def __init__(self, window, cursors):
super(XInputTabletCanvas, self).__init__(window)
self.cursors = cursors
dispatcher = XInputWindowEventDispatcher.get_dispatcher(window)
self.display = window.display
self._open_devices = []
self._cursor_map = {}
for cursor in cursors:
device = cursor.device
device_id = device._device_id
self._cursor_map[device_id] = cursor
cursor.max_pressure = device.axes[2].max
if self.display._display != device.display._display:
raise DeviceOpenException('Window and device displays differ')
open_device = xi.XOpenDevice(device.display._display, device_id)
if not open_device:
# Ignore this cursor; fail if no cursors added
continue
self._open_devices.append(open_device)
dispatcher.open_device(device_id, open_device, self)
def open(self, window=None, exclusive=False):
# Checks for is_open and raises if already open.
# TODO allow opening on multiple windows.
super(XInputDevice, self).open(window, exclusive)
if window is None:
self.is_open = False
raise DeviceOpenException('XInput devices require a window')
if window.display._display != self.display._display:
self.is_open = False
raise DeviceOpenException('Window and device displays differ')
if exclusive:
self.is_open = False
raise DeviceOpenException('Cannot open XInput device exclusive')
self._device = xi.XOpenDevice(self.display._display, self._device_id)
if not self._device:
self.is_open = False
raise DeviceOpenException('Cannot open device')
self._install_events(window)
