Kivy is an open-source Python framework for developing multitouch applications. It provides a rich set of UI components, one of which is the Popup widget. The Popup widget is used to display a temporary window on top of the main application window.

In this blog post, we will explore the different features and functionalities of the Popup widget in Kivy.

Creating a Basic Popup

To create a basic popup in Kivy, you need to instantiate the Popup class and set its title and content properties. Here’s an example:

from kivy.uix.popup import Popup
from kivy.uix.label import Label
from kivy.app import App

class MyPopup(Popup):
    pass

class MyApp(App):
    def build(self):
        content = Label(text='Hello, Kivy Popup!')
        popup = MyPopup(title='My Popup', content=content)
        return popup

if __name__ == '__main__':
    MyApp().run()

In the above example, we create a custom Popup class called MyPopup. We set the title property of the popup to “My Popup” and the content property to a Label widget with the text “Hello, Kivy Popup!”.

Finally, in the build method of the main application, we create an instance of MyPopup and return it. Then, we run the application using MyApp().run().

Displaying the Popup

To display the Popup, we can call its open() method. We can trigger the open() method in response to a button click or any other event. Here’s an example:

from kivy.uix.popup import Popup
from kivy.uix.label import Label
from kivy.uix.button import Button
from kivy.app import App

class MyPopup(Popup):
    pass

class MyApp(App):
    def build(self):
        content = Label(text='Hello, Kivy Popup!')
        popup = MyPopup(title='My Popup', content=content)

        button = Button(text='Open Popup')
        button.bind(on_release=popup.open)

        return button

if __name__ == '__main__':
    MyApp().run()

In the above example, we create a button widget with the text “Open Popup”. We bind the open() method of the popup to the on_release event of the button. When the button is clicked, the Popup will be displayed on top of the main application window.

Customizing the Popup

The Popup widget in Kivy provides various properties to customize its appearance and behavior. Here are some of the commonly used properties:

• title: A string that specifies the title of the popup window.
• content: A widget that specifies the contents of the popup.
• size_hint: A tuple that specifies the relative size of the popup.
• auto_dismiss: A Boolean that determines whether the popup can be dismissed by clicking outside its window.
• background: A string that specifies the path to an image file to use as the background of the popup.

You can modify these properties to customize the Popup widget according to your needs.

Conclusion

The Popup widget in Kivy allows you to display temporary windows on top of your main application window. In this blog post, we explored how to create and display a basic Popup in Kivy. We also learned how to customize the Popup widget using its properties.

Give the Popup widget a try in your next Kivy project and enhance the user experience by displaying temporary windows with important information or additional options.

Happy coding with Kivy!