Qt: Paint function of custom LineEditDelegate

Question

I have implemented ComboBoxDelegate. It is derived from QStyledItemDelegate. Paint function is used to show the content of cell when it is not editing node.

void ComboBoxDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const {
    QStyleOptionComboBox comboBoxOption;
    comboBoxOption.rect = option.rect;
    comboBoxOption.state = QStyle::State_Active | QStyle::State_Enabled;
    comboBoxOption.frame = true;
    comboBoxOption.currentText = index.model()->data(index).toString();
    QApplication::style()->drawComplexControl(QStyle::CC_ComboBox, &comboBoxOption, painter);
    QApplication::style()->drawControl(QStyle::CE_ComboBoxLabel, &comboBoxOption, painter);
}

Now I am trying to implement LineEditDelegate. I don't know how to write its paint function. Is there QStyleOptionComboBox like class for QLineEdit? Can you please share your code if anyone have done it?

Answer 1

Try this answer.

It uses QStyle::drawPrimitive with QStyle::PE_PanelLineEdit element.