Trigger javascript alert popup message from python?

Notebook
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1

Hi all,
I’m looking for a way to send a popup message from a pre- or post-save hook (python) back to the UI.

I’ve seen a few third-party ‘messagebox’ solutions but wanted to do things "the right way"™ using custom.js, but the examples I’ve seen are all bound to a toolbar widget or something in the UI – is it possible to call a “dialog.modal” javascript from python code? Any tips, examples, links, etc. appreciated.

TIA,
John

2

I’m not sure if it’s the right or best way, but for anyone else with this issue I’ve found that you can raise HTTPError messages from python; 100s don’t display; 200s result in a messagebox, 300-500s result in a message to the toolbar area.

I then trap the error text in \notebook\static\notebook\js\notebook.js:

    if (data.message) {
        // JD: add custom handling for autosave storage space checking (note: 'data' does not pass the HTTP code, just the message text)
        if(data.message.startsWith("Warning: you are running low on storage space;")){
            var title = i18n.msg._("Storage Capacity Warning");
            body.append($("<p>").text(data.message));
                dialog.modal({
                    notebook: this,
                    keyboard_manager: this.keyboard_manager,
                    title: title,
                    body: body,
                    buttons : {
                        OK : {
                            "class" : "btn-primary"
                        }
                    }
                });
            this.events.trigger('notebook_saved.Notebook');
            this._update_autosave_interval(start);
            if (this._checkpoint_after_save) {
                this.create_checkpoint();
                this._checkpoint_after_save = false;
            }
        }