Handles paint events for the combo box. Reimplemented from QWidget. Popups the combo box popup list. If the list is empty, no selections appear. Removes the item at position index .
Handles resize events for the combo box.
Reimplemented from QWidget. The combo box uses the list of items as candidates for completion. When auto-resizing is enabled, the combo box button will resize itself whenever the current combo box item change. Sets the background color for both the combo box button and the combo box popup list. Sets the current combo box item.