Implementation in Python
In the below example, we have implemented a program to demonstrate the progress bar widget to show the progress of some tasks in an application.
#program for progress bar in kivy
from kivy.app import App
from kivy.uix.button import Button
from kivy.uix.boxlayout import BoxLayout
from kivy.clock import Clock
from kivy.uix.widget import Widget
from time import sleep
from kivy.uix.progressbar import ProgressBar
#class for progress bar
class MyApp(App):
def build(self):
self.progress = ProgressBar(max=100)
self.progress.value = 0
#button for start and stop
self.button = Button(text='Start', size_hint=(.2, .1))
self.button.bind(on_press=self.start)
self.layout = BoxLayout(orientation='vertical')
self.layout.add_widget(self.progress)
self.layout.add_widget(self.button)
return self.layout
#function for start and stop
def start(self, instance):
self.button.disabled = True
self.button.text = 'In Progress!'
self.button.bind(on_press=self.stop)
self.progress.value = 0
Clock.schedule_interval(self.update, 0.1)
#function for update
def update(self, dt):
self.progress.value += 1
if self.progress.value == 100:
self.button.disabled = False
self.button.text = 'Start'
self.button.bind(on_press=self.start)
Clock.unschedule(self.update)
if __name__ == '__main__':
MyApp().run()
You can also try this code with Online Python Compiler
Explanation
In this approach, we have imported the Kivy library. Then we imported the kivyApp and progress bar packages and the BoxLayout module to display the progress bar according to the requirements. Then we created the App class and called it from the main function. Additionally, we have defined the start and update functions for the functionality of the progress bar.
Output 1(Before Start Button is Pressed)
We can notice the default value of the progress bar is set to "0." Thus, we can see no progress until we press the start button.
Output 2(After Start Button is Pressed)
Here, the progress bar has reached almost 35% of the total width, and the button is inactive. The button now displays the text “In Progress!” as defined in the start method.
Frequently Asked Questions
What can Kivy do?
Kivy is a Python package that allows you to construct mobile and desktop applications using Python. It takes your code and turns it into apps based on your logic. Then it delivers an almost complete Python installation with each app.
Is it simple to use Kivy?
The widgets that come pre-installed with the Kivy platform are simple and support multi-touch. The Kivy framework outperforms other HTML5 options because the GUI is simple and aids in the speedy development of applications.
Is it worthwhile to learn Kivy?
It is worthwhile to learn. It can help you create apps faster; if you're making mobile apps, all you need is one code to target all platforms (android and iOS), and it's easier to use than Android Studio (I'm not sure about iOS and Xcode).
Is Kivy native?
When you use Kivy to make an application, you're making a Natural User Interface, or NUI. The goal of a natural user interface is for the user to learn how to use your product with little to no guidance. Kivy does not attempt to leverage native widgets or controls. Its widgets are all hand-drawn.
Conclusion
In this article, we have discussed the Kivy Progress Bar widget and its parameters. We learned about the Progress Bar widget's uses, syntax, and implementation in Python.
We hope that this blog has helped you enhance your knowledge on how to adjust window size in Kivy using Python, and if you would like to learn more, check out our articles on the "Button action in kivy," "Scroll View Widget in Kivy," "Button colour in kivy," "Dropdown list in Kivy," and "Kivy float layout.’ Do upvote our blog to help other ninjas grow.
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