Hi,

Im pretty new to QT, and I tried following a tutorial on youtube (part1, part2) to build a simple timer.

When compiling my code, I get the warning:
Object::connect: No such slot MainWindow::start()
Object::connect: (sender name: 'bt_start')
Object::connect: (receiver name: 'MainWindow')

Here's my code so far:

main.cpp:
Qt Code: 
  1. #include <QtGui/QApplication>
  2. #include "mainwindow.h"
  3. #include "ui_mainwindow.h"
  4. #include <QPushButton>
  5.  
  6. int main(int argc, char *argv[])
  7. {
  8.     QApplication a(argc, argv);
  9.     MainWindow w;
  10.     w.show();
  11.     return a.exec();
  12. }
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mainwindow.h
Qt Code: 
  1. #ifndef MAINWINDOW_H
  2. #define MAINWINDOW_H
  3.  
  4. #include <QMainWindow>
  5. #include <QTimer>
  6. #include "ui_mainwindow.h"
  7. #include <QTGui>
  8.  
  9. namespace Ui {
  10.     class MainWindow;
  11. }
  12.  
  13. class MainWindow : public QMainWindow
  14. {
  15.     Q_OBJECT
  16. public:
  17.     QTimer *timer;
  18.     int hours;
  19.     int minutes;
  20.     int seconds;
  21.     explicit MainWindow(QWidget *parent = 0);
  22.     ~MainWindow();
  23.  
  24. private:
  25.     Ui::MainWindow *ui;
  26.     void count();
  27.     void start();
  28.     void stop();
  29.     void reset();
  30. };
  31.  
  32. #endif // MAINWINDOW_H
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Qt Code: 
  1. #include "mainwindow.h"
  2. #include "ui_mainwindow.h"
  3.  
  4. MainWindow::MainWindow(QWidget *parent) :
  5.     QMainWindow(parent),
  6.     ui(new Ui::MainWindow)
  7. {
  8.     ui->setupUi(this);
  9.     hours = 1;
  10.     minutes = 2;
  11.     seconds = 3;
  12.     timer = new QTimer(this);
  13.     connect(timer, SIGNAL(timeout()), this, SLOT(count()));
  14.     connect(ui->bt_start, SIGNAL(clicked()), this, SLOT(start()));
  15.     connect(ui->bt_stop, SIGNAL(clicked()), this, SLOT(stop()));
  16.     connect(ui->bt_reset, SIGNAL(clicked()), this, SLOT(reset()));
  17.  
  18. }
  19.  
  20. MainWindow::~MainWindow()
  21. {
  22.     delete ui;
  23. }
  24.  
  25. void MainWindow::start(){
  26.     timer->start(1000);
  27. }
  28.  
  29. << And the other functions >>
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It seems the constructor doesn't get loaded properly, becausein the GUI hours/minutes/seconds = 0, while I've set them on different numbers.

Can anyone tell me what I'm doing wrong? Thanks!