gtk-rs-core VS poppler-rs

nix-software-center> [1/6] Generating src/resources_gresource with a custom command nix-software-center> xml-stripblanks preprocessing requested, but XMLLINT is not set, and xmllint is not in PATH nix-software-center> [4/6] Generating data/dev.vlinkz.NixSoftwareCenter.metainfo.xml with a custom command nix-software-center> FAILED: src/nix-software-center nix-software-center> /nix/store/p643r4aczmzb0dhyrx3dj592f0s5v7xj-coreutils-9.0/bin/env CARGO_HOME=/build/r4npznxg986vxdl3gh7jhmqvv8jbvf02-source/build/cargo-home /nix/store/2gwhsd2jcz90zni0pwlhhfbmfbflixws-cargo-1.60.0/bin/cargo build --manifest-path /build/r4npznxg986vxdl3gh7jhmqvv8jbvf02-source/Cargo.toml --target-dir /build/r4npznxg986vxdl3gh7jhmqvv8jbvf02-source/build/src --release && cp src/release/nix-software-center src/nix-software-center nix-software-center> ninja: build stopped: subcommand failed. error: builder for '/nix/store/m9kf43zsr5hkq2igfdnag0phq154igks-nix-software-center-0.0.1.drv' failed with exit code 1; last 10 log lines: > building > build flags: -j8 -l8 > [0/6] Generating src/cargo-build with a custom command > error: package cairo-sys-rs v0.16.0 (https://github.com/gtk-rs/gtk-rs-core#9fe7e5ce) cannot be built because it requires rustc 1.63 or newer, while the currently active rustc version is 1.60.0 > [1/6] Generating src/resources_gresource with a custom command > xml-stripblanks preprocessing requested, but XMLLINT is not set, and xmllint is not in PATH > [4/6] Generating data/dev.vlinkz.NixSoftwareCenter.metainfo.xml with a custom command > FAILED: src/nix-software-center > /nix/store/p643r4aczmzb0dhyrx3dj592f0s5v7xj-coreutils-9.0/bin/env CARGO_HOME=/build/r4npznxg986vxdl3gh7jhmqvv8jbvf02-source/build/cargo-home /nix/store/2gwhsd2jcz90zni0pwlhhfbmfbflixws-cargo-1.60.0/bin/cargo build --manifest-path /build/r4npznxg986vxdl3gh7jhmqvv8jbvf02-source/Cargo.toml --target-dir /build/r4npznxg986vxdl3gh7jhmqvv8jbvf02-source/build/src --release && cp src/release/nix-software-center src/nix-software-center > ninja: build stopped: subcommand failed. For full logs, run 'nix log /nix/store/m9kf43zsr5hkq2igfdnag0phq154igks-nix-software-center-0.0.1.drv'. error: 1 dependencies of derivation '/nix/store/clykb6wwpv08l2vxnvnx8br7fzpx2y63-system-path.drv' failed to build error: 1 dependencies of derivation '/nix/store/321q6c143bf5w7m8njzvqkhjillbssk5-nixos-system-nflx-erahhal-t490s-22.05.20220902.67e4507.drv' failed to build

"Automatically figuring out which parent objects the class you're subclassing derives from"

AFAIK this is a language limitation, there is no way in a Rust macro to take a type and get all the traits that are implemented for that type.

"Helpers for properties and signals"

There is an open issue for this: https://github.com/gtk-rs/gtk-rs-core/issues/27

"A flat list of methods, instead of the public/imp split"

You can already do this in your code and use "pub fn" and "fn" like normal.

"I feel like I had a difficult time figuring out how to share state between widgets. You end up with lots of OnceCell, Rc, and RefCell, and it quickly becomes confusing,"

I think you are supposed to use bind_property and the gtk::Expression objects to do data binding, though that part is not so convenient to use from C or Rust either.

Ideally this should be automated with a nice derive macro, see https://github.com/gtk-rs/gtk-rs-core/issues/27 . How that could look exactly is still up to discussion and not so easy while keeping it flexible. That derive macro would then likely also work with the id: usize parameter to the property setter/getter instead of the string name.

test2_from_file appears to read a PDF file and output a PNG. You probably can strip that down and use it.