How to pass the parameters between the SIGNAL and SLOTS

mrjj

hi
Seems to work fine even with a 100 MS timer so should work for you too.

Can you please try ?

https://www.dropbox.com/s/l8go4t71unosl05/CrossTalk.zip?dl=0

alt text

Alex42

ok , can you show me your code please ;

mrjj

@Alex42
The dropbox link is the full project you can just run.
If not allowed to use dropbox is there any other such service you are allowed to use ?
(you don't have to register. just press the download and you should get zip file)

Alex42

ok, ok ,
when I try it all alone, (with only the QTimer ) it works very well, (like your exemple )
but when i try my real interface it does not work

you know ?
my first QlineEdit (1 forme ) containe the result of the calculaions (which makes calculates each 1000ms) whithe this fonction ```

i show you how the calcualte_3() fonction do

void Mesure :: calculate_3 ()
{

    S++;

    if (S>0)
    {
    emit newtextChanged_1(mence->text());  /// works

    double  Val13=ui->lineEdit_13->text().toInt();
    double  Val14=ui->lineEdit_14->text().toInt();
    double  Val15=ui->lineEdit_15->text().toInt();
    double  Val16=ui->lineEdit_16->text().toInt();
double  V1,V2, V3 ,V4, V5, V6,V7;
    int P=ui->spinBox_1->value();
      switch (P) {
      case 2 :
          if ( Val0 <Val1)
          {

               ui->lineEdit_17->setText(QString::number(Val9));
              // mence->setText(QString::number(Val9));
                  }
          else if ( ((Val0>Val1) && (Val0<Val2)) || (Val0>2))
          {
               // V1 = Val0* Val10/Val2;
              V1= Val10 * (Val0 - Val1)/(Val2-Val1) +Val9 *(Val2-Val0)/(Val2-Val1);

                  ui->lineEdit_17->setText(QString::number(V1));
                //  mence->setText(QString::number(V1));
          }

          break;
    case 3:
          if ( ((Val0>Val2) && (Val0<Val3))|| (Val0>Val3) )
          {

            V2 = Val11 * (Val0 - Val2)/(Val3-Val2) +Val10 *(Val3-Val0)/(Val3-Val2);
             //V2 = Val12 * (Val0-Val2/Val3-Val2) + Val10 * (Val3-Val0/Val3-Val2);

           ui->lineEdit_17->setText(QString::number(V2));
           //mence->setText(QString::number(V2));

          } else if (Val0<Val2)
          {
              V1= Val10 * (Val0 - Val1)/(Val2-Val1) +Val9 *(Val2-Val0)/(Val2-Val1);
              ui->lineEdit_17->setText(QString::number(V1));
             // mence->setText(QString::number(V1));

          }
          break;
          /*
           else if (Val0>Val1 && Val0 <Val2 &&Val0 < Val3 ) {

             // V3 = (Val10 * (Val3-Val0) - Val11 * (Val2-Val0))/(Val3-Val2);
              //ui->lineEdit_17->setText(QString::number(V3));
               V1 = Val0* Val10/Val2;
              ui->lineEdit_17->setText(QString::number(V1));
      } else if (  Val0 > Val3)
               {



             V4= ((Val0 - Val2)* Val11 - Val10 * (Val0-Val3))/ (Val3-Val2) ;
             ui->lineEdit_17->setText(QString::number(V4));
          }
        */
          break;
      case 4 :
          if (((Val0 > Val3) && (Val0 <Val4) )||(Val0>Val4))
          {
              V3 = Val12 * (Val0-Val3)/(Val4-Val3) +Val11 * (Val4-Val0)/(Val4-Val3);
              ui->lineEdit_17->setText(QString::number(V3));
            //  mence->setText(QString::number(V3));
          } else if ((Val0>Val2) && (Val0 <Val3))

and this fonction is update withe the Qtimer lik this connection

connect (timer, SIGNAL (timeout()), this ,SLOT (calculate_3()));

mrjj

@Alex42

Hi
In the code you shown, you call
emit newtextChanged_1(mence->text());
in the top and that seems to work.

But I don't see you call
emit after any of the calculations?

It will send a copy of the text so you have to do it after you have put it into mence->setText.

so if you don't have it, you need the emit to be at the end of the function.

