def get_property_value(properties, key):
key_string = create_cfstring(key)
value = ctypes.c_void_p()
present = carbon.CFDictionaryGetValueIfPresent(properties, key_string,
ctypes.byref(value))
carbon.CFRelease(key_string)
if not present:
return None
return value
def _init_properties(self, generic_device):
properties = CFMutableDictionaryRef()
_oscheck(
carbon.IORegistryEntryCreateCFProperties(generic_device,
ctypes.byref(properties),
None, 0))
self.name = get_property(properties, "Product")
self.manufacturer = get_property(properties, "Manufacturer")
carbon.CFRelease(properties)
def _get_elements(self):
elements_array = CFArrayRef()
_oscheck(
self._device.contents.contents.copyMatchingElements(
self._device, None, ctypes.byref(elements_array)))
self._element_cookies = dict()
elements = list()
n_elements = carbon.CFArrayGetCount(elements_array)
for i in range(n_elements):
properties = carbon.CFArrayGetValueAtIndex(elements_array, i)
element = DeviceElement(self, properties)
elements.append(element)
self._element_cookies[element._cookie] = element
carbon.CFRelease(elements_array)
return elements
def _init_controls(self):
elements_array = CFArrayRef()
_oscheck(
self._device.contents.contents.copyMatchingElements(self._device,
None, ctypes.byref(elements_array))
)
self._control_cookies = {}
controls = []
n_elements = carbon.CFArrayGetCount(elements_array)
for i in range(n_elements):
properties = carbon.CFArrayGetValueAtIndex(elements_array, i)
control = _create_control(properties)
if control:
controls.append(control)
self._control_cookies[control._cookie] = control
carbon.CFRelease(elements_array)
return controls
def __init__(self, display, generic_device):
super(DarwinHIDDevice, self).__init__(display, name=None)
self._device = self._get_device_interface(generic_device)
properties = CFMutableDictionaryRef()
_oscheck(
carbon.IORegistryEntryCreateCFProperties(generic_device,
ctypes.byref(properties),
None, 0)
)
self.name = get_property(properties, "Product")
self.manufacturer = get_property(properties, "Manufacturer")
self.usage_page = get_property(properties, 'PrimaryUsagePage')
self.usage = get_property(properties, 'PrimaryUsage')
carbon.CFRelease(properties)
self._controls = self._init_controls()
self._open = False
self._queue = None
self._queue_depth = 8 # Number of events queue can buffer
