This is a prototype OMERO.web app, exploring the use of https://github.com/crossfilter/crossfilter in a new implementation of https://github.com/ome/omero-parade.

It uses Create React App with the cross-filter, dc.js and React interaction based on the blog post at https://www.lighttag.io/blog/react-dc-js/.

Install into your omero-web python environment:

$ pip install parade-crossfilter

You will need to have the app configured in your OMERO.web install:

$ omero config append omero.web.apps '"parade_crossfilter"'

Add to 'open_with' config:

$ omero config append omero.web.open_with '["Parade", "parade_crossfilter_index", {"supported_objects": ["project", "screen"]}]'

This prototype aims to investigate the scope and technical solutions for a data-visualization app based on omero-parade.

Limitations of the current omero-parade app include:

• Data is tied to Images (in Dataset) or Wells (in Plate). Can't handle data linked to ROIS or to multiple Images in a Well.
• Loads the same data from the server for filtering again for display.
• Limited plots available (scatter plot only)

Particular questions:

• Is crossfilter.js a suitable tool for filtering/grouping data? (A: mostly good)
• What to use for Plots? (A: Plotly.js is looking pretty good)
• How do we handle hierarchy of multiple Images per Well, or ROIs per Image?
• How much data processing is possible, while still being usable / generic?
• Is Parade primarily for exploring or presenting data (like figure)?

To install in dev mode, you need to checkout this repository, then:

$ cd parade-crossfilter
$ pip install -e .

To build the JS bundle, you'll need to have Node installed. Then install the JavaScript dependencies and build:

$ npm install
$ npm run build

This builds the app for production to the build folder and copies the html and static files to the Django app in parade_crossfilter.
See OMERO config steps above.

You can run this project in development mode or as an OMERO.web Django app (below).

The notes below are largely from Create React App but have been updated with changes made to connect to OMERO in dev or production modes.

To get started:

$ cd parade-crossfilter
$ npm install

In the project directory, you can run:

$ npm start

Runs the app in the development mode.
Open http://localhost:3000 to view it in the browser.

The app will try to connect to an OMERO.web server at http://localhost:4080 using an existing session, which requires CORS to be enabled.
You will need to be logged-in to http://localhost:4080/webclient.
To use a different server, edit dev_omeroweb_index in public/index.html.

• Update version to release version in setup.py and package.json
• Update CHANGELOG
• Commit and tag

Run:

$ rm -rf dist
$ python setup.py sdist bdist_wheel

# TODO: get github actions to do this!
$ python -m twine upload dist/*