show_text
Description:
Sets whether the progress bar will show a text in addition to the bar itself.
The shown text is either the value of the [property@Gtk.ProgressBar:text] property or, if that is null, the [ property@Gtk.ProgressBar:fraction] value, as a percentage.
To make a progress bar that is styled and sized suitably for showing text (even if the actual text is blank), set [ property@Gtk.ProgressBar:show-text] to true and [property@Gtk.ProgressBar:text] to the empty string (not null).