fixed #1046508 (OSError on changing theme background image)

bzr-revno: 2052
Fixes: https://launchpad.net/bugs/1046508

openlp/core/ui/thememanager.py

@@ -281,9 +281,9 @@ class ThemeManager(QtGui.QWidget):
                     for plugin in self.mainwindow.pluginManager.plugins:
                         if plugin.usesTheme(old_theme_name):
                             plugin.renameTheme(old_theme_name, new_theme_name)
-                    self.loadThemes()
                     self.mainwindow.renderer.update_theme(
                         new_theme_name, old_theme_name)
+                    self.loadThemes()
 
     def onCopyTheme(self):
         """
@@ -314,6 +314,7 @@ class ThemeManager(QtGui.QWidget):
         theme_data.theme_name = new_theme_name
         theme_data.extend_image_filename(self.path)
         self.saveTheme(theme_data, save_from, save_to)
+        self.loadThemes()
 
     def onEditTheme(self):
         """
@@ -331,6 +332,7 @@ class ThemeManager(QtGui.QWidget):
             self.themeForm.exec_(True)
             self.oldBackgroundImage = None
             self.mainwindow.renderer.update_theme(theme.theme_name)
+            self.loadThemes()
 
     def onDeleteTheme(self):
         """
@@ -345,10 +347,10 @@ class ThemeManager(QtGui.QWidget):
             row = self.themeListWidget.row(item)
             self.themeListWidget.takeItem(row)
             self.deleteTheme(theme)
+            self.mainwindow.renderer.update_theme(theme, only_delete=True)
             # As we do not reload the themes, push out the change. Reload the
             # list as the internal lists and events need to be triggered.
             self._pushThemes()
-            self.mainwindow.renderer.update_theme(theme, only_delete=True)
 
     def deleteTheme(self, theme):
         """
@@ -672,7 +674,6 @@ class ThemeManager(QtGui.QWidget):
                 theme.background_filename,
                 ImageSource.Theme, QtGui.QColor(theme.background_border_color))
             self.mainwindow.imageManager.processUpdates()
-        self.loadThemes()
 
     def _writeTheme(self, theme, image_from, image_to):
         """