Fix theme editing display size

openlp/core/lib/rendermanager.py

@@ -84,6 +84,8 @@ class RenderManager(object):
         """
         log.debug(u'Update Display')
         self.calculate_default(self.screens.current[u'size'])
+        self.display = MainDisplay(self, self.screens, False)
+        self.display.setup()
         self.renderer.bg_frame = None
 
     def set_global_theme(self, global_theme, theme_level=ThemeLevel.Global):

openlp/core/ui/maindisplay.py

@@ -275,6 +275,7 @@ class MainDisplay(DisplayWidget):
         preview = QtGui.QImage(self.screen[u'size'].width(),
             self.screen[u'size'].height(),
             QtGui.QImage.Format_ARGB32_Premultiplied)
+        print self.screen
         painter = QtGui.QPainter(preview)
         painter.setRenderHint(QtGui.QPainter.Antialiasing)
         self.frame.render(painter)