Quote Originally Posted by Thierry76 View Post
PS I dream of your webviev2 with diagrams.net (drawio-desktop)....
Why not just load a js-based charting-lib into the WebView (instead of a plugin)?

There's a dozen or more quite good ones out there -
the one we've decided to use is dc.js (because it's open - and based on the svg+canvas-lib d3.js, which we had in use already):

Here's a quite impressive example (which supports zooming and range-shifting on an interdependent, complex dataset):
https://dc-js.github.io/dc.js/

And here a turorial for it (normally, you'll only need a dozen of js-config-lines, to visualize a certain chart-type).
https://www.tutorialspoint.com/dcjs/index.htm

If you're more interested in org- and flow-charts... simple ones can be created directly in code via d3.js -
but there's also libs out there which specialize in that kind of thing ...
(though I have not needed any org- and flowchart functionality so far, so cannot give any useful hints).

Olaf