Can QComboBox items text consist of 2 colors?

Question

For example for string "Elon Musk":

• "Elon" text color is red;
• "Musk" text color is green;

Thanks in advance for any help you can provide

Answer 1

As an alternative approach to using delegates I would use a QLabel with rich text (HTML encoded) to color the combo box item text. I also need to implement an event filter to handle clicking (selecting) "custom" items. The following example demonstrates how to do it:

class Filter : public QObject
{
public:
  Filter(QComboBox *combo)
    :
      m_combo(combo)
  {}
protected:
  bool eventFilter(QObject *watched, QEvent * event) override
  {
    auto lbl = qobject_cast<QLabel *>(watched);
    if (lbl && event->type() == QEvent::MouseButtonRelease)
    {
      // Set the current index
      auto model = m_combo->model();
      for (int r = 0; r < model->rowCount(); ++r)
      {
        if (m_combo->view()->indexWidget(model->index(r, 0)) == lbl)
        {
          m_combo->setCurrentIndex(r);
          break;
        }
      }
      m_combo->hidePopup();
    }
    return false;
  }

private:
  QComboBox *m_combo;
};

And here is how to add "colored" items into combo box and handle them:

QComboBox box;
box.setEditable(true);
Filter filter(&box);

// Add two items: regular and colored.
box.addItem("A regular item");
box.addItem("Elon Musk");

// Handle the colored item. Color strings using HTML tags.
QLabel lbl("<font color=\"red\">Elon </font><font color=\"green\">Musk</font>", &box);
lbl.setAutoFillBackground(true);
lbl.installEventFilter(&filter);
box.view()->setIndexWidget(box.model()->index(1, 0), &lbl);

box.show();