Possibility of combining your FileUpload widget with the ProgressBar?

[jpfeuffer]

Hi,

I wondered if it is possible to combine your nice FileUpload widget with the equally helpful ProgressBar widget somehow.

[redhog]

Heyas!

Cool to hear you find these tools useful!

You could probably subclass FileUpload and override this method https://github.com/emerald-geomodelling/BokehGarden/blob/master/bokeh_garden/upload.py#L121 with one that also calls ProgressBar.set();

Not sure if you'd have to wrap it in something like self.app.doc.add_next_tick_callback(tornado.gen.coroutine(self.method_to_update_progressbar)). I don't think so, but there's a risk. But if you do, Bokeh will let you know that you don't get to update from another thread.

You might also want to be careful with how often you update the progress bar. If on every uploaded chunk, this might add a lot of network overhead. Maybe each 10 or so?

[redhog]

If you get this to work and you make a combined widget, I'd be happy to include it in this library; shoot me a PR :)

[redhog]

Btw: Don't forget that you can also use something like self.app.doc.select({"tags": ["My progress bar"]}) to find the progress bar instance from the upload class, if you don't want to bake them into one GUI element but want them in different places in the UI.

[jpfeuffer]

Thank you so much for the detailed comments. It indeed looks feasible to do. I will definitely report back once I have something running!