Python - ProgressBar in GTK+ 3

Python - ProgressBar in GTK+ 3

Creating a progress bar in a GTK+ 3 application using Python is a straightforward task. GTK+ (GIMP Toolkit) is a cross-platform widget toolkit for creating graphical user interfaces, and it's used in the GNOME desktop environment. The Python bindings for GTK+ 3 are provided by PyGObject.

Here's a step-by-step guide to create a simple window with a progress bar and a button to update the progress:

  1. Install PyGObject: First, ensure PyGObject is installed. You can install it via pip:

    pip install PyGObject

  2. Import GTK: Import the necessary modules in your Python script.

    import gi
gi.require_version("Gtk", "3.0")
from gi.repository import Gtk

  3. Create a Window with a ProgressBar and a Button:

    • Create a GTK window.
    • Add a ProgressBar and a Button to the window.
    • Connect the button to a function that updates the progress bar.
    class ProgressBarWindow(Gtk.Window):
    def __init__(self):
        super().__init__(title="ProgressBar Demo")
        self.set_border_width(10)

        vbox = Gtk.Box(orientation=Gtk.Orientation.VERTICAL, spacing=6)
        self.add(vbox)

        # Create a ProgressBar
        self.progressbar = Gtk.ProgressBar()
        vbox.pack_start(self.progressbar, True, True, 0)

        # Create a Button that will update the progress bar
        button = Gtk.Button.new_with_label("Start Progress")
        button.connect("clicked", self.on_button_clicked)
        vbox.pack_start(button, True, True, 0)

    def on_button_clicked(self, widget):
        # Update the value of the progress bar
        new_value = self.progressbar.get_fraction() + 0.1
        if new_value > 1:
            new_value = 0
        self.progressbar.set_fraction(new_value)

def main():
    win = ProgressBarWindow()
    win.connect("destroy", Gtk.main_quit)
    win.show_all()
    Gtk.main()

if __name__ == "__main__":
    main()

  4. Run the Script: When you run this script, it will display a window with a progress bar and a button. Each time you click the button, the progress bar will advance.

This example demonstrates the basics of using a progress bar in a GTK+ 3 application with Python. You can customize the behavior and appearance of the progress bar according to your needs. For instance, you could update the progress bar based on the completion of certain tasks in your application, rather than on button clicks.

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