Pops up the menu or dropdown list of combo_box, the popup window will be grabbed so only device and its associated pointer/keyboard are the only GdkDevices able to send events to it.
a GdkDevice Since 3.0
See Implementation
Pops up the menu or dropdown list of combo_box, the popup window will be grabbed so only device and its associated pointer/keyboard are the only GdkDevices able to send events to it.