Checkbox Widget in Kivy

Implementation

Here's a basic demonstration of using checkboxes in a Kivy application. After writing the code in an editor, save the file using the .py extension.

Filename: check.py

Code 1 (Python)

from kivy.app import App
# Required for creating widgets
from kivy.uix.widget import Widget
from kivy.lang import Builder

# Designate Our .kv design file 
Builder.load_file('check.kv')

class MyLayout(Widget):
checks = []
	def checkbox_click(self, instance, value, languages):
		if value == True:
			MyLayout.checks.append(languages)
			lang = ''
			for x in MyLayout.checks:
			tops = f'{lang} {x}'
			self.ids.output_label.text = f'You Selected: {lang}'
		else:
			MyLayout.checks.remove(languages)
			lang = ''
			for x in MyLayout.checks:
			tops = f'{lang} {x}'
			self.ids.output_label.text = f'You Selected: {lang}'

class Code_StudioApp(App):
def build(self):
return MyLayout()

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

You can also try this code with Online Python Compiler

Run Code

Writing everything in the same code leads to a jumbled mess that is difficult to understand by others. Hence we are using another file check.kv, which enables us to build our widget tree in a declarative manner and helps to call back widget properties properly.

Filename: check.kv

Code 2 (Kivy)

<MyLayout>
BoxLayout:
orientation: "vertical"
size: root.width, root.height

	Label:
	text: "Select Your Favourite Programming Languages!!"
	font_size:32

GridLayout:
cols:2

	Label:
	text: "Python"
	font_size:20
	
CheckBox:
on_active: root.checkbox_click(self, self.active, "Python")

	Label:
	text: "Java"
	font_size:20
	
CheckBox:
on_active: root.checkbox_click(self, self.active, "Java")

	Label:
	text: "CSharp"
	font_size:20
		
CheckBox:
      on_active: root.checkbox_click(self, self.active, "CSharp") 

	Label:
	id: output_label
	text: ""
	font_size:32

You can also try this code with Online Python Compiler

Run Code

We have used the Builder Method in our check.py file to bind both files.

Syntax:

from kivy.lang import Builder
Builder.load_file('file_name')

You can also try this code with Online Python Compiler

Run Code

Steps to Run the Code

To run our program, consider the following steps:

Step 1: Open the Anaconda Prompt and enter the correct path to our kivy programme.

Step 2: Use the following command and press Enter to run the programme.

Python file_name.py (Example: check.py)

Output

Here is the output of our simple checkbox application that allows us to select programming languages from a list of checkboxes. Code_Studio is the name of our application.

Frequently Asked Questions

What is the purpose of Kivy?

Kivy is a fascinating GUI framework that can be used to construct desktop user interfaces and mobile apps for iOS and Android. Kivy applications on any platform will not look like native apps.

Why isn't kivy popular?

It's because all Android programmers prefer to work using Java. The majority of mobile software is created with an android studio or kotlin, both of which are java-based.

Is kivy quick?

Kivy is extremely quick and efficient for various tasks; for example, you can effortlessly push and manipulate millions of vertices with complicated effects with no noticeable lag.

Which is the most effective, Django or Kivy?

Both are beneficial to learn. Django is for creating web programs (and web APIs). Kivy is a Python framework for creating mobile apps. Both are commonly used for different purposes, but you might combine them (A kivy app with Django as a backend).

What exactly is a Kivy designer?

Kivy Designer is a tool used by Kivy to create graphical user interfaces (GUIs) using Kivy Widgets. Widgets can be made, customised, and tested. Kivy is used to writing it entirely in Python.

Conclusion 

This article extensively discussed the Checkbox Widget in Kivy, its Implementation, and the steps to run the code using the Anaconda command prompt. Check out the article on the 19 best Python frameworks to know more about different Python frameworks.

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