How can i set time out condition in the timer? Duplicated : https://forum.qt.io/topic/138913/qtimer-make-traitement-out-of-for-loop

mpergand

@imene said in How can i set time out condition in the timer? Duplicated : https://forum.qt.io/topic/138913/qtimer-make-traitement-out-of-for-loop:

and from where i get "LongDelayTimeOut" is it known by Qt ?

You have to replace the for loop with a counter and to define the different states you need:

enum
{
Proceed_next,
LongDelayTimeOut,
...

}

as well as an instance variable to store the current operation status:

if(_currentState==LongDelayTimeOut)
    {
     // long delay ending
    }
else if(_currentState==Proceed_next)
   {
   _counter++;
// get next payload
if (PayloadData_R=="F12B")
   {
   _currentState=LongDelayTimeOut;
     QTimer::singleShot(6000, this, proceedNextStep);
      return;
   }

    // next payload
   _currentState=Proceed_next; // default state
   QTimer::singleShot(100,this, proceedNextStep);
    }

   }

Keep in mind that you need to know what to do each time proceedNext is call, so you need to carefuly define the different states of the current operation.

imene

@mpergand is "_counter++" an integer ?
in my case for(i=0, i< selection.count(), i++) so selection.count()=_counter?
and what _currentState takes initially ?

insteed of

for(int i=0; i< selection.count(); i++)

i will put

while(_counter!=0){_counter--}

imene

@imene What do you mean with

    // do step work
    
    // if no more step

inside void proceedNextStep() {} ?

mpergand

@imene said in How can i set time out condition in the timer? Duplicated : https://forum.qt.io/topic/138913/qtimer-make-traitement-out-of-for-loop:

while(_counter!=0){_counter--}

You can't have a loop, neither for nor while.
To eliminate the counter variable, you can put all the process informations you have to send in a queue (ex: QQueue) and call nextstep untill the queue is empty.

QQueue _proceedInfo;  // instance variable
...
  void proceedNextStep()  // slot
    {
        if(_processInfo.empty()) return; // no more process
        
        // do step work
        QString info=_processInfo.dequeue();
        
        if(info=="F12B"))  // special case
            {
            QTimer::singleShot(6000,this, [this]()
                {
                // long delay timeout
                ...
                // next step
                QTimer::singleShot(0,this, proceedNextStep);
                });
            
            return;
            }
        
        // do other process
        ...
        
        // proceed next step
        QTimer::singleShot(0,this, proceedNextStep);
    }

imene

@imene said in How can i set time out condition in the timer? Duplicated : https://forum.qt.io/topic/138913/qtimer-make-traitement-out-of-for-loop:

for(int i=0; i< selection.count(); i++)

@mpergand can i fill QQueue _proceedInfo this way ?

QQueue _proceedInfo;
for(int i=0; i< selection.count(); i++) 
{
  _proceedInfo=i;
 }

 void proceedNextStep()  // slot
    {
        if(_processInfo.empty()) return; // no more process
        
        // do step work
        QString info=_processInfo.dequeue();
        
        if(info=="F12B"))  // special case
            {
            QTimer::singleShot(6000,this, [this]()
                {
                // long delay timeout
                ...
                // next step
                QTimer::singleShot(0,this, proceedNextStep);
                });
            
            return;
            }
        
        // do other process
        ...
        
        // proceed next step
        QTimer::singleShot(0,this, proceedNextStep);
    }

and look what i get here:

jsulm

@imene said in How can i set time out condition in the timer? Duplicated : https://forum.qt.io/topic/138913/qtimer-make-traitement-out-of-for-loop:

can i fill QQueue _proceedInfo this way ?

Please read documentation: https://doc.qt.io/qt-6/qqueue.html
To add elements to the queue you call enqueue() as shown there.

Regarding error: what you are doing is wrong. When you call singleShot you do NOT call the member function but pass its address:

QTimer::singleShot(100, this, &MainWindow::processStep);

mpergand

@imene said in How can i set time out condition in the timer? Duplicated : https://forum.qt.io/topic/138913/qtimer-make-traitement-out-of-for-loop:

can i fill QQueue _proceedInfo this way ?

