MenuButton.setIconName
void setIconName(string iconName)Sets the name of an icon to show inside the menu button.
Setting icon name resets [gtk.menu_button.MenuButton.label] and [gtk.menu_button.MenuButton.child].
If propertyGtk.MenuButton:always-show-arrow is set to TRUE and [gtk.menu_button.MenuButton.direction] is not [gtk.types.ArrowType.None], a dropdown arrow will be shown next to the icon.
Parameters
iconName | the icon name |