[guijacquemet]

Summary

Two problems found while running a StarDist 2D LabConstrictor app (284 nuclei on one image) in QuPath 0.7.0.

1. The tool form showed no parameter names, only the ⓘ markers.

• Cause: LcHelp.mark puts the ⓘ as the label's graphic. The grid's label column had no minimum width, and the control column grows. With a wide control (an image row: chooser, area, file field), JavaFX squeezed the column and kept the graphic but dropped the label text.
• Fix: in newGrid(), the label column keeps its labels' preferred width (c0.minWidth = Region.USE_PREF_SIZE).

2. Hundreds of outlines covered the image with their names.

• Cause: every outline annotation is named <app>:<output> <label>, and QuPath draws annotation names by default.
• Fix:
  • Every outline annotation gets the classification <app>:<output> (one per output), so they can be counted, coloured and selected together.
  • Above LcConst.MAX_NAMED_SHAPES = 50 outlines, annotations get no name. The label stays a measurement; when the GeoJSON has no label property, the outline's number becomes the label measurement.
  • At 50 outlines or fewer, names are unchanged. Replace() removes the previous outlines by name or by classification.
  • The status sentence says which applies.
  • This matches SPEC_WAVE1.md ("QuPath: annotations named <app>:<output>") at least as closely as before.

Docs: README (new "Outlines" bullet) and docs/user-guide.md.

Before	After
Form: only ⓘ in the label column	Form: "Image ⓘ", "Model ⓘ", "Model folder ⓘ", "Prob thresh ⓘ", …
284 names drawn over the nuclei	284 outlines coloured by their classification, no text

Tests

Run locally on QuPath 0.7.0 (release tarball, checksum verified), extension built with build.sh (JDK 25), xvfb, through tests/run_gui_ci.sh. All bodies pass:

Body	Checks
shapes	7, including the new one_classification_per_output
area	48
parity_lifecycle	28, including the 50 000-outline cap sentence
parity_messages	18
parity_form	55
widgets	7
adversarial	16
parity_results	26
conformance	119
interactions	9
region	7

Total: 340 checks.

• tests/ui_audit_oracle.groovy now also finds unnamed outlines by their classification. The UI audit itself was not run here.

• With the StarDist2D app (284 outlines), all of these pass:

  • no names;
  • 284 annotations of classification StarDist2D:stardist_outlines;
  • label/prob measurements;
  • a second run with Replace() leaves one set.

  The test body and screenshots are in CellMigrationLab/Stardist2D#2, under docs/screenshots/qupath/.

• Not run here: the listing matrix, playground, trust, retention, async and identity bodies. They don't touch forms or outlines.

---

Generated by Claude Code