node leaf sorting

backend/node_menu.py

@@ -86,14 +86,13 @@ for category, class_names in MENU_LAYOUT.items():
         }
 
 
-def get_menu_metadata(class_name: str, fallback_category: str = "uncategorized") -> dict[str, Any]:
+def get_menu_metadata(class_name: str) -> dict[str, Any]:
     metadata = _NODE_METADATA.get(class_name)
     if metadata is not None:
         return dict(metadata)
 
-    fallback_order = _CATEGORY_ORDER.get(fallback_category, len(_CATEGORY_ORDER))
     return {
-        "category": fallback_category,
+        "category": "Unsorted",
-        "category_order": fallback_order,
+        "category_order": len(_CATEGORY_ORDER),
         "menu_order": 10_000,
     }

backend/node_registry.py

@@ -39,7 +39,7 @@ def get_node_info(class_name: str) -> dict[str, Any]:
     """
     cls = NODE_CLASS_MAPPINGS[class_name]
     input_types: dict = cls.INPUT_TYPES()
-    menu_metadata = get_menu_metadata(class_name, getattr(cls, "CATEGORY", "uncategorized"))
+    menu_metadata = get_menu_metadata(class_name)
 
     return {
         "name": class_name,

backend/nodes/analysis.py

@@ -33,7 +33,7 @@ class Statistics:
     RETURN_TYPES = ("MEASURE_TABLE",)
     RETURN_NAMES = ("stats",)
     FUNCTION = "process"
-    CATEGORY = "analysis"
+
     DESCRIPTION = (
         "Compute basic surface statistics: min, max, mean, RMS roughness, median, "
         "and skewness. Equivalent to gwy_data_field_get_min/max/avg/rms."
@@ -82,7 +82,7 @@ class Histogram:
     RETURN_TYPES = ("MEASURE_TABLE", "COORDPAIR",)
     RETURN_NAMES = ("measurements", "marker pair",)
     FUNCTION = "process"
-    CATEGORY = "analysis"
+
     DESCRIPTION = (
         "Compute the height distribution histogram (DH). "
         "Use log scale to reveal small peaks next to a dominant background. "
@@ -185,7 +185,7 @@ class Cursors:
     RETURN_TYPES = ("MEASURE_TABLE","COORDPAIR",)
     RETURN_NAMES = ("measurement","coord pair",)
     FUNCTION = "process"
-    CATEGORY = "analysis"
+
     DESCRIPTION = (
         "Place two cursors on a line plot or 2D field. "
         "On lines it reports x/y positions and dx/dy. "
@@ -353,7 +353,7 @@ class FFT2D:
     RETURN_TYPES = ("DATA_FIELD", "DATA_FIELD", "DATA_FIELD", "DATA_FIELD")
     RETURN_NAMES = ("log_magnitude", "magnitude", "phase", "psdf")
     FUNCTION = "process"
-    CATEGORY = "analysis"
+
     DESCRIPTION = (
         "Compute the 2D FFT with optional windowing and mean/plane subtraction. "
         "Outputs log magnitude, magnitude, phase, and PSDF as separate channels. "
@@ -511,7 +511,7 @@ class InverseFFT2D:
     RETURN_TYPES = ("DATA_FIELD",)
     RETURN_NAMES = ("image",)
     FUNCTION = "process"
-    CATEGORY = "analysis"
+
     DESCRIPTION = (
         "Reconstruct a spatial-domain image from a 2D frequency spectrum. "
         "For exact reconstruction, connect magnitude/phase (or log magnitude/phase, "
@@ -658,7 +658,7 @@ class CrossSection:
     RETURN_TYPES = ("LINE", "COORDPAIR",)
     RETURN_NAMES = ("profile", "marker pair",)
     FUNCTION = "process"
-    CATEGORY = "analysis"
+
     DESCRIPTION = (
         "Extract a cross-section profile along a line between two points. "
         "Drag the markers on the image to set the line endpoints. "
@@ -1010,7 +1010,7 @@ class Stats:
     RETURN_TYPES = ("FLOAT",)
     RETURN_NAMES = ("value",)
     FUNCTION = "process"
-    CATEGORY = "analysis"
+
     DESCRIPTION = (
         "Compute a contextual scalar statistic from a LINE, record table, DATA_FIELD, or IMAGE. "
         "The available operations adapt to the connected input type."

backend/nodes/display.py

@@ -348,7 +348,7 @@ class ColorMap:
     RETURN_TYPES = ("COLORMAP",)
     RETURN_NAMES = ("colormap",)
     FUNCTION = "build"
-    CATEGORY = "display"
+
     DESCRIPTION = (
         "Build a reusable colormap. Choose a preset, or create a custom gradient with min/max colours "
         "and any number of intermediate stops."
@@ -389,7 +389,7 @@ class Font:
     RETURN_TYPES = ("FONT",)
     RETURN_NAMES = ("font",)
     FUNCTION = "build"
-    CATEGORY = "display"
+
     DESCRIPTION = (
         "Build a reusable font spec for annotation overlays. Choose a discovered system font, "
         "use the default fallback stack, or point to a custom font file."
@@ -429,7 +429,7 @@ class Annotations:
     RETURN_TYPES = ("DATA_FIELD",)
     RETURN_NAMES = ("annotated",)
     FUNCTION = "render"
-    CATEGORY = "display"
+
     DESCRIPTION = (
         "Attach optional publication-style annotations to a DATA_FIELD without flattening the raw data. "
         "The preview shows a scale bar and/or side colour legend, while downstream field operations keep the underlying AFM values."
@@ -488,7 +488,7 @@ class Markup:
     RETURN_TYPES = ("DATA_FIELD",)
     RETURN_NAMES = ("annotated",)
     FUNCTION = "process"
-    CATEGORY = "display"
+
     DESCRIPTION = (
         "Draw simple vector markup over a DATA_FIELD without flattening the underlying data. "
         "Choose a shape mode, colour, and stroke width, then drag directly on the preview to place lines, rectangles, circles, or arrows."
@@ -549,7 +549,7 @@ class PreviewImage:
 
     RETURN_TYPES = ()
     FUNCTION = "preview"
-    CATEGORY = "display"
+
     OUTPUT_NODE = True
     DESCRIPTION = "Display an IMAGE or DATA_FIELD as a coloured thumbnail. Connect either input."
 
@@ -614,7 +614,7 @@ class View3D:
 
     RETURN_TYPES = ()
     FUNCTION = "render"
-    CATEGORY = "display"
+
     OUTPUT_NODE = True
     DESCRIPTION = (
         "Interactive 3D surface view of a DATA_FIELD. "
@@ -691,7 +691,7 @@ class PrintTable:
 
     RETURN_TYPES = ()
     FUNCTION = "print_table"
-    CATEGORY = "display"
+
     OUTPUT_NODE = True
     DESCRIPTION = "Send a measurement or record table to the browser as a WebSocket message for display."
 
@@ -724,7 +724,7 @@ class ValueDisplay:
     RETURN_TYPES = ("FLOAT",)
     RETURN_NAMES = ("value",)
     FUNCTION = "display_value"
-    CATEGORY = "display"
+
     DESCRIPTION = "Display a FLOAT, or a selected numeric row from a measurement table, and pass the value through unchanged."
 
     _broadcast_value_fn = None

backend/nodes/filters.py

@@ -34,7 +34,7 @@ class GaussianFilter:
     RETURN_TYPES = ("DATA_FIELD",)
     RETURN_NAMES = ("filtered",)
     FUNCTION = "process"
-    CATEGORY = "filters"
+
     DESCRIPTION = "Apply a Gaussian blur. Equivalent to gwy_data_field_filter_gaussian."
 
     def process(self, field: DataField, sigma: float) -> tuple:
@@ -61,7 +61,7 @@ class MedianFilter:
     RETURN_TYPES = ("DATA_FIELD",)
     RETURN_NAMES = ("filtered",)
     FUNCTION = "process"
-    CATEGORY = "filters"
+
     DESCRIPTION = "Apply a median filter. Equivalent to gwy_data_field_filter_median."
 
