Bump Gaphas to 3.0.0b4

Add callback handlers for Position and original values for Variable and
Matrix.

gaphor/UML/classes/interface.py

@@ -260,7 +260,7 @@ class InterfaceItem(ElementPresentation, Classified):
 
     def pre_update(self, context):
         connected_items = [
-            c.item for c in self._connections.get_connections(connected=self)
+            c.item for c in self.diagram.connections.get_connections(connected=self)
         ]
         connectors = any(
             map(lambda i: isinstance(i.subject, UML.Connector), connected_items)
@@ -332,7 +332,7 @@ class InterfaceItem(ElementPresentation, Classified):
         if connectors is None:
             # distinguish between None and []
             connected_items = [
-                c.item for c in self._connections.get_connections(connected=self)
+                c.item for c in self.diagram.connections.get_connections(connected=self)
             ]
             connectors = any(
                 map(lambda i: isinstance(i.subject, UML.Connector), connected_items)

gaphor/UML/classes/tests/test_association.py

@@ -1,4 +1,4 @@
-"""Unnit tests for AssociationItem."""
+"""Unit tests for AssociationItem."""
 
 from gaphor import UML
 from gaphor.tests import TestCase

gaphor/UML/interactions/lifeline.py

@@ -138,6 +138,7 @@ class LifelineItem(ElementPresentation[UML.Lifeline], Named):
     def __init__(self, diagram, id=None):
         super().__init__(diagram, id)
 
+        self._connections = diagram.connections
         self.is_destroyed = False
 
         self.lifetime = LifetimeItem()

gaphor/core/modeling/presentation.py

@@ -103,7 +103,6 @@ class Presentation(Matrices, Element, Generic[S]):
         if diagram:
             diagram.connections.remove_connections_to_item(self)
             self.unlink()
-            self.handle(DiagramItemDeleted(diagram, self))
         if event.new_value:
             raise ValueError("Can not change diagram for a presentation")
 

gaphor/services/tests/test_undo_presentation.py

@@ -98,7 +98,7 @@ def test_line_handle_position(diagram, undo_manager, event_manager):
 
     undo_manager.undo_transaction()
 
-    assert tuple(handle.pos) == (0, 0)
+    assert handle.pos.tuple() == (0, 0)
 
     undo_manager.redo_transaction()