program a combobox in a dialog

[Devoraz]

hi. i have a dialog created using QtDesginer. can i add a combobox in that dialog using pure c++ language? example show in the code below.

void SettingsWindow::drawCombobox()
{
	QSettings settings;
 
	endDeviceCombobox = new QComboBox(ui.groupBox_2);
	endDeviceCombobox->setGeometry(QRect(190, 20, 111, 21));
	endDeviceCombobox->setEditable(false);
	endDeviceCombobox->setDuplicatesEnabled(false);
}

void SettingsWindow::drawCombobox()
{
	QSettings settings;

	endDeviceCombobox = new QComboBox(ui.groupBox_2);
	endDeviceCombobox->setGeometry(QRect(190, 20, 111, 21));
	endDeviceCombobox->setEditable(false);
	endDeviceCombobox->setDuplicatesEnabled(false);
}

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i tried but the combobox doesnt appear in the dialog. why so?

[spirit]

trye to call show method, i.e.

...
endDeviceCombobox->show();

...
endDeviceCombobox->show();

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[wagmare]

just design a empty QFrame in designer and add QComboBox to the widget in your code ..

[numbat]

Your code worked for me. One possibility is that your group box is too small.

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
{
    QGroupBox * gb = new QGroupBox;
    QComboBox * endDeviceCombobox = new QComboBox(gb);
    endDeviceCombobox->setGeometry(QRect(190, 20, 111, 21));
    endDeviceCombobox->setEditable(false);
    endDeviceCombobox->setDuplicatesEnabled(false);
 
    setCentralWidget(gb);
}

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
{
    QGroupBox * gb = new QGroupBox;
    QComboBox * endDeviceCombobox = new QComboBox(gb);
    endDeviceCombobox->setGeometry(QRect(190, 20, 111, 21));
    endDeviceCombobox->setEditable(false);
    endDeviceCombobox->setDuplicatesEnabled(false);

    setCentralWidget(gb);
}

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