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Hex Color for Button Background – Kivy

  • Difficulty Level : Hard
  • Last Updated : 24 Feb, 2021

Kivy is a platform-independent GUI tool in Python. It can run on Android, IOS, Linux and Windows, etc. This is the only GUI library from python which can independently run on the android device even we can use it on Raspberry pi also.  It is an open-source Python library for the rapid development of multi-touch applications. Its graphic engine is built over OpenGL and it also supports a fast graphics pipeline.

This article focuses on creating a GUI window using kivy with a button and then add colors to it using hex color codes.

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Approach

  • Import kivy button
  • Import kivy app
  • Import kivy builder
  • Create App class
  • Create button
  • Create mechanism to change color on click of the button
  • Return builder string
  • Run an instance of the class

Program:

Python3




# importing button widget from kivy framework
from kivy.uix.button import Button
  
from kivy.app import App
  
# importing builder from kivy
from kivy.lang import Builder
  
  
# this is the main class which will 
# render the whole application
class uiApp(App):
  
    # method which will render our application
    def build(self):
  
        return Builder.load_string("""
          
#:import C kivy.utils.get_color_from_hex
Button:
  
   # text which will appear on first button
   text:"first button"
  
   background_color: C("#f9f871")
                                   """)
  
  
# running the application
uiApp().run()

Output:

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