Update time on screen using a thread.

[TFH]

I need to use threads for on screen time update and to interface with a serial port. I have tried to impliment code I have found in examples and I always end up preventing my application from showing up. How do I have a thread run in the background (like incrimenting the time) while the application runs in paralel? Here is the thread code for the time function.

thread code in application

class MegaStoreMain : public QGroupBox
{
    Q_OBJECT
 
public:
    explicit MegaStoreMain(QWidget *parent = 0);
    ~MegaStoreMain();
 
 
    ControlProgram controlProgram;
private:
    Ui::MegaStoreMain *ui;
    QTime Time;
};
MegaStoreMain::MegaStoreMain(QWidget *parent) :
    QGroupBox(parent),
    ui(new Ui::MegaStoreMain)
{
    ui->setupUi(this);
    ui->tbIDEntry->isReadOnly();
    ui->leEmployeeNo->isReadOnly();
    FirstEntry = FALSE;
    PasswordEntry = FALSE;
    PasswordID = FALSE;
    EnteredPassword = "";
    ui->labelEmpoyeeID->setVisible(FALSE);
    ui->labelPassword->setVisible(FALSE);
    ui->password->setVisible(FALSE);
    ui->userID->setVisible(FALSE);
    ui->RunningTime->setVisible(TRUE);
    connect(&controlProgram, SIGNAL(RunTimeUpdate(TimeString)),
            this, SLOT(UpdateTime(String)));
    Time.start();
    Time.currentTime();
    int Hour = Time.hour();
    int Minute = Time.minute();
    int Second = Time.second();
    char buf[20];
    sprintf(buf,"%d:%d:%d",Hour,Minute,Second);
    ui->RunningTime->setText(buf);
}
void MegaStoreMain::UpdateTime(char* TimeString)
{
    ui->RunningTime->setText(TimeString);
}

class MegaStoreMain : public QGroupBox
{
    Q_OBJECT

public:
    explicit MegaStoreMain(QWidget *parent = 0);
    ~MegaStoreMain();

 
    ControlProgram controlProgram;
private:
    Ui::MegaStoreMain *ui;
    QTime Time;
};
MegaStoreMain::MegaStoreMain(QWidget *parent) :
    QGroupBox(parent),
    ui(new Ui::MegaStoreMain)
{
    ui->setupUi(this);
    ui->tbIDEntry->isReadOnly();
    ui->leEmployeeNo->isReadOnly();
    FirstEntry = FALSE;
    PasswordEntry = FALSE;
    PasswordID = FALSE;
    EnteredPassword = "";
    ui->labelEmpoyeeID->setVisible(FALSE);
    ui->labelPassword->setVisible(FALSE);
    ui->password->setVisible(FALSE);
    ui->userID->setVisible(FALSE);
    ui->RunningTime->setVisible(TRUE);
    connect(&controlProgram, SIGNAL(RunTimeUpdate(TimeString)),
            this, SLOT(UpdateTime(String)));
    Time.start();
    Time.currentTime();
    int Hour = Time.hour();
    int Minute = Time.minute();
    int Second = Time.second();
    char buf[20];
    sprintf(buf,"%d:%d:%d",Hour,Minute,Second);
    ui->RunningTime->setText(buf);
}
void MegaStoreMain::UpdateTime(char* TimeString)
{
    ui->RunningTime->setText(TimeString);
}

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header

#include <QMutex>
 #include <QSize>
 #include <QThread>
 #include <QTime>
 #include <QWaitCondition>
 
 
 class ControlProgram : public QThread
 {
     Q_OBJECT
 
 public:
     ControlProgram(QObject *parent = 0);
     ~ControlProgram();
 
     QTime  SessionTime;
     QTime RunningTime;
     int Hour;
     int Minute;
     int Second;
 
 
 signals:
     void RunTimeUpdate(char* TimeString);
 
 protected:
     void run();
 
 private:
 
     QMutex mutex;
     QWaitCondition condition;
     bool restart;
     bool abort;
 
 };

#include <QMutex>
 #include <QSize>
 #include <QThread>
 #include <QTime>
 #include <QWaitCondition>


 class ControlProgram : public QThread
 {
     Q_OBJECT

 public:
     ControlProgram(QObject *parent = 0);
     ~ControlProgram();

     QTime  SessionTime;
     QTime RunningTime;
     int Hour;
     int Minute;
     int Second;


 signals:
     void RunTimeUpdate(char* TimeString);

 protected:
     void run();

 private:

     QMutex mutex;
     QWaitCondition condition;
     bool restart;
     bool abort;

 };

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source

#include <QtGui>
 
#include <math.h>
 
#include "controlProgram.h"
 
ControlProgram::ControlProgram(QObject *parent)
    : QThread(parent)
{
    restart = false;
    abort = false;
    run();
 
}
 
ControlProgram::~ControlProgram()
{
    mutex.lock();
    abort = true;
    condition.wakeOne();
    mutex.unlock();
 
    wait();
}
 
 
void ControlProgram::run()
{
    SessionTime.start();
    SessionTime.currentTime();
    RunningTime.start();
    RunningTime.currentTime();
//    forever
    {
        mutex.lock();
        Hour = RunningTime.hour();
        Minute = RunningTime.minute();
        Second = RunningTime.second();
        char buf[20];
        sprintf(buf,"%d:%d:%d",Hour,Minute,Second);
        mutex.unlock();
        emit RunTimeUpdate(&buf[0]);
        if (!restart)
            condition.wait(&mutex);
        restart = false;
//     sleep(1);
    }
}

#include <QtGui>

#include <math.h>

#include "controlProgram.h"

ControlProgram::ControlProgram(QObject *parent)
    : QThread(parent)
{
    restart = false;
    abort = false;
    run();

}

ControlProgram::~ControlProgram()
{
    mutex.lock();
    abort = true;
    condition.wakeOne();
    mutex.unlock();

    wait();
}


void ControlProgram::run()
{
    SessionTime.start();
    SessionTime.currentTime();
    RunningTime.start();
    RunningTime.currentTime();
//    forever
    {
        mutex.lock();
        Hour = RunningTime.hour();
        Minute = RunningTime.minute();
        Second = RunningTime.second();
        char buf[20];
        sprintf(buf,"%d:%d:%d",Hour,Minute,Second);
        mutex.unlock();
        emit RunTimeUpdate(&buf[0]);
        if (!restart)
            condition.wait(&mutex);
        restart = false;
//     sleep(1);
    }
}

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