Fix up review comments

openlp/core/lib/eventreceiver.py

@@ -219,6 +219,11 @@ class EventReceiver(QtCore.QObject):
     ``cursor_normal``
         Resets the cursor to default
 
+
+    ``maindisplay_css_updated``
+        CSS has been updated which needs to be changed on the main display.
+
+
     """
     def __init__(self):
         """

openlp/core/lib/pluginmanager.py

@@ -44,6 +44,9 @@ class PluginManager(object):
 
     @staticmethod
     def get_instance():
+        """
+        Obtain a single instance of class.
+        """
         return PluginManager.instance
 
     def __init__(self, plugin_dir):

openlp/core/ui/maindisplay.py

@@ -82,7 +82,7 @@ class MainDisplay(QtGui.QGraphicsView):
                 QtCore.SIGNAL(u'openlp_phonon_creation'),
                 self.createMediaObject)
             QtCore.QObject.connect(Receiver.get_receiver(),
-                QtCore.SIGNAL(u'css_update'), self.cssChanged)
+                QtCore.SIGNAL(u'maindisplay_css_updated'), self.cssChanged)
             QtCore.QObject.connect(Receiver.get_receiver(),
                 QtCore.SIGNAL(u'config_updated'), self.configChanged)
 

openlp/plugins/alerts/alertsplugin.py

@@ -179,18 +179,33 @@ class AlertsPlugin(Plugin):
         }
 
     def getDisplayJavaScript(self):
+        """
+        Add Javascript to the main display.
+        """
         return JAVASCRIPT
 
     def getDisplayCss(self):
+        """
+        Add CSS to the main display.
+        """
         align = VerticalType.Names[self.settings_tab.location]
         return CSS % (align, self.settings_tab.font_face,
             self.settings_tab.font_size, self.settings_tab.font_color,
             self.settings_tab.bg_color)
 
     def getDisplayHtml(self):
+        """
+        Add HTML to the main display.
+        """
         return HTML
 
     def refreshCss(self, frame):
+        """
+        Trigger an update of the CSS in the maindisplay.
+
+        `frame`
+            The Web frame holding the page
+        """
         align = VerticalType.Names[self.settings_tab.location]
         frame.evaluateJavaScript(u'update_css("%s", "%s", "%s", "%s", "%s")' %
             (align, self.settings_tab.font_face, self.settings_tab.font_size,

openlp/plugins/alerts/lib/alertstab.py

@@ -191,7 +191,7 @@ class AlertsTab(SettingsTab):
         settings.setValue(u'location', QtCore.QVariant(self.location))
         settings.endGroup()
         if self.changed:
-             Receiver.send_message(u'css_update')
+             Receiver.send_message(u'maindisplay_css_updated')
         self.changed = False
 
     def updateDisplay(self):