![]() It’s an effective and well-proven way for learners to encounter (a little robot with a pen) that draws on a sheet of paper on the floor. In Python, turtle graphics provides a representation of a physical “turtle” ![]() Turtle can draw intricate shapes using programs that repeat simple Introduced in Logo, developed by Wally Feurzeig, Seymour Papert and Cynthia Solomon Turtle graphics is an implementation of the popular geometric drawing tools Translation of docstrings into different languages.Methods specific to Screen, not inherited from TurtleScreen.Methods of TurtleScreen/Screen and corresponding functions.Methods of RawTurtle/Turtle and corresponding functions.Dealing with digital photo albums on the web you’ll see two basically different models. The “traditional” – one image per HTML page – and the “dynamic”, which changes the images on the same HTML page upon user interaction, utilizing Javascript. Sounds like a subtle technical detail but it has far reaching consequences. I’ve seen a lot of confusion regarding these modes, so I decided to put up this blog post.Īlthough this applies to any skin, I will talk specifically about the Turtle skin now, which has been enabled to generate traditional (separate slides) albums since version 4, just a few weeks ago. Here is the magic switch that decides between these modes in jAlbum, called “ Make slide pages“: Turn it on for the “Separate slide pages” mode – the default is still the dynamic mode. In the traditional – separate slide pages – mode, the HTML page loads all the page components and all the widgets (like Facebook, Google +1, etc.) every time an image is loaded. Every page has a separate URL address, so you can bookmark or share images separately and can use external widgets which rely on the page address, for example Facebook commenting. The downside is inherent in the web technology which doesn’t allow transitions between web pages, nothing can remain from a previous page (like background music), and need to build every page from ground, loading and rendering everything on a page again and again. This is why Turtle skin was originally made dynamic. #Jalbum turtle fullĪ dynamic album is capable of making smooth transitions between the images, loading only the necessary components, an rendering a full folder only once. You might ask why did then Turtle introduce the traditional mode at all. It’s because there are several scenarios when the separate slides mode is still beneficial, e.g. achieving better search results, being able to comment images through Facebook separately, using several hundreds of images in the same folder, to name a few. It’s a fundamental change in the structure, every part of the code had to be rewritten to work in both modes. Tracking the actual image in dynamic mode In most browsers it falls back to windowed mode with every page changeĬommenting widget works, the others ignore itĮvery image is rendered on a separate html page Like, Comment, +1, PinIt, Share individual imagesĬan skip index page and auto-start slideshow Like, Comment, +1, PinIt, Share complete folders The number of page elements (thumbnails) is still limited To avoid memory leak in poorly written browsers I tried to find the best match between the two modes, still there are tons of differences. To be able to follow the actual image the skin is using a technique (using internal links), which adds the image name after the URL the following way. This makes it possible to bookmark, share individual images in dynamic albums, and also allows the browser’s back and forward buttons to work within the album. ![]() #Jalbum turtle codeĪ smart javascript function is monitoring the hash code in the URL, and instructs the album to load the appropriate image upon change. ![]() These anchors are not allowed by major social sites, unfortunately. I have no insider info on this matter, but I guess they don’t want to allow dynamic pages to be shared, because they afraid of manipulation. They can’t check out the contents upfront. Think of sharing a funny cat video to millions then showing offending content after a while. They are trying to maintain “link quality” on their sites, and I agree this is a necessary precaution. Conclusionīoth modes have its ups and downs – which is better boils down to what you are using the album. ![]()
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