Question 1

How to theme fltk-rs apps to look more modern?

Accepted Answer

Use App::with_scheme() for built-in themes like Oxy or GTK, and integrate the fltk-theme crate for additional options. Customize per widget with set_color() and set_font(), but achieving material design requires significant CSS-like effort.

Question 2

fltk-rs vs egui: which is better for a data visualization tool?

Accepted Answer

fltk-rs offers smaller binaries and lower runtime overhead, suitable for performance-critical tools. egui provides immediate-mode rendering with easier integration for real-time graphics but larger executables; choose based on binary size vs. development speed.

Question 3

Can fltk-rs run on Raspberry Pi?

Accepted Answer

Yes, fltk-rs supports ARM architectures like aarch64 Linux, and the README mentions bundled builds for such platforms. Ensure X11 or Wayland dependencies are installed, but performance may vary on very low-end hardware.

Question 4

How to handle multiple windows in fltk-rs?

Accepted Answer

Create multiple Window instances and manage them via the app event loop. The README shows basic examples, but for complex inter-window communication, use app::channel() for message passing or shared state.

Question 5

What are the deployment steps for fltk-rs on Windows?

Accepted Answer

Statically linked executables require no DLLs; just distribute the single .exe file. For bundled builds, enable the fltk-bundled feature in Cargo.toml to avoid external dependencies, as noted in the README.

Question 6

Is there drag-and-drop GUI design support for fltk-rs?

Accepted Answer

Yes, FLUID is the official designer, and the fl2rust crate converts .fl files to Rust code. However, integration is less seamless than in frameworks with built-in editors, requiring extra setup steps.

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