problem lies elsewhere, In an effort to post the minimal code I removed the problem from my code.

It does not seem related to timer anymore but to other functions I call. Now I can find where the problem really comes from.

Thanks :)