How to connect mainwindow and dialog using signal,slot

[harvey_slash]

I had tried the str method before, same error
here is the place where I am opening the dialog

void MainWindow::keyPressEvent(QKeyEvent *event)
{
 
 
    int i=event->key();
    //char z=(char)i;
 
 
 
 
 
if(i>=48&&i<=57)
 
{
    QString s= QString::number(i-'0');
 
 
    q+=s;
    ui->lineEdit->setText(q);
 
}
if(q.length()>20)
{
    dialog =new Dialog();
    dialog->show();
 
}
 
 
 
}

void MainWindow::keyPressEvent(QKeyEvent *event)
{


    int i=event->key();
    //char z=(char)i;





if(i>=48&&i<=57)

{
    QString s= QString::number(i-'0');


    q+=s;
    ui->lineEdit->setText(q);

}
if(q.length()>20)
{
    dialog =new Dialog();
    dialog->show();

}



}

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[toufic.dbouk]

well where is your connect statement ? is it being executed before the dialog instance is created ?
add the connect statement under the line where you instantiate the dialog class ie under dialog= new Dialog(this) and see what happens

the note about the "str" was just to avoid hard coding didn't have anything with the error.

[harvey_slash]

my connect is in the mainwindow constructor.

I put connect here now

dialog =new Dialog();
     connect(ui->lineEdit, SIGNAL(textEdited(QString)), dialog, SLOT(seText(QString)));
    dialog->show();

dialog =new Dialog();
     connect(ui->lineEdit, SIGNAL(textEdited(QString)), dialog, SLOT(seText(QString)));
    dialog->show();

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its not showing any error, but the text is not getting displayed
(I tried textChanged and textEdited ,both)

[toufic.dbouk]

Put a qDebug in the seText() and check if its being executed or not
and try this maybe its a logical error

if(q.length()>20)
{
    ui->lineEdit->setText("test");
    dialog =new Dialog();
    connect(ui->lineEdit, SIGNAL(textChanged(QString)), dialog, SLOT(seText(QString)));
    dialog->show();
    ui->lineEdit->setText("test1");
 
}

if(q.length()>20)
{
    ui->lineEdit->setText("test");
    dialog =new Dialog();
    connect(ui->lineEdit, SIGNAL(textChanged(QString)), dialog, SLOT(seText(QString)));
    dialog->show();
    ui->lineEdit->setText("test1");
 
}

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it would have been really helpful and time saving if you just posted the complete code instead of parts of it every now and then...