Added handling of missing optional dependencies in gui and subsetGUI.

Author: klemengit

pyidi/GUIs/gui.py

@@ -1,11 +1,24 @@
 import numpy as np
-import napari
-from magicgui import magicgui
+import importlib
 import sys
-from qtpy.QtWidgets import QTextEdit, QVBoxLayout, QWidget, QApplication
 import warnings
 warnings.simplefilter("default")
 
+
+packages = ["napari", "magicgui"]
+missing = [pkg for pkg in packages if importlib.util.find_spec(pkg) is None]
+
+if missing:
+    raise ImportError(
+        f"Missing required optional dependency for 'napari': "
+        f"{', '.join(missing)}\n"
+        f"Install with: pip install pyidi[napari]"
+    )
+
+import napari
+from magicgui import magicgui
+from qtpy.QtWidgets import QTextEdit, QVBoxLayout, QWidget, QApplication
+
 from .. import tools
 from . import selection
 from ..methods import SimplifiedOpticalFlow

pyidi/GUIs/subset_selection.py

@@ -1,10 +1,21 @@
 import sys
 import numpy as np
+from matplotlib.path import Path
+import importlib
+
+packages = ["pyqt6", "pyqtgraph"]
+missing = [pkg for pkg in packages if importlib.util.find_spec(pkg) is None]
+
+if missing:
+    raise ImportError(
+        f"Missing required optional dependency for 'qt': "
+        f"{', '.join(missing)}\n"
+        f"Install with: pip install pyidi[qt]"
+    )
+
 from PyQt6 import QtWidgets, QtCore
 from pyqtgraph import GraphicsLayoutWidget, ImageItem, ScatterPlotItem
 import pyqtgraph as pg
-from matplotlib.path import Path
-# import pyidi  # Assuming pyidi is a custom module for video handling
 
 class BrushViewBox(pg.ViewBox):
     def __init__(self, parent_gui, *args, **kwargs):