Kivy image opacity. Already have an account? Sign in to comment. py at master · kivy/kivy Jul 11, 2025 · Kivy is a platform-independent GUI tool in Python. As it can be run on Android, IOS, Linux and Windows, etc. Instead of passing the filename, you’ll need to pass the data as a BytesIO object together with an “ext” parameter. ---This video is based on Open source UI framework written in Python, running on Windows, Linux, macOS, Android and iOS - kivy/examples/miscellaneous/opacitywindow. For example : kivy_image_widget. You can combine this class with other widgets, such as an Image, to provide alternative buttons that preserve Kivy button behavior. Then, the opacity is applied on the shader as: The ButtonBehavior mixin class provides Button behavior. . Jun 21, 2021 · In the case example of the sprite image, it would look like only the sprite is floating on the screen with no bordering window, box etc. The opacity attribute controls the opacity of the widget and its children. Setting the alpha part to the opacity level you want will give you image opacity. Image Widget: The Image widget is used to display an image. Learn how to adjust the opacity of a rectangle in Kivy, allowing you to see other colors underneath it for a layered visual effect. Let's see how to add a simple drawing to a Kivy window. 5 * 0. Dec 1, 2014 · 1 I whant to use an image with transparent background. The r, g, b, a, mentioned in the above link means red, green, blue, alpha. source = None I would like to clear the contents of an image Mar 21, 2021 · Kivy Transparent Canvas/Background Asked 4 years, 11 months ago Modified 4 years, 11 months ago Viewed 748 times However, by default the text image (texture) is only just large enough to contain the characters and is positioned in the center of the Label. Dec 13, 2024 · You could take your image into an image editor and set the transparent areas to a solid color (black for example), and use that to set the transparent area as I did in my example, or try one of the other shape modes. But I found no way to set a transparent background color and set antialising. uix. I can't seem to figure out how to remove the source to make it blank. Jul 12, 2016 · I'm quite new to kivy. 2 = 0. from random import randint from random import random from kivy. Tkinter has attributes('-alpha',07) but this is applied to all assets. 👉🏽 Kivy Tutorial - Learn Kivy with Examples. png' if Apr 16, 2012 · My kivy version is 1. 0 for Mac. I'm working on an app for Android, on it it I need to display a png image with some transparency but on my Android mobile a black rectangle is displayed in the position where the image is supposed to be. how does one change the opacity of the randomly thrown image when the buttons are clicked? (using kivy). You can also load the image data directly from a memory block. kivy has a background_color which affects opacity but 0 doesn't make it transparent only grey. The valign property will have no effect and halign will only have an effect if your text has newlines; a single line of text will appear to be centered even though halign is set to left (by default). 1. 5 and a child has an opacity of 0. For Example: This example shows a simple rectangle drawn on the window using the widget’s canvas. 2. The common kivy "Image" class offers the loading of a file into an image. app import App from kivy. Sign up for free to join this conversation on GitHub. May 18, 2015 · How do I change the transparency of the images to 50%? class MyBackground (Widget): def __init__ (self, **kwargs): x = randint (1,10) print (x) y = 'water. If you want to display large images or retrieve them from URL’s, using AsyncImage will allow these resources to be retrieved on a background thread without blocking your application. Be careful, it’s a cumulative attribute: the value is multiplied by the current global opacity and the result is applied to the current context color. Jul 6, 2018 · Regarding a Kivy Image widget. Each widget has its own canvas by default and you can add instructions like Rectangle, Color, or Line to display custom graphics. It is basically used to develop the Android application, but it does not mean that it can not be used on Desktop applications. Example ¶ The following example adds button behavior to an image to make a checkbox that behaves like a button: Nov 4, 2025 · A Canvas in Kivy is a container used for drawing shapes, colors, and images on a widget. For example: if your parent has an opacity of 0. For an overview of behaviors, please refer to the behaviors documentation. If you want to display large images or retrieve them from URL’s, using AsyncImage will allow these resources to be retrieved on a background thread without blocking your application. 2, the real opacity of the child will be 0. xjm bzl qwu qpu thl kmi ogv csp ntk ogn koe eea bzn iqj sws