Unknown player handling with extra event

Readme.md

@@ -80,8 +80,9 @@ An input class has two functions which are called while a question is on
 display:
 
  - `buzzersOpen(isOpen)` is called, when the question is first displayed,
-    when the question is reopened after a false answer and when the question is
-	closed after either a correct answer or no answer at all.
+    when the question is reopened after a false answer, when the question is
+	closed after either a correct answer or no answer at all or when a
+	button for an unknown player was submitted.
 
  - `playerGotQuestion(playerNo)` is called, whenever a player pressed
     their button *and* got the turn to answer. Note that no extra

windows.py

@@ -127,14 +127,24 @@ class QuestionWindow(QtGui.QDialog):
 						# restart music if question was not answered
 						MusicBox.play_music("%s-%s" % (self.section, self.qnumber))
 
+			elif e.get_playerno() > len(self.players) and not self._inWindow:
+				# unknown player! to not confuse certain devices we send a buttons open event
+				self.buzzersOpen.emit(True)
+				print("unknown player", e.get_playerno())
+
+
 			return True
 		else:
-			if not self._windowSetup and e.type() == QtCore.QEvent.Show:
+			ret =  super(QuestionWindow, self).event(e)
+
+			# we want to do this after the window has focus for the first time
+			if not self._windowSetup and e.type() == QtCore.QEvent.FocusIn:
 				if not self.answers.is_answered():
 					self.buzzersOpen.emit(True)
 				self._windowSetup = True
 
-			return super(QuestionWindow, self).event(e)
+			return ret
+
 
 	def keyPressEvent(self, e):
 		if e.key() == QtCore.Qt.Key_Escape: