Python – ProgressBar in GTK+ 3
ProgressBar is used to display the progress of long-running operations. The Gtk.ProgressBar can be used in two different modes –
- Percentage mode
- Activity mode.
When an application can determine how much work is remaining we can use Gtk.ProgressBar in percentage mode. In this mode, the application is required to call Gtk.ProgressBar.set_fraction() periodically to update the progress bar, passing a float between 0 and 1 to provide the new percentage value.
When an application cannot determine the amount of work to do, it can use activity mode, which shows activity by a block moving back and forth within the progress area. In this mode, the application is required to call Gtk.ProgressBar.pulse() periodically to update the progress bar. We can choose the step size, with the Gtk.ProgressBar.set_pulse_step() method. By default, Gtk.ProgressBar is horizontal and left-to-right, but you can change it to a vertical progress bar by using the Gtk.ProgressBar.set_orientation() method. Changing the direction the progress bar grows can be done using Gtk.ProgressBar.set_inverted(). Gtk.ProgressBar can also contain text which can be set by calling Gtk.ProgressBar.set_text() and Gtk.ProgressBar.set_show_text().
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