def __init__(self, display):
from event_handlers.mouse_event_handler import MouseEventHandler
from event_handlers.window_event_handler import WindowEventHandler
from event_handlers.keyboard_event_handler import KeyboardEventHandler
from event_handlers.screen_event_handler import ScreenEventHandler
self.display = display
self.handlers = {}
self.screens = []
self.mouse_event_handler = MouseEventHandler(self)
self.window_event_handler = WindowEventHandler(self)
self.keyboard_event_handler = KeyboardEventHandler(self)
self.screen_event_handler = ScreenEventHandler(self)
self.handle_events()
class EventDispatcher:
def __init__(self, display):
from event_handlers.mouse_event_handler import MouseEventHandler
from event_handlers.window_event_handler import WindowEventHandler
from event_handlers.keyboard_event_handler import KeyboardEventHandler
from event_handlers.screen_event_handler import ScreenEventHandler
self.display = display
self.handlers = {}
self.screens = []
self.mouse_event_handler = MouseEventHandler(self)
self.window_event_handler = WindowEventHandler(self)
self.keyboard_event_handler = KeyboardEventHandler(self)
self.screen_event_handler = ScreenEventHandler(self)
self.handle_events()
def handle_events(self):
errors = 0
while True:
try:
# Get the next event, or block until the next event is received.
event = self.display.next_event()
self.handle_event(event)
except Xlib.error.ConnectionClosedError:
log_error('Display connection closed by server.')
raise KeyboardInterrupt
except (KeyboardInterrupt, SystemExit):
raise
except:
errors += 1
if errors > MAX_EXCEPTIONS:
raise
traceback.print_exc()
def add_handler(self, event_type, handler_function):
self.handlers[event_type] = handler_function
def handle_event(self, event):
# Get the event handler, and handle the event.
handler = self.handlers.get(event.type)
if handler:
handler(event)
else:
print 'Unhandled event: {0}'.format(event.type)
def redirect_screen_events(self, screen_id):
error_catcher = Xlib.error.CatchError(Xlib.error.BadAccess)
# Enable placement control of subwindows.
mask = Xlib.X.SubstructureRedirectMask
root_window = self.display.screen(screen_id).root
root_window.change_attributes(event_mask=mask, onerror=error_catcher)
# Ensure that all errors are caught, and that everything is in sync.
self.display.sync()
if error_catcher.get_error():
return False
for keycode in get_enter_keycodes(self.display):
root_window.grab_key(keycode,
Xlib.X.Mod1Mask & ~RELEASE_MODIFIER,
1,
Xlib.X.GrabModeAsync,
Xlib.X.GrabModeAsync)
# Get all existing windows
for window in root_window.query_tree().children:
print "Grabbing motion events for window {0}...".format(window)
self.window_event_handler.grab_window_events(window)
return True
