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from __future__ import unicode_literals
from itertools import product
from collections import defaultdict
__all__ = (
'MouseHandlers',
)
class MouseHandlers(object):
"""
Two dimentional raster of callbacks for mouse events.
"""
def __init__(self):
def dummy_callback(cli, mouse_event):
"""
:param mouse_event: `MouseEvent` instance.
"""
# Map (x,y) tuples to handlers.
self.mouse_handlers = defaultdict(lambda: dummy_callback)
def set_mouse_handler_for_range(self, x_min, x_max, y_min, y_max, handler=None):
"""
Set mouse handler for a region.
"""
for x, y in product(range(x_min, x_max), range(y_min, y_max)):
self.mouse_handlers[x,y] = handler
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