Monday, August 4, 2014

56. Carousel


The Carousel can be used to create a slide show. Here, we will have a 1-second delay between each slide.




Since this is an application, we need the App class. The Carousel widget is the super class of the root. We use the Clock to create a 1-second timer.




The root is based on Carousel. The update() function runs the Carousel's load_next() function to load the next slide.




In the build() of the app, a title is set and a continuous 1-second timer is started.


# ex56.py
from kivy.app import App
from kivy.uix.carousel import Carousel
from kivy.clock import Clock

class Ex56(Carousel):
    def update(self, dt):
        self.load_next()

class Ex56App(App):
    def build(self):
        self.title = 'Carousel Example'
        ex56 = Ex56()
        Clock.schedule_interval(ex56.update, 1)
        return ex56

if __name__ == '__main__':
    Ex56App().run()



In the kv file, a dynamic class MyImage is created so the images are stretched.




For the root, the direction of Carousel is 'right' and looping is True. Here, we have the first 2 images.




The next 3 slides are of images p3, p4 and p5.


# ex56.kv
<MyImage@Image>:
    keep_ratio: False
    allow_stretch: True
    
<Ex56>:
    direction: 'right'
    loop: True
    MyImage:
        source: 'p1.png'
    MyImage:
        source: 'p2.png'
    MyImage:
        source: 'p3.png'
    MyImage:
        source: 'p4.png'
    MyImage:
        source: 'p5.png'


Demo of App on Youtube.

9 comments:

  1. Python:

    Good Post! Thank you so much for sharing this pretty post, it was so good to read and useful to improve my knowledge as updated one, keep blogging.

    https://www.emexotechnologies.com/online-courses/python-training-in-electronic-city/

    ReplyDelete
  2. Good Post! Thank you so much for sharing this pretty post, it was so good to read and useful to improve my knowledge as updated one, keep blogging.

    Python Training in electronic city

    ReplyDelete
  3. Hmm is anyone else experiencing problems with the images on this blog loading? I'm trying to find out if its a problem on my end or if it's the blog. Any feedback would be greatly appreciated. apple hilfe berlin

    ReplyDelete
  4. For the programming you must need the best support from your PC. But if you are suffering any kinds of issue with your laptop or pc then ITFUX24 can help you. They has the 7+ years of experience in repairing service. Take their computer reparatur service today and get discount form the first day!

    ReplyDelete