Eryn Wells
003aedf30e
Events start in the Interface. The interface gets first crack at any incoming events. If the interface doesn't handle the event, it is given to the engine. The engine has an EngineEventHandler that yields actions just like the event handler prior to this change. The interface's event handler passes events to each window in the interface. Windows can choose to handle events however they like, and they return a bool indicating whether the event was fully handled.
50 lines
1.4 KiB
Python
50 lines
1.4 KiB
Python
# Eryn Wells <eryn@erynwells.me>
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'''Defines event handling mechanisms.'''
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from typing import TYPE_CHECKING
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from tcod import event as tev
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if TYPE_CHECKING:
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from . import Interface
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class InterfaceEventHandler(tev.EventDispatch[bool]):
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'''The event handler for the user interface.'''
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def __init__(self, interface: 'Interface'):
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super().__init__()
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self.interface = interface
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self._handlers = []
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self._refresh_handlers()
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def _refresh_handlers(self):
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self._handlers = [
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self.interface.map_window.event_handler,
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self.interface.message_window.event_handler,
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self.interface.info_window.event_handler,
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]
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def ev_keydown(self, event: tev.KeyDown) -> bool:
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return self._handle_event(event)
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def ev_keyup(self, event: tev.KeyUp) -> bool:
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return self._handle_event(event)
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def ev_mousemotion(self, event: tev.MouseMotion) -> bool:
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return self._handle_event(event)
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def ev_mousebuttondown(self, event: tev.MouseButtonDown) -> bool:
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return self._handle_event(event)
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def ev_mousebuttonup(self, event: tev.MouseButtonUp) -> bool:
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return self._handle_event(event)
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def _handle_event(self, event: tev.Event) -> bool:
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for handler in self._handlers:
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if handler and handler.dispatch(event):
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return True
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return False
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