[solved] catching toggle signal from bunch of QCheckBoxes ?

[deleted28]

Hello,

i have a bunch of QCheckboxes and put them into a QVector so i can access them
easily in a for loop.
In which kind of Container or Group/ Frame widget i should pack these Checkboxes
to get a signal when any of them got toggled ?
thanks !

void SetLogLevelDlg::on_pushButton_clicked()
{
    QVector<QCheckBox*> chkBits;
    chkBits.push_back(ui->chkb_0);
    chkBits.push_back(ui->chkb_1);
    chkBits.push_back(ui->chkb_2);
    chkBits.push_back(ui->chkb_3);
    chkBits.push_back(ui->chkb_4);
    chkBits.push_back(ui->chkb_5);
    chkBits.push_back(ui->chkb_6);
    chkBits.push_back(ui->chkb_7);

    quint8 result = 0;
    for(int i=7; i>0; --i) {
        result = result | chkBits[i]->isChecked();
        result = result << 1;
    }
    result = result | chkBits[0]->isChecked();

    ui->lb_result->setText(QString::number(result));
}

[tomasz3dk]

Use QSignalMapper.

[mchinand]

I'd use QButtonGroup. This is only for handling events from the group of buttons, and not for the layout of them in your GUI.

[deleted28]

Thank you, i will try both approaches.

[deleted28]

Seems i got a satisfying solution, any critics highly welcome:
Advantage of the QButtonGroup-approach is e.g. "setExclusive"
(Maybe helpful for others)

header:

private slots:
    void chkBox_clicked(int, bool);

private:
    Ui::MainWindow *ui;

    QCheckBox** chkBoxes;
    QButtonGroup *butGrp;
    QCheckBox* chkBox;

source:

• ui->VL_1 is a QVBoxLayout placed on fresh Form in Designer

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);

    chkBoxes = new QCheckBox*[8];
    butGrp = new QButtonGroup(this);

    for(int i=0; i<8; i++) {
        chkBox = new QCheckBox(QString("bit_%1").arg(i), this);
        chkBox->setObjectName(QString("bit_%1").arg(i));
        ui->VL_1->addWidget(chkBox);
        chkBoxes[i] = chkBox;
        butGrp->addButton(chkBoxes[i], i);
    }

    butGrp->setExclusive(false);
    connect(butGrp, SIGNAL(buttonToggled(int,bool)), this, SLOT(chkBox_clicked(int, bool)));

}
void MainWindow::chkBox_clicked(int _id, bool _b) {

    qDebug() << __FUNCTION__ << __LINE__ << _id << chkBoxes[_id]->objectName() << _b ;
    chkBoxes[_id]->setText("marked");

}

[LuGRU]

You can also do something different i.e. connect every checkbox (signal toggled(bool) to same slot and inside such slot just do:

    connect (ui->checkBox_1, SIGNAL(toggled(bool)), this, SLOT(checkBoxToggled(bool)));
    connect (ui->checkBox_2, SIGNAL(toggled(bool)), this, SLOT(checkBoxToggled(bool)));

Then in slot:

    QCheckBox *box = static_cast<QCheckBox*>( this->sender());
    if (state) {
        qDebug() << "Checked:" << box->objectName();
    }

That way You will still get access to the object. To i.e. uncheck all others You could use container -> findChildren<QCheckBox *>(); and uncheck all others. Of course above suggestions are still valid and in the end it all depends on Your need.

I personally wouldn't store list to Ui Widgets. I tend to create all my Ui's in QtDesigner and not by code so my above solution will give more flexibility.