     def process(self, field: DataField, size: int) -> tuple:
@@ -90,7 +90,7 @@ class EdgeDetect:
     RETURN_TYPES = ("DATA_FIELD",)
     RETURN_NAMES = ("edges",)
     FUNCTION = "process"
-    CATEGORY = "filters"
+
     DESCRIPTION = (
         "Detect edges using Sobel, Prewitt, Laplacian, or LoG operators. "
         "Equivalent to gwy_data_field_filter_sobel / gwy_data_field_filter_laplacian."
@@ -229,7 +229,7 @@ class FFTFilter1D:
     RETURN_TYPES = ("LINE",)
     RETURN_NAMES = ("filtered",)
     FUNCTION = "process"
-    CATEGORY = "filters"
+
     DESCRIPTION = (
         "Frequency-domain filtering of a 1-D line profile. "
         "Supports lowpass, highpass, bandpass, and notch (band-reject) modes "
@@ -295,7 +295,7 @@ class FFTFilter2D:
     RETURN_TYPES = ("DATA_FIELD",)
     RETURN_NAMES = ("filtered",)
     FUNCTION = "process"
-    CATEGORY = "filters"
+
     DESCRIPTION = (
         "Frequency-domain filtering of a 2-D data field. "
         "Supports lowpass, highpass, bandpass, and notch (band-reject) modes "

backend/nodes/io.py

@@ -147,7 +147,7 @@ class Image:
     RETURN_TYPES = ("DATA_FIELD",)
     RETURN_NAMES = ("field",)
     FUNCTION = "load"
-    CATEGORY = "io"
+
     DESCRIPTION = (
         "Load any supported file. "
         "SPM formats (.gwy, .sxm, .ibw) provide calibrated dimensions; "
@@ -384,7 +384,7 @@ class ImageDemo:
     RETURN_TYPES = ("DATA_FIELD",)
     RETURN_NAMES = ("field",)
     FUNCTION = "load"
-    CATEGORY = "io"
+
     DESCRIPTION = "Load a bundled demo file so you can try the app without providing your own data."
 
     def load(self, name: str = "", colormap: str = "viridis", colormap_map=None):
@@ -408,7 +408,7 @@ class Folder:
     RETURN_TYPES = ("DIRECTORY",)
     RETURN_NAMES = ("directory",)
     FUNCTION = "list_files"
-    CATEGORY = "io"
+
     DESCRIPTION = (
         "Pick a folder and output its directory path plus one file socket per compatible image, array, or SPM file inside it. "
         "Supported files include common images, .npy/.npz arrays, and .gwy/.sxm/.ibw scans."
@@ -441,7 +441,7 @@ class Coordinate:
     RETURN_TYPES = ("COORD",)
     RETURN_NAMES = ("point",)
     FUNCTION = "process"
-    CATEGORY = "io"
+
     DESCRIPTION = "Output a fractional (x, y) coordinate pair in [0, 1]."
 
     def process(self, x: float, y: float) -> tuple:
@@ -464,7 +464,7 @@ class CoordinatePair:
     RETURN_TYPES = ("COORDPAIR",)
     RETURN_NAMES = ("coord pair",)
     FUNCTION = "process"
-    CATEGORY = "io"
+
     DESCRIPTION = "Output a pair of coordinates."
 
     def process(self, a: tuple, b: tuple) -> tuple:
@@ -490,7 +490,7 @@ class Number:
     RETURN_TYPES = ("FLOAT",)
     RETURN_NAMES = ("value",)
     FUNCTION = "process"
-    CATEGORY = "io"
+
     DESCRIPTION = (
         "Output a fixed numeric value. "
         "When connected to FLOAT inputs the exact value is used; "
@@ -528,7 +528,7 @@ class RangeSlider:
     RETURN_TYPES = ("FLOAT",)
     RETURN_NAMES = ("value",)
     FUNCTION = "process"
-    CATEGORY = "io"
+
     DESCRIPTION = (
         "Interactive float slider. Set min and max bounds, then drag the slider to output a FLOAT value."
     )
@@ -584,7 +584,7 @@ class SaveImage:
 
     RETURN_TYPES = ()
     FUNCTION = "save"
-    CATEGORY = "io"
+
     OUTPUT_NODE = True
     MANUAL_TRIGGER = True
     DESCRIPTION = (

