diagrams-opus-qt/README.md
Ilya d0bd47935a docs: mark plan complete and add screenshot to README
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-07-02 23:27:09 +02:00

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# Pipeline Network Diagram Editor
A desktop editor for drawing **pipeline networks** — water lines, power lines, gas, etc. —
built with **PyQt6** on the Qt **QGraphicsView** framework.
## Features
- **Node library** with grouped, draggable vector (SVG) symbols (pump, tank, valve, source, sink, junction…).
- **Typed ports** with relation semantics (water / power / gas / …) and per-relation color schemes;
connection compatibility is validated and highlighted.
- **Orthogonal edge routing** along a rectangular grid, with an optional **arc at line crossings**.
- **Edge styles**: line styles plus head/tail decorations (arrow, circle, diamond, none).
- **Grouped property panel** for the selected node/edge — presentation (geometry, title, color) and
physics (length, diameter, flow rate, flow type). Property types: string, int, float, bool, enum,
color, catalogue item, catalogue items, value list.
- **Mock flow calculation** distributing flow across edges, with **animated direction and volume**.
- Editing UX: drag, multi-select, snap-to-grid, undo/redo, copy/paste, save/open (JSON),
export to PNG/SVG, configurable grid & color schemes.
![Pipeline editor sample network](docs/screenshot.png)
## Requirements
- Python 3.11+
- PyQt6 (with QtSvg)
On Debian/Ubuntu: `sudo apt install python3-pyqt6 python3-pyqt6.qtsvg`
or `pip install -r requirements.txt`.
## Run
```bash
python -m pipeline_editor
```
## Test
Tests run headless:
```bash
QT_QPA_PLATFORM=offscreen python -m pytest
```
## Layout
```
pipeline_editor/
model/ domain: properties, catalogue, relations, ports, nodes, edges, document
view/ QGraphicsView canvas, scene, node/port/edge items, routing
panels/ node library dock, property editor dock
calc/ mock flow solver + animation
resources/ SVG node symbols, color schemes
docs/plan/ actionable implementation plan
tests/ pytest suites for typical scenarios
```