One of my favorite things about Mac OS is something subtle that took me a while to notice: it doesn't ask stupid questions. If you delete a file on a Mac it goes to the trashcan immediately, no question. Even though other OS's copied the trashcan concept they didn't embrace it in the same way, most of them still ask whether you are sure about this action even though the action is reversible.Read More
SVG (Scalable Vector Graphics) is an XML based image format that represents an image as vectors instead of pixels (raster). An SVG file is represented by the set of lines & shapes that make it and can thus be rendered at any resolution without quality degradation due to scaling. It has some other neat tricks up its sleeve but I'm only going to discuss that specific feature today.Read More
A developer recently asked me why
Display is called
Display when it has such a broad purpose?
The reason is historic with roots in Codename One's origin back in 2007, when we formed the company Chen advocated for a rename of that class and I disagreed. In retrospect I was wrong, the name doesn't work.
Image masking allows us to adapt an image which we acquired from an external source to fit our design e.g. if we want to show an image cropped to a circle we could apply a mask to it in order to get an intelligent crop. This is a very powerful tool as a designer can supply a hardcoded mask image and build some pretty complex shapes that include an alpha channel as well (making it superior to shape clipping).Read More
Theming allows us to adapt the look of an application in a similar way to CSS while styling allows us to do so within the code. In this tutorial I cover only a small fraction of the subject matter but after going thru it you should have a decent understanding of the forces at play and the tools you can use.Read More
Until this weeks release push notification was registered using
Display.registerPush(Hashtable, boolean) the thing is that both of these arguments to that method are no longer used or not the best way to implement registration. So we deprecated that method and introduced a new version of the method
One of the key takeaways I have from the bootcamp is the need to work on TDD in Codename One. We had a test framework and test recording framework for years, but it wasn't picked up by many developers and as such it stagnated. As we launched the
Toolbar API we didn't even check that framework and some basic stuff stopped working.
Tracking & logging errors is crucial for a stable application. There are several tools we offer in Codename One both in the seamless level (crash protection) and in the lower level inner workings of Codename One. I'll try to explain both and how they interact.Read More
Layouts are one of the hardest subjects to grasp in Codename One, there is a lot of nuance in getting layouts "right". Since the subject is so vast and complex this video only scratches the surface and is still relatively long for an introductory video. It's crucial to go thru this material though if you are not familiar with layouts or find them confusing.Read More