def key_handler(self, key_event, state, card, replay_audio):
        """
        Examines the key event to see if the user has triggered one of
        the shortcut options.

        If we do not handle the key here, then it is passed through to
        the normal Anki Reviewer implementation.

        As a special case, if the user sets his/her shortcut to one of
        the built-in audio shorts (i.e. R, F5), will play ALL sounds,
        starting with the built-in ones.
        """

        if state not in ['answer', 'question']:
            return False

        combo = key_event_combo(key_event)
        if not combo:
            return False

        handled = False

        if combo in [Qt.Key_R, Qt.Key_F5]:
            replay_audio()
            handled = True

        question_combo = self._addon.config['tts_key_q']
        if question_combo and combo == question_combo:
            self._play_html('front', card.q(),
                            self._addon.player.otf_shortcut, self._mw)
            handled = True

        answer_combo = self._addon.config['tts_key_a']
        if state == 'answer' and answer_combo and combo == answer_combo:
            self._play_html('back', self._get_answer(card),
                            self._addon.player.otf_shortcut, self._mw)
            handled = True

        return handled 

def keyPressEvent(self, e):
        if e.key() == Qt.Key_A:  # Ctrl/Alt + A 全选
            if e.modifiers() and Qt.ControlModifier:
                self.select_all_btn()
        elif e.key() == Qt.Key_F5:  # 刷新
            self.call_change_tab() 

def _setup_menu(self):
        """ Build Menus
        """
        process_menu = QMenu('&Process')
        process_menu.addAction('Resume', self._on_proc_resume, Qt.Key_F5)
        process_menu.addAction('Restart', self._on_proc_restart, Qt.Key_F9)
        process_menu.addAction('Detach', self._on_detach, Qt.Key_F10)

        process_menu.addSeparator()
        process_menu.addAction('Step', lambda: self.dwarf.dwarf_api('_step'), Qt.Key_F7)
        process_menu.addAction('Step call', lambda: self.dwarf.dwarf_api('_step', 'call'), Qt.Key_F8)
        process_menu.addAction('Step block', lambda: self.dwarf.dwarf_api('_step', 'block'))

        self._menu.append(process_menu)