Catch missing core in config

src/pymmcore_widgets/_icons.py

@@ -53,15 +53,18 @@ def __str__(self) -> str:
         return self.value
 
     @classmethod
-    def for_device_type(cls, device_type: DeviceType | str) -> StandardIcon:
+    def for_device_type(
+        cls, device_type: DeviceType | str, mmcore: CMMCorePlus | None = None
+    ) -> StandardIcon:
         """Return an icon for a specific device type.
 
         If a string is provided, it will be resolved to a DeviceType using the
         CMMCorePlus.instance.
         """
         if isinstance(device_type, str):  # device label
+            core = mmcore or CMMCorePlus.instance()
             try:
-                device_type = CMMCorePlus.instance().getDeviceType(device_type)
+                device_type = core.getDeviceType(device_type)
             except Exception:  # pragma: no cover
                 device_type = DeviceType.Unknown
 

src/pymmcore_widgets/_models/_config_group_pivot_model.py

@@ -2,6 +2,7 @@
 
 from typing import TYPE_CHECKING, Any
 
+from pymmcore_plus import CMMCorePlus
 from qtpy.QtCore import QAbstractTableModel, QModelIndex, QSize, Qt
 
 from pymmcore_widgets._icons import StandardIcon
@@ -16,8 +17,11 @@
 class ConfigGroupPivotModel(QAbstractTableModel):
     """Pivot a single ConfigGroup into rows=Device/Property, cols=Presets."""
 
-    def __init__(self, parent: QWidget | None = None) -> None:
+    def __init__(
+        self, parent: QWidget | None = None, mmcore: CMMCorePlus | None = None
+    ) -> None:
         super().__init__(parent)
+        self._mmcore = mmcore or CMMCorePlus.instance()
         self._src: QConfigGroupsModel | None = None
         self._gidx: QModelIndex | None = None
         self._presets: list[ConfigPreset] = []
@@ -155,7 +159,7 @@ def headerData(
                     dev, _prop = self._rows[section]
                 except IndexError:  # pragma: no cover
                     return None
-                if icon := StandardIcon.for_device_type(dev):
+                if icon := StandardIcon.for_device_type(dev, self._mmcore):
                     return icon.icon().pixmap(QSize(16, 16))
         return None
 

src/pymmcore_widgets/config_presets/_views/_config_groups_tree.py

@@ -21,14 +21,16 @@ def create_from_core(
         cls, core: CMMCorePlus, parent: QWidget | None = None
     ) -> ConfigGroupsTree:
         """Create a ConfigGroupsTree from a CMMCorePlus instance."""
-        obj = cls(parent)
+        obj = cls(parent, core)
         model = QConfigGroupsModel.create_from_core(core)
         obj.setModel(model)
         return obj
 
-    def __init__(self, parent: QWidget | None = None) -> None:
+    def __init__(
+        self, parent: QWidget | None = None, core: CMMCorePlus | None = None
+    ) -> None:
         super().__init__(parent)
-        self.setItemDelegateForColumn(2, PropertySettingDelegate(self))
+        self.setItemDelegateForColumn(2, PropertySettingDelegate(self, mmcore=core))
 
     def setModel(self, model: QAbstractItemModel | None) -> None:
         """Set the model for the tree view."""

src/pymmcore_widgets/config_presets/_views/_config_presets_table.py

@@ -3,6 +3,7 @@
 from contextlib import suppress
 from typing import TYPE_CHECKING
 
+from pymmcore_plus import CMMCorePlus
 from qtpy.QtCore import (
     QAbstractItemModel,
     QModelIndex,
@@ -19,7 +20,6 @@
 from ._property_setting_delegate import PropertySettingDelegate
 
 if TYPE_CHECKING:
-    from pymmcore_plus import CMMCorePlus
     from PyQt6.QtGui import QAction
 
 else:
@@ -36,16 +36,19 @@ class ConfigPresetsTableView(QTableView):
     `setGroup` with the name or index of the group you want to view.
     """
 
-    def __init__(self, parent: QWidget | None = None) -> None:
+    def __init__(
+        self, parent: QWidget | None = None, mmcore: CMMCorePlus | None = None
+    ) -> None:
         super().__init__(parent)
-        self.setItemDelegate(PropertySettingDelegate(self))
+        self._mmcore = mmcore or CMMCorePlus.instance()
+        self.setItemDelegate(PropertySettingDelegate(self, mmcore=mmcore))
         self._transpose_proxy: QTransposeProxyModel | None = None
         self._pivot_model: ConfigGroupPivotModel | None = None
 
     def setModel(self, model: QAbstractItemModel | None) -> None:
         """Set the model for the table view."""
         if isinstance(model, QConfigGroupsModel):
-            matrix = ConfigGroupPivotModel()
+            matrix = ConfigGroupPivotModel(mmcore=self._mmcore)
             matrix.setSourceModel(model)
         elif isinstance(model, ConfigGroupPivotModel):  # pragma: no cover
             matrix = model
@@ -151,14 +154,16 @@ def create_from_core(
         cls, core: CMMCorePlus, parent: QWidget | None = None
     ) -> ConfigPresetsTable:
         """Create a PresetsTable from a CMMCorePlus instance."""
-        obj = cls(parent)
+        obj = cls(parent, core)
         model = QConfigGroupsModel.create_from_core(core)
         obj.setModel(model)
         return obj
 
-    def __init__(self, parent: QWidget | None = None) -> None:
+    def __init__(
+        self, parent: QWidget | None = None, mmcore: CMMCorePlus | None = None
+    ) -> None:
         super().__init__(parent)
-        self.view = ConfigPresetsTableView(self)
+        self.view = ConfigPresetsTableView(self, mmcore=mmcore)
 
         self._toolbar = tb = QToolBar(self)
         tb.setIconSize(QSize(16, 16))

src/pymmcore_widgets/config_presets/_views/_property_setting_delegate.py

@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+from pymmcore_plus import CMMCorePlus
 from qtpy.QtCore import QAbstractItemModel, QModelIndex, Qt
 from qtpy.QtWidgets import QStyledItemDelegate, QStyleOptionViewItem, QWidget
 
@@ -10,6 +11,12 @@
 class PropertySettingDelegate(QStyledItemDelegate):
     """Item delegate that uses a PropertyWidget for editing PropertySetting values."""
 
+    def __init__(
+        self, parent: QWidget | None = None, mmcore: CMMCorePlus | None = None
+    ) -> None:
+        super().__init__(parent)
+        self._mmcore = mmcore or CMMCorePlus.instance()
+
     def createEditor(
         self, parent: QWidget | None, option: QStyleOptionViewItem, index: QModelIndex
     ) -> QWidget | None:
@@ -21,6 +28,7 @@ def createEditor(
             setting.device_label,
             setting.property_name,
             parent=parent,
+            mmcore=self._mmcore,
             connect_core=False,
         )
         widget.setValue(setting.value)  # avoids commitData warnings