Merge pull request #52 from ladisk/selection_upgrade

Now added:
`SelectionGUI`:
- Updated filtering interface
- Updated brush selection
- Added point retrieval methods: `get_selected_points` (all points from selection mode) and `get_filtered_points` (points that were filtered).
- Calling `Points.points` (where `Points` is instance of `SelectionGUI`) returns the filtered points, but if they do not exist (no filtering was done), all selected points are returned.

`ResultViewer`:
- Mode shape visualization
- Export to MP4 (with frame range and region selection)

Author: jankoslavic

pyidi/GUIs/__init__.py

@@ -0,0 +1,29 @@
+import typing
+
+try:
+    import PyQt6
+
+    HAS_PYQT6 = True
+except ImportError:
+    HAS_PYQT6 = False
+
+if HAS_PYQT6 or typing.TYPE_CHECKING:
+    from .subset_selection import SelectionGUI
+    from .result_viewer import ResultViewer
+else:
+    class SelectionGUI:
+        def __init__(self, video):
+            pass
+            
+        def show_displacement(self, data):
+            raise RuntimeError("SelectionGUI requires PyQt6: pip install pyidi[qt]")
+    
+    class ResultViewer:
+        def __init__(self):
+            pass
+            
+        def show_displacement(self, data):
+            raise RuntimeError("ResultViewer requires PyQt6: pip install pyidi[qt]")
+        
+from .selection import SubsetSelection
+from .gui import GUI

pyidi/gui.py renamed to pyidi/GUIs/gui.py

@@ -6,10 +6,10 @@
 import warnings
 warnings.simplefilter("default")
 
-from . import tools
+from .. import tools
 from . import selection
-from .methods import SimplifiedOpticalFlow
-from .methods import LucasKanade
+from ..methods import SimplifiedOpticalFlow
+from ..methods import LucasKanade
 
 NO_METHOD = '---'
 add_vertical_stretch = True