Move the remaining hardcoded constants into the configuration file.

dcc/ss.py

@@ -18,26 +18,19 @@ class SS(dcc.doom_base.WadMap):
             pass
 
     def _try_screenshot(self, gravity, yolo):
-        with wand.image.Image(
-            width=dcc.config.THUMB_WIDTH,
-            height=dcc.config.THUMB_HEIGHT,
-            pseudo="x:"
-        ) as img:
+        width = self.thumbnail_width
+        height = self.thumbnail_height
+        with wand.image.Image(width=width, height=height, pseudo="x:") as img:
             img.reset_coords()
-            if (
-                img.size[0] < dcc.config.THUMB_WIDTH
-                or img.size[1] < dcc.config.THUMB_HEIGHT
-            ):
+            if (img.size[0] < width or img.size[1] < height):
                 if not messagebox.askretrycancel(
-                    title="DCC", message="Image too small.  Try again?"
+                    title="DCC",
+                    message=f"Image too small ({img.width}x{img.height})." +
+                            "Try again?"
                 ):
                     sys.exit("Gave up trying to select an image.")
                 return False
-            img.crop(
-                width=dcc.config.THUMB_WIDTH,
-                height=dcc.config.THUMB_HEIGHT,
-                gravity=gravity
-            )
+            img.crop(width=width, height=height, gravity=gravity)
             img.reset_coords()
             if not yolo:
                 wand.display.display(img)