def __init__(self, display, device_info):
super(XInputDevice, self).__init__(display, asstr(device_info.name))
self._device_id = device_info.id
self._device = None
# Read device info
self.buttons = []
self.keys = []
self.axes = []
ptr = device_info.inputclassinfo
for i in range(device_info.num_classes):
cp = ctypes.cast(ptr, ctypes.POINTER(xi.XAnyClassInfo))
cls_class = getattr(cp.contents, 'class')
if cls_class == xi.KeyClass:
cp = ctypes.cast(ptr, ctypes.POINTER(xi.XKeyInfo))
self.min_keycode = cp.contents.min_keycode
num_keys = cp.contents.num_keys
for i in range(num_keys):
self.keys.append(Button('key%d' % i))
elif cls_class == xi.ButtonClass:
cp = ctypes.cast(ptr, ctypes.POINTER(xi.XButtonInfo))
num_buttons = cp.contents.num_buttons
for i in range(num_buttons):
self.buttons.append(Button('button%d' % i))
elif cls_class == xi.ValuatorClass:
cp = ctypes.cast(ptr, ctypes.POINTER(xi.XValuatorInfo))
num_axes = cp.contents.num_axes
mode = cp.contents.mode
axes = ctypes.cast(cp.contents.axes,
ctypes.POINTER(xi.XAxisInfo))
for i in range(num_axes):
axis = axes[i]
if mode == xi.Absolute:
self.axes.append(
AbsoluteAxis('axis%d' % i,
min=axis.min_value,
max=axis.max_value))
elif mode == xi.Relative:
self.axes.append(RelativeAxis('axis%d' % i))
cls = cp.contents
ptr = ptr_add(ptr, cls.length)
self.controls = self.buttons + self.keys + self.axes
# Can't detect proximity class event without opening device. Just
# assume there is the possibility of a control if there are any axes.
if self.axes:
self.proximity_control = Button('proximity')
self.controls.append(self.proximity_control)
else:
self.proximity_control = None
