Files
cadcraft/docs/control-protocol.md
T
Valentin KleinandClaude Opus 5.5 a349e4925f Command line, ViewCube and UCS icon take the pointer; history window (F2) (#181)
Clicks on the command line's history, the UCS icon and the ViewCube ring fell
through to the drawing (picking objects or starting a selection window, or
entering a point during a command), the chevron did nothing, and the wheel over
the overlays zoomed the drawing. The ViewCube's Top face was a click-only
widget, so the canvas still counted as hovered underneath it (crosshair, wheel).

- Every overlay now registers a widget that senses clicks and drags, so egui
  hands the pointer to the overlay instead of the canvas.
- Command line: a click on the history lines or the chevron (now pointing up)
  opens a scrollable history window with the whole log; F2 and TEXTSCR open it
  too (`ui.toggle.history`, Window > Command History). Dragging the history's
  top edge sets how many lines show (`ui.cmdline.lines`, 0-12).
- ViewCube (new viewcube.rs): Top face and a Home button run `zoom.extents`;
  hover highlights; right-click menu (Home, Hide ViewCube). The compass ring
  says that the 2D plan view can't rotate (no view twist yet) instead of
  doing nothing.
- UCS icon and the WCS pill open the coordinate-system menu (World, Hide UCS
  Icon).
- Control channel: `ui.drag` (real press, move, release) and
  `cmdline.state` -> `historyExpanded`.

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
2026-10-10 12:16:27 -04:00

36 lines
2.7 KiB
Markdown

# CADCraft control protocol
Start the desktop app with `--control PORT` (or `CADCRAFT_CONTROL_PORT=PORT`). It listens on
`127.0.0.1:PORT` for JSON lines: one request per line, one reply per line.
```json
{"id": 1, "method": "cmdline.input", "params": {"text": "circle 0,0 5"}}
{"id": 1, "ok": true, "result": {"prompt": "Command:", "output": ["Command: CIRCLE"], ...}}
```
Errors come back as `{"id": …, "ok": false, "error": "message"}`.
| Method | Params | What it does |
|---|---|---|
| `cmdline.input` | `{text}` | Type a line at the command line exactly like a user. Starts commands by name/alias and answers prompts (points `x,y`, `@dx,dy`, `@d<a`, distances, keywords, empty = Enter). Spaces act as Enter except at text prompts. |
| `cmdline.script` | `{text}` | Run a multi-line script (like `.scr` files). |
| `cmdline.key` | `{key: "enter"\|"escape"}` | Press Enter or Escape. |
| `cmdline.state` | | Current prompt, keywords, accepted input kinds, history tail. |
| `engine.execute` | `{command, params}` | Run any command with JSON parameters. Never opens a dialog. |
| `engine.commands` | | Every command: id, label, menu path, shortcut, aliases, params doc, enabled. |
| `drawing.inspect` | `{entities?, limit?}` | Drawing summary (counts, extents, layers, styles, blocks, layouts, selection, undo) and entities with handles and geometry. |
| `ui.inspect` | | UI state, canvas rect, view, cursor and snap, performance counters. |
| `ui.menu.list` / `ui.menu.invoke` | `{command}` | The menu tree; invoke an item like a click (interactive). |
| `ui.pointer` | `{x, y, space?: "world"\|"screen", button?, action?: "click"\|"move"}` | Click in the drawing area (world coordinates by default). Right button = Enter. |
| `ui.click` / `ui.move` | `{x, y, button?, shift?}` | Real egui pointer events in screen points (reach every widget). |
| `ui.drag` | `{x, y, to: [x, y], button?}` | Real press, move and release (drag the command line's top edge, the ViewCube ring…). |
| `ui.key` / `ui.text` | `{key, cmd?, shift?, alt?}` / `{text}` | Synthetic keyboard input. |
| `ui.set` | UiState fields | Show/hide palettes, toolbars, command line, ViewCube…; `theme: "system"\|"light"\|"dark"` (also `engine.execute` with `ui.theme {theme}`); `ui.inspect` reports the theme shown (`theme`: light/dark). |
| `ui.resize` | `{width, height}` | Resize the window. |
| `ui.screenshot` | `{path?}` | PNG of the window (needs a presented frame). |
| `ui.render` | `{path?, width?, height?}` | Headless render of the current view of the drawing. |
| `app.open` / `app.save` / `app.quit` | `{path}` | File operations. |
The MCP server (`cadcraft-cli mcp --connect 127.0.0.1:PORT`) wraps this protocol; headless
(`cadcraft-cli mcp`) it serves the same methods from an in-process session.