# Mermaid flowchart widget

This module adds a basic widget for rendering text fields as flowcharts using mermaid.

Table of contents

- Usage
- Demonstration
- Upgrading Mermaid
- Bug Tracker
- Credits
  - Authors
  - Contributors
  - Maintainers

# Usage

Put a `widget="mermaid"` attribute in relevant field tags in the view declaration:

    <field name="flowchart" widget="mermaid"/>

Optionally, use an `options` attribute to pass a JSON object with mermaid configuration:

    <field name="flowchart"
           widget="mermaid"
           options='{"theme": "forest", "gantt": {"fontSize": 14}}'/>

The syntax for creating diagrams is described in mermaid’s documentation.

As an example, this text:

    graph LR
        10.0 --> 11.0
        11.0 --> 12.0
        12.0 -.-> 13.0

Produces this flowchart:

# Demonstration

In demo mode, the addon adds a flowchart field to users so you can try it. This shows up in Runbot instances.

# Upgrading Mermaid

This information is only relevant for the development of this addon, not for users.

This addon uses a slightly tweaked build of Mermaid that works in older browsers. To reproduce it, take the following steps:

- Clone `https://github.com/knsv/mermaid/`

- Checkout the version you want to upgrade to (e.g. `git checkout 8.4.0`)

- In `webpack.config.base.js`, in `const jsRule = ...`, remove the `include` key (so all dependencies are transpiled)

- In `babel.config.js`, in `targets`, add some browsers besides `node: 'current'`. I arbitrarily went with this:

      targets: {
        node: 'current',
        ie: '11',
        edge: '20',
        firefox: '35',
        chrome: '45',
        safari: '9',
      }

- Run `yarn install`

- Run `yarn build`

- The completed file is now in `dist/mermaid.js`. Try running `grep 'let ' dist/mermaid.js` to make sure everything was transpiled. The only output should be from comments.

- Copy `dist/mermaid.js` to `web_widget_mermaid/static/lib/mermaid/mermaid.js`.

- Bump the version number in `__manifest__.py` to match the Mermaid version.

# Bug Tracker

Bugs are tracked on GitHub Issues. In case of trouble, please check there if your issue has already been reported. If you spotted it first, help us smashing it by providing a detailed and welcomed feedback.

Do not contact contributors directly about support or help with technical issues.

# Credits

## Authors

- Therp BV

## Contributors

- Jan Verbeek <jverbeek@therp.nl>

## Maintainers

This module is maintained by the OCA.

OCA, or the Odoo Community Association, is a nonprofit organization whose mission is to support the collaborative development of Odoo features and promote its widespread use.

This module is part of the OCA/web project on GitHub.

You are welcome to contribute. To learn how please visit https://odoo-community.org/page/Contribute.