XkbGetDeviceButtonActions queries the server for the desired button information for the device indicated
device_spec field of
device_info and waits for a reply. If successful,
XkbGetDeviceButtonActions backfills the button actions
(btn_acts field of
device_info) for only the requested buttons, updates the
name, type, supported, and
unsupported fields, and returns Success.
all_buttons, first_button and
num_buttons specify the device buttons for which actions should be returned. Setting
all_buttons to True requests actions for all device buttons; if
all_buttons is False,
num_buttons specify a range of buttons for which actions are requested.
If a compatible version of Xkb is not available in the server or the Xkb
extension has not been properly initialized,
XkbGetDeviceButtonActions returns BadAccess. If allocation errors occur, a BadAlloc status is returned. If
the specified device
(device_info->device_spec) is invalid, a BadKeyboard status is returned. If the device has no buttons, a
BadMatch status is returned. If
num_buttons specify illegal buttons, a BadValue status is returned.