Convert z3c.form field desc. to tooltip

# file eventlist.py in browser directory
...
from z3c.form import form
...

class ListEventsForm(form.Form):
    ...

    def updateWidgets(self):
        """Move fields' descriptions to title attributes of HTML form elements."""
        super(ListEventsForm, self).updateWidgets()
        for name, widget in self.widgets.items():
            widget.title = widget.field.description

In the ListEventsForm class we override the updateWidgets method in order to iterate through all form fields and set their title attribute. Note that this makes tooltips to show, but field descriptions themselves are still visible. We hide them with the following CSS rule (eventlist-form being our form’s ID):

#eventlist-form div.formHelp {
    display: none;
}

And that’s all, folks!