gtk:combo-box-popup-for-device (combo device)

combo -- a gtk:combo-box widget
device -- a gdk:device object

Pops up the menu or dropdown list of the combo box. The popup window will be grabbed so only device and its associated pointer/keyboard are the only gdk:device objects able to send events to it. The gtk:combo-box implementation is deprecated since 4.10. Use the gtk:drop-down widget instead.