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On change in a diagram. This avoid the iteration every time a render is required. The order algorithm should only use either the `parent` or `children` property. If both are used inconsistencies could possibly exist in the hierarchy and elements may be missing. |
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Gaphor
Gaphor is a UML and SysML modeling application written in Python. It is designed to be easy to use, while still being powerful. Gaphor implements a fully-compliant UML 2 data model, so it is much more than a picture drawing tool. You can use Gaphor to quickly visualize different aspects of a system as well as create complete, highly complex models.
📑 Table of Contents
📜 Background
Gaphor is a UML and SysML modeling application written in Python. We designed it to be easy to use, while still being powerful. Gaphor implements a fully-compliant UML 2 data model, so it is much more than a picture drawing tool. You can use Gaphor to quickly visualize different aspects of a system as well as create complete, highly complex models.
Gaphor is designed around the following principles:
- Simplicity: The application should be easy to use. Only some basic knowledge of UML or SysML is required.
- Consistency: UML is a graphical modeling language, so all modeling is done in a diagram.
- Workability: The application should not bother the user every time they do something non-UML-ish.
Gaphor is a GUI application that is built on GTK and Cairo. PyGObject and PyCairo provide Python bindings for those libraries. Gaphas provides the foundational diagramming functionality.
💾 Install
You can find the latest version on the gaphor.org website. Gaphor ships installers for macOS and Windows. Those can be found there. The Python package is also available on PyPI.
All releases are available on GitHub.
If you want to start developing on Gaphor, have a look at the Installation section of our Tech docs.
🔦 Usage
Creating models
Once Gaphor is started a new empty model is automatically created. The main diagram is already open in the Diagram section.
Select an element you want to place, for example a Class, by clicking on the icon in the Toolbox and click on the diagram. This will place a new Class item instance on the diagram and add a new Class to the model (it shows up in the Navigation). The selected tool will reset itself to the Pointer tool if the option ''Diagram -> Reset tool'' is selected.
Some elements are not directly visible. The section in the toolbox is collapsed and needs to be clicked first to reveal its contents.
Gaphor only has one diagram type, and it does not enforce which elements should be placed on a diagram.
Create a New Diagram
- Use the Navigation to select an element that can contain a diagram (a Package or Profile)
- Select Diagram, and New diagram. A new diagram is created.
Copy and Paste
Items in a diagram can be copied and pasted in the same diagram or other diagrams. Pasting places an existing item in the diagram, but the item itself is not duplicated. In other words, if you paste a Class object in a diagram, the Class will be added to the diagram, but there will be no new Class in the Navigation.
Drag and Drop
Adding an existing element to a diagram is done by dragging the element from the Navigation section onto a diagram. Diagrams and attribute/operations of a Class show up in the Navigation but can not be added to a diagram.
Elements can also be dragged within the Navigation in order to rearrange them in to different packages.
♥ Contributing
Thanks goes to these wonderful people (emoji key):
This project follows the all-contributors specification. Contributions of any kind are welcome!
- Check for open issues or open a fresh issue to start a discussion around a feature idea or a bug. There is a first-timers-only tag for issues that should be ideal for people who are not very familiar with the codebase yet.
- Fork the repository on GitHub to start making your changes to the master branch (or branch off of it).
- Write a test which shows that the bug was fixed or that the feature works as expected.
- Send a pull request and bug the maintainers until it gets merged and published. 😄
Translations
Translation of Gaphor is mostly done using Weblate.
For the Linux Flatpak, the desktop entry comment string can be translated at our Flatpak repository.
Thank you so much for your effort in helping us keep it available in many languages!
© License
Copyright © Arjan Molenaar and Dan Yeaw
Licensed under the Apache License v2.
Summary: You can do what you like with Gaphor, as long as you include the required notices. This permissive license contains a patent license from the contributors of the code.