comboBox runtime enable/disable

[TheCipo76]

@JonB
this is my dialog .h:

class inserisciarticolo : public QDialog
{
    Q_OBJECT

public:
    explicit inserisciarticolo(QWidget *parent = nullptr);
    ~inserisciarticolo();


private slots:

    void on_pushButton_Annulla_clicked();

    void on_pushButton_Inserisci_clicked();

    //void ATTDIS(int i);

private:
    Ui::inserisciarticolo *ui;

    QSqlDatabase aDatabase;
    QSqlQuery *aModel;

    //Array Componenti
    QLineEdit *array_Codice[10];
    QLineEdit *array_Descrizione[10];
    QSpinBox *array_Qta[10];
    QComboBox *array_Origine[10];  //<--------------------
    QComboBox *array_Fornitore[10]; //<------------------

[mpergand]

@TheCipo76 said in comboBox runtime enable/disable:

connect(array_Fornitore[i], SIGNAL(clicked()), this, SLOT(ATTDIS(int i)));

You need to capture the var i in a lambda:

connect(array_Fornitore[i], &QComboBox::clicked, [i]() 
{ 
ATTDIS(i);
});

[TheCipo76]

@mpergand
it's very interesting..

i can capture i var and pass it to a slot function
if i have understand..

but once i have done it what i have to do??
slot function do what i need?

[mpergand]

The lambda function becomes the slot function.
You probably need to capture 'this' as well to get access to methods and vars of the class instance.

[TheCipo76]

@mpergand
thank you very much for your reply
but i don't think i'm able to do this..

now i try to learn about lamba expression

[TheCipo76]

This post is deleted!

[TheCipo76]

@mpergand

i've tried with this code:

connect(array_Origine[i], SIGNAL(currentTextChanged(QString)) [i] () { ATTDIS(i);} );

and with this:

connect(array_Origine[i], SIGNAL(currentTextChanged(QString)) [this, i] () { ATTDIS(i);} );

but give me this error:

called object type 'char' is not a function or function pointer

how can i solve it??

void inserisciarticolo::ATTDIS(int i)
{
    if (array_Origine[i]->currentText() == "ESTERNA") {
        array_Fornitore[i]->setDisabled(false);
        array_Fornitore[i]->repaint();
    }
    if (array_Origine[i]->currentText() == "INTERNA") {
        array_Fornitore[i]->setDisabled(true);
        array_Fornitore[i]->repaint();
    }

}

[mpergand]

@TheCipo76 said in comboBox runtime enable/disable:

connect(array_Origine[i], SIGNAL(currentTextChanged(QString)) [this, i] () { ATTDIS(i);} );

connect(array_Origine[i], &QComboBox::currentTextChanged) [this, i] (QString str) { ATTDIS(i);} );

[TheCipo76]

@mpergand said in comboBox runtime enable/disable:

connect(array_Origine[i], &QComboBox::currentTextChanged) [this, i] (QString str) { ATTDIS(i);} );

don't work..

'QString' does not refer to a value

error: no matching member function for call to 'connect'

[mpergand]

QComboBox box;
box.setEditable(true);
QObject::connect(&box,&QComboBox::currentTextChanged,[](QString str)
{
qDebug()<<str;
});

box.show();

works as expected ....

[mpergand]

sorry typo:
connect(array_Origine[i], &QComboBox::currentTextChanged ) <- remove )
[this, i] (QString str) { ATTDIS(i);} );

[TheCipo76]

Finally works!

i passed no parameters to the function ATTDIS():

call the function then
i check with a loop all members of array (with "for" i index) and when
find "ESTERNA" enable comboFornitore[i]
when find "INTERNA" disable comboFornitore[i]

Thanks to all for patience and help gived

[TruongNguyen]

@Cobra91151 Thank you. It worked.