Make Phonon optional

Fixes: https://launchpad.net/bugs/1224404

openlp/core/ui/maindisplay.py

@@ -33,7 +33,13 @@ import cgi
 import logging
 
 from PyQt4 import QtCore, QtGui, QtWebKit, QtOpenGL
+
+PHONON_AVAILABLE = True
+try:
     from PyQt4.phonon import Phonon
+except ImportError:
+    PHONON_AVAILABLE = False
+PHONON_AVAILABLE = False
 
 from openlp.core.common import Registry, RegistryProperties, OpenLPMixin, Settings, translate, is_macosx
 from openlp.core.lib import ServiceItem, ImageSource, ScreenList, build_html, expand_tags, image_to_byte
@@ -139,7 +145,7 @@ class MainDisplay(OpenLPMixin, Display, RegistryProperties):
         self.override = {}
         self.retranslateUi()
         self.media_object = None
-        if self.is_live:
+        if self.is_live and PHONON_AVAILABLE:
             self.audio_player = AudioPlayer(self)
         else:
             self.audio_player = None

openlp/core/ui/slidecontroller.py

@@ -580,6 +580,7 @@ class SlideController(DisplayController, RegistryProperties):
         self.display.setup()
         if self.is_live:
             self.__add_actions_to_widget(self.display)
+        if self.display.audio_player:
             self.display.audio_player.connectSlot(QtCore.SIGNAL('tick(qint64)'), self.on_audio_time_remaining)
         # The SlidePreview's ratio.
         try:
@@ -834,6 +835,7 @@ class SlideController(DisplayController, RegistryProperties):
         self.slide_list = {}
         if self.is_live:
             self.song_menu.menu().clear()
+            if self.display.audio_player:
                 self.display.audio_player.reset()
                 self.set_audio_items_visibility(False)
                 self.audio_pause_item.setChecked(False)

tests/functional/openlp_core_ui/test_slidecontroller.py

@@ -479,6 +479,34 @@ class TestSlideController(TestCase):
         mocked_preview_widget.current_slide_number.assert_called_with()
         mocked_process_item.assert_called_once_with(mocked_item, 7)
 
+    def on_slide_blank_test(self):
+        """
+        Test on_slide_blank
+        """
+        # GIVEN: An instance of SlideController and a mocked on_blank_display
+        slide_controller = SlideController(None)
+        slide_controller.on_blank_display = MagicMock()
+
+        # WHEN: Calling on_slide_blank
+        slide_controller.on_slide_blank()
+
+        # THEN: on_blank_display should have been called with True
+        slide_controller.on_blank_display.assert_called_once_with(True)
+
+    def on_slide_unblank_test(self):
+        """
+        Test on_slide_unblank
+        """
+        # GIVEN: An instance of SlideController and a mocked on_blank_display
+        slide_controller = SlideController(None)
+        slide_controller.on_blank_display = MagicMock()
+
+        # WHEN: Calling on_slide_unblank
+        slide_controller.on_slide_unblank()
+
+        # THEN: on_blank_display should have been called with False
+        slide_controller.on_blank_display.assert_called_once_with(False)
+
     def on_slide_selected_index_no_service_item_test(self):
         """
         Test that when there is no service item, the on_slide_selected_index() method returns immediately