handlerchain_exercise.py

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from .handlerchain_class import HandlerChain
from .handlerchain_messagewindow_class import MessageWindow, MessageWindowFactory
from .handlerchain_message_class import Message, MessagePosition, MessageType
 
 
def _HandlerChain_ConstructWindowChain(handlerChain : HandlerChain) -> None:
    # Note: This creates each window and adds the new window to the given
    # HandlerChain object.
    #
    # This example doesn't care about each individual window so the
    # return value is ignored.
    MessageWindowFactory.CreateWindow("Window 1", 0, 0, 10, 10, handlerChain)
    MessageWindowFactory.CreateWindow("Window 2", 20, 0, 5, 5, handlerChain)
    MessageWindowFactory.CreateWindow("Window 3", 30, 10, 15, 15, handlerChain)
 
 
 
 
 
# ! [Using HandlerChain in Python]
def HandlerChain_Exercise():
    print()
    print("Handler Chain Exercise")
 
    # Construct a handler chain and populate with windows that can
    # handle messages.
    handlerChain = HandlerChain()
    _HandlerChain_ConstructWindowChain(handlerChain)
 
    print("  Handler Chain at start:")
    print(handlerChain.ToString())
 
    # Now pass messages to the windows.
 
    print("  Select Window 2")
    handlerChain.SendMessage(Message(MessageType.ButtonDown, MessagePosition(22, 1)))
    handlerChain.SendMessage(Message(MessageType.ButtonUp, MessagePosition(22, 1)))
    print("  Current handler chain:")
    print(handlerChain.ToString())
 
    print("  Select Window 3")
    handlerChain.SendMessage(Message(MessageType.ButtonDown, MessagePosition(35, 11)))
    handlerChain.SendMessage(Message(MessageType.ButtonUp, MessagePosition(35, 11)))
    print("  Current handler chain:")
    print(handlerChain.ToString())
 
    print("  Select Window 1")
    handlerChain.SendMessage(Message(MessageType.ButtonDown, MessagePosition(4, 4)))
    handlerChain.SendMessage(Message(MessageType.ButtonUp, MessagePosition(4, 4)))
    print("  Current handler chain:")
    print(handlerChain.ToString())
 
    print("  Close Window 2")
    handlerChain.SendMessage(Message(MessageType.ButtonDown, MessagePosition(24, 0)))
    handlerChain.SendMessage(Message(MessageType.ButtonUp, MessagePosition(24, 0)))
    print("  Current handler chain:")
    print(handlerChain.ToString())
 
    print("  Done.")
# ! [Using HandlerChain in Python]