Module property_row 

Reflection-driven property row vocabulary.

This module owns the shared schema types that describe how a single editable property should render in a property panel — what widget to mount, its numeric range / step / decimal-precision, its label, its description, and whether it belongs to an “advanced” section.

Living here (in agg-gui, not in any host crate) is deliberate. The schema is widget vocabulary — what the panel renderer can do — not a host-side concept tied to a particular value system. Host crates (atomartist, MatterCAD-rust) feed their reflected property structs into this vocabulary and the row factory mounts the right widget without per-host code.

Modeled after MatterCAD’s PropertyEditor + per-type IPropertyEditorFactory pair. The host walks a #[derive(Reflect)] struct, looks up each field’s EditorKind, and emits one row per field. The “is this row advanced?” decision is data-driven via NodeFieldAttrs::advanced rather than per-node show/hide code.

Phased migration

Phase 1 (this commit): vocabulary types only. atomartist-lib re-exports these from atomartist_lib::registry so downstream callers keep building without churn.

Phase 2 (next): factory function build_row(spec, value, callback) mounting the actual widget per EditorKind variant.

Phase 3 (then): full PropertyPanel widget that takes a list of field specs + a value getter/setter and renders the entire panel, including section headers, advanced gating, and tooltips.

Structs

NodeFieldAttrs

Field-level metadata — declared once per reflected struct field and consumed both by the host’s PropDef-style binding type (which folds these into the property store) and by the property panel when it renders the field’s editor + label.

NumberAttrs

Numeric editor attributes — used by EditorKind::NumberDrag and EditorKind::Slider. Mirrors NodeDesigner’s addWidget("slider", ...) option bag and MatterCAD’s [Slider] / [MaxDecimalPlaces] attributes.

Enums

EditorKind

Editor hint for a property — how the property panel should render an editor for the current value.

RowValue

Borrowed current value for a property row.

VisibleWhen

Conditional visibility for a field — the data-driven analogue of MatterCAD’s IPropertyGridModifier.UpdateControls(change) hook.

Functions

paint_editor_only

Paint only the editor portion of a row. The host paints the label elsewhere (typically a sibling label widget on the input socket’s row). Same per-kind renderers as paint_row — single code path, just no label.

paint_row

Paint a complete row — label on the left, editor on the right. Used for unbound property rows where the renderer owns the whole row.