Fix more bugs

Now it does something.

birdvisu/visualisation/annotators.py

@@ -12,7 +12,7 @@ from PySide6 import QtCore, QtGui, QtWidgets
 
 # Classification
 
-class DifferenceStatus:
+class DifferenceStatus(Enum):
 	"""Describes differences between two topologies"""
 	NORMAL = auto()
 	MISSING = auto()
@@ -109,6 +109,7 @@ def assign_brushes(at):
 		for tags in annot.values():
 			statuses = list(filter(lambda x: isinstance(x, DifferenceStatus), tags))
 			status = statuses[-1] if len(statuses) > 0 else DifferenceStatus.DISCREPANCY # should always have something.
+			print(repr(status))
 			color = {
 				DifferenceStatus.NORMAL: 'black',
 				DifferenceStatus.EXTRA: 'green',
@@ -182,4 +183,5 @@ def create_qgritems(at):
 
 		line = QtWidgets.QGraphicsLineItem(rpos.x, rpos.y, npos.x, npos.y)
 		at.link_annotations[lk].append(line)
+	return at
 

poor_mans_visualisation.py

@@ -29,6 +29,14 @@ final_topo = combiner.get_complete_topology()
 
 from birdvisu.visualisation import annotators
 
+def dbg_ann(at):
+	print('hello')
+	return at
+
+# annotators.create_qgritems does not like being run without Qt initialization.
+from PySide6 import QtCore, QtGui, QtWidgets
+app = QtWidgets.QApplication([])
+
 annotated_topology = maps_new.annotate_topology(final_topo,
 			# A semi-canonical set of annotators:
 			[
@@ -40,11 +48,9 @@ annotated_topology = maps_new.annotate_topology(final_topo,
 				]
 			)
 
-# Render the widget
 
-from PySide6 import QtCore, QtGui, QtWidgets
+# Render the widget
 
-app = QtWidgets.QApplication([])
 scene = QtWidgets.QGraphicsScene()
 
 for tagsrc in [