Customizable background color for viewer

README.md

@@ -31,6 +31,7 @@ The supported configuration settings are:
   "orientation": "portrait", // default: landscape
   "pen_size": 10, // set to 0 to disable
   "pen_color": "red",
+  "background_color": "black", // default: white
   "fetch_frame_delay": 0.03 // sleep 0.03s on remarkable before fetching new frame (default is no delay)
   "lz4_path_on_remarkable": "/usr/opt/lz4" // default: $HOME/lz4
 }

src/rmview.py

@@ -57,6 +57,8 @@ class rMViewApp(QApplication):
     self.setWindowIcon(QIcon(':/assets/rmview.svg'))
 
     self.viewer = QtImageViewer()
+    if 'bg_color' in self.config:
+      self.viewer.setBackgroundBrush(QBrush(QColor(self.config.get('background_color'))))
     act = QAction('Clone current frame', self)
     act.triggered.connect(self.cloneViewer)
     self.viewer.menu.addSeparator()