Update service items on service load

openlp/core/lib/eventreceiver.py

@@ -193,6 +193,14 @@ class EventReceiver(QtCore.QObject):
     ``{plugin}_add_service_item``
         Ask the plugin to push the selected items to the service item
 
+    ``{plugin}_service_load``
+        Ask the plugin to process an individual service item after it has been
+        loaded
+
+    ``service_item_update``
+        Passes back to the service manager the service item after it has been
+        processed by the plugin
+
     ``alerts_text``
         Displays an alert message
 

openlp/core/lib/mediamanageritem.py

@@ -32,7 +32,8 @@ import os
 from PyQt4 import QtCore, QtGui
 
 from openlp.core.lib import context_menu_action, context_menu_separator, \
-    SettingsManager, OpenLPToolbar, ServiceItem, build_icon, translate
+    SettingsManager, OpenLPToolbar, ServiceItem, build_icon, translate, \
+    Receiver
 
 log = logging.getLogger(__name__)
 
@@ -119,6 +120,9 @@ class MediaManagerItem(QtGui.QWidget):
         self.requiredIcons()
         self.setupUi()
         self.retranslateUi()
+        QtCore.QObject.connect(Receiver.get_receiver(),
+            QtCore.SIGNAL(u'%s_service_load' % self.parent.name.lower()),
+            self.serviceLoad)
 
     def requiredIcons(self):
         """
@@ -540,3 +544,11 @@ class MediaManagerItem(QtGui.QWidget):
             return service_item
         else:
             return None
+
+    def serviceLoad(self, message):
+        """
+        Method to add processing when a service has been loaded and
+        individual service items need to be processed by the plugins
+        """
+        pass
+

openlp/core/lib/serviceitem.py

@@ -58,6 +58,9 @@ class ItemCapabilities(object):
     AllowsLoop = 5
     AllowsAdditions = 6
     NoLineBreaks = 7
+    OnLoadUpdate = 8
+    AddIfNewItem = 9
+
 
 class ServiceItem(object):
     """
@@ -98,6 +101,7 @@ class ServiceItem(object):
         self.main = None
         self.footer = None
         self.bg_image_bytes = None
+        self._new_item()
 
     def _new_item(self):
         """

openlp/core/ui/servicemanager.py

@@ -223,6 +223,8 @@ class ServiceManager(QtGui.QWidget):
             QtCore.SIGNAL(u'config_updated'), self.regenerateServiceItems)
         QtCore.QObject.connect(Receiver.get_receiver(),
             QtCore.SIGNAL(u'theme_update_global'), self.themeChange)
+        QtCore.QObject.connect(Receiver.get_receiver(),
+            QtCore.SIGNAL(u'service_item_update'), self.serviceItemUpdate)
         # Last little bits of setting up
         self.service_theme = unicode(QtCore.QSettings().value(
             self.parent.serviceSettingsSection + u'/service theme',
@@ -711,6 +713,9 @@ class ServiceManager(QtGui.QWidget):
                         serviceitem.set_from_service(item, self.servicePath)
                         self.validateItem(serviceitem)
                         self.addServiceItem(serviceitem)
+                        if serviceitem.is_capable(ItemCapabilities.OnLoadUpdate):
+                            Receiver.send_message(u'%s_service_load' %
+                                serviceitem.name.lower(), serviceitem)
                     try:
                         if os.path.isfile(p_file):
                             os.remove(p_file)
@@ -801,6 +806,14 @@ class ServiceManager(QtGui.QWidget):
             # does not impact the saved song so True may also be valid
             self.parent.serviceChanged(False, self.serviceName)
 
+    def serviceItemUpdate(self, message):
+        """
+        Triggered from plugins to update service items.
+        """
+        print message
+        for item in self.serviceItems:
+            print item[u'service_item'].title, item[u'service_item']._uuid
+
     def addServiceItem(self, item, rebuild=False, expand=True, replace=False):
         """
         Add a Service item to the list

openlp/plugins/songs/lib/mediaitem.py

@@ -324,6 +324,8 @@ class SongMediaItem(MediaManagerItem):
         service_item.add_capability(ItemCapabilities.AllowsEdit)
         service_item.add_capability(ItemCapabilities.AllowsPreview)
         service_item.add_capability(ItemCapabilities.AllowsLoop)
+        service_item.add_capability(ItemCapabilities.OnLoadUpdate)
+        service_item.add_capability(ItemCapabilities.AddIfNewItem)
         song = self.parent.manager.get_object(Song, item_id)
         service_item.theme = song.theme_name
         service_item.editId = item_id
@@ -371,3 +373,10 @@ class SongMediaItem(MediaManagerItem):
             song.title, author_audit, song.copyright, unicode(song.ccli_number)
         ]
         return True
+
+    def serviceLoad(self, item):
+        """
+        Triggered by a song being loaded by the service item
+        """
+        Receiver.send_message(u'service_item_update', u'0:0')
+