backend/nodes/level.py

@@ -33,7 +33,7 @@ class PlaneLevelField:
     RETURN_TYPES = ("DATA_FIELD",)
     RETURN_NAMES = ("leveled",)
     FUNCTION = "process"
-    CATEGORY = "level"
+
     DESCRIPTION = (
         "Fit and subtract a least-squares plane from the data. "
         "Equivalent to gwy_data_field_fit_plane + gwy_data_field_plane_level."
@@ -83,7 +83,7 @@ class PolyLevelField:
     RETURN_TYPES = ("DATA_FIELD", "DATA_FIELD")
     RETURN_NAMES = ("leveled", "background")
     FUNCTION = "process"
-    CATEGORY = "level"
+
     DESCRIPTION = (
         "Fit and subtract a polynomial background of given degree in x and y. "
         "Equivalent to gwy_data_field_fit_polynom."
@@ -131,7 +131,7 @@ class FixZero:
     RETURN_TYPES = ("DATA_FIELD",)
     RETURN_NAMES = ("zeroed",)
     FUNCTION = "process"
-    CATEGORY = "level"
+
     DESCRIPTION = (
         "Shift data so that the minimum (or mean/median) is zero. "
         "Equivalent to fix_zero in Gwyddion's level.c."

backend/nodes/mask.py

@@ -173,7 +173,7 @@ class DrawMask:
     RETURN_TYPES = ("IMAGE",)
     RETURN_NAMES = ("mask",)
     FUNCTION = "process"
-    CATEGORY = "mask"
+
     DESCRIPTION = (
         "Paint a binary mask directly over an image preview. "
         "Pen size controls newly drawn strokes, the overlay lets you clear the mask, "
@@ -227,7 +227,7 @@ class ThresholdMask:
     RETURN_TYPES = ("IMAGE",)
     RETURN_NAMES = ("mask",)
     FUNCTION = "process"
-    CATEGORY = "mask"
+
     DESCRIPTION = (
         "Create a binary mask by thresholding data. "
         "Otsu automatically finds the optimal threshold. "
@@ -295,7 +295,7 @@ class MaskMorphology:
     RETURN_TYPES = ("IMAGE",)
     RETURN_NAMES = ("mask",)
     FUNCTION = "process"
-    CATEGORY = "mask"
+
     DESCRIPTION = (
         "Apply morphological operations to a binary mask. "
         "Dilate expands regions, erode shrinks them, "
@@ -358,7 +358,7 @@ class MaskInvert:
     RETURN_TYPES = ("IMAGE",)
     RETURN_NAMES = ("mask",)
     FUNCTION = "process"
-    CATEGORY = "mask"
+
     DESCRIPTION = "Invert a binary mask — swap masked and unmasked regions."
 
     _broadcast_fn = None
@@ -400,7 +400,7 @@ class MaskCombine:
     RETURN_TYPES = ("IMAGE",)
     RETURN_NAMES = ("mask",)
     FUNCTION = "process"
-    CATEGORY = "mask"
+
     DESCRIPTION = (
         "Combine two binary masks with a boolean operation. "
         "AND keeps overlap, OR merges, XOR keeps non-overlapping regions, "

backend/nodes/modify.py

@@ -30,7 +30,7 @@ class ColormapAdjust:
     RETURN_TYPES = ("DATA_FIELD",)
     RETURN_NAMES = ("field",)
     FUNCTION = "process"
-    CATEGORY = "modify"
+
     DESCRIPTION = (
         "Adjust how a DATA_FIELD maps into its colormap without changing the underlying data. "
         "offset and scale operate in normalized display coordinates; Auto resets to the full data range."
@@ -71,7 +71,7 @@ class CropResizeField:
     RETURN_TYPES = ("DATA_FIELD",)
     RETURN_NAMES = ("field",)
     FUNCTION = "process"
-    CATEGORY = "modify"
+
     DESCRIPTION = (
         "Crop a DATA_FIELD with a draggable rectangle defined by two corners, then optionally resize it. "
         "Incoming COORD inputs can lock either corner. Cropping updates physical extents and offsets; "
@@ -212,7 +212,7 @@ class RotateField:
     RETURN_TYPES = ("DATA_FIELD",)
     RETURN_NAMES = ("field",)
     FUNCTION = "process"
-    CATEGORY = "modify"
+
     DESCRIPTION = (
         "Rotate a DATA_FIELD counterclockwise by an angle in degrees. "
         "Optionally expand the canvas to keep the full rotated field while preserving the field center."

backend/nodes/particle.py

@@ -30,7 +30,7 @@ class ParticleAnalysis:
     RETURN_TYPES = ("RECORD_TABLE",)
     RETURN_NAMES = ("particle_stats",)
     FUNCTION = "process"
-    CATEGORY = "particles"
+
     DESCRIPTION = (
         "Label connected particle regions in a binary mask and compute per-particle "
         "statistics: area, equivalent diameter, mean/max height, bounding box. "