Fixo Studio

Reference for the Studio activity tree — the entry point for browsing, editing, and authoring every Fixo resource.

Where it lives

FixoStudioActivity is reachable from the Hub utilities menu and the Agent configuration menu. It's a MenuActivity whose buttons push specific manager activities onto the activity stack. Studio runs Node-independently (it takes a FixoLibrary* and a couple of helpers, not an Agent*) so Hub and Remote can author presets too.

Manager activities

Every Book has a manager. They share a common base (FixoItemManagerActivity) and a uniform UI:

Manager	Edits	Editor activity
`FixoPresetManager`	Presets	`FixoPresetEditorActivity`
`FixoBoardTypeManager`	Boards	`BoardManagerActivity` (in libboard)
`FixoActuatorTypeManager`	Actuator types	`FixoActuatorTypeEditorActivity`
`FixoSensorTypeManager`	Sensor types	`FixoSensorTypeEditorActivity`
`FixoLobeTypeManager`	Lobe types	`FixoLobeTypeEditorActivity`
`FixoStanzaTemplateManager`	Stanza templates	(inline edit)
`FixoPresetTemplateManager`	Preset templates	(inline edit)

Common manager UI

Element	Behaviour
List view	Items in `FixoBook::list()` order. Built-ins greyed out and read-only.
New	Auto-numbered name suggestion (`"New preset 1"`, etc.). Calls `book->create()`.
Rename	Disabled for built-ins. Inline edit with collision check.
Duplicate	Creates `"Copy of X"`. Always enabled — duplicate-to-edit is the workflow for editing built-ins.
Delete	Disabled for built-ins. Confirmation dialog.
Import	File picker; calls `book->importFile()`.
Export	Writes the selected item via `book->exportFile()`.
From template	Visible only on `FixoPresetManager`. Pushes the preset-template wizard.
Done	Pops the manager off the stack.
Double-click on item	Opens the matching editor activity.

Built-in items

Items with builtin: true in their fixo.json are read-only. The manager:

Greys out the row in the list
Disables Rename and Delete
Allows Duplicate (the recommended way to customise a built-in)
Opens the editor in read-only mode (all fields disabled, Save greyed out, tooltip explains)

Type editors

FixoActuatorTypeEditorActivity, FixoSensorTypeEditorActivity, and FixoLobeTypeEditorActivity share a common base (FixoTypeEditorActivity) and look like this:

Common fields

Type id — unique identifier (e.g. my-custom-servo)
Title — human-readable
Description — one-line description
Main header — the .hpp filename the firmware generator includes (e.g. my-custom-servo.hpp)
C++ source — full-screen code editor with CppSyntaxHighlighter and WidgetCodeEditor (line numbers, error squigglies, auto-indent on Enter, Tab indent, Ctrl+Shift+Up/Down to move lines)
Save / Cancel buttons (Save is greyed for built-ins)

Per-type fields

Editor	Extra fields
Actuator type	`pinCount`, `pinPurposes`, wire `valueRep` (`totalBits`, `fractionalBits`, `isSigned`, `isFloat`)
Sensor type	`pinCount`, `pinPurposes`
Lobe type	`placement` (board-only / native-only / both), `inputParameters`

Debounced source change signal

The base class emits sourceDebouncedChanged(QString) 500 ms after the user stops typing in the C++ editor. A status line under the editor reads editing… → changes pending save. The future live-compile path hooks this signal to a background LLVM build that maps compiler diagnostics back to line annotations via WidgetCodeEditor::setLineMessage().

Live error feedback is currently scaffolded but inactive — a type in isolation has no preset context, so the background build needs a Phase 6 FixoRuntime instance (or a Phase 4 preset context) to produce meaningful diagnostics. Editing types still works fine; you just don't get inline compile errors yet.

Preset editor

FixoPresetEditorActivity opens when the user double-clicks a preset in FixoPresetManager (or via New / Duplicate / From template). Layout:

Section	What it edits
Name	Free-text id
Board	`QComboBox` populated from `FixoBoardTypeBook`. Mandatory.
Actuators	Table; one row per actuator with columns: type (combo), name, pin, trim, min, max, reverse. Add / Remove buttons.
Sensors	Table; columns: type, name, pin, pinB (for two-pin sensors). Add / Remove buttons.
Stanzas	List `id — lobeType (N mappings)`. Add / Edit / Remove. The full per-stanza pose-mapping editor arrives with `StanzaEditorActivity`.
Stanza sets	`QLabel` summarising derived stanza sets. Recomputed automatically when actuators or stanzas change.
Save / Cancel	Save persists via `FixoPresetBook::create()`; Cancel pops without writing.

Built-in presets load read-only with all inputs disabled and Save greyed out (tooltip points at Duplicate).

Stanza-set visualisation

The "Stanza sets" label lists each derived set, e.g.:

Set 1: walk, idle           (share leg actuators)
Set 2: drive                 (uses wheels only)

Two stanzas end up in the same set when they share any actuator. Only one stanza per set can run at a time — the Remote-side stanza picker enforces this with a conflict-disabling combo.

How the Studio composes

FixoStudioActivity (MenuActivity)
├── Presets
│   ├── FixoPresetManager        ─▶ FixoPresetEditorActivity
│   └── FixoPresetTemplateManager ─▶ inline edit / wizard
├── Hardware
│   ├── FixoBoardTypeManager     ─▶ BoardManagerActivity (libboard)
│   ├── FixoActuatorTypeManager  ─▶ FixoActuatorTypeEditorActivity
│   └── FixoSensorTypeManager    ─▶ FixoSensorTypeEditorActivity
├── Control
│   ├── FixoLobeTypeManager      ─▶ FixoLobeTypeEditorActivity
│   └── FixoStanzaTemplateManager ─▶ inline edit
└── Build
    └── (FixoRuntime view — see fixo-runtime reference)

Source code

Component	Header
`FixoStudioActivity`	`libfixo/fixo/studio/FixoStudioActivity.hpp`
`FixoItemManagerActivity`	`libfixo/fixo/studio/FixoItemManagerActivity.hpp`
`FixoPresetManager` etc.	`libfixo/fixo/studio/FixoManagers.hpp`
`FixoTypeEditorActivity`	`libfixo/fixo/type/FixoTypeEditorActivity.hpp`
`FixoActuatorTypeEditorActivity`	`libfixo/fixo/type/FixoActuatorTypeEditorActivity.hpp`
`FixoSensorTypeEditorActivity`	`libfixo/fixo/type/FixoSensorTypeEditorActivity.hpp`
`FixoLobeTypeEditorActivity`	`libfixo/fixo/type/FixoLobeTypeEditorActivity.hpp`
`FixoPresetEditorActivity`	`libfixo/fixo/studio/FixoPresetEditorActivity.hpp`
`FixoPresetTemplateWizardActivity`	`libfixo/fixo/studio/FixoPresetTemplateWizardActivity.hpp`