twblue/src/keyboard_handler/osx.py

from AppKit import *
from PyObjCTools import AppHelper
from Carbon.CarbonEvt import RegisterEventHotKey, GetApplicationEventTarget
from Carbon.Events import cmdKey, controlKey
import struct
from threading import Thread

from main import KeyboardHandler

kEventHotKeyPressedSubtype = 6
kEventHotKeyReleasedSubtype = 9

class OSXKeyboardHandler(KeyboardHandler):

    def __init__(self):
        super(OSXKeyboardHandler, self).__init__()
        self.replacement_keys = dict()
        self.app = KeyboardCapturingNSApplication.alloc().init()
        self._event_thread = Thread(target=AppHelper.runEventLoop)
        self._event_thread.start()

    def register_key (self, key, function):
        super(OSXKeyboardHandler, self).register_key(key, function)
        k, m = self.parse_key(key)
        key_id = RegisterEventHotKey(k, m, (0, 0), GetApplicationEventTarget(), 0)
        self.key_ids[key] = key_id

    def unregister_key (self, key, function):
        super(OSXKeyboardHandler, self).unregister_key(key, function)
        key_id = self.key_ids[key]
        raise NotImplementedError

    def parse_key (self, key):
        key=key.split("+")
    #replacements
    #Modifier keys:
        for index, item in enumerate(key[0:-1]):
            if self.replacement_mods.has_key(item):
                key[index] = self.replacement_mods[item]
        if self.replacement_keys.has_key(key[-1]):
            key[-1] = self.replacement_keys[key[-1]]
        elif len(key[-1])==1:
            key[-1] = ord(str(key[-1]))-36
        mods = 0
        for i in key[:-1]:
            mods = mods|i
        return [key[-1], mods]

class KeyboardCapturingNSApplication(NSApplication):

    def sendEvent_(self, theEvent):
        if theEvent.type() == NSSystemDefined and theEvent.subtype() == kEventHotKeyPressedSubtype:
            self.activateIgnoringOtherApps_(True)
            NSRunAlertPanel(u'Hot Key Pressed', u'Hot Key Pressed', None, None, None)
            super(NSApplication, self).sendEvent_(theEvent)