Qt C++ QComboBox Palette-setting the color (background-color)

How can I change the background-color QComboBox without using styleSheet?
Using this code:

QComboBox *cmb = new QComboBox(this);

    QPalette palette = cmb->palette();
    palette.setColor(QPalette::Base, Qt::red);
    cmb->setPalette(palette);

    QPalette view_palette = cmb->view()->palette();
    view_palette.setColor(QPalette::Base, Qt::red);
    cmb->view()->setPalette(view_palette);

    cmb->addItem("1");
    cmb->addItem("2");
    cmb->addItem("2");

I get the following result: the drop-down list color changes to red, but the comboBox button remains the standard color - how do I change the color of the comboBox completely? (I attach a screenshot of the current result) Screenshot 1Screenshot 2

Author: user362803, 2019-12-07
Source

1 answers

cmb->setEditable(true);
QLineEdit* lineEdit = cmb->lineEdit();
QPalette palette = lineEdit->palette();
palette.setColor(QPalette::Base, Qt::red);
lineEdit->setPalette(palette);
 0
Author: magrif, 2019-12-07 12:43:02