fix: allow c before p in axis orders in MDASequenceWidget (#489)

Author: fdrgsp

src/pymmcore_widgets/useq_widgets/_mda_sequence.py

@@ -46,7 +46,6 @@ def _check_order(x: str, first: str, second: str) -> bool:
     for first, second in (
         ("t", "z"),  # t cannot come after z
         ("p", "g"),  # p cannot come after g
-        ("p", "c"),  # p cannot come after c
         ("p", "z"),  # p cannot come after z
         ("g", "z"),  # g cannot come after z
     ):

tests/useq_widgets/test_useq_widgets.py

@@ -121,6 +121,14 @@ def test_data_table(qtbot: QtBot) -> None:
     keep_shutter_open_across=("z",),
 )
 
+MDA_CP = useq.MDASequence(
+    time_plan=useq.TIntervalLoops(interval=timedelta(seconds=2), loops=2),
+    stage_positions=[(0, 0), (100, 100)],
+    channels=[{"config": "DAPI", "exposure": 42}, {"config": "FITC", "exposure": 20}],
+    z_plan=useq.ZRangeAround(range=4, step=0.5),
+    axis_order="tcpz",
+)
+
 
 def test_mda_wdg(qtbot: QtBot):
     wdg = MDASequenceWidget()
@@ -133,6 +141,9 @@ def test_mda_wdg(qtbot: QtBot):
     wdg.setValue(SUB_SEQ)
     assert wdg.value().replace(metadata={}) == SUB_SEQ
 
+    wdg.setValue(MDA_CP)
+    assert wdg.value().replace(metadata={}) == MDA_CP
+
 
 @pytest.mark.parametrize("ext", ["json", "yaml", "foo"])
 def test_mda_wdg_load_save(