QQueue is a tempate class, see the doc.

try: QTimer::singleShot(0,this, SLOT(proceedNextStep));
Remember what i write is pseudo code.

imene

@jsulm
i found this code here https://doc.qt.io/qt-6/qqueue.html

QQueue<int> queue;
queue.enqueue(1);
queue.enqueue(2);
queue.enqueue(3);

i fixe it this way:

QQueue<int>  _proceedInfo;
for(int i=0; i< selection.count(); i++) 
{
  _proceedInfo.enqueue(i);
 }

imene

@mpergand in this case in your code :

QQueue _proceedInfo;  // instance variable
...
  void proceedNextStep()  // slot
    {
        if(_processInfo.empty()) return; // no more process
        
        // do step work
        QString info=_processInfo.dequeue();
        
        if(info=="F12B"))  // special case
            {
            QTimer::singleShot(6000,this, [this]()
                {
                // long delay timeout
                ...
                // next step
                QTimer::singleShot(0,this, proceedNextStep);
                });
            
            return;
            }
        
        // do other process
        ...
        
        // proceed next step
        QTimer::singleShot(0,this, proceedNextStep);
    }

No need for enum variable ? they doesn't exist here ?

imene

@mpergand is this code have to be inside void proceedNextStep(){...} ?

if(_currentState==LongDelayTimeOut)
    {
     // long delay ending
    }
else if(_currentState==Proceed_next)
   {
   _counter++;
// get next payload
if (PayloadData_R=="F12B")
   {
   _currentState=LongDelayTimeOut;
     QTimer::singleShot(6000, this, proceedNextStep);
      return;
   }

    // next payload
   _currentState=Proceed_next; // default state
   QTimer::singleShot(100,this, proceedNextStep);
    }

   }

mpergand

@imene said in How can i set time out condition in the timer? Duplicated : https://forum.qt.io/topic/138913/qtimer-make-traitement-out-of-for-loop:

No need for enum variable ?

Yes if it is all you have to do.

I still don't understand why you want to store number instead of the data you really need:

QString PayloadData_R = m_ui->Table_CSV->model()->data(m_ui->Table_CSV->model()->index(b,1)).toString();

Put that string directly in the queue.

imene

@mpergand Because i need "b" inside index(b,1)
i get it this way:

for(int i=0; i< selection.count(); i++)
    {
        QModelIndex ind = selection.at(i);//at returns item at the index position i
             qDebug() << "QModelIndex ind = selection.at(i);" << ind;
        int a= ind.column(); //Returns the column this model index refers to
             qDebug() << "a=" << a;
        int b= ind.row(); //Returns the row this model index refers to
             qDebug() << "b=" << b; //indice ligne

        //getting data from selected row

        QString PayloadData_R = m_ui->Table_CSV->model()->data(m_ui->Table_CSV->model()->index(b,1)).toString();
        qDebug() <<"PayloadData_R sendrow="<<PayloadData_R;

mpergand

The idea is to put the data you need in the queue before calling proceedNext:

for(int i=0; i< selection.count(); i++)
    {
        QModelIndex ind = selection.at(i);//at returns item at the index position i
    // bla bla
    _proceedInfo.enqueue(PayloadData_R);
    }

// start sending data
proceedNext();

imene

I want to put this function inside connect but it don't work;
void MainWindow::sendFrame(int i)

 connect(m_speedTimer,&QTimer::timeout, this, &MainWindow::sendFrame);

jsulm

@imene The error is clear, isn't it?
The arguments of the signal and slot do not match. You can use a lambda as slot to work around this.

imene

This is my sendFrame function how can i pass it as a slot with its parameter that changes each timeout ?

class MainWindow : public QMainWindow
{
....
private slots:
 void sendFrame(QString IdData_R,QString PayloadData_R,int i);
}

jsulm

@imene said in How can i set time out condition in the timer? Duplicated : https://forum.qt.io/topic/138913/qtimer-make-traitement-out-of-for-loop:

how can i pass it as a slot with its parameter that changes each timeout

I already told you how: "You can use a lambda as slot to work around this"...