Codename One Adds watchOS and Wear OS Support via Single Java/Kotlin Codebase

·1 views

Codename One, an open-source framework for building cross-platform apps from a single Java or Kotlin codebase, has released wearable support for both Apple watchOS and Google Wear OS. The watchOS port uses a dedicated Core Graphics rendering backend hosted inside a SwiftUI shell, since watchOS lacks UIKit, OpenGL ES, and Metal. Developers can share the same codebase across phone and watch apps, controlling per screen how much of the UI is displayed on the smaller device. A dedicated entry point, codename1.watchMain, allows the watch build to start from a lightweight class, enabling dead-code elimination to reduce the memory and CPU footprint. On Apple devices, the watch app is embedded within the iOS app by default so both install together, while a standalone watch-only build is also available.

Read the full story at DEV Community

This is an AI-generated summary. ShortSingh links to the original source for the complete article.

Discussion (0)

Developer builds x86-64 JIT compiler to run scalar loops directly in native machine code

A developer working on V.E.L.O.C.I.T.Y.-OS, a bare-metal operating system project, has detailed Part 6 of a 12-part build series focused on compiling scalar code directly into raw x86-64 machine instructions at runtime. The motivation was to eliminate closure dispatch overhead that slowed down simple scalar loops, even as vector operations were already outperforming native Rust. The implementation introduces a scalar detector that identifies eligible AST blocks and an x86-64 emitter that writes machine code bytes into executable memory pages. Variable slots are mapped directly to preserved CPU registers R12 through R15, with support capped at four scalar variables per compiled block. The broader project aims to build a self-healing OS running entirely within the CPU's L3 cache, with future parts covering classic compiler passes, Ring 0 kernel transition, and bare-metal driver development.

0 comments Read more at DEV Community

ProgrammingDEV Community ·

How a Trade CRM Built Customer Financing Into Quotes and What It Cost

A software team building a CRM for trade contractors repeatedly received requests to add customer financing to quotes, eventually making it a core feature. They found that financing significantly improves close rates on large jobs, typically those above $3,000, by reframing lump-sum prices as monthly payments. However, contractors pay a dealer fee of up to around ten percent to the financing provider, which can silently erode job margins if not tracked carefully. The team had to engineer a single-link workflow covering quote approval, pre-qualification, and deposit payment, since delayed or multi-step processes caused customers to sign with competitors instead. They also flagged risks such as applicant denials creating awkward customer interactions and deferred-interest terms that can backfire on customers and damage the contractor's reputation.

0 comments Read more at DEV Community

ProgrammingHacker News ·

EU Releases Open-Source Tools for Decade-Long Energy Network Planning

The European Union has open-sourced a set of tools used for ten-year network development planning. The tools have been published on GitHub under the open-energy-transition organization. This move makes long-term energy infrastructure planning resources publicly accessible to researchers, developers, and policymakers. The release aims to promote transparency and collaboration in European energy network development. The project, known as open-tyndp, aligns with broader EU efforts to advance open and sustainable energy planning.

0 comments Read more at Hacker News

ProgrammingDEV Community ·

Developer Builds Hands-Free PC Control System Using Webcam and Microphone

A developer has created a proof-of-concept system that allows users to control a computer entirely without a mouse or keyboard, using only a webcam and microphone. The system uses MediaPipe FaceMesh to track 468 facial landmarks in real time, translating head movements into cursor control, eye blinks into left-clicks, and mouth opening into right-clicks. Voice commands are processed through a speech recognition module to execute actions such as opening applications or switching windows. The project was built using consumer-grade hardware to demonstrate that hands-free computing is accessible without expensive specialized equipment. Potential use cases include accessibility for people with motor impairments, sterile medical environments, ergonomic improvement, and productivity enhancement.

0 comments Read more at DEV Community