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from collections import defaultdict from itertools import product from typing import Callable, DefaultDict, Tuple from prompt_toolkit.mouse_events import MouseEvent __all__ = [ "MouseHandlers", ] class MouseHandlers: """ Two dimensional raster of callbacks for mouse events. """ def __init__(self) -> None: def dummy_callback(mouse_event: MouseEvent) -> None: """ :param mouse_event: `MouseEvent` instance. """ # Map (x,y) tuples to handlers. self.mouse_handlers: DefaultDict[ Tuple[int, int], Callable[[MouseEvent], None] ] = defaultdict(lambda: dummy_callback) def set_mouse_handler_for_range( self, x_min: int, x_max: int, y_min: int, y_max: int, handler: Callable[[MouseEvent], None], ) -> 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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