Alex42

i'm tried to emit the signal at the beginning and at the end of this function but without success

Alex42

i will try to emit the signal every time i do a calculation in this fonction

Alex42

@Alex42 said in How to pass the parameters between the SIGNAL and SLOTS:

i will try to emit the signal every time i do a calculation in this fonction

i'm trying to emit the signal every time i do a calculation in this fonction but without success

case 2 :
          if ( Val0 <Val1)
          {

               ui->lineEdit_17->setText(QString::number(Val9));
     mence->setText(QString::number(Val9));
               emit newtextChanged_1(mence->text());
                  }
          else if ( ((Val0>Val1) && (Val0<Val2)) || (Val0>2))
          {
               // V1 = Val0* Val10/Val2;
              V1= Val10 * (Val0 - Val1)/(Val2-Val1) +Val9 *(Val2-Val0)/(Val2-Val1);

                  ui->lineEdit_17->setText(QString::number(V1));
                  emit newtextChanged_1(mence->text());
                 mence->setText(QString::number(V1));
          }

Alex42

incredible , when i try this he work very will

void Mesure  :: calculate_3 ()
{
    S++;


     emit newtextChanged_1(QString::number (S));
}

but withe this signal he want to work

   emit newtextChanged_1(mence ->text());

mrjj

@Alex42

Ok.
I was wondering one thing.
All your other linedits are in the UI
but mence
is not

Do you have 2 of them for some reason ?
so there is also the
ui->mence ?

Why is mence not in the UI.
Do you insert it from code to the fom?

Alex42

@mrjj ,it's a good question, i coded mence (QlineEdit) with a hand , because , ui->lineEdit_17 ->text () he doesn't work, for this i created mence -> text() ,
but the bothe not want to work

Alex42

the ui->lineEdit_17->text() ,and mence ->text() , it's the same thing , just one coded with a hand , and auther coder with Qt creator Form (Ui)

J.Hilk

@Alex42
I'm sure, that if you do:

void Mesure  :: calculate_3 ()
{
    S++;

    mence->setText(QString::number (S));
     emit newtextChanged_1(mence->text());
}

it will work just as well as

void Mesure  :: calculate_3 ()
{
    S++;


     emit newtextChanged_1(QString::number (S));
}

somewhere you're setting your mence->text to 0

I good point to start the debugger and step through your code line by line, btw.

Alex42

@J-Hilk , thank you for your response , yes i don't any probleme with your code ( it works very will )

but the probleme it's when i try to transmete the real values ,
are you understande that the real valueu it's not number S ?

Alex42

as i mentioned below, my edited QLine (mence ->text(), OR, ui->lineEdite_17->text()) contains scientific calculation results which change every 1000ms

J.Hilk

@Alex42 said in How to pass the parameters between the SIGNAL and SLOTS:

are you understande that the real valueu it's not number S ?

I do, do you realise, that mence is not the problem here ?

on a hinge: try the following:

//V1= Val10 * (Val0 - Val1)/(Val2-Val1) +Val9 *(Val2-Val0)/(Val2-Val1);
mence->setText(QString::number( ( Val10 * (Val0 - Val1)/static_cast<double>(Val2-Val1) +Val9 *(Val2-Val0)/static_cast<double>(Val2-Val1) ) ));;

Alex42

@J-Hilk said in How to pass the parameters between the SIGNAL and SLOTS:

//V1= Val10 * (Val0 - Val1)/(Val2-Val1) +Val9 *(Val2-Val0)/(Val2-Val1);
mence->setText(QString::number( ( Val10 * (Val0 - Val1)/static_cast<double>(Val2-Val1) +Val9 *(Val2-Val0)/static_cast<double>(Val2-Val1) ) ));;

it's the same problem

Alex42

you know in the same classe i don't have any problem , just when i try to read the values in another class, for exemple
when i do this in the same classe i have no probleme

connect (ui->lineEdit_17, SIGNAL (textChanged(QString)), this ,SLOT (encore_2(QString)));
void mesure::encore_2(QString)
{

mence->setText(ui->lineEdit_17->text());

Alex42

@J-Hilk said in How to pass the parameters between the SIGNAL and SLOTS:

somewhere you're setting your mence->text to 0

it can be a private or public story because I declared my variables inside the calculate () slot

mrjj

@Alex42

Go to where you define mence and right click and use "Find Usage" and it will show all places.

I cannot guess what it only send zero but we know signal works and we can send a string
so its a logical bug with mence and we cannot not spot it as we see only pieces and its easy to stare blind on own code so you dont either.